1 files changed, 20 insertions, 0 deletions
diff --git a/libcpp/directives.c b/libcpp/directives.c
index 3478cd5..bac08ad 100644
--- a/libcpp/directives.c
+++ b/libcpp/directives.c
@@ -2123,6 +2123,26 @@ cpp_define (cpp_reader *pfile, const char *str)
   run_directive (pfile, T_DEFINE, buf, count);
 }
 
+
+/* Use to build macros to be run through cpp_define() as
+   described above.
+   Example: cpp_define_formatted (pfile, "MACRO=%d", value);  */
+
+void
+cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...)
+{
+  char *ptr = NULL;
+
+  va_list ap;
+  va_start (ap, fmt);
+  vasprintf (&ptr, fmt, ap);
+  va_end (ap);
+
+  cpp_define (pfile, ptr);
+  free (ptr);
+}
+
+
 /* Slight variant of the above for use by initialize_builtins.  */
 void
 _cpp_define_builtin (cpp_reader *pfile, const char *str)