[Bf-blender-cvs] [16af35054dc] master: GLibC Compat: Add deprecated memory hooks symbols removed from 2.34.

[Bastien Montagne]

Commit: 16af35054dc75fbfaf4bfc365d7223d8fdb23f01
Author: Bastien Montagne
Date:   Mon Sep 12 15:23:42 2022 +0200
Branches: master
https://developer.blender.org/rB16af35054dc75fbfaf4bfc365d7223d8fdb23f01

GLibC Compat: Add deprecated memory hooks symbols removed from 2.34.

Starting from GLibC 2.34, deprecated `__malloc_hook` & co. have been
removed from headers, while still present in the shared library itself.

This means that it is no more possible to build Blender with USD 22.03
on recent linux systems.

While USD 22.08 has a fix to this issue, it is unlikely to be upgraded
for Blender 3.4, and definitely not for Blender 3.3.

This commit ensures Blender can build with USD 22.03 and glibc >= 2.34.

Ref.: T99618,
https://devtalk.blender.org/t/building-blender-on-linux-using-glibc-2-34-raises-linking-errors-from-the-usd-library/24185

Patch by @brecht, many thanks.

===================================================================

M	intern/libc_compat/libc_compat.c

===================================================================

diff --git a/intern/libc_compat/libc_compat.c b/intern/libc_compat/libc_compat.c
index 5b969d80501..626490aa8e2 100644
--- a/intern/libc_compat/libc_compat.c
+++ b/intern/libc_compat/libc_compat.c
@@ -12,6 +12,7 @@
 #ifdef __linux__
 #  include <features.h>
 #  include <math.h>
+#  include <stdlib.h>
 
 #  if defined(__GLIBC_PREREQ)
 #    if __GLIBC_PREREQ(2, 31)
@@ -114,5 +115,15 @@ float __powf_finite(float x, float y)
 }
 
 #    endif /* __GLIBC_PREREQ(2, 31) */
-#  endif   /* __GLIBC_PREREQ */
-#endif     /* __linux__ */
+
+#    if __GLIBC_PREREQ(2, 34)
+
+void *(*__malloc_hook)(size_t __size, const void *) = NULL;
+void *(*__realloc_hook)(void *__ptr, size_t __size, const void *) = NULL;
+void *(*__memalign_hook)(size_t __alignment, size_t __size, const void *) = NULL;
+void (*__free_hook)(void *__ptr, const void *) = NULL;
+
+#    endif /* __GLIBC_PREREQ(2, 34) */
+
+#  endif /* __GLIBC_PREREQ */
+#endif   /* __linux__ */