opal/memory: disable __malloc_initialize_hook if poisoned

Newer versions of gcc have "poisoned" the __malloc_initialize_hook
name and it can no longer be used. Added a configure check and
protection around its usage.

Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>

configure.ac

@@ -854,7 +854,7 @@ OPAL_SEARCH_LIBS_CORE([ceil], [m])
 # -lrt might be needed for clock_gettime
 OPAL_SEARCH_LIBS_CORE([clock_gettime], [rt])
 
-AC_CHECK_FUNCS([asprintf snprintf vasprintf vsnprintf openpty isatty getpwuid fork waitpid execve pipe ptsname setsid mmap tcgetpgrp posix_memalign strsignal sysconf syslog vsyslog regcmp regexec regfree _NSGetEnviron socketpair strncpy_s usleep mkfifo dbopen dbm_open statfs statvfs setpgid setenv])
+AC_CHECK_FUNCS([asprintf snprintf vasprintf vsnprintf openpty isatty getpwuid fork waitpid execve pipe ptsname setsid mmap tcgetpgrp posix_memalign strsignal sysconf syslog vsyslog regcmp regexec regfree _NSGetEnviron socketpair strncpy_s usleep mkfifo dbopen dbm_open statfs statvfs setpgid setenv __malloc_initialize_hook])
 
 # Sanity check: ensure that we got at least one of statfs or statvfs.
 if test $ac_cv_func_statfs = no && test $ac_cv_func_statvfs = no; then

ompi/runtime/ompi_mpi_init.c

@@ -99,6 +99,8 @@
 #endif
 #include "ompi/runtime/ompi_cr.h"
 
+/* newer versions of gcc have poisoned this deprecated feature */
+#if HAVE___MALLOC_INITIALIZE_HOOK
 #include "opal/mca/memory/base/base.h"
 /* So this sucks, but with OPAL in its own library that is brought in
    implicity from libmpi, there are times when the malloc initialize
@@ -106,6 +108,7 @@
    from here, since any MPI code is going to call MPI_Init... */
 OPAL_DECLSPEC void (*__malloc_initialize_hook) (void) =
     opal_memory_base_malloc_init_hook;
+#endif
 
 /* This is required for the boundaries of the hash tables used to store
  * the F90 types returned by the MPI_Type_create_f90_XXX functions.