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404f29021a
This patch drops gdb's configury support for glibc's mcheck function. It has been observed to cause false abort()s, because it is thread-unsafe yet interposes every malloc/free operation. So if any library transitively used by gdb also uses threads, then these functions can easily corrupt their own checking data. These days, gcc ASAN and valgrind provide high quality checking, and mcheck is apparently itself being slowly deprecated. So, let's stop linking to it. Attached patch drops the autoconf/Makefile machinery for both gdb and gdbserver. No testsuite-visible impact. IMHO not worth mentioning in NEWS. See also: https://sourceware.org/bugzilla/show_bug.cgi?id=9939 gdb/ChangeLog PR build/24886 * configure.ac: Drop enable-libmcheck support. * configure, config.in: Rebuild. * libmcheck.m4: Remove. * acinclude.m4: Don't include it. * Makefile.in: Don't distribute it. * top.c (print_gdb_configuration): Don't mention it. gdb/gdbserver/ChangeLog PR build/24886 * configure.ac: Drop enable-libmcheck support. * configure, config.in: Rebuild. * acinclude.m4: Don't include it.
52 lines
1.3 KiB
Plaintext
52 lines
1.3 KiB
Plaintext
dnl gdb/gdbserver/configure.in uses BFD_HAVE_SYS_PROCFS_TYPE.
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sinclude(../../bfd/bfd.m4)
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sinclude(../acx_configure_dir.m4)
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# This gets AM_GDB_WARNINGS.
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sinclude(../warning.m4)
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dnl This gets autoconf bugfixes
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sinclude(../../config/override.m4)
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dnl For ACX_PKGVERSION and ACX_BUGURL.
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sinclude(../../config/acx.m4)
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m4_include(../../config/depstand.m4)
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m4_include(../../config/lead-dot.m4)
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dnl codeset.m4 is needed for common.m4, but not for
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dnl anything else in gdbserver.
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m4_include(../../config/codeset.m4)
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m4_include(../gdbsupport/common.m4)
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dnl For libiberty_INIT.
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m4_include(../libiberty.m4)
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dnl For GDB_AC_PTRACE.
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m4_include(../ptrace.m4)
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m4_include(../ax_cxx_compile_stdcxx.m4)
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dnl For GDB_AC_SELFTEST.
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m4_include(../selftest.m4)
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dnl Check for existence of a type $1 in libthread_db.h
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dnl Based on BFD_HAVE_SYS_PROCFS_TYPE in bfd/bfd.m4.
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AC_DEFUN([GDBSERVER_HAVE_THREAD_DB_TYPE],
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[AC_MSG_CHECKING([for $1 in thread_db.h])
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AC_CACHE_VAL(gdbserver_cv_have_thread_db_type_$1,
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[AC_TRY_COMPILE([
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#include <thread_db.h>],
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[$1 avar],
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gdbserver_cv_have_thread_db_type_$1=yes,
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gdbserver_cv_have_thread_db_type_$1=no
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)])
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if test $gdbserver_cv_have_thread_db_type_$1 = yes; then
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AC_DEFINE([HAVE_]translit($1, [a-z], [A-Z]), 1,
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[Define if <thread_db.h> has $1.])
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fi
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AC_MSG_RESULT($gdbserver_cv_have_thread_db_type_$1)
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])
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