Add Interix support

2011-02-09 14:56:23 -05:00
parent eab6e41cde
commit 747d6c32d4
18 changed files with 23616 additions and 7955 deletions
--- a/.pc/applied-patches
+++ b/.pc/applied-patches
@@ -14,3 +14,4 @@ hpux-mallinfo
 copyright-updates
 ios
 fix-xfails
+interix
--- a/.pc/interix/.timestamp
+++ b/.pc/interix/.timestamp
--- a/.pc/interix/ChangeLog
+++ b/.pc/interix/ChangeLog
--- a/.pc/interix/README
+++ b/.pc/interix/README
@@ -0,0 +1,337 @@
+Status
+======
+
+libffi-3.0.10 was released on XXXXXXXXXX, 2011. Check the libffi web
+page for updates: <URL:http://sourceware.org/libffi/>.
+
+
+What is libffi?
+===============
+
+Compilers for high level languages generate code that follow certain
+conventions. These conventions are necessary, in part, for separate
+compilation to work. One such convention is the "calling
+convention". The "calling convention" is essentially a set of
+assumptions made by the compiler about where function arguments will
+be found on entry to a function. A "calling convention" also specifies
+where the return value for a function is found.
+
+Some programs may not know at the time of compilation what arguments
+are to be passed to a function. For instance, an interpreter may be
+told at run-time about the number and types of arguments used to call
+a given function. Libffi can be used in such programs to provide a
+bridge from the interpreter program to compiled code.
+
+The libffi library provides a portable, high level programming
+interface to various calling conventions. This allows a programmer to
+call any function specified by a call interface description at run
+time.  
+
+FFI stands for Foreign Function Interface.  A foreign function
+interface is the popular name for the interface that allows code
+written in one language to call code written in another language. The
+libffi library really only provides the lowest, machine dependent
+layer of a fully featured foreign function interface. A layer must
+exist above libffi that handles type conversions for values passed
+between the two languages.
+
+
+Supported Platforms
+===================
+
+Libffi has been ported to many different platforms.
+For specific configuration details and testing status, please
+refer to the wiki page here:
+
+ http://www.moxielogic.org/wiki/index.php?title=Libffi_3.0.10
+
+At the time of release, the following basic configurations have been
+tested:
+
+|--------------+------------------|
+| Architecture | Operating System |
+|--------------+------------------|
+| Alpha        | Linux            |
+| Alpha        | Tru64            |
+| ARM          | Linux            |
+| ARM          | iOS              |
+| AVR32        | Linux            |
+| HPPA         | HPUX             |
+| IA-64        | Linux            |
+| M68K         | RTEMS            |
+| MIPS         | IRIX             |
+| MIPS         | Linux            |
+| MIPS         | RTEMS            |
+| MIPS64       | Linux            |
+| PowerPC      | Linux            |
+| PowerPC      | Mac OSX          |
+| PowerPC      | FreeBSD          |
+| PowerPC64    | Linux            |
+| S390         | Linux            |
+| S390X        | Linux            |
+| SPARC        | Linux            |
+| SPARC        | Solaris          |
+| SPARC64      | Linux            |
+| SPARC64      | FreeBSD          |
+| X86          | FreeBSD          |
+| X86          | kFreeBSD         |
+| X86          | Linux            |
+| X86          | Mac OSX          |
+| X86          | OpenBSD          |
+| X86          | OS/2             |
+| X86          | Solaris          |
+| X86          | Windows/Cygwin   |
+| X86          | Windows/MingW    |
+| X86-64       | FreeBSD          |
+| X86-64       | Linux            |
+| X86-64       | OpenBSD          |
+| X86-64       | Windows/MingW    |
+|--------------+------------------|
+
+Please send additional platform test results to
+libffi-discuss@sourceware.org and feel free to update the wiki page
+above.
+
+Installing libffi
+=================
+
+First you must configure the distribution for your particular
+system. Go to the directory you wish to build libffi in and run the
+"configure" program found in the root directory of the libffi source
+distribution.
+
+You may want to tell configure where to install the libffi library and
+header files. To do that, use the --prefix configure switch.  Libffi
+will install under /usr/local by default. 
+
+If you want to enable extra run-time debugging checks use the the
+--enable-debug configure switch. This is useful when your program dies
+mysteriously while using libffi. 
+
+Another useful configure switch is --enable-purify-safety. Using this
+will add some extra code which will suppress certain warnings when you
+are using Purify with libffi. Only use this switch when using 
+Purify, as it will slow down the library.
+
+It's also possible to build libffi on Windows platforms with
+Microsoft's Visual C++ compiler.  In this case, use the msvcc.sh
+wrapper script during configuration like so:
+
+path/to/configure CC=path/to/msvcc.sh LD=link CPP=\"cl -nologo -EP\"
+
+For 64-bit Windows builds, use CC="path/to/msvcc.sh -m64".
+You may also need to specify --build appropriately. When building with MSVC
+under a MingW environment, you may need to remove the line in configure
+that sets 'fix_srcfile_path' to a 'cygpath' command. ('cygpath' is not
+present in MingW, and is not required when using MingW-style paths.)
+
+For iOS builds, refer to the build-ios.sh script for guidance.
+
+Configure has many other options. Use "configure --help" to see them all.
+
+Once configure has finished, type "make". Note that you must be using
+GNU make.  You can ftp GNU make from prep.ai.mit.edu:/pub/gnu.
+
+To ensure that libffi is working as advertised, type "make check".
+This will require that you have DejaGNU installed.
+
+To install the library and header files, type "make install".
+
+
+History
+=======
+
+See the ChangeLog files for details.
+
+3.0.10 ???-??-??
+        Add support for Apple's iOS.
+        Add RTEMS support for MIPS and M68K.
+	Fix the N64 build on mips-sgi-irix6.5.
+	Enable builds with Microsoft's compiler.
+	Enable x86 builds with Oracle's Solaris compiler.
+	Fix support for calling code compiled with Oracle's Sparc
+	  Solaris compiler.
+	Testsuite fixes for Tru64 Unix.
+
+3.0.9 Dec-31-09
+        Add AVR32 and win64 ports.  Add ARM softfp support.
+	Many fixes for AIX, Solaris, HP-UX, *BSD.
+	Several PowerPC and x86-64 bug fixes.
+	Build DLL for windows.
+
+3.0.8 Dec-19-08
+        Add *BSD, BeOS, and PA-Linux support.
+
+3.0.7 Nov-11-08
+        Fix for ppc FreeBSD.
+	(thanks to Andreas Tobler)
+
+3.0.6 Jul-17-08
+        Fix for closures on sh.
+	Mark the sh/sh64 stack as non-executable.
+	(both thanks to Kaz Kojima)
+
+3.0.5 Apr-3-08
+        Fix libffi.pc file.
+	Fix #define ARM for IcedTea users.
+	Fix x86 closure bug.
+
+3.0.4 Feb-24-08
+        Fix x86 OpenBSD configury.
+
+3.0.3 Feb-22-08
+        Enable x86 OpenBSD thanks to Thomas Heller, and
+	x86-64 FreeBSD thanks to Björn König and Andreas Tobler.
+	Clean up test instruction in README.
+
+3.0.2 Feb-21-08
+        Improved x86 FreeBSD support.
+	Thanks to Björn König.
+
+3.0.1 Feb-15-08
+        Fix instruction cache flushing bug on MIPS.
+	Thanks to David Daney.
+
+3.0.0 Feb-15-08
+        Many changes, mostly thanks to the GCC project.
+	Cygnus Solutions is now Red Hat.
+
+  [10 years go by...]
+
+1.20 Oct-5-98
+	Raffaele Sena produces ARM port.
+
+1.19 Oct-5-98
+	Fixed x86 long double and long long return support.
+	m68k bug fixes from Andreas Schwab.
