git://cygwin.com / cygwin-apps / cygutils.git / blame
| Commit | Line | Data |
|---|---|---|
| d2b03e6a CW |
1 | # AC_LANG_STDCALL_FUNC_LINK_TRY(FUNCTION, SIGNATURE) |
| 2 | # ------------------------------- | |
| 3 | # Produce a source which links correctly iff the FUNCTION exists. | |
| 4 | AC_DEFUN([AC_LANG_STDCALL_FUNC_LINK_TRY], | |
| 5 | [_AC_LANG_DISPATCH([$0], _AC_LANG, $@)]) | |
| 6 | ||
| 7 | # AC_CHECK_STDCALL_FUNC(FUNCTION, SIGNATURE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) | |
| 8 | # ----------------------------------------------------------------- | |
| 9 | AC_DEFUN([AC_CHECK_STDCALL_FUNC], | |
| 10 | [AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$1])dnl | |
| 11 | AC_CACHE_CHECK([for $1], ac_var, | |
| 12 | [AC_LINK_IFELSE([AC_LANG_STDCALL_FUNC_LINK_TRY([$1],[$2])], | |
| 13 | [AS_VAR_SET(ac_var, yes)], | |
| 14 | [AS_VAR_SET(ac_var, no)])]) | |
| 15 | AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl | |
| 16 | AS_VAR_POPDEF([ac_var])dnl | |
| 17 | ])# AC_CHECK_FUNC | |
| 18 | ||
| 19 | # AC_LANG_STDCALL_FUNC_LINK_TRY(C)(FUNCTION, SIGNATURE) | |
| 20 | # ---------------------------------- | |
| 21 | # Don't include <ctype.h> because on OSF/1 3.0 it includes | |
| 22 | # <sys/types.h> which includes <sys/select.h> which contains a | |
| 23 | # prototype for select. Similarly for bzero. | |
| 24 | m4_define([AC_LANG_STDCALL_FUNC_LINK_TRY(C)], | |
| 25 | [AC_LANG_PROGRAM( | |
| 26 | [/* System header to define __stub macros and hopefully few prototypes, | |
| 27 | which can conflict with char __stdcall $1 ( $2 ) below. */ | |
| 28 | #include <assert.h> | |
| 29 | /* Override any gcc2 internal prototype to avoid an error. */ | |
| 30 | #ifdef __cplusplus | |
| 31 | extern "C" | |
| 32 | #endif | |
| 33 | /* We use char because int might match the return type of a gcc2 | |
| 34 | builtin and then its argument prototype would still apply. */ | |
| 35 | char __stdcall $1 ( $2 ); | |
| 36 | char (*f) ( $2 ); | |
| 37 | ], | |
| 38 | [/* The GNU C library defines this for functions which it implements | |
| 39 | to always fail with ENOSYS. Some functions are actually named | |
| 40 | something starting with __ and the normal name is an alias. */ | |
| 41 | #if defined (__stub_$1) || defined (__stub___$1) | |
| 42 | choke me | |
| 43 | #else | |
| 44 | f = $1; | |
| 45 | #endif | |
| 46 | ])]) | |
| 47 | ||
| 48 | # AC_LANG_STDCALL_FUNC_LINK_TRY(C++)(FUNCTION) | |
| 49 | # ------------------------------------ | |
| 50 | m4_copy([AC_LANG_STDCALL_FUNC_LINK_TRY(C)], [AC_LANG_STDCALL_FUNC_LINK_TRY(C++)]) | |
| 51 |