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| author | Yang Tse <yangsita@gmail.com> | 2009-05-01 02:03:43 +0000 |
|---|---|---|
| committer | Yang Tse <yangsita@gmail.com> | 2009-05-01 02:03:43 +0000 |
| commit | dcdabb9ebed2052500e77fb529b744c2ceb60e50 (patch) | |
| tree | a9864c9d70e2578f106cd7b45a3e20c65e1bd974 /acinclude.m4 | |
| parent | c2ae8f0059d116edadbfe1120b1c0455adba601f (diff) | |
| download | c-ares-dcdabb9ebed2052500e77fb529b744c2ceb60e50.tar.gz c-ares-dcdabb9ebed2052500e77fb529b744c2ceb60e50.tar.bz2 c-ares-dcdabb9ebed2052500e77fb529b744c2ceb60e50.zip | |
Check definition of _XOPEN_SOURCE_EXTENDED with the compiler
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 8cadce1..e5d96b2 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -96,6 +96,44 @@ CURL_DEF_TOKEN $1 ]) +dnl CURL_CHECK_DEF_CC (SYMBOL, [INCLUDES], [SILENT]) +dnl ------------------------------------------------- +dnl Use the C compiler to find out only if the given symbol is defined +dnl or not, this can not find out its expansion. This macro will not use +dnl default includes even if no INCLUDES argument is given. This macro +dnl will run silently when invoked with three arguments. + +AC_DEFUN([CURL_CHECK_DEF_CC], [ + AS_VAR_PUSHDEF([ac_HaveDef], [curl_cv_have_def_$1])dnl + ifelse($3,,[AC_MSG_CHECKING([for compiler definition of $1])]) + AC_COMPILE_IFELSE([ + AC_LANG_SOURCE( +ifelse($2,,,[$2])[[ +int main (void) +{ +#ifdef $1 + return 0; +#else + force compilation error +#endif +} + ]]) + ],[ + tst_symbol_defined="yes" + ],[ + tst_symbol_defined="no" + ]) + if test "$tst_symbol_defined" = "yes"; then + AS_VAR_SET(ac_HaveDef, yes) + ifelse($3,,[AC_MSG_RESULT([yes])]) + else + AS_VAR_SET(ac_HaveDef, no) + ifelse($3,,[AC_MSG_RESULT([no])]) + fi + AS_VAR_POPDEF([ac_HaveDef])dnl +]) + + dnl CARES_CHECK_AIX_ALL_SOURCE dnl ------------------------------------------------- dnl Provides a replacement of traditional AC_AIX with |