[SCM] GNU Autoconf source repository branch, master, updated. v2.69-128-g9d1564f

[Paul Eggert]

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- Log -----------------------------------------------------------------
commit 9d1564fc5b5862875cc956d900dcc8b1dca7c383
Author: Paul Eggert <***@cs.ucla.edu>
Date: Mon Sep 8 09:25:08 2014 -0700

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".

-----------------------------------------------------------------------

Summary of changes:
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


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