Bug#941817: llvm-toolchain-8: FTBFS on x32

[Sylvestre Ledru]

Le 06/10/2019 à 02:59, Thorsten Glaser a écrit :
> On Sun, 6 Oct 2019, Thorsten Glaser wrote:
>
>> … which is caused by:
>>
>> cc1: error: unrecognized argument to '-flto=' option: 'thin'
>>
>> Somehow, the build system applies -flto=thin to the host compiler,
>> and GCC doesn’t support this flag.
> This is but the first error. When I comment out the LTO line
> in d/rules the build continues for hours but then:
>
>
> […]
> clang-8: note: diagnostic msg:
> ********************
>
> PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
> Preprocessed source(s) and associated run script(s) are located at:
> clang-8: note: diagnostic msg: /tmp/ManagedStatic-201574.cpp
> clang-8: note: diagnostic msg: /tmp/ManagedStatic-201574.sh
> clang-8: note: diagnostic msg:
>
> ********************
> make[8]: *** [lib/Support/CMakeFiles/LLVMSupport.dir/build.make:794: lib/Support/CMakeFiles/LLVMSupport.dir/ManagedStatic.cpp.o] Error 70
>
Interesting, this isn't the same error as in the CI.

https://buildd.debian.org/status/fetch.php?pkg=llvm-toolchain-8&arch=x32&ver=1%3A8.0.1-3&stamp=1565281145&raw=0

where the error is:

     /<<PKGBUILDDIR>>/build-llvm/./bin/clang  -fuse-ld=gold -fPIC -Wno-unused-command-line-argument -Wno-unknown-warning-option   -fuse-ld=gold -fPIC -Wno-unused-command-line-argument -Wno-unknown-warning-option -Wl,--build-id  CMakeFiles/cmTC_1e221.dir/testCCompiler.c.o  -o cmTC_1e221
     /usr/bin/ld.gold: error: cannot open crt1.o: No such file or directory
     /usr/bin/ld.gold: error: cannot open crti.o: No such file or directory
     /usr/bin/ld.gold: error: cannot open crtbegin.o: No such file or directory
     /usr/bin/ld.gold: error: cannot open crtend.o: No such file or directory
     /usr/bin/ld.gold: error: cannot open crtn.o: No such file or directory
     /usr/bin/ld.gold: error: cannot find -lgcc
     /usr/bin/ld.gold: error: cannot find -lgcc_s
     /usr/bin/ld.gold: error: cannot find -lgcc
     /usr/bin/ld.gold: error: cannot find -lgcc_s
     clang-8: error: linker command failed with exit code 1 (use -v to see invocation)

Which should be easy to fix (I guess it is a missing path in|clang/lib/Driver/ToolChains/Gnu.c ) I don't have the bandwidth in the 
next month to manage non official arch but I will be happy to take a 
patch or to guide. About the lto issue, it is fixed in the branch 9 (I 
am focussing my time on this branch): 
https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/commit/2a58c5d841443533b00997207827b2576855a6a7 
https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/commit/c6417dbaeffc915fca275d4aa7038cdf7f3e17b7 
Cheers, Sylvestre |

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