Can generate config headers without an input file. Closes #549.

1 files changed, 21 insertions, 0 deletions

diff --git a/mesonbuild/mesonlib.py b/mesonbuild/mesonlib.py
index fe831bd..584b3b2 100644
--- a/mesonbuild/mesonlib.py
+++ b/mesonbuild/mesonlib.py
@@ -267,6 +267,27 @@ def do_conf_file(src, dst, confdata):
     shutil.copymode(src, dst_tmp)
     replace_if_different(dst, dst_tmp)
 
+def dump_conf_header(ofilename, cdata):
+    with open(ofilename, 'w') as ofile:
+        ofile.write('''/*
+ * Autogenerated by the Meson build system.
+ * Do not edit, your changes will be lost.
+ */
+
+#pragma once
+
+''')
+        for k in sorted(cdata.keys()):
+            v = cdata.get(k)
+            if isinstance(v, bool):
+                if v:
+                    ofile.write('#define %s\n\n' % k)
+                else:
+                    ofile.write('#undef %s\n\n' % k)
+            elif isinstance(v, (int, str)):
+                ofile.write('#define %s %s\n\n' % (k, v))
+            else:
+                raise MesonException('Unknown data type in configuration file entry: ' + k)
 
 def replace_if_different(dst, dst_tmp):
     # If contents are identical, don't touch the file to prevent