51 lines
1.9 KiB
Text
51 lines
1.9 KiB
Text
# AC_LANG_STDCALL_FUNC_LINK_TRY(FUNCTION, SIGNATURE)
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# -------------------------------
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# Produce a source which links correctly iff the FUNCTION exists.
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AC_DEFUN([AC_LANG_STDCALL_FUNC_LINK_TRY],
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[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
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# AC_CHECK_STDCALL_FUNC(FUNCTION, SIGNATURE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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# -----------------------------------------------------------------
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AC_DEFUN([AC_CHECK_STDCALL_FUNC],
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[AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$1])dnl
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AC_CACHE_CHECK([for $1], ac_var,
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[AC_LINK_IFELSE([AC_LANG_STDCALL_FUNC_LINK_TRY([$1],[$2])],
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[AS_VAR_SET(ac_var, yes)],
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[AS_VAR_SET(ac_var, no)])])
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AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl
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AS_VAR_POPDEF([ac_var])dnl
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])# AC_CHECK_FUNC
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# AC_LANG_STDCALL_FUNC_LINK_TRY(C)(FUNCTION, SIGNATURE)
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# ----------------------------------
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# Don't include <ctype.h> because on OSF/1 3.0 it includes
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# <sys/types.h> which includes <sys/select.h> which contains a
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# prototype for select. Similarly for bzero.
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m4_define([AC_LANG_STDCALL_FUNC_LINK_TRY(C)],
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[AC_LANG_PROGRAM(
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[/* System header to define __stub macros and hopefully few prototypes,
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which can conflict with char __stdcall $1 ( $2 ) below. */
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#include <assert.h>
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/* Override any gcc2 internal prototype to avoid an error. */
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#ifdef __cplusplus
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extern "C"
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#endif
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/* We use char because int might match the return type of a gcc2
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builtin and then its argument prototype would still apply. */
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char __stdcall $1 ( $2 );
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char (*f) ( $2 );
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],
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[/* The GNU C library defines this for functions which it implements
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to always fail with ENOSYS. Some functions are actually named
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something starting with __ and the normal name is an alias. */
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#if defined (__stub_$1) || defined (__stub___$1)
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choke me
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#else
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f = $1;
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#endif
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])])
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# AC_LANG_STDCALL_FUNC_LINK_TRY(C++)(FUNCTION)
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# ------------------------------------
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m4_copy([AC_LANG_STDCALL_FUNC_LINK_TRY(C)], [AC_LANG_STDCALL_FUNC_LINK_TRY(C++)])
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