Bug#778123: slepc: ftbfs with GCC-5

[Matthias Klose]

Package: src:slepc
Version: 3.4.2.dfsg-2
Severity: normal
Tags: sid stretch
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-5

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-5/g++-5, but succeeds to build with gcc-4.9/g++-4.9. The
severity of this report may be raised before the stretch release.

The full build log can be found at:
http://people.debian.org/~doko/logs/gcc5-20150205/slepc_3.4.2.dfsg-2_unstable_gcc5.log
The last lines of the build log are at the end of this report.

To build with GCC 5, either set CC=gcc-5 CXX=g++-5 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t experimental install g++ 

Common build failures are C11 as the default C mode, 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-5/porting_to.html

[...]
libfast in: /«PKGBUILDDIR»/src/ds/impls/ghep
libfast in: /«PKGBUILDDIR»/src/ds/impls/ghiep
libfast in: /«PKGBUILDDIR»/src/ds/impls/gnhep
libfast in: /«PKGBUILDDIR»/src/ds/impls/svd
libfast in: /«PKGBUILDDIR»/src/ds/impls/nep
libfast in: /«PKGBUILDDIR»/src/ds/examples
libfast in: /«PKGBUILDDIR»/src/ds/examples/tests
libfast in: /«PKGBUILDDIR»/src/fn
libfast in: /«PKGBUILDDIR»/src/fn/ftn-auto
libfast in: /«PKGBUILDDIR»/src/sys
libfast in: /«PKGBUILDDIR»/src/sys/f90-mod
slepcmod.F:26:11:

         use petscksp
           1
Fatal Error: Cannot read module file 'petscksp.mod' opened at (1), because it was created by a different version of GNU Fortran
compilation terminated.
/usr/bin/ar: slepcmod.o: No such file or directory
/bin/cp: cannot stat '*.mod': No such file or directory
makefile:50: recipe for target 'modcopy_slepc' failed
make[8]: *** [modcopy_slepc] Error 1
makefile:45: recipe for target 'buildmod_slepc' failed
make[7]: *** [buildmod_slepc] Error 2
/usr/lib/petsc/conf/rules:130: recipe for target 'libfast' failed
make[6]: [libfast] Error 2 (ignored)
libfast in: /«PKGBUILDDIR»/src/sys/ftn-auto
libfast in: /«PKGBUILDDIR»/src/sys/ftn-custom
libfast in: /«PKGBUILDDIR»/src/vec
libfast in: /«PKGBUILDDIR»/src/vec/ftn-auto
libfast in: /«PKGBUILDDIR»/include
libfast in: /«PKGBUILDDIR»/include/finclude
libfast in: /«PKGBUILDDIR»/include/finclude/ftn-auto
libfast in: /«PKGBUILDDIR»/include/finclude/ftn-custom
libfast in: /«PKGBUILDDIR»/include/slepc-private
libfast in: /«PKGBUILDDIR»/docs
Completed building libraries
=========================================
making shared libraries in /«PKGBUILDDIR»/linux-gnu-c-debug/lib
building libslepc.so
=========================================
*******************************ERROR************************************
  Error during compile, check linux-gnu-c-debug/conf/make.log               
  Send all contents of linux-gnu-c-debug/conf to slepc-maint at grycap.upv.es  
************************************************************************
make[1]: *** [all] Error 1
makefile:35: recipe for target 'all' failed
make[1]: Leaving directory '/«PKGBUILDDIR»'
make: *** [build-arch] Error 2
debian/rules:72: recipe for target 'build-arch' failed
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2