Haiku builds are not officially supported, i.e. the build might not work at all, some tests may fail and some sub-projects are excluded from build.
This manual outlines Haiku-specific setup. For general building and testing instructions see "BUILDING" and "Building and Testing changes".
pkgman install llvm9_clang ninja cmake doxygen libjpeg_turbo_devel giflib_develTEST_STACK_LIMIT=none CMAKE_FLAGS="-I/boot/system/develop/tools/lib/gcc/x86_64-unknown-haiku/8.3.0/include/c++ -I/boot/system/develop/tools/lib/gcc/x86_64-unknown-haiku/8.3.0/include/c++/x86_64-unknown-haiku" CMAKE_SHARED_LINKER_FLAGS="-shared -Xlinker -soname=libjpegxl.so -lpthread" ./ci.sh opt