Bug#925795: openblas: ftbfs with GCC-9

[Matthias Klose]

Package: src:openblas
Version: 0.3.5+ds-3
Severity: normal
Tags: sid bullseye
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-9

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-9/g++-9, but succeeds to build with gcc-8/g++-8. The
severity of this report will be raised before the bullseye release,
so nothing has to be done for the buster release.

The full build log can be found at:
http://people.debian.org/~doko/logs/gcc9-20190321/openblas_0.3.5+ds-3_unstable_gcc9.log
The last lines of the build log are at the end of this report.

To build with GCC 9, either set CC=gcc-9 CXX=g++-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-9/porting_to.html

GCC 9 also passes the linker option --as-needed by default; typical
build issues are passing libraries before object files to the linker,
or underlinking of convenience libraries built from the same source.

[...]

 STBMV  PASSED THE COMPUTATIONAL TESTS (  1153 CALLS)

 STPMV  PASSED THE TESTS OF ERROR-EXITS

 STPMV  PASSED THE COMPUTATIONAL TESTS (   289 CALLS)

 STRSV  PASSED THE TESTS OF ERROR-EXITS

 STRSV  PASSED THE COMPUTATIONAL TESTS (   289 CALLS)

 STBSV  PASSED THE TESTS OF ERROR-EXITS

 STBSV  PASSED THE COMPUTATIONAL TESTS (  1153 CALLS)

 STPSV  PASSED THE TESTS OF ERROR-EXITS

 STPSV  PASSED THE COMPUTATIONAL TESTS (   289 CALLS)

 SGER   PASSED THE TESTS OF ERROR-EXITS

 SGER   PASSED THE COMPUTATIONAL TESTS (   484 CALLS)

 SSYR   PASSED THE TESTS OF ERROR-EXITS

 SSYR   PASSED THE COMPUTATIONAL TESTS (   145 CALLS)

 SSPR   PASSED THE TESTS OF ERROR-EXITS

 SSPR   PASSED THE COMPUTATIONAL TESTS (   145 CALLS)

 SSYR2  PASSED THE TESTS OF ERROR-EXITS

 SSYR2  PASSED THE COMPUTATIONAL TESTS (   577 CALLS)

 SSPR2  PASSED THE TESTS OF ERROR-EXITS

 SSPR2  PASSED THE COMPUTATIONAL TESTS (   577 CALLS)

 END OF TESTS
OPENBLAS_NUM_THREADS=1 OMP_NUM_THREADS=1 ./dblat2 < ./dblat2.dat

Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0  0x7f05c2f48b40 in ???
#1  0x7f05c2f47d75 in ???
#2  0x7f05c2bfb93f in ???
#3  0x56138719d487 in dgemv_kernel_4x1
	at ../kernel/x86_64/dgemv_n_4.c:143
#4  0x56138719d915 in dgemv_n_SKYLAKEX
	at ../kernel/x86_64/dgemv_n_4.c:318
#5  0x56138610512f in dgemv_
	at ./interface/gemv.c:231
#6  0x5613860ffcb4 in dchk1_
	at ./test/dblat2.f:582
#7  0x561386104961 in dblat2
	at ./test/dblat2.f:305
#8  0x5613860f604e in main
	at ./test/dblat2.f:390
Segmentation fault
make[3]: *** [Makefile:32: level2] Error 139
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory '/<<BUILDDIR>>/openblas-0.3.5+ds/test'
make[2]: *** [Makefile:124: tests] Error 2
make[2]: Leaving directory '/<<BUILDDIR>>/openblas-0.3.5+ds'
make[1]: *** [debian/rules:74: override_dh_auto_build] Error 2
make[1]: Leaving directory '/<<BUILDDIR>>/openblas-0.3.5+ds'
make: *** [debian/rules:71: binary-arch] Error 2
dpkg-buildpackage: error: debian/rules binary-arch subprocess returned exit status 2