On 09/08/2014 07:29 AM, Eric Blake wrote:
Maybe it's as simple as patching autoconf to change the message
Thanks, good idea. I installed the attached.
>From db9a848f1042ae17ddbf85ba66a970998746a0d0 Mon Sep 17 00:00:00 2001 From: Paul Eggert <eggert@xxxxxxxxxxx> Date: Mon, 8 Sep 2014 09:25:08 -0700 Subject: [PATCH] autoconf: clarify "checking" message for GNU-compatible compiliers Problem reported by Bastien Chevreux in: http://lists.gnu.org/archive/html/autoconf/2014-09/msg00022.html and idea for fix by Eric Blake in: http://lists.gnu.org/archive/html/autoconf/2014-09/msg00025.html * doc/autoconf.texi (Running the Preprocessor) (Present But Cannot Be Compiled): Adjust examples to match current behavior. * lib/autoconf/lang.m4 (_AC_LANG_COMPILER_GNU): Say "checking whether the compiler supports GNU C", not "checking whether we are using the GNU C compiler". --- doc/autoconf.texi | 23 +++-------------------- lib/autoconf/lang.m4 | 2 +- 2 files changed, 4 insertions(+), 21 deletions(-) diff --git a/doc/autoconf.texi b/doc/autoconf.texi index 83e6643..ebb0a01 100644 --- a/doc/autoconf.texi +++ b/doc/autoconf.texi @@ -9261,7 +9261,7 @@ checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o -checking whether we are using the GNU C compiler... yes +checking whether the compiler supports GNU C... yes checking whether gcc accepts -g... yes checking for gcc option to enable C11 features... -std=gnu11 checking how to run the C preprocessor... gcc -std=gnu11 -E @@ -25976,32 +25976,15 @@ checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o -checking whether we are using the GNU C compiler... yes +checking whether the compiler supports GNU C... yes checking whether gcc accepts -g... yes checking for gcc option to enable C11 features... -std=gnu11 -checking how to run the C preprocessor... gcc -std=gnu11 -E -checking for grep that handles long lines and -e... /usr/bin/grep -checking for egrep... /usr/bin/grep -E -checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes -checking for stdlib.h... yes -checking for string.h... yes -checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes -checking pi.h usability... no -checking pi.h presence... yes -configure: WARNING: pi.h: present but cannot be compiled -configure: WARNING: pi.h: check for missing prerequisite headers? -configure: WARNING: pi.h: see the Autoconf documentation -configure: WARNING: pi.h: section "Present But Cannot Be Compiled" -configure: WARNING: pi.h: proceeding with the compiler's result -configure: WARNING: ## --------------------------------------- ## -configure: WARNING: ## Report this to bug-example@@example.org ## -configure: WARNING: ## --------------------------------------- ## checking for pi.h... no @end smallexample @@ -26025,7 +26008,7 @@ checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o -checking whether we are using the GNU C compiler... yes +checking whether the compiler supports GNU C... yes checking whether gcc accepts -g... yes checking for gcc option to enable C11 features... -std=gnu11 checking for number.h... yes diff --git a/lib/autoconf/lang.m4 b/lib/autoconf/lang.m4 index 434a0e9..318f621 100644 --- a/lib/autoconf/lang.m4 +++ b/lib/autoconf/lang.m4 @@ -343,7 +343,7 @@ AC_DEFUN([AC_LANG_COMPILER_REQUIRE], # some Fortran compilers (e.g., SGI) might consider it's a # continuation line, and warn instead of reporting an error. m4_define([_AC_LANG_COMPILER_GNU], -[AC_CACHE_CHECK([whether we are using the GNU _AC_LANG compiler], +[AC_CACHE_CHECK([whether the compiler supports GNU _AC_LANG], [ac_cv_[]_AC_LANG_ABBREV[]_compiler_gnu], [_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[#ifndef __GNUC__ choke me -- 1.9.3
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