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m4 ChangeLog configure.ac src/m4.c src/stackovf.c [branch-1_4]
From: |
Eric Blake |
Subject: |
m4 ChangeLog configure.ac src/m4.c src/stackovf.c [branch-1_4] |
Date: |
Thu, 22 Jun 2006 03:29:36 +0000 |
CVSROOT: /sources/m4
Module name: m4
Branch: branch-1_4
Changes by: Eric Blake <ericb> 06/06/22 03:29:36
Modified files:
. : ChangeLog configure.ac
src : m4.c stackovf.c
Log message:
Avoid obsolete sigstack when POSIX sigaltstack is available:
* src/m4.c: Blindly assume signal.h, since stackovf.c and gnulib
do likewise.
* configure.ac (AC_CHECK_HEADERS): Likewise.
(AC_CHECK_TYPES): New check for siginfo_t, since siginfo.h is
obsolete and most hosts now have it in signal.h.
(AC_CHECK_MEMBERS): New check for sigaction.sa_sigaction.
(AC_CACHE_CHECK): Cache decision to use stackovf.
(AC_EGREP_HEADER): Switch to AC_CHECK_TYPES.
* src/stackovf.c (DEBUG_STACKOVF): Remove unused define.
(SA_RESETHAND, SA_SIGINFO): Provide fallback definitions, to
simplify later code.
(PARAM_STACKOVF, PARAM_NOSTACKOVF): Move further away from NULL,
in case of dereferencing a member of a NULL pointer.
(sigsegv_handler) [HAVE_STRUCT_SIGACTION_SA_SIGACTION]: Define a
POSIX handler.
(setup_stackovf_trap): Use NULL instead of 0 for pointers, use
EXIT_FAILURE in error, indent preprocessor directives.
[HAVE_SIGALTSTACK && HAVE_SIGINFO_T]: Depend on siginfo_t, not
siginfo.h.
[HAVE_SIGACTION && defined SA_ONSTACK]: Prefer POSIX handler.
Reported by Santiago Vila.
CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/m4/ChangeLog?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.76&r2=1.1.1.1.2.77
http://cvs.savannah.gnu.org/viewcvs/m4/configure.ac?cvsroot=m4&only_with_tag=branch-1_4&r1=1.36.2.14&r2=1.36.2.15
http://cvs.savannah.gnu.org/viewcvs/m4/src/m4.c?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.10&r2=1.1.1.1.2.11
http://cvs.savannah.gnu.org/viewcvs/m4/src/stackovf.c?cvsroot=m4&only_with_tag=branch-1_4&r1=1.1.1.1.2.1&r2=1.1.1.1.2.2
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