+	Patch for DU assembler compatibility for the Alpha from Richard
+	Henderson.
+
+1.18 Apr-17-98
+	Bug fixes and MIPS configuration changes.
+
+1.17 Feb-24-98
+	Bug fixes and m68k port from Andreas Schwab. PowerPC port from
+	Geoffrey Keating. Various bug x86, Sparc and MIPS bug fixes.
+
+1.16 Feb-11-98
+	Richard Henderson produces Alpha port.
+
+1.15 Dec-4-97
+	Fixed an n32 ABI bug. New libtool, auto* support.
+
+1.14 May-13-97
+	libtool is now used to generate shared and static libraries.
+	Fixed a minor portability problem reported by Russ McManus
+	<mcmanr@eq.gs.com>.
+
+1.13 Dec-2-96
+	Added --enable-purify-safety to keep Purify from complaining
+	about certain low level code.
+	Sparc fix for calling functions with < 6 args.
+	Linux x86 a.out fix.
+
+1.12 Nov-22-96
+	Added missing ffi_type_void, needed for supporting void return 
+	types. Fixed test case for non MIPS machines. Cygnus Support 
+	is now Cygnus Solutions. 
+
+1.11 Oct-30-96
+	Added notes about GNU make.
+
+1.10 Oct-29-96
+	Added configuration fix for non GNU compilers.
+
+1.09 Oct-29-96
+	Added --enable-debug configure switch. Clean-ups based on LCLint 
+	feedback. ffi_mips.h is always installed. Many configuration 
+	fixes. Fixed ffitest.c for sparc builds.
+
+1.08 Oct-15-96
+	Fixed n32 problem. Many clean-ups.
+
+1.07 Oct-14-96
+	Gordon Irlam rewrites v8.S again. Bug fixes.
+
+1.06 Oct-14-96
+	Gordon Irlam improved the sparc port. 
+
+1.05 Oct-14-96
+	Interface changes based on feedback.
+
+1.04 Oct-11-96
+	Sparc port complete (modulo struct passing bug).
+
+1.03 Oct-10-96
+	Passing struct args, and returning struct values works for
+	all architectures/calling conventions. Expanded tests.
+
+1.02 Oct-9-96
+	Added SGI n32 support. Fixed bugs in both o32 and Linux support.
+	Added "make test".
+
+1.01 Oct-8-96
+	Fixed float passing bug in mips version. Restructured some
+	of the code. Builds cleanly with SGI tools.
+
+1.00 Oct-7-96
+	First release. No public announcement.
+
+
+Authors & Credits
+=================
+
+libffi was originally written by Anthony Green <green@redhat.com>.
+
+The developers of the GNU Compiler Collection project have made
+innumerable valuable contributions.  See the ChangeLog file for
+details.
+
+Some of the ideas behind libffi were inspired by Gianni Mariani's free
+gencall library for Silicon Graphics machines.
+
+The closure mechanism was designed and implemented by Kresten Krab
+Thorup.
+
+Major processor architecture ports were contributed by the following
+developers:
+
+alpha		Richard Henderson
+arm		Raffaele Sena
+cris		Simon Posnjak, Hans-Peter Nilsson
+frv		Anthony Green
+ia64		Hans Boehm
+m32r		Kazuhiro Inaoka
+m68k		Andreas Schwab
+mips		Anthony Green, Casey Marshall
+mips64		David Daney
+pa		Randolph Chung, Dave Anglin, Andreas Tobler
+powerpc		Geoffrey Keating, Andreas Tobler, 
+			 David Edelsohn, John Hornkvist
+powerpc64	Jakub Jelinek
+s390		Gerhard Tonn, Ulrich Weigand
+sh		Kaz Kojima
+sh64		Kaz Kojima
+sparc		Anthony Green, Gordon Irlam
+x86		Anthony Green, Jon Beniston
+x86-64		Bo Thorsen
+
+Jesper Skov and Andrew Haley both did more than their fair share of
+stepping through the code and tracking down bugs.
+
+Thanks also to Tom Tromey for bug fixes, documentation and
+configuration help.
+
+Thanks to Jim Blandy, who provided some useful feedback on the libffi
+interface.
+
+Andreas Tobler has done a tremendous amount of work on the testsuite.
+
+Alex Oliva solved the executable page problem for SElinux.
+
+The list above is almost certainly incomplete and inaccurate.  I'm
+happy to make corrections or additions upon request.
+
+If you have a problem, or have found a bug, please send a note to the
+author at green@moxielogic.com, or the project mailing list at
+libffi-discuss@sourceware.org.
--- a/.pc/interix/configure
+++ b/.pc/interix/configure
--- a/.pc/interix/configure.ac
+++ b/.pc/interix/configure.ac
@@ -0,0 +1,482 @@
+dnl Process this with autoconf to create configure
+
+AC_PREREQ(2.63)
+
+AC_INIT([libffi], [3.0.10rc2], [http://gcc.gnu.org/bugs.html])
+AC_CONFIG_HEADERS([fficonfig.h])
+
+AC_CANONICAL_SYSTEM
+target_alias=${target_alias-$host_alias}
+
+. ${srcdir}/configure.host
+
+AM_INIT_AUTOMAKE
+
+# The same as in boehm-gc and libstdc++. Have to borrow it from there.
+# We must force CC to /not/ be precious variables; otherwise
+# the wrong, non-multilib-adjusted value will be used in multilibs.
+# As a side effect, we have to subst CFLAGS ourselves.
+# Also save and restore CFLAGS, since AC_PROG_CC will come up with
+# defaults of its own if none are provided.
+
+m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
+m4_define([_AC_ARG_VAR_PRECIOUS],[])
+save_CFLAGS=$CFLAGS
+AC_PROG_CC
+CFLAGS=$save_CFLAGS
+m4_undefine([_AC_ARG_VAR_PRECIOUS])
+m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
+
+AC_SUBST(CFLAGS)
+
+AM_PROG_AS
+AM_PROG_CC_C_O
+AC_PROG_LIBTOOL
+AC_CONFIG_MACRO_DIR([m4])
+
+AM_MAINTAINER_MODE
+
+AC_CHECK_HEADERS(sys/mman.h)
+AC_CHECK_FUNCS(mmap)
+AC_FUNC_MMAP_BLACKLIST
+
+dnl The -no-testsuite modules omit the test subdir.
+AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)
+
+TARGETDIR="unknown"
+case "$host" in
+  alpha*-*-*)
+	TARGET=ALPHA; TARGETDIR=alpha;
+	# Support 128-bit long double, changeable via command-line switch.
+	HAVE_LONG_DOUBLE='defined(__LONG_DOUBLE_128__)'
+	;;
+
+  arm*-*-*)
+	TARGET=ARM; TARGETDIR=arm
+	;;
+
+  amd64-*-freebsd* | amd64-*-openbsd*)
+	TARGET=X86_64; TARGETDIR=x86
+  	;;
+
+  amd64-*-freebsd*)
+	TARGET=X86_64; TARGETDIR=x86
+	;;
+
+  avr32*-*-*)
+	TARGET=AVR32; TARGETDIR=avr32
+	;;
+
+  cris-*-*)
+	TARGET=LIBFFI_CRIS; TARGETDIR=cris
+	;;
+
+  frv-*-*)
+	TARGET=FRV; TARGETDIR=frv
+	;;
+
+  hppa*-*-linux* | parisc*-*-linux*)
+	TARGET=PA_LINUX; TARGETDIR=pa
+	;;
+  hppa*64-*-hpux*)
+	TARGET=PA64_HPUX; TARGETDIR=pa
+	;;
+  hppa*-*-hpux*)
+	TARGET=PA_HPUX; TARGETDIR=pa
+	;;
+
+  i?86-*-freebsd* | i?86-*-openbsd*)
+	TARGET=X86_FREEBSD; TARGETDIR=x86
+	;;
+  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2*)
+	TARGET=X86_WIN32; TARGETDIR=x86
+	# All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
+	# We must also check with_cross_host to decide if this is a native
+	# or cross-build and select where to install dlls appropriately.
