Re: lang/libunwind failing on Alma (RHEL) 8

[Jason Bacon <jtocino%gmx.com@localhost>]

On 1/18/24 17:36, Jason Bacon wrote:
> Heads-up to anyone interested.  I'll look into this eventually if nobody
> else fixes it first, but I can't say when I'll have time.
>
> "cannot find -lgcc_s" is a fairly common problem, but I don't recall the
> solution off the top of my head.
>
> -- Check for working C compiler:
> /home/bacon/Pkgsrc/pkgsrc/lang/libunwind/work/.cwrapper/bin/cc - broken
> CMake Error at
> /home/bacon/Pkgsrc/pkg/share/cmake-3.28/Modules/CMakeTestCCompiler.cmake:67
> (message):
>    The C compiler
>
>
>
>      "/home/bacon/Pkgsrc/pkgsrc/lang/libunwind/work/.cwrapper/bin/cc"
>
>
>
>    is not able to compile a simple test program.
>
>
>
>    It fails with the following output:
>
>
>
>      Change Dir:
> '/home/bacon/Pkgsrc/pkgsrc/lang/libunwind/work/libunwind-16.0.6.src/cmake-pkgsrc-build/CMakeFiles/CMakeScratch/TryCompile-OKRmj3'
>
>
>
>      Run Build Command(s): /home/bacon/Pkgsrc/pkg/bin/cmake -E env
> VERBOSE=1 /home/bacon/Pkgsrc/pkg/bin/gmake -f Makefile cmTC_1e7e7/fast
>
>      make  -f CMakeFiles/cmTC_1e7e7.dir/build.make
> CMakeFiles/cmTC_1e7e7.dir/build
>
>      Building C object CMakeFiles/cmTC_1e7e7.dir/testCCompiler.c.o
>
>      /home/bacon/Pkgsrc/pkgsrc/lang/libunwind/work/.cwrapper/bin/cc
> -O2 -I/home/bacon/Pkgsrc/pkg/include -I/usr/include -o
> CMakeFiles/cmTC_1e7e7.dir/testCCompiler.c.o -c
> /home/bacon/Pkgsrc/pkgsrc/lang/libunwind/work/libunwind-16.0.6.src/cmake-pkgsrc-build/CMakeFiles/CMakeScratch/TryCompile-OKRmj3/testCCompiler.c
>
>      Linking C executable cmTC_1e7e7
>
>      /home/bacon/Pkgsrc/pkg/bin/cmake -E cmake_link_script
> CMakeFiles/cmTC_1e7e7.dir/link.txt --verbose=1
>
>      /home/bacon/Pkgsrc/pkgsrc/lang/libunwind/work/.cwrapper/bin/cc -O2
> -I/home/bacon/Pkgsrc/pkg/include -I/usr/include
> -L/home/bacon/Pkgsrc/pkg/gcc10/lib/gcc/x86_64-redhat-linux/10.5.0
> -Wl,-R/home/bacon/Pkgsrc/pkg/gcc10/lib/gcc/x86_64-redhat-linux/10.5.0
> -L/home/bacon/Pkgsrc/pkg/gcc10/lib64
> -Wl,-R/home/bacon/Pkgsrc/pkg/gcc10/lib64 -Wl,-zrelro
> -L/home/bacon/Pkgsrc/pkg/lib -Wl,-R/home/bacon/Pkgsrc/pkg/lib
> -L/usr/lib64 -Wl,-R/usr/lib64  -rdynamic
> CMakeFiles/cmTC_1e7e7.dir/testCCompiler.c.o -o cmTC_1e7e7
>
>      /usr/bin/ld: cannot find -lgcc_s
>
>      collect2: error: ld returned 1 exit status
>
>      *** Error code 1
>
>
>
>      Stop.
>
>      make[1]: stopped in
> /home/bacon/Pkgsrc/pkgsrc/lang/libunwind/work/libunwind-16.0.6.src/cmake-pkgsrc-build/CMakeFiles/CMakeScratch/TryCompile-OKRmj3
>
>      gmake: *** [Makefile:127: cmTC_1e7e7/fast] Error 1
>
>
>
>
>
>
>
>
>
>
>
>    CMake will not be able to correctly generate this project.
>
> Call Stack (most recent call first):
>
>    CMakeLists.txt
>
>
>
>
>
> -- Configuring incomplete, errors occurred!
> *** Error code 1
>
> Stop.
> bmake[7]: stopped in /home/bacon/Pkgsrc/pkgsrc/lang/libunwind
> *** Error code 1

FYI, I plan to commit the following patch as a stop-gap, unless there 
are any objections and suggestions. I don't know if this problem exists 
on other Linux distros, so I'm limiting the fix to RHEL derivatives.

--- Makefile    6 Oct 2023 19:15:21 -0000       1.34
+++ Makefile    23 Feb 2024 13:05:21 -0000
@@ -22,7 +22,13 @@
 USE_LANGUAGES=         c c++
 USE_TOOLS+=            pax
 SSP_SUPPORTED=         no
+
+.include "../../mk/bsd.prefs.mk"
+
+# Configure fails on Alma8 with "/usr/bin/ld: cannot find -lgcc_s"
+.if ${OPSYS} != Linux || !exists(/etc/redhat-release)
 GCC_REQD+=             10      # must be in sync with libcxx
+.endif

 CMAKE_ARGS+=   -DCMAKE_BUILD_TYPE=Release