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https://github.com/ceph/ceph
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ac044812d0
Selects __PRETTY_FUNCTION__ or __func__. Linux assumes GNU, and chooses
__PRETTY_FUNCTION__ if gcc/g++ versions are favorable.
This also includes a fix in ax_c_var_func.m4:
AC_TRY_COMPILE will wrap the test in main{}, and then GCC will complain
about nested functions. Just use the original main{} body.
diff --git a/m4/ax_c_var_func.m4 b/m4/ax_c_var_func.m4
index 0ad7d2b..8b57563 100644
--- a/m4/ax_c_var_func.m4
+++ b/m4/ax_c_var_func.m4
@@ -57,9 +57,9 @@ AC_DEFUN([AX_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) )
Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
67 lines
2.6 KiB
Plaintext
67 lines
2.6 KiB
Plaintext
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_c_var_func.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_C_VAR_FUNC
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#
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# DESCRIPTION
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#
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# This macro tests if the C complier supports the C9X standard __func__
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# indentifier.
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#
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# The new C9X standard for the C language stipulates that the identifier
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# __func__ shall be implictly declared by the compiler as if, immediately
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# following the opening brace of each function definition, the declaration
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#
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# static const char __func__[] = "function-name";
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#
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# appeared, where function-name is the name of the function where the
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# __func__ identifier is used.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Christopher Currie <christopher@currie.com>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Archive. When you make and distribute a
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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#serial 5
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AU_ALIAS([AC_C_VAR_FUNC], [AX_C_VAR_FUNC])
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AC_DEFUN([AX_C_VAR_FUNC],
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[AC_REQUIRE([AC_PROG_CC])
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AC_CACHE_CHECK(whether $CC recognizes __func__, ac_cv_c_var_func,
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AC_TRY_COMPILE(,
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[
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char *s = __func__;
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],
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AC_DEFINE(HAVE_FUNC,,
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[Define if the C complier supports __func__]) ac_cv_c_var_func=yes,
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ac_cv_c_var_func=no) )
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])dnl
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