f2py build hangs after running gcc w/1.15.0 #11649
Description
Sorry for a rather incomplete bug report, but isolating this to a code fragment may not be possible. I am happy to provide more help in diagnosis, though.
I have an automated Jenkins build procedure that uses f2py to generate .so files from a series of Fortran files. With anaconda packages
numpy-1.14.5 | py27h1b885b7_4 35 KB
numpy-base-1.14.5 | py27hdbf6ddf_4 4.1 MB
running on VM with Red Hat Enterprise Linux Server release 7.5 (Maipo), my build runs fine. If I update to
numpy 1.15.0 py27h1b885b7_0
numpy-base 1.15.0 py27h3dfced4_0
The build hangs in this command:
jenkins 23248 23087 0 12:10 ? 00:00:02 /var/lib/jenkins/jobs/Py2_L64_Build-copy/workspace/conda27/bin/python /var/lib/jenkins/jobs/Py2_L64_Build-copy/workspace/conda27/bin/f2py -c fellipse.for -m fellipse libspsubs.a libtexturesubs.a libDIFFaXsubs.a libpowsubs.a --fcompiler=gnu95 --f77exec=gfortran --f77flags=-fno-range-check -m64
with this following output:
building 'fellipse' extension
compiling C sources
C compiler: gcc -pthread -B /var/lib/jenkins/jobs/Py2_L64_Build-copy/workspace/conda27/compiler_compat -Wl,--sysroot=/ -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC
creating /tmp/tmpnkv0Hd/tmp
creating /tmp/tmpnkv0Hd/tmp/tmpnkv0Hd
creating /tmp/tmpnkv0Hd/tmp/tmpnkv0Hd/src.linux-x86_64-2.7
compile options: '-I/tmp/tmpnkv0Hd/src.linux-x86_64-2.7 -I/var/lib/jenkins/jobs/Py2_L64_Build-copy/workspace/conda27/lib/python2.7/site-packages/numpy/core/include -I/var/lib/jenkins/jobs/Py2_L64_Build-copy/workspace/conda27/include/python2.7 -c'
gcc: /tmp/tmpnkv0Hd/src.linux-x86_64-2.7/fellipsemodule.c
gcc: /tmp/tmpnkv0Hd/src.linux-x86_64-2.7/fortranobject.c
It apparently completes the gcc step and then hangs. It is not in an infinite loop, since the CPU time is not increasing. This is problem reproducible and restoring the previous numpy version addresses it.