Determining if the include file ass/ass.h exists failed with the following output: Change Dir: /var/tmp/portage/media-libs/qtav-1.12.0-r2/work/qtav-1.12.0_build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/ninja cmTC_d3ee1 && [1/2] Building C object CMakeFiles/cmTC_d3ee1.dir/CheckIncludeFile.c.o FAILED: CMakeFiles/cmTC_d3ee1.dir/CheckIncludeFile.c.o /usr/lib/llvm/10/bin/x86_64-pc-linux-gnu-clang -O2 -pipe -march=native -frecord-gcc-switches -fno-diagnostics-color -fPIE -MD -MT CMakeFiles/cmTC_d3ee1.dir/CheckIncludeFile.c.o -MF CMakeFiles/cmTC_d3ee1.dir/CheckIncludeFile.c.o.d -o CMakeFiles/cmTC_d3ee1.dir/CheckIncludeFile.c.o -c CheckIncludeFile.c CheckIncludeFile.c:1:10: fatal error: 'ass/ass.h' file not found #include ^~~~~~~~~~~ 1 error generated. ninja: build stopped: subcommand failed. Determining if files AL/al.h exist failed with the following output: Change Dir: /var/tmp/portage/media-libs/qtav-1.12.0-r2/work/qtav-1.12.0_build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/ninja cmTC_978c8 && [1/2] Building C object CMakeFiles/cmTC_978c8.dir/HAVE_AL_H.c.o FAILED: CMakeFiles/cmTC_978c8.dir/HAVE_AL_H.c.o /usr/lib/llvm/10/bin/x86_64-pc-linux-gnu-clang -I/var/tmp/portage/media-libs/qtav-1.12.0-r2/work/QtAV-1.12.0/external/include -I/var/tmp/portage/media-libs/qtav-1.12.0-r2/work/QtAV-1.12.0/contrib/capi -O2 -pipe -march=native -frecord-gcc-switches -fno-diagnostics-color -fPIE -MD -MT CMakeFiles/cmTC_978c8.dir/HAVE_AL_H.c.o -MF CMakeFiles/cmTC_978c8.dir/HAVE_AL_H.c.o.d -o CMakeFiles/cmTC_978c8.dir/HAVE_AL_H.c.o -c /var/tmp/portage/media-libs/qtav-1.12.0-r2/work/qtav-1.12.0_build/CMakeFiles/CheckIncludeFiles/HAVE_AL_H.c /var/tmp/portage/media-libs/qtav-1.12.0-r2/work/qtav-1.12.0_build/CMakeFiles/CheckIncludeFiles/HAVE_AL_H.c:2:10: fatal error: 'AL/al.h' file not found #include ^~~~~~~~~ 1 error generated. ninja: build stopped: subcommand failed. Source: /* */ #include int main(void){return 0;} Determining if the function slCreateEngine exists in the OpenSLES failed with the following output: Change Dir: /var/tmp/portage/media-libs/qtav-1.12.0-r2/work/qtav-1.12.0_build/CMakeFiles/CMakeTmp Run Build Command(s):/usr/bin/ninja cmTC_786d1 && [1/2] Building C object CMakeFiles/cmTC_786d1.dir/CheckFunctionExists.c.o [2/2] Linking C executable cmTC_786d1 FAILED: cmTC_786d1 : && /usr/lib/llvm/10/bin/x86_64-pc-linux-gnu-clang -O2 -pipe -march=native -frecord-gcc-switches -fno-diagnostics-color -DCHECK_FUNCTION_EXISTS=slCreateEngine -Wl,-O1 -Wl,--as-needed -Wl,--defsym=__gentoo_check_ldflags__=0 -fuse-ld=lld -rdynamic CMakeFiles/cmTC_786d1.dir/CheckFunctionExists.c.o -o cmTC_786d1 -lOpenSLES && : ld.lld: error: unable to find library -lOpenSLES clang-10: error: linker command failed with exit code 1 (use -v to see invocation) ninja: build stopped: subcommand failed.