Bug#746879: libphash: ftbfs with GCC-4.9

[Matthias Klose]

Package: src:libphash
Version: 0.9.4-1.4
Severity: important
Tags: sid jessie
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-4.9

The package fails to build in a test rebuild on at least amd64 with
gcc-4.9/g++-4.9, but succeeds to build with gcc-4.8/g++-4.8. The
severity of this report may be raised before the jessie release.

The full build log can be found at:
http://people.debian.org/~doko/logs/failed-gcc49/libphash_0.9.4-1.4_unstable_gcc49.log
The last lines of the build log are at the end of this report.

To build with GCC 4.9, either set CC=gcc-4.9 CXX=g++-4.9 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t experimental install g++ 

Common build failures are new warnings resulting in build failures
with -Werror turned on, or new/dropped symbols in Debian symbols
files.  For other C/C++ related build failures see the porting guide
at http://gcc.gnu.org/gcc-4.9/porting_to.html

[...]
configure: creating ./config.status
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating examples/Makefile
config.status: creating pHash.pc
config.status: creating bindings/Makefile
config.status: creating bindings/java/Makefile
config.status: creating config.h
config.status: creating pHash-config.h
config.status: pHash-config.h is unchanged
config.status: executing depfiles commands
config.status: executing libtool commands
configure: WARNING: unrecognized options: --disable-maintainer-mode
make[1]: Leaving directory `/«PKGBUILDDIR»'
   dh_auto_build -a
make[1]: Entering directory `/«PKGBUILDDIR»'
make  all-recursive
make[2]: Entering directory `/«PKGBUILDDIR»'
Making all in src
make[3]: Entering directory `/«PKGBUILDDIR»/src'
/bin/bash ../libtool --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I. -I..   -O2 -pthread -I/usr/local/include -I/usr/include/ffmpeg -Dcimg_use_jpeg -Dcimg_use_png  -D__STDC_CONSTANT_MACROS -ffast-math -O3 -c -o pHash.lo pHash.cpp
libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I.. -O2 -pthread -I/usr/local/include -I/usr/include/ffmpeg -Dcimg_use_jpeg -Dcimg_use_png -D__STDC_CONSTANT_MACROS -ffast-math -O3 -c pHash.cpp  -fPIC -DPIC -o .libs/pHash.o
In file included from pHash.cpp:25:0:
pHash.h:43:0: warning: "__STDC_CONSTANT_MACROS" redefined
 #define __STDC_CONSTANT_MACROS
 ^
<command-line>:0:0: note: this is the location of the previous definition
In file included from pHash.h:50:0,
                 from pHash.cpp:25:
/usr/include/CImg.h: In function 'cimg_library::CImg<T> cimg_library::CImg<T>::get_resize(int, int, int, int, int, unsigned int, float, float, float, float) const [with T = float]':
/usr/include/CImg.h:20807:5: error: insn does not satisfy its constraints:
     }
     ^
(insn 641 195 196 48 (set (reg:DI 21 xmm0)
        (reg:DI 0 ax)) 89 {*movdi_internal}
     (nil))
/usr/include/CImg.h:20807:5: internal compiler error: in copyprop_hardreg_forward_1, at regcprop.c:775
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.9/README.Bugs> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.
make[3]: *** [pHash.lo] Error 1
make[3]: Leaving directory `/«PKGBUILDDIR»/src'
make[2]: *** [all-recursive] Error 1
make[1]: *** [all] Error 2
make[2]: Leaving directory `/«PKGBUILDDIR»'
make[1]: Leaving directory `/«PKGBUILDDIR»'
dh_auto_build: make -j1 returned exit code 2
make: *** [build-arch] Error 2
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2