(XASSERTS): Define to 0 if not already defined.

(xassert) [!XASSERTS]: Define dummy version.

1 files changed, 11 insertions, 1 deletions

diff --git a/src/dispextern.h b/src/dispextern.h
index aa296e12340..1d8c1402c81 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -119,6 +119,13 @@ enum window_part
 #define GLYPH_DEBUG 0
 #endif
 
+/* If XASSERTS is non-zero, additional consistency checks are activated.
+   Turn it off by defining the macro XASSERTS to zero.  */
+
+#ifndef XASSERTS
+#define XASSERTS 0
+#endif
+
 /* Macros to include code only if GLYPH_DEBUG != 0.  */
 
 #if GLYPH_DEBUG
@@ -127,8 +134,11 @@ enum window_part
 #define IF_DEBUG(X)     (void) 0
 #endif
 
-/* Maybe move this inside the above `#ifdef GLYPH_DEBUG' for release.  */
+#if XASSERTS
 #define xassert(X)      do {if (!(X)) abort ();} while (0)
+#else
+#define xassert(X)      (void) 0
+#endif
 
 /* Macro for displaying traces of redisplay.  If Emacs was compiled
    with GLYPH_DEBUG != 0, the variable trace_redisplay_p can be set to