libgcc-devel @6-20160421_0 build fails on OS X 10.10.5

[mopihopi]

Upgrading libgcc-devel to @6-20160421_0 on OS X 10.10.5 results in a build failure, using Xcode 7.2.1 Build version 7C1002.

--->  Computing dependencies for libgcc-devel
--->  Fetching archive for libgcc-devel
--->  Attempting to fetch libgcc-devel-6-20160421_0.darwin_14.x86_64.tbz2 from https://packages.macports.org/libgcc-devel
--->  Attempting to fetch libgcc-devel-6-20160421_0.darwin_14.x86_64.tbz2 from http://sea.us.packages.macports.org/macports/packages/libgcc-devel
--->  Attempting to fetch libgcc-devel-6-20160421_0.darwin_14.x86_64.tbz2 from http://lil.fr.packages.macports.org/libgcc-devel
--->  Fetching distfiles for libgcc-devel
--->  Attempting to fetch gcc-6-20160421.tar.bz2 from https://distfiles.macports.org/gcc6
--->  Attempting to fetch gcc-6-20160421.tar.bz2 from ftp://gcc.gnu.org/pub/gcc/snapshots/6-20160421/
--->  Verifying checksums for libgcc-devel                                           
--->  Extracting libgcc-devel
--->  Configuring libgcc-devel
--->  Building libgcc-devel
Error: org.macports.build for port libgcc-devel returned: command execution failed
Please see the log file for port libgcc-devel for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc6/libgcc-devel/main.log
Error: Unable to upgrade port: 1
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets

The same issue occurs on both the buildbot and locally.
​https://build.macports.org/builders/buildports-yosemite-x86_64/builds/9209/steps/compile/logs/stdio

...
Comparing stages 2 and 3
warning: gcc/cc1-checksum.o differs
warning: gcc/cc1obj-checksum.o differs
warning: gcc/cc1objplus-checksum.o differs
warning: gcc/cc1plus-checksum.o differs
Bootstrap comparison failure!
gcc/auto-profile.o differs
gcc/bb-reorder.o differs
gcc/build/genconfig.o differs
gcc/build/genflags.o differs
gcc/build/genpeep.o differs
gcc/build/genrecog.o differs
gcc/build/vec.o differs
gcc/c/c-parser.o differs
gcc/c/c-typeck.o differs
gcc/cfganal.o differs
gcc/combine.o differs
gcc/cp/constexpr.o differs
gcc/dwarf2out.o differs
gcc/expmed.o differs
gcc/fixed-value.o differs
gcc/fortran/arith.o differs
gcc/fortran/resolve.o differs
gcc/fortran/trans-common.o differs
gcc/fwprop.o differs
gcc/graphite-scop-detection.o differs
gcc/ipa-cp.o differs
gcc/ipa-devirt.o differs
gcc/ipa-icf.o differs
gcc/ipa.o differs
gcc/lto-cgraph.o differs
gcc/postreload.o differs
gcc/recog.o differs
gcc/reload1.o differs
gcc/rtlanal.o differs
gcc/timevar.o differs
gcc/tree-cfg.o differs
gcc/tree-chkp-opt.o differs
gcc/tree-data-ref.o differs
gcc/tree-eh.o differs
gcc/tree-into-ssa.o differs
gcc/tree-parloops.o differs
gcc/tree-sra.o differs
gcc/tree-ssa-loop-ivopts.o differs
gcc/tree-ssa-pre.o differs
gcc/tree-ssa-structalias.o differs
gcc/tree-vect-loop-manip.o differs
gcc/tree.o differs
gcc/varasm.o differs
gcc/vec.o differs
libcpp/expr.o differs
make[2]: *** [compare] Error 1
make[2]: Leaving directory `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc6/libgcc-devel/work/build'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc6/libgcc-devel/work/build'
make: *** [bootstrap] Error 2
make: Leaving directory `/opt/local/var/macports/build/_opt_mports_dports_lang_gcc6/libgcc-devel/work/build'
Command failed:  cd "/opt/local/var/macports/build/_opt_mports_dports_lang_gcc6/libgcc-devel/work/build" && /usr/bin/make -j5 -w bootstrap 
Exit code: 2
Error: org.macports.build for port libgcc-devel returned: command execution failed

[dstrubbe (David Strubbe)]

Cc Me!

[dstrubbe (David Strubbe)]

cc'ing Ryan who made the last update

[dstrubbe (David Strubbe)]

Note: what was libgcc-devel is now called libgcc (r148332)

[dbevans (David B. Evans)]

Looks like it's failing on 10.10+ per the buildbots.

[dstrubbe (David Strubbe)]

Yes, and this is a much bigger deal now that it is the default dependency for all the gcc versions. Some possible insight might come from: ​https://github.com/Homebrew/legacy-homebrew/issues/38501 and ticket #45174.

[SickTeddyBear]

Cc Me!

[ryandesign (Ryan Carsten Schmidt)]

It built successfully for me on my El Capitan system before committing. I have Xcode 7.3 on my system. I think the El Capitan buildbot is still running Xcode 7.1 and the Yosemite buildbot is still running Xcode 6.4 so maybe this is something Apple fixed in later clang versions.

Thanks for the reference to the Homebrew issue. I will first have to see if I can reproduce the problem locally by downgrading my Xcode, then see if any of the suggested fixes work for us.

#45174 is not related; that was a PowerPC-specific bug in ld64. We have had many tickets over the years about "Bootstrap comparison failure" when building gcc, which are not all caused by the same issue.

[jakubsafar@…]

Cc Me!