+	if test -n "$with_cross_host" &&
+	   test x"$with_cross_host" != x"no"; then
+	  AM_LTLDFLAGS='-no-undefined -bindir "$(toolexeclibdir)"';
+	else
+	  AM_LTLDFLAGS='-no-undefined -bindir "$(bindir)"';
+	fi
+	;;
+  i?86-*-darwin*)
+	TARGET=X86_DARWIN; TARGETDIR=x86
+	;;
+  i?86-*-solaris2.1[[0-9]]*)
+	TARGET=X86_64; TARGETDIR=x86
+	;;
+  i?86-*-*)
+	TARGET=X86; TARGETDIR=x86
+	;;
+
+  ia64*-*-*)
+	TARGET=IA64; TARGETDIR=ia64
+	;;
+
+  m32r*-*-*)
+	TARGET=M32R; TARGETDIR=m32r
+	;;
+
+  m68k-*-*)
+	TARGET=M68K; TARGETDIR=m68k
+	;;
+
+  mips-sgi-irix5.* | mips-sgi-irix6.* | mips*-*-rtems*)
+	TARGET=MIPS; TARGETDIR=mips
+	;;
+  mips*-*-linux*)
+	# Support 128-bit long double for NewABI.
+	HAVE_LONG_DOUBLE='defined(__mips64)'
+	TARGET=MIPS; TARGETDIR=mips
+	;;
+
+  powerpc*-*-linux* | powerpc-*-sysv*)
+	TARGET=POWERPC; TARGETDIR=powerpc
+	;;
+  powerpc-*-beos*)
+	TARGET=POWERPC; TARGETDIR=powerpc
+	;;
+  powerpc-*-darwin*)
+	TARGET=POWERPC_DARWIN; TARGETDIR=powerpc
+	;;
+  powerpc-*-aix* | rs6000-*-aix*)
+	TARGET=POWERPC_AIX; TARGETDIR=powerpc
+	;;
+  powerpc-*-freebsd*)
+	TARGET=POWERPC_FREEBSD; TARGETDIR=powerpc
+	;;
+ powerpc64-*-freebsd*)
+	TARGET=POWERPC; TARGETDIR=powerpc
+	;;
+  powerpc*-*-rtems*)
+	TARGET=POWERPC; TARGETDIR=powerpc
+	;;
+
+  s390-*-* | s390x-*-*)
+	TARGET=S390; TARGETDIR=s390
+	;;
+
+  sh-*-* | sh[[34]]*-*-*)
+	TARGET=SH; TARGETDIR=sh
+	;;
+  sh64-*-* | sh5*-*-*)
+	TARGET=SH64; TARGETDIR=sh64
+	;;
+
+  sparc*-*-*)
+	TARGET=SPARC; TARGETDIR=sparc
+	;;
+
+  x86_64-*-darwin*)
+	TARGET=X86_DARWIN; TARGETDIR=x86
+	;;
+
+  x86_64-*-cygwin* | x86_64-*-mingw*)
+	TARGET=X86_WIN64; TARGETDIR=x86
+	;;
+
+  x86_64-*-*)
+	TARGET=X86_64; TARGETDIR=x86
+	;;
+esac
+
+AC_SUBST(AM_RUNTESTFLAGS)
+AC_SUBST(AM_LTLDFLAGS)
+
+if test $TARGETDIR = unknown; then
+  AC_MSG_ERROR(["libffi has not been ported to $host."])
+fi
+
+AM_CONDITIONAL(MIPS, test x$TARGET = xMIPS)
+AM_CONDITIONAL(SPARC, test x$TARGET = xSPARC)
+AM_CONDITIONAL(X86, test x$TARGET = xX86)
+AM_CONDITIONAL(X86_FREEBSD, test x$TARGET = xX86_FREEBSD)
+AM_CONDITIONAL(X86_WIN32, test x$TARGET = xX86_WIN32)
+AM_CONDITIONAL(X86_WIN64, test x$TARGET = xX86_WIN64)
+AM_CONDITIONAL(X86_DARWIN, test x$TARGET = xX86_DARWIN)
+AM_CONDITIONAL(ALPHA, test x$TARGET = xALPHA)
+AM_CONDITIONAL(IA64, test x$TARGET = xIA64)
+AM_CONDITIONAL(M32R, test x$TARGET = xM32R)
+AM_CONDITIONAL(M68K, test x$TARGET = xM68K)
+AM_CONDITIONAL(MOXIE, test x$TARGET = xMOXIE)
+AM_CONDITIONAL(POWERPC, test x$TARGET = xPOWERPC)
+AM_CONDITIONAL(POWERPC_AIX, test x$TARGET = xPOWERPC_AIX)
+AM_CONDITIONAL(POWERPC_DARWIN, test x$TARGET = xPOWERPC_DARWIN)
+AM_CONDITIONAL(POWERPC_FREEBSD, test x$TARGET = xPOWERPC_FREEBSD)
+AM_CONDITIONAL(ARM, test x$TARGET = xARM)
+AM_CONDITIONAL(AVR32, test x$TARGET = xAVR32)
+AM_CONDITIONAL(LIBFFI_CRIS, test x$TARGET = xLIBFFI_CRIS)
+AM_CONDITIONAL(FRV, test x$TARGET = xFRV)
+AM_CONDITIONAL(S390, test x$TARGET = xS390)
+AM_CONDITIONAL(X86_64, test x$TARGET = xX86_64)
+AM_CONDITIONAL(SH, test x$TARGET = xSH)
+AM_CONDITIONAL(SH64, test x$TARGET = xSH64)
+AM_CONDITIONAL(PA_LINUX, test x$TARGET = xPA_LINUX)
+AM_CONDITIONAL(PA_HPUX, test x$TARGET = xPA_HPUX)
+AM_CONDITIONAL(PA64_HPUX, test x$TARGET = xPA64_HPUX)
+
+AC_HEADER_STDC
+AC_CHECK_FUNCS(memcpy)
+AC_FUNC_ALLOCA
+
+AC_CHECK_SIZEOF(double)
+AC_CHECK_SIZEOF(long double)
+
+# Also AC_SUBST this variable for ffi.h.
+if test -z "$HAVE_LONG_DOUBLE"; then
+  HAVE_LONG_DOUBLE=0
+  if test $ac_cv_sizeof_double != $ac_cv_sizeof_long_double; then
+    if test $ac_cv_sizeof_long_double != 0; then
+      HAVE_LONG_DOUBLE=1
+      AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the long double type and it is bigger than a double])
+    fi
+  fi
+fi
+AC_SUBST(HAVE_LONG_DOUBLE)
+
+AC_C_BIGENDIAN
+
+AC_CACHE_CHECK([assembler .cfi pseudo-op support],
+    libffi_cv_as_cfi_pseudo_op, [
+    libffi_cv_as_cfi_pseudo_op=unknown
+    AC_TRY_COMPILE([asm (".cfi_startproc\n\t.cfi_endproc");],,
+		   [libffi_cv_as_cfi_pseudo_op=yes],
+		   [libffi_cv_as_cfi_pseudo_op=no])
+])
+if test "x$libffi_cv_as_cfi_pseudo_op" = xyes; then
+    AC_DEFINE(HAVE_AS_CFI_PSEUDO_OP, 1,
+	      [Define if your assembler supports .cfi_* directives.])
