* m4/gnulib-common.m4 (gl_COMMON_BODY): Define the macros
_GL_ATTRIBUTE_DEALLOC and _GL_ATTRIBUTE_DEALLOC_FREE. These can
be useful with gcc -Wmismatched-dealloc.
---
ChangeLog | 5 +++++
m4/gnulib-common.m4 | 12 ++++++++++++
2 files changed, 17 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index 7e388c4dd..33a472f5e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
2021-07-30 Paul Eggert <egg...@cs.ucla.edu>
+ gnulib-common: update for gcc -Wmismatched-dealloc
+ * m4/gnulib-common.m4 (gl_COMMON_BODY): Define the macros
+ _GL_ATTRIBUTE_DEALLOC and _GL_ATTRIBUTE_DEALLOC_FREE. These can
+ be useful with gcc -Wmismatched-dealloc.
+
gnulib-common: update for C2x 2020-12-11 draft
Use blessed-by-draft-standard way to test for [[__deprecated__]]
etc.; this is supported by GCC 11 and the fallback code should
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index 347462d1d..2872ecdf7 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -148,6 +148,18 @@ AC_DEFUN([gl_COMMON_BODY], [
# define _GL_ATTRIBUTE_CONST
#endif
+/* _GL_ATTRIBUTE_DEALLOC (F, I) is for functions returning pointers
+ that can be freed by passing them as the Ith argument to the
+ function F. _GL_ATTRIBUTE_DEALLOC_FREE is for functions that
+ return pointers that can be freed via 'free'; it can be used
+ only after including stdlib.h. */
+#if _GL_GNUC_PREREQ (11, 0)
+# define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+#else
+# define _GL_ATTRIBUTE_DEALLOC(f, i)
+#endif
+#define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
+
#if _GL_HAS_C_ATTRIBUTE (deprecated)
# define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
#elif _GL_HAS_ATTRIBUTE (deprecated)
--
2.31.1
