Package: libmpich-dev Version: 3.1-5+b2 Severity: normal Dear Maintainer,
the mpicc.mpich allows to exchange the underlying compiler via the "-cc=" parameter. Calling > mpicc.mpich -cc=gcc-4.8 test.c fails, as gcc will complain about unknown compiler flags. I'd expect that passing different compiler via -cc=... results working mpi program. %%%%%%%%%% Let's look at this in a bit more details... The problem underneath becomes obvious when asking for the compiler flags: > mpicc.mpich -compile_info gcc -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector-strong -Wformat -Werror =format-security -Wl,-z,relro -I/usr/include/mpich -L/usr/lib/x86_64-linux-gnu -lmpich -lopa -lmpl -lrt -lcr -lpthread the output contains the "-fstack-protector-strong" parameter, which is not available with gcc-4.8 alternatively you can ask via pkg-config > pkg-config --cflags mpich -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector-strong -Wformat -Werror=format- security -I/usr/include/mpich The problem is here that the actual compiler flags and the compiler are mixed. When switching to use "-fstack-protector-strong" Debian basically decided to use a different compiler, so in my opinion the right configuration is (in make- style): CC="gcc -fstack-protector-strong" CFLAGS="-D_FORTIFY_SOURCE=2 -g -O2 -Wformat -Werror=format-security -I/usr/include/mpich" When the "-fstack-protector-strong" parameter is part of the compiler command, the compiler can be exchanged without problems. -- System Information: Debian Release: stretch/sid APT prefers proposed-updates APT policy: (500, 'proposed-updates'), (500, 'oldoldstable'), (500, 'testing'), (400, 'stable'), (300, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages libmpich-dev depends on: ii g++ 4:4.9.2-4 ii gfortran 4:4.9.2-4 ii libc6 2.19-18 ii libcr-dev 0.8.5-2.2 ii libcr0 0.8.5-2.2 ii libmpich12 3.1-5+b2 ii libmpl-dev 3.1-5+b2 ii libopa-dev 3.1-5+b2 Versions of packages libmpich-dev recommends: ii mpich 3.1-5+b2 libmpich-dev suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