+fi
+
+if test x$TARGET = xSPARC; then
+    AC_CACHE_CHECK([assembler and linker support unaligned pc related relocs],
+	libffi_cv_as_sparc_ua_pcrel, [
+	save_CFLAGS="$CFLAGS"
+	save_LDFLAGS="$LDFLAGS"
+	CFLAGS="$CFLAGS -fpic"
+	LDFLAGS="$LDFLAGS -shared"
+	AC_TRY_LINK([asm (".text; foo: nop; .data; .align 4; .byte 0; .uaword %r_disp32(foo); .text");],,
+		    [libffi_cv_as_sparc_ua_pcrel=yes],
+		    [libffi_cv_as_sparc_ua_pcrel=no])
+	CFLAGS="$save_CFLAGS"
+	LDFLAGS="$save_LDFLAGS"])
+    if test "x$libffi_cv_as_sparc_ua_pcrel" = xyes; then
+	AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
+		  [Define if your assembler and linker support unaligned PC relative relocs.])
+    fi
+
+    AC_CACHE_CHECK([assembler .register pseudo-op support],
+       libffi_cv_as_register_pseudo_op, [
+       libffi_cv_as_register_pseudo_op=unknown
+       # Check if we have .register
+       AC_TRY_COMPILE([asm (".register %g2, #scratch");],,
+		       [libffi_cv_as_register_pseudo_op=yes],
+		       [libffi_cv_as_register_pseudo_op=no])
+    ])
+    if test "x$libffi_cv_as_register_pseudo_op" = xyes; then
+       AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
+	       [Define if your assembler supports .register.])
+    fi
+fi
+
+if test x$TARGET = xX86 || test x$TARGET = xX86_WIN32 || test x$TARGET = xX86_64; then
+    AC_CACHE_CHECK([assembler supports pc related relocs],
+	libffi_cv_as_x86_pcrel, [
+	libffi_cv_as_x86_pcrel=no
+	echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
+	if $CC $CFLAGS -c conftest.s > /dev/null; then
+	   libffi_cv_as_x86_pcrel=yes
+	fi
+	])
+    if test "x$libffi_cv_as_x86_pcrel" = xyes; then
+	AC_DEFINE(HAVE_AS_X86_PCREL, 1,
+		  [Define if your assembler supports PC relative relocs.])
+    fi
+
+    AC_CACHE_CHECK([assembler .ascii pseudo-op support],
+       libffi_cv_as_ascii_pseudo_op, [
+       libffi_cv_as_ascii_pseudo_op=unknown
+       # Check if we have .ascii
+       AC_TRY_COMPILE([asm (".ascii \\"string\\"");],,
+		       [libffi_cv_as_ascii_pseudo_op=yes],
+		       [libffi_cv_as_ascii_pseudo_op=no])
+    ])
+    if test "x$libffi_cv_as_ascii_pseudo_op" = xyes; then
+       AC_DEFINE(HAVE_AS_ASCII_PSEUDO_OP, 1,
+	       [Define if your assembler supports .ascii.])
+    fi
+
+    AC_CACHE_CHECK([assembler .string pseudo-op support],
+       libffi_cv_as_string_pseudo_op, [
+       libffi_cv_as_string_pseudo_op=unknown
+       # Check if we have .string
+       AC_TRY_COMPILE([asm (".string \\"string\\"");],,
+		       [libffi_cv_as_string_pseudo_op=yes],
+		       [libffi_cv_as_string_pseudo_op=no])
+    ])
+    if test "x$libffi_cv_as_string_pseudo_op" = xyes; then
+       AC_DEFINE(HAVE_AS_STRING_PSEUDO_OP, 1,
+	       [Define if your assembler supports .string.])
+    fi
+fi
+
+if test x$TARGET = xX86_WIN64; then
+    LT_SYS_SYMBOL_USCORE
+    if test "x$sys_symbol_underscore" = xyes; then
+        AC_DEFINE(SYMBOL_UNDERSCORE, 1, [Define if symbols are underscored.])
+    fi
+fi
+
+
+FFI_EXEC_TRAMPOLINE_TABLE=0
+case "$target" in
+     *arm*-apple-darwin*)
+       FFI_EXEC_TRAMPOLINE_TABLE=1
+       AC_DEFINE(FFI_EXEC_TRAMPOLINE_TABLE, 1,
+                 [Cannot use PROT_EXEC on this target, so, we revert to
+                   alternative means])
+     ;;
+     *-apple-darwin10* | *-*-freebsd* | *-*-openbsd* | *-pc-solaris*)
+       AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
+                 [Cannot use malloc on this target, so, we revert to
+                   alternative means])
+     ;;
+esac
+AM_CONDITIONAL(FFI_EXEC_TRAMPOLINE_TABLE, test x$FFI_EXEC_TRAMPOLINE_TABLE = x1)
+AC_SUBST(FFI_EXEC_TRAMPOLINE_TABLE)
+
+if test x$TARGET = xX86_64; then
+    AC_CACHE_CHECK([assembler supports unwind section type],
+	libffi_cv_as_x86_64_unwind_section_type, [
+	libffi_cv_as_x86_64_unwind_section_type=yes
+	echo '.section .eh_frame,"a",@unwind' > conftest.s
+	if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
+	    libffi_cv_as_x86_64_unwind_section_type=no
+	fi
+	])
+    if test "x$libffi_cv_as_x86_64_unwind_section_type" = xyes; then
+	AC_DEFINE(HAVE_AS_X86_64_UNWIND_SECTION_TYPE, 1,
+		  [Define if your assembler supports unwind section type.])
+    fi
+fi
+
+AC_CACHE_CHECK([whether .eh_frame section should be read-only],
+    libffi_cv_ro_eh_frame, [
+	libffi_cv_ro_eh_frame=no
+	echo 'extern void foo (void); void bar (void) { foo (); foo (); }' > conftest.c
+	if $CC $CFLAGS -S -fpic -fexceptions -o conftest.s conftest.c > /dev/null 2>&1; then
+	    if grep '.section.*eh_frame.*"a"' conftest.s > /dev/null; then
+		libffi_cv_ro_eh_frame=yes
+	    elif grep '.section.*eh_frame.*#alloc' conftest.c \
+		 | grep -v '#write' > /dev/null; then
+		libffi_cv_ro_eh_frame=yes
+	    fi
+	fi
+	rm -f conftest.*
+    ])
+if test "x$libffi_cv_ro_eh_frame" = xyes; then
+    AC_DEFINE(HAVE_RO_EH_FRAME, 1,
+	      [Define if .eh_frame sections should be read-only.])
+    AC_DEFINE(EH_FRAME_FLAGS, "a",
+	      [Define to the flags needed for the .section .eh_frame directive.])
+else
+    AC_DEFINE(EH_FRAME_FLAGS, "aw",
+	      [Define to the flags needed for the .section .eh_frame directive.])
+fi
+
+AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
+    libffi_cv_hidden_visibility_attribute, [
+	echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
+	libffi_cv_hidden_visibility_attribute=no
+	if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
+	    if grep '\.hidden.*foo' conftest.s >/dev/null; then
+		libffi_cv_hidden_visibility_attribute=yes
+	    fi
+	fi
+	rm -f conftest.*
+    ])
+if test $libffi_cv_hidden_visibility_attribute = yes; then
+    AC_DEFINE(HAVE_HIDDEN_VISIBILITY_ATTRIBUTE, 1,
+	      [Define if __attribute__((visibility("hidden"))) is supported.])
+fi
+
+AH_BOTTOM([
+#ifdef HAVE_HIDDEN_VISIBILITY_ATTRIBUTE
+#ifdef LIBFFI_ASM
+#define FFI_HIDDEN(name) .hidden name
+#else
+#define FFI_HIDDEN __attribute__ ((visibility ("hidden")))
+#endif
+#else
+#ifdef LIBFFI_ASM
+#define FFI_HIDDEN(name)
+#else
+#define FFI_HIDDEN
+#endif
+#endif
+])
+
+AC_SUBST(TARGET)
+AC_SUBST(TARGETDIR)
+
+AC_SUBST(SHELL)
+
+AC_ARG_ENABLE(debug,
+[  --enable-debug          debugging mode],
+  if test "$enable_debug" = "yes"; then
+    AC_DEFINE(FFI_DEBUG, 1, [Define this if you want extra debugging.])
