dplummer

diff -urB a/distro/google-perftools-1.7/src/tcmalloc.cc b/distro/google-perftools-1.7/src/tcmalloc.cc
--- a/distro/google-perftools-1.7/src/tcmalloc.cc
+++ b/distro/google-perftools-1.7/src/tcmalloc.cc
@@ -137,6 +137,13 @@
 # define WIN32_DO_PATCHING 1
 #endif
 
+// GLibc 2.14+ requires the hook functions be declared volatile, based on the value of the
+// define __MALLOC_HOOK_VOLATILE. For compatibility with older/non-GLibc implementations,
+// provide an empty definition.