Linker crash when using GCC 12

[szhorvat (Szabolcs Horvát)]

When I use GCC 12 to build a certain project, the linker crashes at the final linking stage. This happens on an M1 Mac with the following OS:

ProductName:	macOS
ProductVersion:	12.6
BuildVersion:	21G115

It does NOT happen on an Intel Mac with:

ProductName:	Mac OS X
ProductVersion:	10.14.6
BuildVersion:	18G9323

The project I was trying to build is igraph, see ​https://github.com/igraph/igraph/ For reference, the build command was:

mkdir build && cd build
CC=gcc-mp-12 CXX=g++-mp-12 cmake .. -DBUILD_SHARED_LIBS=ON
cmake --build .

The error from the linking step is:

0  0x1011901a0  __assert_rtn + 140
1  0x101017a8c  mach_o::relocatable::Parser<arm64>::parse(mach_o::relocatable::ParserOptions const&) + 4536
2  0x100fe9d38  mach_o::relocatable::Parser<arm64>::parse(unsigned char const*, unsigned long long, char const*, long, ld::File::Ordinal, mach_o::relocatable::ParserOptions const&) + 148
3  0x1010524ac  ld::tool::InputFiles::makeFile(Options::FileInfo const&, bool) + 1468
4  0x101055360  ___ZN2ld4tool10InputFilesC2ER7Options_block_invoke + 56
5  0x1b86d81f4  _dispatch_client_callout2 + 20
6  0x1b86eb954  _dispatch_apply_invoke + 224
7  0x1b86d81b4  _dispatch_client_callout + 20
8  0x1b86e9a04  _dispatch_root_queue_drain + 680
9  0x1b86ea104  _dispatch_worker_thread2 + 164
10  0x1b8898324  _pthread_wqthread + 228
A linker snapshot was created at:
	/tmp/libigraph.3.0.0.dylib-2022-10-02-195930.ld-snapshot
ld: Assertion failed: (_file->_atomsArrayCount == computedAtomCount && "more atoms allocated than expected"), function parse, file macho_relocatable_file.cpp, line 2061.
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

I cannot reproduce this when linking a trivial one-file C++ program, and I could not yet track down what precisely causes the problem. My main machine is the Intel one (where everything works fine), and it's not always convenient for me to use the M1 one.

Notes:

• I have the latest gcc12 port installed (as of today).
• The same happens with gcc11.

[cjones051073 (Chris Jones)]

We are running precisely the main Darwin developers branches for gcc 10,11, and 12 these days.

​https://github.com/iains

I suggest you file an issue against one of the versions there, say the gcc 12 branch

​https://github.com/iains/gcc-12-branch/issues

and see what he says.

[szhorvat (Szabolcs Horvát)]

Reported here: ​https://github.com/iains/gcc-12-branch/issues/11

[mouse07410 (Mouse)]

This crash does happen on Intel Mac running Monterey 12.6.1 and Xcode-14.0.1. Current Macports. gcc12 @12.2.0_0+stdlib_flag (active).

Linker crashes with:

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: file: polynomi.o has no symbols
0  0x105e0affa  __assert_rtn + 139
1  0x105c3e28d  mach_o::relocatable::Parser<x86_64>::parse(mach_o::relocatable::ParserOptions const&) + 4989
2  0x105c2ef8f  mach_o::relocatable::Parser<x86_64>::parse(unsigned char const*, unsigned long long, char const*, long, ld::File::Ordinal, mach_o::relocatable::ParserOptions const&) + 207
3  0x105ca59d4  ld::tool::InputFiles::makeFile(Options::FileInfo const&, bool) + 2036
4  0x105ca8fa0  ___ZN2ld4tool10InputFilesC2ER7Options_block_invoke + 48
5  0x7ff812a8134a  _dispatch_client_callout2 + 8
6  0x7ff812a928f5  _dispatch_apply_invoke + 213
7  0x7ff812a81317  _dispatch_client_callout + 8
8  0x7ff812a90c0c  _dispatch_root_queue_drain + 673
9  0x7ff812a9125c  _dispatch_worker_thread2 + 160
10  0x7ff812c34f8a  _pthread_wqthread + 256
A linker snapshot was created at:
	/tmp/libcryptopp.dylib-2022-11-01-114807.ld-snapshot
ld: Assertion failed: (_file->_atomsArrayCount == computedAtomCount && "more atoms allocated than expected"), function parse, file macho_relocatable_file.cpp, line 2061.
collect2: error: ld returned 1 exit status
make: *** [libcryptopp.dylib] Error 1

To my surprise, there's no crash report in the system log. I will attach linker snapshot /tmp/ui-r7-2022-11-01-145806.ld-snapshot.

[mouse07410 (Mouse)]

/tmp/ui-r7-2022-11-01-145806.ld-snapshot

[kencu (Ken)]

It's a known issue with gcc and certain Xcodes, including 14.0.1 I believe.

See: ​https://github.com/iains/gcc-12-branch/issues/6

[cjones051073 (Chris Jones)]

This is a bug with Xcode/CLT 14.0.x and thus nothing much we can do from the macPorts side. Best solution is to update to Xcode 14.1, or if this is not an option (an older OS) downgrade to Xcode 13.x.

[szhorvat (Szabolcs Horvát)]

Xcode 14.1 is now released so I think this can be closed.

[kencu (Ken)]

fixed by Apple :)

[mouse07410 (Mouse)]

Upgrading Xcode to 14.1 resolved this problem, like was suggested in the upstream. I concur - we can close this.