+  fi)
+AM_CONDITIONAL(FFI_DEBUG, test "$enable_debug" = "yes")
+
+AC_ARG_ENABLE(structs,
+[  --disable-structs       omit code for struct support],
+  if test "$enable_structs" = "no"; then
+    AC_DEFINE(FFI_NO_STRUCTS, 1, [Define this is you do not want support for aggregate types.])
+  fi)
+
+AC_ARG_ENABLE(raw-api,
+[  --disable-raw-api       make the raw api unavailable],
+  if test "$enable_raw_api" = "no"; then
+    AC_DEFINE(FFI_NO_RAW_API, 1, [Define this is you do not want support for the raw API.])
+  fi)
+
+AC_ARG_ENABLE(purify-safety,
+[  --enable-purify-safety  purify-safe mode],
+  if test "$enable_purify_safety" = "yes"; then
+    AC_DEFINE(USING_PURIFY, 1, [Define this if you are using Purify and want to suppress spurious messages.])
+  fi)
+
+if test -n "$with_cross_host" &&
+   test x"$with_cross_host" != x"no"; then
+  toolexecdir='$(exec_prefix)/$(target_alias)'
+  toolexeclibdir='$(toolexecdir)/lib'
+else
+  toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
+  toolexeclibdir='$(libdir)'
+fi
+multi_os_directory=`$CC -print-multi-os-directory`
+case $multi_os_directory in
+  .) ;; # Avoid trailing /.
+  *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
+esac
+AC_SUBST(toolexecdir)
+AC_SUBST(toolexeclibdir)
+
+if test "${multilib}" = "yes"; then
+  multilib_arg="--enable-multilib"
+else
+  multilib_arg=
+fi
+
+AC_CONFIG_COMMANDS(include, [test -d include || mkdir include])
+AC_CONFIG_COMMANDS(src, [
+test -d src || mkdir src
+test -d src/$TARGETDIR || mkdir src/$TARGETDIR
+], [TARGETDIR="$TARGETDIR"])
+
+AC_CONFIG_LINKS(include/ffitarget.h:src/$TARGETDIR/ffitarget.h)
+
+AC_CONFIG_FILES(include/Makefile include/ffi.h Makefile testsuite/Makefile man/Makefile libffi.pc)
+
+AC_OUTPUT
--- a/.pc/interix/src/closures.c
+++ b/.pc/interix/src/closures.c
@@ -0,0 +1,615 @@
+/* -----------------------------------------------------------------------
+   closures.c - Copyright (c) 2007, 2009, 2010  Red Hat, Inc.
+                Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc
+                Copyright (c) 2011 Plausible Labs Cooperative, Inc.
+
+   Code to allocate and deallocate memory for closures.
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   ``Software''), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be included
+   in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+   NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+   DEALINGS IN THE SOFTWARE.
+   ----------------------------------------------------------------------- */
+
+#if defined __linux__ && !defined _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#include <ffi.h>
+#include <ffi_common.h>
+
+#if !FFI_MMAP_EXEC_WRIT && !FFI_EXEC_TRAMPOLINE_TABLE
+# if __gnu_linux__
+/* This macro indicates it may be forbidden to map anonymous memory
+   with both write and execute permission.  Code compiled when this
+   option is defined will attempt to map such pages once, but if it
+   fails, it falls back to creating a temporary file in a writable and
+   executable filesystem and mapping pages from it into separate
+   locations in the virtual memory space, one location writable and
+   another executable.  */
+#  define FFI_MMAP_EXEC_WRIT 1
+#  define HAVE_MNTENT 1
+# endif
+# if defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)
+/* Windows systems may have Data Execution Protection (DEP) enabled, 
+   which requires the use of VirtualMalloc/VirtualFree to alloc/free
+   executable memory. */
+#  define FFI_MMAP_EXEC_WRIT 1
+# endif
+#endif
+
+#if FFI_MMAP_EXEC_WRIT && !defined FFI_MMAP_EXEC_SELINUX
+# ifdef __linux__
+/* When defined to 1 check for SELinux and if SELinux is active,
+   don't attempt PROT_EXEC|PROT_WRITE mapping at all, as that
+   might cause audit messages.  */
+#  define FFI_MMAP_EXEC_SELINUX 1
+# endif
+#endif
+
+#if FFI_CLOSURES
+
+# if FFI_EXEC_TRAMPOLINE_TABLE
+
+// Per-target implementation; It's unclear what can reasonable be shared between two OS/architecture implementations.
+
+# elif FFI_MMAP_EXEC_WRIT /* !FFI_EXEC_TRAMPOLINE_TABLE */
+
+#define USE_LOCKS 1
+#define USE_DL_PREFIX 1
+#ifdef __GNUC__
+#ifndef USE_BUILTIN_FFS
+#define USE_BUILTIN_FFS 1
+#endif
+#endif
+
+/* We need to use mmap, not sbrk.  */
+#define HAVE_MORECORE 0
+
+/* We could, in theory, support mremap, but it wouldn't buy us anything.  */
+#define HAVE_MREMAP 0
+
+/* We have no use for this, so save some code and data.  */
+#define NO_MALLINFO 1
+
+/* We need all allocations to be in regular segments, otherwise we
+   lose track of the corresponding code address.  */
+#define DEFAULT_MMAP_THRESHOLD MAX_SIZE_T
+
+/* Don't allocate more than a page unless needed.  */
+#define DEFAULT_GRANULARITY ((size_t)malloc_getpagesize)
+
+#if FFI_CLOSURE_TEST
+/* Don't release single pages, to avoid a worst-case scenario of
+   continuously allocating and releasing single pages, but release
+   pairs of pages, which should do just as well given that allocations
+   are likely to be small.  */
+#define DEFAULT_TRIM_THRESHOLD ((size_t)malloc_getpagesize)
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#ifndef _MSC_VER
+#include <unistd.h>
+#endif
+#include <string.h>
+#include <stdio.h>
+#if !defined(X86_WIN32) && !defined(X86_WIN64)
+#ifdef HAVE_MNTENT
+#include <mntent.h>
+#endif /* HAVE_MNTENT */
+#include <sys/param.h>
+#include <pthread.h>
+
+/* We don't want sys/mman.h to be included after we redefine mmap and
+   dlmunmap.  */
+#include <sys/mman.h>
+#define LACKS_SYS_MMAN_H 1
+
+#if FFI_MMAP_EXEC_SELINUX
+#include <sys/statfs.h>
+#include <stdlib.h>
+
+static int selinux_enabled = -1;
+
+static int
+selinux_enabled_check (void)
+{
+  struct statfs sfs;
+  FILE *f;
+  char *buf = NULL;
+  size_t len = 0;
+
+  if (statfs ("/selinux", &sfs) >= 0
+      && (unsigned int) sfs.f_type == 0xf97cff8cU)
+    return 1;
+  f = fopen ("/proc/mounts", "r");
+  if (f == NULL)
+    return 0;
+  while (getline (&buf, &len, f) >= 0)
+    {
+      char *p = strchr (buf, ' ');
+      if (p == NULL)
+        break;
+      p = strchr (p + 1, ' ');
+      if (p == NULL)
+        break;
+      if (strncmp (p + 1, "selinuxfs ", 10) == 0)
+        {
+          free (buf);
+          fclose (f);
+          return 1;
+        }
+    }
+  free (buf);
+  fclose (f);
+  return 0;
+}
+
+#define is_selinux_enabled() (selinux_enabled >= 0 ? selinux_enabled \
+			      : (selinux_enabled = selinux_enabled_check ()))
+
+#else
+
+#define is_selinux_enabled() 0
+
+#endif /* !FFI_MMAP_EXEC_SELINUX */
+
+#elif defined (__CYGWIN__)
+
+#include <sys/mman.h>
+
+/* Cygwin is Linux-like, but not quite that Linux-like.  */
+#define is_selinux_enabled() 0
+
+#endif /* !defined(X86_WIN32) && !defined(X86_WIN64) */
+
+/* Declare all functions defined in dlmalloc.c as static.  */
+static void *dlmalloc(size_t);
+static void dlfree(void*);
+static void *dlcalloc(size_t, size_t) MAYBE_UNUSED;
