[Ltrace-devel] ltrace-0.7.2: proc.c: In function 'crawl_linkmap': error: 'rlm.l_addr' may be used uninitialized

[Sedat Dilek]

Seems to be again a problem of "-0s" gcc optimization-level ("-O2" works fine).
What about adding a testcase?

- Sedat -

My testcase scenario:

$ LANG=C LC_ALL=C make ltrace-clean

$ rm -f $HOME/src/freetz/freetz-git/source/target-mipsel_uClibc-0.9.33.2/config.cache

$ grep TARGET_CFLAGS .config
FREETZ_TARGET_CFLAGS="-Os -pipe -Wa,--trap"

$ LANG=C LC_ALL=C make FREETZ_JLEVEL=1 FREETZ_TARGET_CFLAGS="-O2 -pipe
-Wa,--trap" ltrace-precompiled 2>&1 | tee
../make_ltrace-precompiled_O2optimzed.txt

NOTE: config.cache file has to be deleted to use a custom FREETZ_TARGET_CFLAGS.

- Sedat -

On Sun, Dec 16, 2012 at 10:39 PM, Sedat Dilek <sedat.dilek at gmail.com> wrote:
> Seen when building ltrace-0.7.2 on MIPSEL (Freetz build-system):
> ...
> /bin/bash ../../libtool --tag=CC   --mode=compile
> /home/wearefam/src/freetz/freetz-git/toolchain/build/mipsel_gcc-4.7.2-RC-20120914_uClibc-0.9.33.2/mipsel-linux-uclibc/bin/mipsel-linux-uclibc-gcc
> -DHAVE_CONFIG_H -I. -I../..  -I../../sysdeps/linux-gnu/mipsel
> -I../../sysdeps/linux-gnu       -I../../sysdeps         -I../..
> -Wall -Wsign-compare -Wfloat-equal -Wformat-security -Werror
> -march=4kc -Os -pipe -Wa,--trap -D_LARGEFILE_SOURCE
> -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -MT proc.lo -MD -MP -MF
> .deps/proc.Tpo -c -o proc.lo proc.c
> libtool: compile:
> /home/wearefam/src/freetz/freetz-git/toolchain/build/mipsel_gcc-4.7.2-RC-20120914_uClibc-0.9.33.2/mipsel-linux-uclibc/bin/mipsel-linux-uclibc-gcc
> -DHAVE_CONFIG_H -I. -I../.. -I../../sysdeps/linux-gnu/mipsel
> -I../../sysdeps/linux-gnu -I../../sysdeps -I../.. -Wall -Wsign-compare
> -Wfloat-equal -Wformat-security -Werror -march=4kc -Os -pipe
> -Wa,--trap -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
> -D_FILE_OFFSET_BITS=64 -MT proc.lo -MD -MP -MF .deps/proc.Tpo -c
> proc.c  -fPIC -DPIC -o .libs/proc.o
> proc.c: In function 'crawl_linkmap':
> proc.c:544:25: error: 'rlm.l_addr' may be used uninitialized in this
> function [-Werror=maybe-uninitialized]
> cc1: all warnings being treated as errors
> make[5]: *** [proc.lo] Error 1
> make[5]: Leaving directory
> `/home/wearefam/src/freetz/freetz-git/source/target-mipsel_uClibc-0.9.33.2/ltrace-0.7.2/sysdeps/linux-gnu'
> make[4]: *** [all-recursive] Error 1
> make[4]: Leaving directory
> `/home/wearefam/src/freetz/freetz-git/source/target-mipsel_uClibc-0.9.33.2/ltrace-0.7.2/sysdeps/linux-gnu'
> make[3]: *** [all-recursive] Error 1
> make[3]: Leaving directory
> `/home/wearefam/src/freetz/freetz-git/source/target-mipsel_uClibc-0.9.33.2/ltrace-0.7.2/sysdeps'
> make[2]: *** [all-recursive] Error 1
> make[2]: Leaving directory
> `/home/wearefam/src/freetz/freetz-git/source/target-mipsel_uClibc-0.9.33.2/ltrace-0.7.2'
> make[1]: *** [all] Error 2
> make[1]: Leaving directory
> `/home/wearefam/src/freetz/freetz-git/source/target-mipsel_uClibc-0.9.33.2/ltrace-0.7.2'
>
> ERROR: Build failed.
> make: *** [source/target-mipsel_uClibc-0.9.33.2/ltrace-0.7.2/ltrace] Error 1
>
> - Sedat -