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[patch #8081] AX_PTHREAD.m4 not setting PTHREAD_LIBS to -pthread for gcc
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From: |
Daniel Richard G. |
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Subject: |
[patch #8081] AX_PTHREAD.m4 not setting PTHREAD_LIBS to -pthread for gcc 4.7.2 |
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Date: |
Wed, 19 Jun 2013 16:16:07 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko) Ubuntu Chromium/25.0.1364.160 Chrome/25.0.1364.160 Safari/537.22 |
Follow-up Comment #1, patch #8081 (project autoconf-archive):
As far as I could tell, the issue came down to not using PTHREAD_CFLAGS at
link time. This is why the comment on lines 21-23 of m4/ax_pthread.m4 is
there.
Flags like -pthread need to be used at both the compile step and the link
step, and rather than duplicate these flags between PTHREAD_CFLAGS and
PTHREAD_LIBS, it makes more sense to keep them in PTHREAD_CFLAGS, have
PTHREAD_LIBS contain bits that are only needed at link time (like -lfoo
directives), and use both variables when linking.
(I don't rule out the possibility of there being an actual problem here, but I
haven't seen a clear indication of that yet.)
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