[Bf-blender-cvs] [bf6a9d705f1] blender-v3.3-release: GLibC Compat: Add deprecated memory hooks symbols removed from 2.34.

[Bastien Montagne]

Commit: bf6a9d705f1fbf3e0167855aefe55f097f413d07
Author: Bastien Montagne
Date:   Mon Sep 12 15:23:42 2022 +0200
Branches: blender-v3.3-release
https://developer.blender.org/rBbf6a9d705f1fbf3e0167855aefe55f097f413d07

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__ */