internal: Add CONCAT macro

Using the two-step idiom to force resolution of other macros, e.g.:

  #define bar BAR
  CONCAT_(foo, bar)     // foobar
  CONCAT(foo, bar)      // fooBAR

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/src/internal.h b/src/internal.h
index b6e43325422d1f0123d78221528704dc1fe1e12f..4cfb022b41b5e77f7d048afb5c25d5bae176cd81 100644 (file)
--- a/src/internal.h
+++ b/src/internal.h
@@ -100,6 +100,9 @@
 #define STREQ_NULLABLE(a, b) (g_strcmp0(a, b) == 0)
 #define STRNEQ_NULLABLE(a, b) (g_strcmp0(a, b) != 0)
 
+#define CONCAT_(a, b) a ## b
+#define CONCAT(a, b) CONCAT_(a, b)
+
 #ifdef WIN32
 # ifndef O_CLOEXEC
 #  define O_CLOEXEC _O_NOINHERIT