source: vendor/gcc/current/libffi/configure.in

dnl Process this with autoconf to create configure
AC_INIT(fficonfig.h.in)
AM_CONFIG_HEADER(fficonfig.h)

# This works around the fact that libtool configuration may change LD
# for this particular configuration, but some shells, instead of
# keeping the changes in LD private, export them just because LD is
# exported.
ORIGINAL_LD_FOR_MULTILIBS=$LD

dnl Default to --enable-multilib
AC_ARG_ENABLE(multilib,
[  --enable-multilib       build many library versions (default)],
[case "${enableval}" in
  yes) multilib=yes ;;
  no)  multilib=no ;;
  *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
 esac], [multilib=yes])dnl

dnl We may get other options which we don't document:
dnl --with-target-subdir, --with-multisrctop, --with-multisubdir

if test "${srcdir}" = "."; then
  if test "${with_target_subdir}" != "."; then
    libffi_basedir="${with_multisrctop}../"
  else
    libffi_basedir="${with_multisrctop}"
  fi
else
  libffi_basedir=
fi
AC_SUBST(libffi_basedir)
AC_CONFIG_AUX_DIR(${libffi_basedir}..)

AC_CANONICAL_HOST

AM_PROG_LIBTOOL

AM_INIT_AUTOMAKE(libffi,2.00-beta,no-define)

AC_EXEEXT
AM_MAINTAINER_MODE

AC_PROG_CC
AC_PROG_LIBTOOL

TARGETDIR="unknown"
case "$host" in
mips-sgi-irix5.* | mips-sgi-irix6.*) TARGET=MIPS; TARGETDIR=mips;;
i*86-*-linux*) TARGET=X86; TARGETDIR=x86;;
i*86-*-sco3.2v5*) TARGET=X86; TARGETDIR=x86;;
i*86-*-solaris*) TARGET=X86; TARGETDIR=x86;;
i*86-*-beos*) TARGET=X86; TARGETDIR=x86;;
i*86-*-freebsd*) TARGET=X86; TARGETDIR=x86;;
i*86-*-netbsdelf*) TARGET=X86; TARGETDIR=x86;;
i*86-*-win32*) TARGET=X86_WIN32; TARGETDIR=x86;;
i*86-*-cygwin*) TARGET=X86_WIN32; TARGETDIR=x86;;
i*86-*-mingw*) TARGET=X86_WIN32; TARGETDIR=x86;;
sparc-sun-4*) TARGET=SPARC; TARGETDIR=sparc;;
sparc*-sun-*) TARGET=SPARC; TARGETDIR=sparc;;
sparc-*-linux* | sparc-*-netbsdelf*) TARGET=SPARC; TARGETDIR=sparc;;
sparc64-*-linux* | sparc64-*-netbsd*) TARGET=SPARC; TARGETDIR=sparc;;
alpha*-*-linux* | alpha*-*-osf* | alpha*-*-freebsd* | alpha*-*-netbsd*) TARGET=ALPHA; TARGETDIR=alpha;;
ia64*-*-*) TARGET=IA64; TARGETDIR=ia64;;
m68k-*-linux*) TARGET=M68K; TARGETDIR=m68k;;
mips64*-*);;
mips*-*-linux*) TARGET=MIPS_LINUX; 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*) TARGET=POWERPC_AIX; TARGETDIR=powerpc;;
rs6000-*-aix*) TARGET=POWERPC_AIX; TARGETDIR=powerpc;;
arm*-*-linux-*) TARGET=ARM; TARGETDIR=arm;;
s390-*-linux-*) TARGET=S390; TARGETDIR=s390;;
s390x-*-linux-*) TARGET=S390; TARGETDIR=s390;;
x86_64-*-linux*) TARGET=X86_64; TARGETDIR=x86;;
sh-*-linux* | sh[[34]]*-*-linux*) TARGET=SH; TARGETDIR=sh;;
esac

if test $TARGETDIR = unknown; then
  AC_ERROR("libffi has not been ported to $host.")
fi

