New API: cc.has_header_symbol to check if a header defines a specific symbol

Also supports a 'prefix' keyword argument for feature checks such as _GNU_SOURCE
or for headers that need to be included first

1 files changed, 18 insertions, 0 deletions

diff --git a/test cases/common/111 has header symbol/meson.build b/test cases/common/111 has header symbol/meson.build
new file mode 100644
index 0000000..e0afb42
--- /dev/null
+++ b/test cases/common/111 has header symbol/meson.build
@@ -0,0 +1,18 @@
+project('has header symbol', 'c')
+
+cc = meson.get_compiler('c')
+
+assert (cc.has_header_symbol('stdio.h', 'int'), 'base types should always be available')
+assert (cc.has_header_symbol('stdio.h', 'printf'), 'printf function not found')
+assert (cc.has_header_symbol('stdio.h', 'FILE'), 'FILE structure not found')
+assert (cc.has_header_symbol('limits.h', 'INT_MAX'), 'INT_MAX define not found')
+assert (not cc.has_header_symbol('limits.h', 'guint64'), 'guint64 is not defined in limits.h')
+assert (not cc.has_header_symbol('stdlib.h', 'FILE'), 'FILE structure is defined in stdio.h, not stdlib.h')
+assert (not cc.has_header_symbol('stdlol.h', 'printf'), 'stdlol.h shouldn\'t exist')
+assert (not cc.has_header_symbol('stdlol.h', 'int'), 'shouldn\'t be able to find "int" with invalid header')
+
+# This is likely only available on Glibc, so just test for it
+if cc.has_function('ppoll')
+  assert (not cc.has_header_symbol('poll.h', 'ppoll'), 'ppoll should not be accessible without _GNU_SOURCE')
+  assert (cc.has_header_symbol('poll.h', 'ppoll', prefix : '#define _GNU_SOURCE'), 'ppoll should be accessible with _GNU_SOURCE')
+endif