openmpi @4.1.4: subports openmpi-gcc7 and openmpi-gcc9: builds failing for 10.7 and earlier

[mascguy (Christopher Nielsen)]

While previous releases of openmpi-gcc7 and openmpi-gcc9 build successfully for 10.7 and earlier, the latest version fails on our buildbots:

checking whether the C compiler works... no
configure: error: C compiler cannot create executables

• ​https://ports.macports.org/port/openmpi-gcc7/details/
• ​https://ports.macports.org/port/openmpi-gcc9/details/

Currently travelling, without access to my suite of macOS VMs, so I can't try to reproduce this locally. But I'm hoping it's something related to stdlib, such as this prior issue with gdal:

​59989 - gdal +gcc: configure: error: C compiler cannot create executables

[mascguy (Christopher Nielsen)]

Reviewing config.log, it looks like the following is occurring:

configure:6591: checking whether the C compiler works
configure:6613: /opt/local/bin/gcc-mp-7 -pipe -Os -I/opt/local/include/LegacySupport -arch x86_64 -I/opt/local/include/L
egacySupport -Wl,-headerpad_max_install_names -lMacportsLegacySupport conftest.c  >&5
ld: library not found for -lgcc_ext.10.5
collect2: error: ld returned 1 exit status

This appears to be the same problem covered by issue:65055, so need to do more digging.

[mascguy (Christopher Nielsen)]

Chris/Ken, any thoughts, per issue:65055?

[cjones051073 (Chris Jones)]

please attach here, if you can, the conftest.c referred to above

[Chris Jones <jonesc@…>]

In 61e01e26b3cb2bbbdee8920c44e9e49fc4154f73/macports-ports (master):

libgcc9: Fix build of runtime on OSX10.7 and older
See: #65337
See: #65055

[mascguy (Christopher Nielsen)]

Replying to cjones051073:

please attach here, if you can, the conftest.c referred to above

Full configure log attached. But it looks like that test program is:

configure: failed program was:
98	| /* confdefs.h */
99	| #define PACKAGE_NAME "Open MPI"
100	| #define PACKAGE_TARNAME "openmpi"
101	| #define PACKAGE_VERSION "4.1.4"
102	| #define PACKAGE_STRING "Open MPI 4.1.4"
103	| #define PACKAGE_BUGREPORT "http://www.open-mpi.org/community/help/"
104	| #define PACKAGE_URL ""
105	| #define OPAL_ARCH "x86_64-apple-darwin11.4.2"
106	| /* end confdefs.h.  */
107	|
108	| int
109	| main ()
110	| {
111	|
112	|   ;
113	|   return 0;
114	| }

[mascguy (Christopher Nielsen)]

After building libgcc9 locally with the latest commit from @cjones, the problem is resolved. Also queued rebuilds for 10.7 and earlier on the buildbots.

Thanks for the quick fix Chris!

[cjones051073 (Chris Jones)]

No need to manually queue rebuilds, the revbump would have handled it.

[mascguy (Christopher Nielsen)]

Replying to cjones051073:

No need to manually queue rebuilds, the revbump would have handled it.

Rebuilds were queued for openmpi-gcc7 and openmpi-gcc9, not libgcc9. ;-)

[cjones051073 (Chris Jones)]

My commit above ups the revision for libgcc9, so a rebuild would have been automatic.

[cjones051073 (Chris Jones)]

Sorry, I see what you are saying now. My mistake….