[Linux][ppc64le] Failed to compile with clang

[runlevel5]

$ clang --version
clang version 20.1.8 (Fedora 20.1.8-1.fc43)
Target: ppc64le-redhat-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Configuration file: /etc/clang/ppc64le-redhat-linux-gnu-clang.cfg
$ cmake -DCMAKE_BUILD_TYPE=Debug -G "Unix Makefiles" -DDXC_SPIRV_PATH=/home/tle/.local/bin/dxc -DUSE_PRECOMPILED_HEADERS=OFF -DOPENAL=ON -DUSE_SYSTEM_ZLIB=ON -DUSE_SYSTEM_RAPIDJSON=ON -DONATIVE=ON -DFFMPEG=ON -DBINKDEC=OFF ../neo && make -j32

See full error log at https://gist.github.com/runlevel5/5a3876d7e35f5f2a8ab49d1fb6a38fd9

[SRSaunders]

@runlevel5 there is something bad happening with your clang compiler:

/home/tle/Work/RBDOOM-3-BFG/neo/idlib/sys/sys_intrinsics.h:47:24: error: definition of builtin function '__builtin_fmaf'
   47 | ID_INLINE_EXTERN float __fmadds( float a, float b, floIn file included from a/home/tle/Work/RBDOOM-3-BFG/neo/idlib/CommandLink.cppt:29 :
cIn file included from  /home/tle/Work/RBDOOM-3-BFG/neo/idlib/precompiled.h):37
:
      | /home/tle/Work/RBDOOM-3-BFG/neo/idlib/sys/sys_intrinsics.h:                       ^47
:24: <built-in>:error: 532:18definition of builtin function '__builtin_fmaf': 
note: expanded from macro '__fmadds'
   47 | ID_INLINE  _532E | X#TdEeRfNi nef l_o_aftma d_d_sf m_a_dbdusi(l tifnl_ofamtaf a
,       | f                 ^l
oat b, float c )

The sys_intrinsics.h macro expansion from the game's __fmadds() to clang's builtin __builtin_fmaf() is not working. The expansion results in garbage as seen in the final lines above. Is clang installed correctly on your system?

[runlevel5]

The sys_intrinsics.h macro expansion from the game's __fmadds() to clang's builtin __builtin_fmaf() is not working. The expansion results in garbage as seen in the final lines above. Is clang installed correctly on your system?

Well it's the default installation of Fedora, dnf install clang. I did not make any change to clang / llvm config at all