openmpi-default @4.0.1 +gfortran configure: error: C and C++ compilers are not link compatible. Can not continue.

[willic3 (Charles Williams)]

I am unable to install openmpi-default with the +gfortran variant. It configures and installs fine without this variant. I believe the reason is the following from the openmpi config.log:

configure:26308: WARNING:  -finline-functions has been added to CXXFLAGS
configure:26319: checking if C and C++ are link compatible
configure:26344: /usr/bin/clang -c -O3 -DNDEBUG -pipe -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -arch x86_64 -finline-functions -fno-strict-aliasing -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk conftest_c.c
configure:26351: $? = 0
configure:26382: /usr/bin/clang++ -o conftest -DNDEBUG -pipe -stdlib=libstdc++ -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -arch x86_64 -finline-functions -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -Wl,-headerpad_max_install_names -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk conftest.cpp conftest_c.o  -lz >&5
clang: warning: libstdc++ is deprecated; move to libc++ [-Wdeprecated]
warning: include path for stdlibc++ headers not found; pass '-stdlib=libc++' on the command line to use the libc++ standard library instead [-Wstdlibcxx-not-found]
1 warning generated.
ld: library not found for -lstdc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I believe that the correct flag would be '-stdlib=libc++', but this doesn't happen when using the +gfortran variant. Is there a simple workaround for this problem? I initially discovered this issue because an update triggered a rebuild of openmpi-default. I need the +gfortran variant for other packages (e.g., hdf5 @1.10.5_0+cxx+fortran+gfortran+hl+openmpi+szip). My system info: MacOS 10.14.6

xcodebuild -version
Xcode 11.1
Build version 11A1027

port version
Version: 2.6.1

Thanks, Charles

[willic3 (Charles Williams)]

Macports log.

[willic3 (Charles Williams)]

openmpi configure log

[kencu (Ken)]

Appears to be essentially a duplicate of 59329

[dubiousjim]

I think I have a similar issue, but I can open a new ticket if appropriate. I'm trying to install openmpi-clang90, but I get the same error reported above. Error persisted when I built using configure.cxx_stdlib='libc++', and/or built using the +g95 variant (the +gfortran variant doesn't seem to be available anymore on either openmpi-clang90 nor on openmpi-default), and/or attempted to install openmpi-clang80 or openmpi-default instead.

If I cd into the work directory and enter the configure command manually (sudo /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_openmpi/openmpi-clang90/work/openmpi-4.0.1/configure --prefix=/opt/local --enable-mpi-fortran --enable-mpi-cxx FFLAGS='' F77='' --bindir=/opt/local/libexec/openmpi-clang90 --libdir=/opt/local/lib/openmpi-clang90 --sysconfdir=/opt/local/etc/openmpi-clang90 --includedir=/opt/local/include/openmpi-clang90 --datadir=/opt/local/share/openmpi-clang90 --docdir=/opt/local/share/docdelete --mandir=/opt/local/share/mandelete --with-hwloc=/opt/local) it completes successfully. But then it's using gcc for gcc instead of /opt/local/bin/clang-mp-9.0).

[dubiousjim]

log of failed configure for openmpi-clang90

[dubiousjim]

log of successful manual configure for openmpi-clang90