+static void *dlrealloc(void *, size_t) MAYBE_UNUSED;
+static void *dlmemalign(size_t, size_t) MAYBE_UNUSED;
+static void *dlvalloc(size_t) MAYBE_UNUSED;
+static int dlmallopt(int, int) MAYBE_UNUSED;
+static size_t dlmalloc_footprint(void) MAYBE_UNUSED;
+static size_t dlmalloc_max_footprint(void) MAYBE_UNUSED;
+static void** dlindependent_calloc(size_t, size_t, void**) MAYBE_UNUSED;
+static void** dlindependent_comalloc(size_t, size_t*, void**) MAYBE_UNUSED;
+static void *dlpvalloc(size_t) MAYBE_UNUSED;
+static int dlmalloc_trim(size_t) MAYBE_UNUSED;
+static size_t dlmalloc_usable_size(void*) MAYBE_UNUSED;
+static void dlmalloc_stats(void) MAYBE_UNUSED;
+
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
+/* Use these for mmap and munmap within dlmalloc.c.  */
+static void *dlmmap(void *, size_t, int, int, int, off_t);
+static int dlmunmap(void *, size_t);
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
+
+#define mmap dlmmap
+#define munmap dlmunmap
+
+#include "dlmalloc.c"
+
+#undef mmap
+#undef munmap
+
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
+
+/* A mutex used to synchronize access to *exec* variables in this file.  */
+static pthread_mutex_t open_temp_exec_file_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+/* A file descriptor of a temporary file from which we'll map
+   executable pages.  */
+static int execfd = -1;
+
+/* The amount of space already allocated from the temporary file.  */
+static size_t execsize = 0;
+
+/* Open a temporary file name, and immediately unlink it.  */
+static int
+open_temp_exec_file_name (char *name)
+{
+  int fd = mkstemp (name);
+
+  if (fd != -1)
+    unlink (name);
+
+  return fd;
+}
+
+/* Open a temporary file in the named directory.  */
+static int
+open_temp_exec_file_dir (const char *dir)
+{
+  static const char suffix[] = "/ffiXXXXXX";
+  int lendir = strlen (dir);
+  char *tempname = __builtin_alloca (lendir + sizeof (suffix));
+
+  if (!tempname)
+    return -1;
+
+  memcpy (tempname, dir, lendir);
+  memcpy (tempname + lendir, suffix, sizeof (suffix));
+
+  return open_temp_exec_file_name (tempname);
+}
+
+/* Open a temporary file in the directory in the named environment
+   variable.  */
+static int
+open_temp_exec_file_env (const char *envvar)
+{
+  const char *value = getenv (envvar);
+
+  if (!value)
+    return -1;
+
+  return open_temp_exec_file_dir (value);
+}
+
+#ifdef HAVE_MNTENT
+/* Open a temporary file in an executable and writable mount point
+   listed in the mounts file.  Subsequent calls with the same mounts
+   keep searching for mount points in the same file.  Providing NULL
+   as the mounts file closes the file.  */
+static int
+open_temp_exec_file_mnt (const char *mounts)
+{
+  static const char *last_mounts;
+  static FILE *last_mntent;
+
+  if (mounts != last_mounts)
+    {
+      if (last_mntent)
+	endmntent (last_mntent);
+
+      last_mounts = mounts;
+
+      if (mounts)
+	last_mntent = setmntent (mounts, "r");
+      else
+	last_mntent = NULL;
+    }
+
+  if (!last_mntent)
+    return -1;
+
+  for (;;)
+    {
+      int fd;
+      struct mntent mnt;
+      char buf[MAXPATHLEN * 3];
+
+      if (getmntent_r (last_mntent, &mnt, buf, sizeof (buf)) == NULL)
+	return -1;
+
+      if (hasmntopt (&mnt, "ro")
+	  || hasmntopt (&mnt, "noexec")
+	  || access (mnt.mnt_dir, W_OK))
+	continue;
+
+      fd = open_temp_exec_file_dir (mnt.mnt_dir);
+
+      if (fd != -1)
+	return fd;
+    }
+}
+#endif /* HAVE_MNTENT */
+
+/* Instructions to look for a location to hold a temporary file that
+   can be mapped in for execution.  */
+static struct
+{
+  int (*func)(const char *);
+  const char *arg;
+  int repeat;
+} open_temp_exec_file_opts[] = {
+  { open_temp_exec_file_env, "TMPDIR", 0 },
+  { open_temp_exec_file_dir, "/tmp", 0 },
+  { open_temp_exec_file_dir, "/var/tmp", 0 },
+  { open_temp_exec_file_dir, "/dev/shm", 0 },
+  { open_temp_exec_file_env, "HOME", 0 },
+#ifdef HAVE_MNTENT
+  { open_temp_exec_file_mnt, "/etc/mtab", 1 },
+  { open_temp_exec_file_mnt, "/proc/mounts", 1 },
+#endif /* HAVE_MNTENT */
+};
+
+/* Current index into open_temp_exec_file_opts.  */
+static int open_temp_exec_file_opts_idx = 0;
+
+/* Reset a current multi-call func, then advances to the next entry.
+   If we're at the last, go back to the first and return nonzero,
+   otherwise return zero.  */
+static int
+open_temp_exec_file_opts_next (void)
+{
+  if (open_temp_exec_file_opts[open_temp_exec_file_opts_idx].repeat)
+    open_temp_exec_file_opts[open_temp_exec_file_opts_idx].func (NULL);
+
+  open_temp_exec_file_opts_idx++;
+  if (open_temp_exec_file_opts_idx
+      == (sizeof (open_temp_exec_file_opts)
+	  / sizeof (*open_temp_exec_file_opts)))
+    {
+      open_temp_exec_file_opts_idx = 0;
+      return 1;
+    }
+
+  return 0;
+}
+
+/* Return a file descriptor of a temporary zero-sized file in a
+   writable and exexutable filesystem.  */
+static int
+open_temp_exec_file (void)
+{
+  int fd;
+
+  do
+    {
+      fd = open_temp_exec_file_opts[open_temp_exec_file_opts_idx].func
+	(open_temp_exec_file_opts[open_temp_exec_file_opts_idx].arg);
+
+      if (!open_temp_exec_file_opts[open_temp_exec_file_opts_idx].repeat
+	  || fd == -1)
+	{
+	  if (open_temp_exec_file_opts_next ())
+	    break;
+	}
+    }
+  while (fd == -1);
+
+  return fd;
+}
+
+/* Map in a chunk of memory from the temporary exec file into separate
+   locations in the virtual memory address space, one writable and one
+   executable.  Returns the address of the writable portion, after
+   storing an offset to the corresponding executable portion at the
+   last word of the requested chunk.  */
+static void *
+dlmmap_locked (void *start, size_t length, int prot, int flags, off_t offset)
+{
+  void *ptr;
+
+  if (execfd == -1)
+    {
+      open_temp_exec_file_opts_idx = 0;
+    retry_open:
+      execfd = open_temp_exec_file ();
+      if (execfd == -1)
+	return MFAIL;
+    }
+
+  offset = execsize;
+
+  if (ftruncate (execfd, offset + length))
+    return MFAIL;
+
+  flags &= ~(MAP_PRIVATE | MAP_ANONYMOUS);
+  flags |= MAP_SHARED;
+
+  ptr = mmap (NULL, length, (prot & ~PROT_WRITE) | PROT_EXEC,
+	      flags, execfd, offset);
+  if (ptr == MFAIL)
+    {
+      if (!offset)
+	{
+	  close (execfd);
+	  goto retry_open;
+	}
+      ftruncate (execfd, offset);
+      return MFAIL;
+    }
+  else if (!offset
+	   && open_temp_exec_file_opts[open_temp_exec_file_opts_idx].repeat)
+    open_temp_exec_file_opts_next ();
+
+  start = mmap (start, length, prot, flags, execfd, offset);
+
+  if (start == MFAIL)
+    {
+      munmap (ptr, length);
+      ftruncate (execfd, offset);
+      return start;
+    }
+
+  mmap_exec_offset ((char *)start, length) = (char*)ptr - (char*)start;
+
+  execsize += length;
+
+  return start;
+}
+
+/* Map in a writable and executable chunk of memory if possible.
