2 files changed, 55 insertions, 0 deletions
diff --git a/meson/test cases/common/32 has header/meson.build b/meson/test cases/common/32 has header/meson.build
new file mode 100644
index 000000000..8096763a9
--- /dev/null
+++ b/meson/test cases/common/32 has header/meson.build
@@ -0,0 +1,54 @@
+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 <stdlib.h>' + 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 <windows.h>' + 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 <linux/if.h>')
+    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 non-existent header.')
+  endforeach
+endforeach
diff --git a/meson/test cases/common/32 has header/ouagadougou.h b/meson/test cases/common/32 has header/ouagadougou.h
new file mode 100644
index 000000000..2f76c49cc
--- /dev/null
+++ b/meson/test cases/common/32 has header/ouagadougou.h
@@ -0,0 +1 @@
+#define OMG_THIS_SHOULDNT_BE_FOUND