Source package is failing to build for different reasons:
1)
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-- Check for working C compiler: /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/./bin/clang
-- Check for working C compiler: /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/./bin/clang - broken
CMake Error at /usr/share/cmake-3.28/Modules/CMakeTestCCompiler.cmake:67 (message):
The C compiler
"/<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/./bin/clang"
is not able to compile a simple test program.
It fails with the following output:
Change Dir: '/<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/tools/clang/runtime/compiler-rt-bins/CMakeFiles/CMakeScratch/TryCompile-k2BXY5'
Run Build Command(s): /usr/bin/ninja -v cmTC_45db0
[1/2][ 50%][0.017s] /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/./bin/clang -g -O2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -ffile-prefix-map=/<<PKGBUILDDIR>>=. -flto=auto -ffat-lto-objects -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fdebug-prefix-map=/<<PKGBUILDDIR>>=/usr/src/swiftlang-5.6.3-3 -MD -MT CMakeFiles/cmTC_45db0.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_45db0.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_45db0.dir/testCCompiler.c.o -c /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/tools/clang/runtime/compiler-rt-bins/CMakeFiles/CMakeScratch/TryCompile-k2BXY5/testCCompiler.c
clang-13: warning: optimization flag '-ffat-lto-objects' is not supported [-Wignored-optimization-argument]
[2/2][100%][0.029s] : && /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/./bin/clang -g -O2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -ffile-prefix-map=/<<PKGBUILDDIR>>=. -flto=auto -ffat-lto-objects -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fdebug-prefix-map=/<<PKGBUILDDIR>>=/usr/src/swiftlang-5.6.3-3 -Wl,-Bsymbolic-functions -flto=auto -ffat-lto-objects -Wl,-z,relro CMakeFiles/cmTC_45db0.dir/testCCompiler.c.o -o cmTC_45db0 && :
FAILED: cmTC_45db0
: && /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/./bin/clang -g -O2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -ffile-prefix-map=/<<PKGBUILDDIR>>=. -flto=auto -ffat-lto-objects -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fdebug-prefix-map=/<<PKGBUILDDIR>>=/usr/src/swiftlang-5.6.3-3 -Wl,-Bsymbolic-functions -flto=auto -ffat-lto-objects -Wl,-z,relro CMakeFiles/cmTC_45db0.dir/testCCompiler.c.o -o cmTC_45db0 && :
/usr/bin/ld: /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/bin/../lib/LLVMgold.so: error loading plugin: /<<PKGBUILDDIR>>/build/buildbot_linux/llvm-linux-x86_64/bin/../lib/LLVMgold.so: cannot open shared object file: No such file or directory
clang-13: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
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This issue can be workaround by disabling LTO.
With LTO disabled, the build will proceed and fail to due strlcat and strlcpy, which the upstream project implements and are now also present in the new glibc.
With a few patches I got it working on amd64.
The build fails on arm64 though, the swift compiler itself crashes during the build and the problem appears to be in the vendored LLVM 13 code.
I put it in a PPA here https:/