diff options
Diffstat (limited to 'config/c-compiler.m4')
| -rw-r--r-- | config/c-compiler.m4 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/config/c-compiler.m4 b/config/c-compiler.m4 index 780e906eccd..d3562d6feee 100644 --- a/config/c-compiler.m4 +++ b/config/c-compiler.m4 @@ -381,6 +381,28 @@ fi])# PGAC_CHECK_BUILTIN_FUNC +# PGAC_CHECK_BUILTIN_FUNC_PTR +# ----------------------- +# Like PGAC_CHECK_BUILTIN_FUNC, except that the function is assumed to +# return a pointer type, and the argument(s) should be given literally. +# This handles some cases that PGAC_CHECK_BUILTIN_FUNC doesn't. +AC_DEFUN([PGAC_CHECK_BUILTIN_FUNC_PTR], +[AC_CACHE_CHECK(for $1, pgac_cv$1, +[AC_LINK_IFELSE([AC_LANG_PROGRAM([ +void * +call$1(void) +{ + return $1($2); +}], [])], +[pgac_cv$1=yes], +[pgac_cv$1=no])]) +if test x"${pgac_cv$1}" = xyes ; then +AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE$1]), 1, + [Define to 1 if your compiler understands $1.]) +fi])# PGAC_CHECK_BUILTIN_FUNC_PTR + + + # PGAC_PROG_VARCC_VARFLAGS_OPT # ---------------------------- # Given a compiler, variable name and a string, check if the compiler |