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42 lines
997 B
Plaintext
42 lines
997 B
Plaintext
# serial 1
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AC_DEFUN([mfx_PROG_CPPFLAGS], [
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AC_MSG_CHECKING([whether the C preprocessor needs special flags])
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AC_LANG_CONFTEST([AC_LANG_PROGRAM(
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[[#include <limits.h>
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#if (32767 >= 4294967295ul) || (65535u >= 4294967295ul)
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# include "your C preprocessor is broken 1"
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#elif (0xffffu == 0xfffffffful)
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# include "your C preprocessor is broken 2"
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#elif (32767 >= ULONG_MAX) || (65535u >= ULONG_MAX)
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# include "your C preprocessor is broken 3"
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#endif
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]], [[ ]]
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)])
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mfx_save_CPPFLAGS=$CPPFLAGS
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mfx_tmp=ERROR
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for mfx_arg in "" -no-cpp-precomp
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do
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CPPFLAGS="$mfx_arg $mfx_save_CPPFLAGS"
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_AC_COMPILE_IFELSE([],
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[mfx_tmp=$mfx_arg
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break])
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done
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CPPFLAGS=$mfx_save_CPPFLAGS
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rm -f conftest.$ac_ext conftest.$ac_objext
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case x$mfx_tmp in
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x)
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AC_MSG_RESULT([none needed]) ;;
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xERROR)
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AC_MSG_RESULT([ERROR])
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AC_MSG_ERROR([your C preprocessor is broken - for details see config.log])
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;;
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*)
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AC_MSG_RESULT([$mfx_tmp])
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CPPFLAGS="$mfx_tmp $CPPFLAGS"
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;;
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esac
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])# mfx_PROG_CPPFLAGS
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