Bug 1160845 - udf_example.c couldn't compile
Summary: udf_example.c couldn't compile
Alias: None
Product: Fedora
Classification: Fedora
Component: mariadb
Version: 21
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Jan Staněk
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2014-11-05 19:07 UTC by Mikhail
Modified: 2014-12-06 09:59 UTC (History)
4 users (show)

Fixed In Version: mariadb-10.0.14-8.fc21
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-12-06 09:59:27 UTC
Type: Bug

Attachments (Terms of Use)
Upstream patch (899 bytes, patch)
2014-11-20 11:43 UTC, Jan Staněk
no flags Details | Diff

Description Mikhail 2014-11-05 19:07:57 UTC
Description of problem:
[mikhail@localhost udf]$ ls -la
total 36
drwxrwxr-x. 1 mikhail mikhail    26 ноя  5 23:02 .
drwxrwxr-x. 1 mikhail mikhail  5816 ноя  5 22:42 ..
-rw-r--r--. 1 mikhail mikhail 33593 сен 25 04:29 udf_example.c

[mikhail@localhost udf]$ mysql_config --cflags
-I/usr/include/mysql -g -pipe -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC -fno-delete-null-pointer-checks  -g -static-libgcc -fno-omit-frame-pointer -fno-strict-aliasing

[mikhail@localhost udf]$ gcc $(mysql_config --cflags) -shared -fPIC -o udf_example.so udf_example.c
cc1: error: -Wformat-security ignored without -Wformat [-Werror=format-security]
In file included from /usr/include/pthread.h:21:0,
                 from /usr/include/mysql/my_global.h:294,
                 from udf_example.c:128:
/usr/include/features.h:328:4: warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp]
 #  warning _FORTIFY_SOURCE requires compiling with optimization (-O)
cc1: some warnings being treated as errors

Comment 1 Mikhail 2014-11-05 19:08:20 UTC
If I am manually remove -Werror=format-security parameter compile would be successful
$ gcc -I/usr/include/mysql -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fPIC -fno-delete-null-pointer-checks -g -static-libgcc -fno-omit-frame-pointer -fno-strict-aliasing -shared -fPIC -o udf_example.so udf_example.c

Comment 2 Jan Staněk 2014-11-06 10:07:38 UTC
The problem seems to originate in the way the mysql_config scripts is created during mariadb configuration and how it actually produces the --cflags output.

When the cmake scripts are run in the specfile, the mysql_config picks up actual CFLAGS environment variable and uses it as a base for reporting. However, when actually asked for the CFLAGS (by executing it with --cflags option or similar), it does some preprocessing on the saved values - including removing warning-related flags. The regexp ('-W[-A-Za-z]*') catches (and thus removes) the -Wall options (which "include" -Wformat), but not the -Werror=format-security (which *needs* -Wformat specified in one way or another).

The regexp should definitely be fixed, the question is how -- should it also remove the -Werror=format-security, or should it leave the -Wall option in order to get the aforementioned option to work?

Guessing from the way the script is written, I think that the -Werror... should be removed as well as the others and leave the decision about compiler warnings and errors to the end user. I will contact upstream and hope for feedback.

Comment 3 Jan Staněk 2014-11-20 11:43:42 UTC
Created attachment 959298 [details]
Upstream patch

Comment 4 Jan Staněk 2014-11-20 11:49:49 UTC
Upstream fixed this issue and it should be shipped with the next release of mariadb 5.5. The fix is accesible at [1] and the Mariadb bug with commentary on this issue is at [2].

For the time being, I am going to apply the patch to current MariaDB, which should fix the issue until next upstream release.

[1] http://bazaar.launchpad.net/~maria-captains/maria/5.5/revision/4360
[2] https://mariadb.atlassian.net/browse/MDEV-7028

Comment 5 Fedora Update System 2014-11-25 08:19:47 UTC
mariadb-10.0.14-8.fc21 has been submitted as an update for Fedora 21.

Comment 6 Fedora Update System 2014-11-25 21:24:46 UTC
Package mariadb-10.0.14-8.fc21:
* should fix your issue,
* was pushed to the Fedora 21 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing mariadb-10.0.14-8.fc21'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 7 Fedora Update System 2014-12-06 09:59:27 UTC
mariadb-10.0.14-8.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

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