diff options
| author | Paul Eggert <eggert@cs.ucla.edu> | 2016-07-15 13:07:09 +0200 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2016-07-15 21:27:05 +0200 |
| commit | e95b023163e96538b15f030b7176b7ec59cf86f5 (patch) | |
| tree | c0ad4b151e8740015949c0aa868deaee14dc8582 /configure.ac | |
| parent | 098d29af10a869e65a36804579f16edc49aabcfa (diff) | |
Port to glibc 2.24 (pre-release) + ppc64
Inspired by a suggestion by Florian Weimer in:
https://sourceware.org/ml/libc-alpha/2016-07/msg00425.html
* configure.ac (HAVE_PERSONALITY_ADDR_NO_RANDOMIZE):
Rename from HAVE_PERSONALITY_LINUX32, and check for
ADDR_NO_RANDOMIZE (the crucial thing) instead of for LINUX32.
All uses changed.
* src/emacs.c (main) [HAVE_PERSONALITY_ADDR_NO_RANDOMIZE]:
Use ADDR_NO_RANDOMIZE from personality.h rather than inventing the
flag ourselves. Just set that flag, rather than also setting the
persona. When doing it, avoid functions like putenv that may
allocate memory.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/configure.ac b/configure.ac index dd1af5b435..c94ecb629e 100644 --- a/configure.ac +++ b/configure.ac @@ -1643,15 +1643,17 @@ AC_CHECK_HEADERS_ONCE( sys/resource.h sys/utsname.h pwd.h utmp.h util.h) -AC_MSG_CHECKING(if personality LINUX32 can be set) -AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/personality.h>]], [[personality (PER_LINUX32)]])], - emacs_cv_personality_linux32=yes, - emacs_cv_personality_linux32=no) -AC_MSG_RESULT($emacs_cv_personality_linux32) - -if test $emacs_cv_personality_linux32 = yes; then - AC_DEFINE(HAVE_PERSONALITY_LINUX32, 1, - [Define to 1 if personality LINUX32 can be set.]) +AC_CACHE_CHECK([for ADDR_NO_RANDOMIZE], + [emacs_cv_personality_addr_no_randomize], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[#include <sys/personality.h>]], + [[personality (personality (0xffffffff) + | ADDR_NO_RANDOMIZE)]])], + [emacs_cv_personality_addr_no_randomize=yes], + [emacs_cv_personality_addr_no_randomize=no])]) +if test $emacs_cv_personality_addr_no_randomize = yes; then + AC_DEFINE([HAVE_PERSONALITY_ADDR_NO_RANDOMIZE], [1], + [Define to 1 if personality flag ADDR_NO_RANDOMIZE exists.]) fi # Note that Solaris has sys/sysinfo.h which defines struct |