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AC_C_VAR_FUNC
This macro tests if the C complier supports the C9X standard __func__ indentifier.
The new C9X standard for the C language stipulates that the identifier __func__ shall be implictly declared by the compiler as if, immediately following the opening brace of each function definition, the declaration
static const char __func__[] = "function-name";
appeared, where function-name is the name of the function where the __func__ identifier is used.
Christopher Currie <christopher@currie.com>
2000-07-19
AC_DEFUN([AC_C_VAR_FUNC],
[AC_REQUIRE([AC_PROG_CC])
AC_CACHE_CHECK(whether $CC recognizes __func__, ac_cv_c_var_func,
AC_TRY_COMPILE(,
[int main() {
char *s = __func__;
}],
AC_DEFINE(HAVE_FUNC,,
[Define if the C complier supports __func__]) ac_cv_c_var_func=yes,
ac_cv_c_var_func=no) )
])dnl