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Autoconf Archive branch, master, updated. v2010.06.04-7-g0728dab
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Autoconf Archive branch, master, updated. v2010.06.04-7-g0728dab |
Date: |
Wed, 16 Jun 2010 07:00:15 +0200 |
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- Log -----------------------------------------------------------------
commit 0728dab771b2a4da8032d5f0ade8870add680b39
Author: Philip Allison <address@hidden>
Date: Tue Jun 15 15:27:35 2010 +0200
AX_PTHREAD: fix compiler warning in AC_TRY_LINK test program
The test program generated by AX_PTHREAD's AC_TRY_LINK invocation generates
a
compiler warning (on Linux, using GCC 4). When building with "-Wall
-Werror" in
CFLAGS, as done during development to catch unexpected warnings, this turns
into a compiler error; hence, all of the AC_TRY_LINK invocations fail, and
the
macro fails to detect any suitable compiler/linker flags for pthreads usage.
A sample from config.log showing the error follows.
configure:16038: result: no
configure:15936: checking whether pthreads work without any flags
configure:16029: gcc -o conftest -O3 -g -Wall -Werror -pipe
-fvisibility=hidden -Wl,-O1 -Wl,--as-needed conftest.c >&5
cc1: warnings being treated as errors
conftest.c: In function 'main':
conftest.c:31: error: 'th' is used uninitialized in this function
This patch fixes the issue by placing pthread_create before pthread_join in
the
test program.
-----------------------------------------------------------------------
Summary of changes:
NEWS | 2 ++
m4/ax_pthread.m4 | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)
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