[libcxx-dev] Problem installing libcxx and libcxxabi using Bootstrapping on Amazon Linux 2

[Hasan Marzooq via libcxx-dev]

Hi.

I'm trying to build and install libcxx and libcxxabi using the Bootstrapping
<https://libcxx.llvm.org/BuildingLibcxx.html> method on Amazon Linux 2.
Both ibcxx and libcxxabi libraries are prerequisites to build and install a
plv8 <https://plv8.github.io/> extension which is my ultimate objective.

While doing the build of plv8 I'm getting below error:

----
/bin/ld: cannot find -lc++
collect2: error: ld returned 1 exit status
make: *** [plv8-3.0.0.so] Error 1
----

Below are the three observations I noted from the logs of installing and
running tests as mentioned in Bootstrapping method

1) Install logs for libcxx and libcxxabi:

-- Set runtime path of "/usr/local/lib/x86_64-unknown-linux/libc++.so.1.0"
to ""

-----
[root at ip-1-1-1-1 ~]# readelf -d
/usr/local/lib/x86_64-unknown-linux/libc++.so.1.0 | grep -E
'NEEDED|RUNPATH|RPATH'
 0x0000000000000001 (NEEDED)             Shared library: [libpthread.so.0]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libm.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [librt.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libgcc_s.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libatomic.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libc++abi.so.1]

[root at ip-1-1-1-1 ~]# ldd /usr/local/lib/x86_64-unknown-linux/libc++.so.1.0
        linux-vdso.so.1 (0x00007ffc0e5a8000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fa8a5901000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fa8a5556000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fa8a5216000)
        librt.so.1 => /lib64/librt.so.1 (0x00007fa8a500e000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fa8a4df8000)
        libatomic.so.1 => /lib64/libatomic.so.1 (0x00007fa8a4bf0000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fa8a5df0000)
        libc++abi.so.1 => not found
-----

2) Some tests are failing:
----
Testing Time: 3051.59s
  Unsupported      :  498
  Passed           : 7026
  Expectedly Failed:   53
  Failed           :   45
----

3) Build log is showing:

"Could not find ParallelSTL, libc++abi will not attempt to use it but the
build may fail if the libc++ in use needs it to be available."


Below are the details and logs while building libcxx and libcxxabi using
Bootstrapping method:

Configure:
cmake -G Ninja -S llvm -B build -DLLVM_ENABLE_PROJECTS="clang"
-DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi"
-DLLVM_RUNTIME_TARGETS="x86_64-unknown-linux" -DLLVM_PARALLEL_LINK_JOBS=1
-DCMAKE_BUILD_TYPE=Release

Logs available here
<https://drive.google.com/file/d/1TzGVx29yvGrQe054_P6eERrrGyDnlpM3/view?usp=sharing>
:

Build:
ninja-build -C build runtimes
Logs available here
<https://drive.google.com/file/d/1H5r2-wgY5vzcnRI8Pm_THxJGwB0xhGQY/view?usp=sharing>
:

Test:
ninja -C build check-runtimes
Logs available here
<https://drive.google.com/file/d/1amXKqczAqVivloSH2HLiKsD3JPRg_Sy-/view?usp=sharing>
:

Install:
ninja-build -C build install-runtimes
Logs available here
<https://drive.google.com/file/d/1mWr236g_3vgypWpBAGZkXFjXhcaRECbl/view?usp=sharing>
:

Machine info:
cat /proc/version
Linux version 4.14.252-195.483.amzn2.x86_64 (mockbuild at ip-10-0-32-100) (gcc
version 7.3.1 20180712 (Red Hat 7.3.1-13) (GCC))

I've been struggling with this for the last few days but kind of stuck at
this stage. Therefore, any help is highly appreciated!


Thanks
Naqvi
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