+   Failing that, fall back to dlmmap_locked.  */
+static void *
+dlmmap (void *start, size_t length, int prot,
+	int flags, int fd, off_t offset)
+{
+  void *ptr;
+
+  assert (start == NULL && length % malloc_getpagesize == 0
+	  && prot == (PROT_READ | PROT_WRITE)
+	  && flags == (MAP_PRIVATE | MAP_ANONYMOUS)
+	  && fd == -1 && offset == 0);
+
+#if FFI_CLOSURE_TEST
+  printf ("mapping in %zi\n", length);
+#endif
+
+  if (execfd == -1 && !is_selinux_enabled ())
+    {
+      ptr = mmap (start, length, prot | PROT_EXEC, flags, fd, offset);
+
+      if (ptr != MFAIL || (errno != EPERM && errno != EACCES))
+	/* Cool, no need to mess with separate segments.  */
+	return ptr;
+
+      /* If MREMAP_DUP is ever introduced and implemented, try mmap
+	 with ((prot & ~PROT_WRITE) | PROT_EXEC) and mremap with
+	 MREMAP_DUP and prot at this point.  */
+    }
+
+  if (execsize == 0 || execfd == -1)
+    {
+      pthread_mutex_lock (&open_temp_exec_file_mutex);
+      ptr = dlmmap_locked (start, length, prot, flags, offset);
+      pthread_mutex_unlock (&open_temp_exec_file_mutex);
+
+      return ptr;
+    }
+
+  return dlmmap_locked (start, length, prot, flags, offset);
+}
+
+/* Release memory at the given address, as well as the corresponding
+   executable page if it's separate.  */
+static int
+dlmunmap (void *start, size_t length)
+{
+  /* We don't bother decreasing execsize or truncating the file, since
+     we can't quite tell whether we're unmapping the end of the file.
+     We don't expect frequent deallocation anyway.  If we did, we
+     could locate pages in the file by writing to the pages being
+     deallocated and checking that the file contents change.
+     Yuck.  */
+  msegmentptr seg = segment_holding (gm, start);
+  void *code;
+
+#if FFI_CLOSURE_TEST
+  printf ("unmapping %zi\n", length);
+#endif
+
+  if (seg && (code = add_segment_exec_offset (start, seg)) != start)
+    {
+      int ret = munmap (code, length);
+      if (ret)
+	return ret;
+    }
+
+  return munmap (start, length);
+}
+
+#if FFI_CLOSURE_FREE_CODE
+/* Return segment holding given code address.  */
+static msegmentptr
+segment_holding_code (mstate m, char* addr)
+{
+  msegmentptr sp = &m->seg;
+  for (;;) {
+    if (addr >= add_segment_exec_offset (sp->base, sp)
+	&& addr < add_segment_exec_offset (sp->base, sp) + sp->size)
+      return sp;
+    if ((sp = sp->next) == 0)
+      return 0;
+  }
+}
+#endif
+
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
+
+/* Allocate a chunk of memory with the given size.  Returns a pointer
+   to the writable address, and sets *CODE to the executable
+   corresponding virtual address.  */
+void *
+ffi_closure_alloc (size_t size, void **code)
+{
+  void *ptr;
+
+  if (!code)
+    return NULL;
+
+  ptr = dlmalloc (size);
+
+  if (ptr)
+    {
+      msegmentptr seg = segment_holding (gm, ptr);
+
+      *code = add_segment_exec_offset (ptr, seg);
+    }
+
+  return ptr;
+}
+
+/* Release a chunk of memory allocated with ffi_closure_alloc.  If
+   FFI_CLOSURE_FREE_CODE is nonzero, the given address can be the
+   writable or the executable address given.  Otherwise, only the
+   writable address can be provided here.  */
+void
+ffi_closure_free (void *ptr)
+{
+#if FFI_CLOSURE_FREE_CODE
+  msegmentptr seg = segment_holding_code (gm, ptr);
+
+  if (seg)
+    ptr = sub_segment_exec_offset (ptr, seg);
+#endif
+
+  dlfree (ptr);
+}
+
+
+#if FFI_CLOSURE_TEST
+/* Do some internal sanity testing to make sure allocation and
+   deallocation of pages are working as intended.  */
+int main ()
+{
+  void *p[3];
+#define GET(idx, len) do { p[idx] = dlmalloc (len); printf ("allocated %zi for p[%i]\n", (len), (idx)); } while (0)
+#define PUT(idx) do { printf ("freeing p[%i]\n", (idx)); dlfree (p[idx]); } while (0)
+  GET (0, malloc_getpagesize / 2);
+  GET (1, 2 * malloc_getpagesize - 64 * sizeof (void*));
+  PUT (1);
+  GET (1, 2 * malloc_getpagesize);
+  GET (2, malloc_getpagesize / 2);
+  PUT (1);
+  PUT (0);
+  PUT (2);
+  return 0;
+}
+#endif /* FFI_CLOSURE_TEST */
+# else /* ! FFI_MMAP_EXEC_WRIT */
+
+/* On many systems, memory returned by malloc is writable and
+   executable, so just use it.  */
+
+#include <stdlib.h>
+
+void *
+ffi_closure_alloc (size_t size, void **code)
+{
+  if (!code)
+    return NULL;
+
+  return *code = malloc (size);
+}
+
+void
+ffi_closure_free (void *ptr)
+{
+  free (ptr);
+}
+
+# endif /* ! FFI_MMAP_EXEC_WRIT */
+#endif /* FFI_CLOSURES */
--- a/11
+++ b/11
@@ -1,3 +1,14 @@
+2011-02-09  Anthony Green <green@moxielogic.com>
+
+	* README: Mention Interix.
+
+2011-02-09  Jonathan Callen  <abcd@gentoo.org>
+
+	* configure.ac: Add Interix to win32/cygwin/mingw case.
+	* configure: Ditto.
+	* src/closures.c: Treat Interix like Cygwin, instead of as a
+	generic win32.
+
 2011-02-09  Anthony Green <green@moxielogic.com>

 	* testsuite/libffi.call/err_bad_typedef.c: Remove xfail.
