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Posted to dev@qpid.apache.org by "Andrew Stitcher (JIRA)" <ji...@apache.org> on 2011/06/07 20:49:58 UTC
[jira] [Commented] (QPID-3295) Under some conditions autoconf
incorrectly detects that gcc doesn't support -Werror
[ https://issues.apache.org/jira/browse/QPID-3295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045588#comment-13045588 ]
Andrew Stitcher commented on QPID-3295:
---------------------------------------
Configure.ac uses the gl_COMPILER_FLAGS macro to test whether the compiler accepts a particular flag. However the program it uses to test compile has an unused variable in it.
The program is:
int main() {
int x;
;
return 0;
}
when compiled with -Wall -Werror this program reports an error and so autoconf thinks that -Werror isn't a valid flags for gcc
> Under some conditions autoconf incorrectly detects that gcc doesn't support -Werror
> -----------------------------------------------------------------------------------
>
> Key: QPID-3295
> URL: https://issues.apache.org/jira/browse/QPID-3295
> Project: Qpid
> Issue Type: Bug
> Affects Versions: 0.8, 0.10
> Reporter: Andrew Stitcher
> Assignee: Andrew Stitcher
> Labels: autoconf, gcc
>
> If CFLAGS or CXXFLAGS contains "-Wall" when running configure, autoconf incorrectly detects that gcc doesn't support -Werror
> This is problematic because it is an important aspect of our policy that there should be no compiler warnings, and this bug stops this being enforced.
> Notably, the fedora package build has this issue and has been shipping with some unnoticed warnings for a while.
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