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, 19 insertions, 0 deletions

diff --git a/mesonbuild/interpreter.py b/mesonbuild/interpreter.py
index 0a88ce4..d6a3a3e 100644
--- a/mesonbuild/interpreter.py
+++ b/mesonbuild/interpreter.py
@@ -575,6 +575,7 @@ class CompilerHolder(InterpreterObject):
                              'get_id': self.get_id_method,
                              'sizeof': self.sizeof_method,
                              'has_header': self.has_header_method,
+                             'has_header_symbol': self.has_header_symbol_method,
                              'run' : self.run_method,
                              'has_function' : self.has_function_method,
                              'has_member' : self.has_member_method,
@@ -752,6 +753,24 @@ class CompilerHolder(InterpreterObject):
         mlog.log('Has header "%s":' % string, h)
         return haz
 
+    def has_header_symbol_method(self, args, kwargs):
+        if len(args) != 2:
+            raise InterpreterException('has_header_symbol method takes exactly two arguments.')
+        check_stringlist(args)
+        hname = args[0]
+        symbol = args[1]
+        prefix = kwargs.get('prefix', '')
+        if not isinstance(prefix, str):
+            raise InterpreterException('Prefix argument of has_function must be a string.')
+        extra_args = self.determine_args(kwargs)
+        haz = self.compiler.has_header_symbol(hname, symbol, prefix, extra_args)
+        if haz:
+            h = mlog.green('YES')
+        else:
+            h = mlog.red('NO')
+        mlog.log('Header <{0}> has symbol "{1}":'.format(hname, symbol), h)
+        return haz
+
     def find_library_method(self, args, kwargs):
         if len(args) != 1:
             raise InterpreterException('find_library method takes one argument.')