source: branches/BINUTILS_2-11-2_BRANCH/src/binutils/bfd/acinclude.m4@ 450

dnl See whether we need to use fopen-bin.h rather than fopen-same.h.
AC_DEFUN(BFD_BINARY_FOPEN,
[AC_REQUIRE([AC_CANONICAL_SYSTEM])
case "${host}" in
changequote(,)dnl
*-*-msdos* | *-*-go32* | *-*-mingw32* | *-*-cygwin* | *-*-windows* | *-*-os2*)
changequote([,])dnl
  AC_DEFINE(USE_BINARY_FOPEN, 1, [Use b modifier when opening binary files?]) ;;
esac])dnl

dnl Get a default for CC_FOR_BUILD to put into Makefile.
AC_DEFUN(BFD_CC_FOR_BUILD,
[# Put a plausible default for CC_FOR_BUILD in Makefile.
if test -z "$CC_FOR_BUILD"; then
  if test "x$cross_compiling" = "xno"; then
    CC_FOR_BUILD='$(CC)'
  else
    CC_FOR_BUILD=gcc
  fi
fi
AC_SUBST(CC_FOR_BUILD)
# Also set EXEEXT_FOR_BUILD.
if test "x$cross_compiling" = "xno"; then
  EXEEXT_FOR_BUILD='$(EXEEXT)'
else
  AC_CACHE_CHECK([for build system executable suffix], bfd_cv_build_exeext,
    [rm -f conftest*
     echo 'int main () { return 0; }' > conftest.c
     bfd_cv_build_exeext=
     ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
     for file in conftest.*; do
       case $file in
       *.c | *.o | *.obj | *.ilk | *.pdb) ;;
       *) bfd_cv_build_exeext=`echo $file | sed -e s/conftest//` ;;
       esac
     done
     rm -f conftest*
     test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no])
  EXEEXT_FOR_BUILD=""
  test x"${bfd_cv_build_exeext}" != xno && EXEEXT_FOR_BUILD=${bfd_cv_build_exeext}
fi
AC_SUBST(EXEEXT_FOR_BUILD)])dnl

dnl See whether we need a declaration for a function.
AC_DEFUN(BFD_NEED_DECLARATION,
[AC_MSG_CHECKING([whether $1 must be declared])
AC_CACHE_VAL(bfd_cv_decl_needed_$1,
[AC_TRY_COMPILE([
#include <stdio.h>
#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>