--- a/1
+++ b/1
@@ -74,6 +74,7 @@ tested:
 | SPARC64      | Linux            |
 | SPARC64      | FreeBSD          |
 | X86          | FreeBSD          |
+| X86          | Interix          |
 | X86          | kFreeBSD         |
 | X86          | Linux            |
 | X86          | Mac OSX          |
--- a/aclocal.m4
+++ b/aclocal.m4
--- a/2
+++ b/2
@@ -12200,7 +12200,7 @@ case "$host" in
  i?86-*-freebsd* | i?86-*-openbsd*)
 	TARGET=X86_FREEBSD; TARGETDIR=x86
 	;;
-  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2*)
+  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2* | i?86-*-interix*)
 	TARGET=X86_WIN32; TARGETDIR=x86
 	# All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
 	# We must also check with_cross_host to decide if this is a native
--- a/configure.ac
+++ b/configure.ac
@@ -88,7 +88,7 @@ case "$host" in
  i?86-*-freebsd* | i?86-*-openbsd*)
 	TARGET=X86_FREEBSD; TARGETDIR=x86
 	;;
-  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2*)
+  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2* | i?86-*-interix*)
 	TARGET=X86_WIN32; TARGETDIR=x86
 	# All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
 	# We must also check with_cross_host to decide if this is a native
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -105,6 +105,7 @@ ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
 EGREP = @EGREP@
 EXEEXT = @EXEEXT@
+FFI_EXEC_TRAMPOLINE_TABLE = @FFI_EXEC_TRAMPOLINE_TABLE@
 FGREP = @FGREP@
 GREP = @GREP@
 HAVE_LONG_DOUBLE = @HAVE_LONG_DOUBLE@
@@ -192,6 +193,7 @@ psdir = @psdir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
+sys_symbol_underscore = @sys_symbol_underscore@
 sysconfdir = @sysconfdir@
 target = @target@
 target_alias = @target_alias@
--- a/man/Makefile.in
+++ b/man/Makefile.in
@@ -103,6 +103,7 @@ ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
 EGREP = @EGREP@
 EXEEXT = @EXEEXT@
+FFI_EXEC_TRAMPOLINE_TABLE = @FFI_EXEC_TRAMPOLINE_TABLE@
 FGREP = @FGREP@
 GREP = @GREP@
 HAVE_LONG_DOUBLE = @HAVE_LONG_DOUBLE@
@@ -190,6 +191,7 @@ psdir = @psdir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
+sys_symbol_underscore = @sys_symbol_underscore@
 sysconfdir = @sysconfdir@
 target = @target@
 target_alias = @target_alias@
--- a/patches/interix
+++ b/patches/interix
@@ -0,0 +1,95 @@
+Index: libffi/configure
+===================================================================
+--- libffi.orig/configure
+++ libffi/configure
+@@ -12200,7 +12200,7 @@ case "$host" in
+   i?86-*-freebsd* | i?86-*-openbsd*)
+ 	TARGET=X86_FREEBSD; TARGETDIR=x86
+ 	;;
+-  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2*)
+  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2* | i?86-*-interix*)
+ 	TARGET=X86_WIN32; TARGETDIR=x86
+ 	# All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
+ 	# We must also check with_cross_host to decide if this is a native
+Index: libffi/configure.ac
+===================================================================
+--- libffi.orig/configure.ac
+++ libffi/configure.ac
+@@ -88,7 +88,7 @@ case "$host" in
+   i?86-*-freebsd* | i?86-*-openbsd*)
+ 	TARGET=X86_FREEBSD; TARGETDIR=x86
+ 	;;
+-  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2*)
+  i?86-win32* | i?86-*-cygwin* | i?86-*-mingw* | i?86-*-os2* | i?86-*-interix*)
+ 	TARGET=X86_WIN32; TARGETDIR=x86
+ 	# All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
+ 	# We must also check with_cross_host to decide if this is a native
+Index: libffi/src/closures.c
+===================================================================
+--- libffi.orig/src/closures.c
+++ libffi/src/closures.c
+@@ -198,11 +198,11 @@ static int dlmalloc_trim(size_t) MAYBE_U
+ static size_t dlmalloc_usable_size(void*) MAYBE_UNUSED;
+ static void dlmalloc_stats(void) MAYBE_UNUSED;
+ 
+-#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX)
+ /* Use these for mmap and munmap within dlmalloc.c.  */
+ static void *dlmmap(void *, size_t, int, int, int, off_t);
+ static int dlmunmap(void *, size_t);
+-#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX) */
+ 
+ #define mmap dlmmap
+ #define munmap dlmunmap
+@@ -212,7 +212,7 @@ static int dlmunmap(void *, size_t);
+ #undef mmap
+ #undef munmap
+ 
+-#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX)
+ 
+ /* A mutex used to synchronize access to *exec* variables in this file.  */
+ static pthread_mutex_t open_temp_exec_file_mutex = PTHREAD_MUTEX_INITIALIZER;
+@@ -527,7 +527,7 @@ segment_holding_code (mstate m, char* ad
+ }
+ #endif
+ 
+-#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX) */
+ 
+ /* Allocate a chunk of memory with the given size.  Returns a pointer
+    to the writable address, and sets *CODE to the executable
+Index: libffi/ChangeLog
+===================================================================
+--- libffi.orig/ChangeLog
+++ libffi/ChangeLog
+@@ -1,5 +1,16 @@
+ 2011-02-09  Anthony Green <green@moxielogic.com>
+ 
+	* README: Mention Interix.
+
+2011-02-09  Jonathan Callen  <abcd@gentoo.org>
+
+	* configure.ac: Add Interix to win32/cygwin/mingw case.
+	* configure: Ditto.
+	* src/closures.c: Treat Interix like Cygwin, instead of as a
+	generic win32.
+
+2011-02-09  Anthony Green <green@moxielogic.com>
+
+ 	* testsuite/libffi.call/err_bad_typedef.c: Remove xfail.
+ 	* testsuite/libffi.call/err_bad_abi.c: Remove xfail.
+ 	* src/x86/ffi64.c (UNLIKELY, LIKELY): Define.
+Index: libffi/README
+===================================================================
+--- libffi.orig/README
+++ libffi/README
+@@ -74,6 +74,7 @@ tested:
+ | SPARC64      | Linux            |
+ | SPARC64      | FreeBSD          |
+ | X86          | FreeBSD          |
+| X86          | Interix          |
+ | X86          | kFreeBSD         |
+ | X86          | Linux            |
+ | X86          | Mac OSX          |
--- a/patches/series
+++ b/patches/series
@@ -14,3 +14,4 @@ hpux-mallinfo
 copyright-updates
 ios
 fix-xfails
+interix
--- a/src/closures.c
+++ b/src/closures.c
@@ -198,11 +198,11 @@ static int dlmalloc_trim(size_t) MAYBE_UNUSED;
 static size_t dlmalloc_usable_size(void*) MAYBE_UNUSED;
 static void dlmalloc_stats(void) MAYBE_UNUSED;

-#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX)
 /* Use these for mmap and munmap within dlmalloc.c.  */
 static void *dlmmap(void *, size_t, int, int, int, off_t);
 static int dlmunmap(void *, size_t);
-#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX) */

 #define mmap dlmmap
 #define munmap dlmunmap
@@ -212,7 +212,7 @@ static int dlmunmap(void *, size_t);
 #undef mmap
 #undef munmap

-#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__)
+#if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX)

 /* A mutex used to synchronize access to *exec* variables in this file.  */
 static pthread_mutex_t open_temp_exec_file_mutex = PTHREAD_MUTEX_INITIALIZER;
@@ -527,7 +527,7 @@ segment_holding_code (mstate m, char* addr)
 }
 #endif

-#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) */
+#endif /* !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX) */

 /* Allocate a chunk of memory with the given size.  Returns a pointer
   to the writable address, and sets *CODE to the executable
--- a/testsuite/Makefile.in
+++ b/testsuite/Makefile.in
@@ -80,6 +80,7 @@ ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
 EGREP = @EGREP@
 EXEEXT = @EXEEXT@
+FFI_EXEC_TRAMPOLINE_TABLE = @FFI_EXEC_TRAMPOLINE_TABLE@
 FGREP = @FGREP@
 GREP = @GREP@
 HAVE_LONG_DOUBLE = @HAVE_LONG_DOUBLE@
@@ -167,6 +168,7 @@ psdir = @psdir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
+sys_symbol_underscore = @sys_symbol_underscore@
 sysconfdir = @sysconfdir@
 target = @target@
 target_alias = @target_alias@