AM_CONDITIONAL(MIPS_GCC, test ${TARGET}${ac_cv_prog_gcc} = MIPSyes)
AM_CONDITIONAL(MIPS_SGI, test ${TARGET}${ac_cv_prog_gcc} = MIPSno)
AM_CONDITIONAL(MIPS_LINUX, test x$TARGET = xMIPS_LINUX)
AM_CONDITIONAL(SPARC, test x$TARGET = xSPARC)
AM_CONDITIONAL(X86, test x$TARGET = xX86)
AM_CONDITIONAL(X86_WIN32, test x$TARGET = xX86_WIN32)
AM_CONDITIONAL(ALPHA, test x$TARGET = xALPHA)
AM_CONDITIONAL(IA64, test x$TARGET = xIA64)
AM_CONDITIONAL(M68K, test x$TARGET = xM68K)
AM_CONDITIONAL(POWERPC, test x$TARGET = xPOWERPC)
AM_CONDITIONAL(POWERPC_AIX, test x$TARGET = xPOWERPC_AIX)
AM_CONDITIONAL(POWERPC_DARWIN, test x$TARGET = xPOWERPC_DARWIN)
AM_CONDITIONAL(ARM, test x$TARGET = xARM)
AM_CONDITIONAL(S390, test x$TARGET = xS390)
AM_CONDITIONAL(X86_64, test x$TARGET = xX86_64)
AM_CONDITIONAL(SH, test x$TARGET = xSH)

if test x$TARGET = xMIPS_LINUX; then
  TARGET=MIPS
fi

AC_HEADER_STDC
AC_CHECK_FUNCS(memcpy)
AC_FUNC_ALLOCA

dnl AC_CHECK_SIZEOF(char)
AC_COMPILE_CHECK_SIZEOF(short)
AC_COMPILE_CHECK_SIZEOF(int)
AC_COMPILE_CHECK_SIZEOF(long)
AC_COMPILE_CHECK_SIZEOF(long long)
AC_COMPILE_CHECK_SIZEOF(float)
AC_COMPILE_CHECK_SIZEOF(double)
AC_COMPILE_CHECK_SIZEOF(long double)

AC_COMPILE_CHECK_SIZEOF(void *)
AC_C_BIGENDIAN_CROSS

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

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)
  fi)

AC_ARG_ENABLE(structs,
[  --disable-structs       omit code for struct support],
  if test "$enable_structs" = "no"; then
    AC_DEFINE(FFI_NO_STRUCTS)
  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)
  fi)

AC_ARG_ENABLE(purify-safety,
[  --enable-purify-safety  purify-safe mode],
  if test "$enable_purify_safety" = "yes"; then
    AC_DEFINE(USING_PURIFY)
  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
toolexeclibdir=$toolexeclibdir/`$CC -print-multi-os-directory`
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)

if test "${multilib}" = "yes"; then
  multilib_arg="--enable-multilib"
else
  multilib_arg=
fi

AC_OUTPUT(include/Makefile include/ffi.h Makefile,
[
if test -n "$CONFIG_FILES"; then
   LD="${ORIGINAL_LD_FOR_MULTILIBS}"
   ac_file=Makefile . ${srcdir}/${libffi_basedir}../config-ml.in
fi
],
srcdir=${srcdir}
host=${host}
target=${target}
with_multisubdir=${with_multisubdir}
ac_configure_args="${multilib_arg} ${ac_configure_args}"
CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
libffi_basedir=${libffi_basedir}
CC="${CC}"
DEFS="$DEFS"
ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"
test ! -d include && mkdir include
test ! -f include/fficonfig.h && cp fficonfig.h include/fficonfig.h
if cmp -s fficonfig.h include/fficonfig.h 2>/dev/null; then 
        echo fficonfig.h unchanged
else
        echo Moving fficonfig.h to include/fficonfig.h
        cp fficonfig.h include/fficonfig.h
fi
)

# Make target subdirectories if required.
test -d src || mkdir src
test -d src/${TARGETDIR} || mkdir src/${TARGETDIR}