project('has header', 'c', 'cpp') host_system = host_machine.system() non_existent_header = 'ouagadougou.h' # Copy it into the builddir to ensure that it isn't found even if it's there configure_file(input : non_existent_header, output : non_existent_header, configuration : configuration_data()) # Test that the fallback to __has_include also works on all compilers if host_system != 'darwin' fallbacks = ['', '\n#undef __has_include'] else # On Darwin's clang you can't redefine builtin macros so the above doesn't work fallbacks = [''] endif foreach fallback : fallbacks foreach comp : [meson.get_compiler('c'), meson.get_compiler('cpp')] assert(comp.has_header('stdio.h', prefix : fallback), 'Stdio missing.') # stdio.h doesn't actually need stdlib.h, but just test that setting the # prefix does not result in an error. assert(comp.has_header('stdio.h', prefix : '#include ' + fallback), 'Stdio missing.') # XInput.h should not require type definitions from windows.h, but it does # require macro definitions. Specifically, it requires an arch setting for # VS2015 at least. # We only do this check on MSVC because MinGW often defines its own wrappers # that pre-include windows.h if comp.get_id() == 'msvc' assert(comp.has_header('XInput.h', prefix : '#include ' + fallback), 'XInput.h should not be missing on Windows') assert(comp.has_header('XInput.h', prefix : '#define _X86_' + fallback), 'XInput.h should not need windows.h') endif # Test that the following GCC bug doesn't happen: # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80005 # https://github.com/mesonbuild/meson/issues/1458 if host_system == 'linux' assert(comp.has_header('linux/if.h', prefix : fallback), 'Could not find ') endif # This header exists in the source and the builddir, but we still must not # find it since we are looking in the system directories. assert(not comp.has_header(non_existent_header, prefix : fallback), 'Found nonexistent header.') endforeach endforeach