[jakubsafar@…]

Cc Me!

[mf2k (Frank Schima)]

Build fails for me too on Yosemite. I think this should be considered High priority.

$ uname -a
Darwin 670fsmac 14.5.0 Darwin Kernel Version 14.5.0: Mon Jan 11 18:48:35 PST 2016; root:xnu-2782.50.2~1/RELEASE_X86_64 x86_64

$ xcodebuild -version
Xcode 7.2.1
Build version 7C1002

[mf2k (Frank Schima)]

Cc Me!

[dbevans (David B. Evans)]

Same here. See also #51311.

[W-E-Brown]

Cc Me!

[almage (Roy Miller)]

on Yosemite (10.10.5), with Xcode 7.2.1, trying to install gcc5, using current Portfile @148332, fails when installing libgcc, now using libgcc @6.1.0. Creating a local port repository, and the previous gcc5 Portfile @148017, gcc installs immediately with no errors. Fetches libgcc-5.3.0_1.darwin_14.x86_64.tbz2.rmd160, installs and downloads gcc5.

Thu May 05 09:32:39 archer macports> sudo port install gcc5
--->  Computing dependencies for gcc5
--->  Dependencies to be installed: libgcc
--->  Fetching archive for libgcc
--->  Attempting to fetch libgcc-5.3.0_1.darwin_14.x86_64.tbz2 from http://sea.us.packages.macports.org/macports/packages/libgcc
--->  Attempting to fetch libgcc-5.3.0_1.darwin_14.x86_64.tbz2.rmd160 from http://sea.us.packages.macports.org/macports/packages/libgcc
--->  Installing libgcc @5.3.0_1
--->  Activating libgcc @5.3.0_1
--->  Cleaning libgcc
--->  Fetching archive for gcc5
--->  Attempting to fetch gcc5-5.3.0_1.darwin_14.x86_64.tbz2 from http://sea.us.packages.macports.org/macports/packages/gcc5
--->  Attempting to fetch gcc5-5.3.0_1.darwin_14.x86_64.tbz2.rmd160 from http://sea.us.packages.macports.org/macports/packages/gcc5
--->  Installing gcc5 @5.3.0_1
--->  Activating gcc5 @5.3.0_1
--->  Cleaning gcc5
--->  Updating database of binaries
--->  Scanning binaries for linking errors               
--->  No broken files found.

[almage (Roy Miller)]

Cc Me!

[Schamschula (Marius Schamschula)]

Cc Me!

[dbevans (David B. Evans)]

Cc Me!

[ryandesign (Ryan Carsten Schmidt)]

I was able to reproduce the build failure of libgcc @6.1.0 on Yosemite with Xcode 7.1.1. Based on the homebrew bug report, I tried adding --with-build-config=bootstrap-debug; the build of libgcc succeeded. I'm still building gcc6 to make sure that works. gcc7 will surely need the same fix. I still need to test earlier versions to see if they're affected. --with-build-config was added in gcc 4.5 so we could add the flag all the way back to the gcc45 port. (If I understand correctly, bootstrap-debug was the default build config before that flag was added, so versions earlier than 4.5 should not be affected.)

My patch also changes build.target from bootstrap to bootstrap-lean, which should have no effect other than the build using less disk space.

[benoit.bayol@…]

Cc Me!

[vsoftco@…]

This is indeed high priority. I cannot install any gcc now on my Yosemite XCode 7.2.1, same error as listed above.

[vsoftco@…]

Cc Me!

[almage (Roy Miller)]

Replying to vsoftco@…:

This is indeed high priority. I cannot install any gcc now on my Yosemite XCode 7.2.1, same error as listed above.

for a way to install gcc-5.3.0_1 now, see comment 18.

[petrrr]

Cc Me!

[ryandesign (Ryan Carsten Schmidt)]

Has duplicates #51322, #51323.

[napierdmark@…]

Replying to ryandesign@…:

Has duplicates #51322, #51323.

OK, google is not helping. How do I modify my portfile to get gcc5 shown in comment:18? Trying to install gnuradio. Macports manipulation not in my wheelhouse.

Tried a clean build with the setting in comment:22. Didn't seem to make any difference.

[ryandesign (Ryan Carsten Schmidt)]

Replying to napierdmark@…:

How do I modify my portfile to get gcc5 shown in comment:18?

Don't do that; just run sudo port selfupdate to receive the fix I committed in r148391.

If you don't want to have to compile it yourself, wait a few hours and the buildbot should have built a binary package.

[ryandesign (Ryan Carsten Schmidt)]

Wait, you said using the setting in comment:22 did not help, with (referring to your ticket) Xcode 7.2.1 on Yosemite? It fixed the problem on my Yosemite system with Xcode 7.1.1. Let's wait and see what the ​buildbot does.

[napierdmark@…]

Replying to ryandesign@…:

Replying to napierdmark@…:

How do I modify my portfile to get gcc5 shown in comment:18?

Don't do that; just run sudo port selfupdate to receive the fix I committed in r148391.

If you don't want to have to compile it yourself, wait a few hours and the buildbot should have built a binary package.

Success. Thanks!

--->  Staging libgcc into destroot
--->  Installing libgcc @6.1.0_0
--->  Activating libgcc @6.1.0_0
--->  Cleaning libgcc
--->  Updating database of binaries
--->  Scanning binaries for linking errors               
--->  No broken files found.
Macusers-MacBook-Pro:~ napierm$ 

[vsoftco@…]

Confirmed that it works now on Xcode 7.2.1 (OS X Yosemite). Thanks!