configure: Split out configure.host

Split out the host case statement to a separate file, so that
we don't have to regenerate configure.in for changes therein.

configure.host

@@ -0,0 +1,193 @@
+# configure.host
+#
+# This shell script handles all host based configuration for libffi.
+#
+
+# THIS TABLE IS SORTED.  KEEP IT THAT WAY.
+case "${host}" in
+  aarch64*-*-*)
+	TARGET=AARCH64; TARGETDIR=aarch64
+	;;
+
+  alpha*-*-*)
+	TARGET=ALPHA; TARGETDIR=alpha;
+	# Support 128-bit long double, changeable via command-line switch.
+	HAVE_LONG_DOUBLE='defined(__LONG_DOUBLE_128__)'
+	;;
+
+  arc*-*-*)
+	TARGET=ARC; TARGETDIR=arc
+	;;
+
+  arm*-*-*)
+	TARGET=ARM; TARGETDIR=arm
+	;;
+
+  avr32*-*-*)
+	TARGET=AVR32; TARGETDIR=avr32
+	;;
+
+  bfin*)
+	TARGET=BFIN; TARGETDIR=bfin
+	;;
+
+  cris-*-*)
+	TARGET=LIBFFI_CRIS; TARGETDIR=cris
+	;;
+
+  frv-*-*)
+	TARGET=FRV; TARGETDIR=frv
+	;;
+
+  hppa*-*-linux* | parisc*-*-linux* | hppa*-*-openbsd*)
+	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* | i?86-*-interix* \
+  | x86_64-*-cygwin* | x86_64-*-mingw*)
+	TARGETDIR=x86
+	if test $ac_cv_sizeof_size_t = 4; then
+	  TARGET=X86_WIN32
+	else
+	  TARGET=X86_WIN64
+	fi
+	# All mingw/cygwin/win32 builds require -no-undefined for sharedlib.
+	# We must also check with_cross_host to decide if this is a native
+	# or cross-build and select where to install dlls appropriately.
+	if test -n "$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* | x86_64-*-darwin*)
+	TARGET=X86_DARWIN; TARGETDIR=x86
+	;;
+
+  i?86-*-* | x86_64-*-* | amd64-*)
+	TARGETDIR=x86
+	if test $ac_cv_sizeof_size_t = 4; then
+	  case "$host" in
+	    *-gnux32)
+	      TARGET=X86_64
+	      ;;
+	    *)
+	      TARGET=X86
+	      ;;
+          esac
+	else
+	  TARGET=X86_64;
+	fi
+	;;
+
+  ia64*-*-*)
+	TARGET=IA64; TARGETDIR=ia64
+	;;
+
+  m32r*-*-*)
+	TARGET=M32R; TARGETDIR=m32r
+	;;
+
+  m68k-*-*)
+	TARGET=M68K; TARGETDIR=m68k
+	;;
+
+  m88k-*-*)
+	TARGET=M88K; TARGETDIR=m88k
+	;;
+
+  microblaze*-*-*)
+	TARGET=MICROBLAZE; TARGETDIR=microblaze
+	;;
+
+  moxie-*-*)
+	TARGET=MOXIE; TARGETDIR=moxie
+	;;
+
+  metag-*-*)
+	TARGET=METAG; TARGETDIR=metag
+	;;
+
+  mips-sgi-irix5.* | mips-sgi-irix6.* | mips*-*-rtems*)
+	TARGET=MIPS; TARGETDIR=mips
+	;;
+  mips*-*linux* | mips*-*-openbsd*)
+	# Support 128-bit long double for NewABI.
+	HAVE_LONG_DOUBLE='defined(__mips64)'
+	TARGET=MIPS; TARGETDIR=mips
+	;;
+
+  nios2*-linux*)
+	TARGET=NIOS2; TARGETDIR=nios2
+	;;
+
+  or1k*-linux*)
+	TARGET=OR1K; TARGETDIR=or1k
+	;;
+
+  powerpc*-*-linux* | powerpc-*-sysv*)
+	TARGET=POWERPC; TARGETDIR=powerpc
+	HAVE_LONG_DOUBLE_VARIANT=1
+	;;
+  powerpc-*-amigaos*)
+	TARGET=POWERPC; TARGETDIR=powerpc
+	;;
+  powerpc-*-beos*)
+	TARGET=POWERPC; TARGETDIR=powerpc
+	;;
+  powerpc-*-darwin* | powerpc64-*-darwin*)
+	TARGET=POWERPC_DARWIN; TARGETDIR=powerpc
+	;;
+  powerpc-*-aix* | rs6000-*-aix*)
+	TARGET=POWERPC_AIX; TARGETDIR=powerpc
+	;;
+  powerpc-*-freebsd* | powerpc-*-openbsd*)
+	TARGET=POWERPC_FREEBSD; TARGETDIR=powerpc
+	HAVE_LONG_DOUBLE_VARIANT=1
+	;;
+  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
+	;;
+
+  tile*-*)
+        TARGET=TILE; TARGETDIR=tile
+        ;;
+
+  vax-*-*)
+	TARGET=VAX; TARGETDIR=vax
+	;;
+
+  xtensa*-*)
+	TARGET=XTENSA; TARGETDIR=xtensa
+	;;
+esac