bazel @0.26.1 build failure: unrecognized command line option '-fobjc-link-runtime'

[dbl001 (dbl)]

debug:sysinfo OS X 10.11 (darwin/15.6.0) arch i386
:debug:sysinfo MacPorts 2.5.4
:debug:sysinfo Xcode 8.2
:debug:sysinfo SDK 10.11
:debug:sysinfo MACOSX_DEPLOYMENT_TARGET: 10.11
$ gcc --version
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

info:build ^M^[[1A^[[Kgcc: error: unrecognized command line option '-fobjc-link-runtime'

$ sudo port upgrade outdated
--->  Computing dependencies for bazel
--->  Fetching archive for bazel
--->  Attempting to fetch bazel-0.26.1_0.darwin_15.x86_64.tbz2 from https://packages.macports.org/bazel
--->  Attempting to fetch bazel-0.26.1_0.darwin_15.x86_64.tbz2 from http://sea.us.packages.macports.org/macports/packages/bazel
--->  Attempting to fetch bazel-0.26.1_0.darwin_15.x86_64.tbz2 from http://ywg.ca.packages.macports.org/mirror/macports/packages/bazel
--->  Fetching distfiles for bazel
--->  Attempting to fetch bazel-0.26.1-dist.zip from https://distfiles.macports.org/bazel
--->  Verifying checksums for bazel                                             
--->  Extracting bazel
--->  Configuring bazel
--->  Building bazel
Error: Failed to build bazel: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_bazel/bazel/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.

[jmroot (Joshua Root)]

Seems to be the same as #56598 though that was said to be fixed at one point.

[cjones051073 (Chris Jones)]

Built just fine in the buildbots, as can bee seen from

​http://packages.macports.org/bazel/

as the tarballs are all there, for darwin14+.

Are you intentionally not using the prebuilt binaries ?

[cjones051073 (Chris Jones)]

Also, what does

which gcc

give you ?

[cjones051073 (Chris Jones)]

One other thing. Please run the build again, let it fail, then from the port work area ('port work bazel') dig out the file external/local_config_cc/cc_wrapper.sh and post it here. That script is auto-generated, so I need to see what *you* have in it... it is seemingly this script that is trying to run gcc

:info:build   external/local_config_cc/cc_wrapper.sh -lc++ -fobjc-link-runtime -Wl,-S -o bazel-out/host/bin/third_party/protobuf/3.6.1/protoc bazel-out/host/bin/third_party/protobuf/3.6.1/_objs/protoc/main.o bazel-out/host/bin/third_party/protobuf/3.6.1/libprotoc_lib.a bazel-out/host/bin/third_party/protobuf/3.6.1/libprotobuf.a bazel-out/host/bin/third_party/protobuf/3.6.1/libprotobuf_lite.a -headerpad_max_install_names -lpthread -lm -lpthread -lm -lpthread -lm -lpthread -lm -no-canonical-prefixes '-mmacosx-version-min=10.12')

which fails with

error: unrecognized command line option '-fobjc-link-runtime'

as that is a clang-only option...

I also need to see what which gcc gives for you, as I have a suspicion you might have port selected a gcc version, which means for you this is a real gcc compiler, rather than the clang wrapper the system provides.

[cjones051073 (Chris Jones)]

Ok, I was able to reproduce the problem, and indeed it occurs when the user has a 'port select' for gcc active.

Controlling the bazel build is tough, and at this point I don't know how to stop this, so the simplest fix is to detect when this situation occurs and issue an error message, telling the user to deactivate it, at least for the duration of the build.

[Chris Jones <jonesc@…>]

In 3f548181baf52f1fa241c93cd645208ef91fa5c7/macports-ports (master):

bazel: Detect when a gcc port select is active and issue a build error.

Closes:#58569

[dbl001 (dbl)]

$ which gcc
/usr/bin/gcc

[dbl001 (dbl)]

$ sudo port select gcc
Available versions for gcc:
	mp-gcc49
	mp-gcc5 (active)
	mp-gcc6
	mp-gcc7
	mp-gcc8
	none

[dbl001 (dbl)]

$ sudo port deactivate gcc5
--->  Deactivating gcc5 @5.5.0_4
--->  Cleaning gcc5
MacBook-Pro:lda2vec davidlaxer$ sudo port upgrade outdated
Portfile changed since last build; discarding previous state.
--->  Computing dependencies for bazel
--->  Fetching archive for bazel
--->  Attempting to fetch bazel-0.26.1_0.darwin_15.x86_64.tbz2 from https://packages.macports.org/bazel
--->  Attempting to fetch bazel-0.26.1_0.darwin_15.x86_64.tbz2.rmd160 from https://packages.macports.org/bazel
--->  Installing bazel @0.26.1_0
--->  Cleaning bazel
--->  Computing dependencies for bazel
--->  Deactivating bazel @0.26.0_0
--->  Cleaning bazel
--->  Activating bazel @0.26.1_0
--->  Cleaning bazel
--->  Fetching archive for curl-ca-bundle
--->  Attempting to fetch curl-ca-bundle-7.65.1_0.darwin_15.noarch.tbz2 from https://packages.macports.org/curl-ca-bundle
--->  Attempting to fetch curl-ca-bundle-7.65.1_0.darwin_15.noarch.tbz2.rmd160 from https://packages.macports.org/curl-ca-bundle
--->  Installing curl-ca-bundle @7.65.1_0
--->  Cleaning curl-ca-bundle
--->  Deactivating curl-ca-bundle @7.64.1_0
--->  Cleaning curl-ca-bundle
--->  Activating curl-ca-bundle @7.65.1_0
--->  Cleaning curl-ca-bundle
--->  Computing dependencies for curl
--->  Fetching archive for curl
--->  Attempting to fetch curl-7.65.1_0+ssl.darwin_15.x86_64.tbz2 from https://packages.macports.org/curl
--->  Attempting to fetch curl-7.65.1_0+ssl.darwin_15.x86_64.tbz2.rmd160 from https://packages.macports.org/curl
--->  Installing curl @7.65.1_0+ssl
--->  Cleaning curl
--->  Computing dependencies for curl
--->  Deactivating curl @7.64.1_0+ssl
--->  Cleaning curl
--->  Activating curl @7.65.1_0+ssl
--->  Cleaning curl
--->  Computing dependencies for py27-mako
--->  Fetching archive for py27-mako
--->  Attempting to fetch py27-mako-1.0.12_0.darwin_15.noarch.tbz2 from https://packages.macports.org/py27-mako
--->  Attempting to fetch py27-mako-1.0.12_0.darwin_15.noarch.tbz2.rmd160 from https://packages.macports.org/py27-mako
--->  Installing py27-mako @1.0.12_0
--->  Cleaning py27-mako
--->  Computing dependencies for py27-mako
--->  Deactivating py27-mako @1.0.11_0
--->  Cleaning py27-mako
--->  Activating py27-mako @1.0.12_0
--->  Cleaning py27-mako
--->  Updating database of binaries
--->  Scanning binaries for linking errors
--->  No broken files found.                             
--->  No broken ports found.
--->  Some of the ports you installed have notes:
  bazel has the following notes:
    See http://bazel.build/docs/getting-started.html to start a new project!