2017-01-01 14:50:51 +08:00
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dnl Copyright (C) 2012-2017 Free Software Foundation, Inc.
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On mainline/development, also link GDBserver with -lmcheck.
This factors --enable-libmcheck related bits from GDB's configure.ac
and makes GDBserver use them too. Specifically, the 'development'
global is moved to a separate script to it can be sourced by both GDB
and GDBserver, and the --enable-libmcheck/--disable-libmcheck bits
proper are moved to a new m4 file.
I started out by defining 'development' in the m4 file, but in the end
decided against it, as a separate script has the advantage that
changing it in release branches does not require regenerating
configure, unlike today.
I had also started out by making the new GDB_AC_LIBMCHECK itself
handle the yes/no default fallback depending on release/developement,
but since I had split out 'development' to a separate script, and, GDB
needs the python checks anyway (hence we'd need to do the python
checks in gdb's configure.ac, and pass in a 'default lmcheck yes/no'
parameter to GDB_AC_LIBMCHECK anyway), I ended up keeping
GDB_AC_LIBMCHECK isolated from the 'development' global. IOW, it's
the caller's business to handle it.
Tested on x86_64 Fedora 17. Built GDB and GDBserver with and without
--enable-libmcheck, and observed --enable-libmcheck overrides the
disablement of -lmcheck caused by python supporting threads, and that
GDBserver links with -lmcheck when expected. Also observed that
changing the 'development' global, and issuing "make" triggers a
relink, and '-lmcheck' is included or not from the link accordingly.
gdb/
2013-07-03 Pedro Alves <palves@redhat.com>
* Makefile.in (config.status): Depend on development.sh.
(aclocal_m4_deps): Add libmcheck.m4.
* acinclude.m4: Include libmcheck.m4.
* configure.ac: Source development.sh instead of setting
'development' here. --enable-libmcheck/--disable-libmcheck code
factored out to GDB_AC_LIBMCHECK. Run it.
* development.sh: New file.
* libmcheck.m4: New file.
* configure: Regenerate.
gdb/gdbserver/
2013-07-03 Pedro Alves <palves@redhat.com>
* Makefile.in (config.status): Depend on development.sh.
* acinclude.m4: Include libmcheck.m4.
* configure: Regenerate.
2013-07-03 21:25:46 +08:00
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dnl
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dnl This file is part of GDB.
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dnl
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dnl This program is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 3 of the License, or
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dnl (at your option) any later version.
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dnl
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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dnl GNU General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
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dnl GDB_AC_LIBMCHECK([DEFAULT])
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dnl Provide an --enable-libmcheck/--disable-libmcheck set of options
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dnl allowing a user to enable this option even when building releases,
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dnl or to disable it when building a snapshot.
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dnl DEFAULT (yes/no) is used as default if the user doesn't set
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dnl the option explicitly.
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AC_DEFUN([GDB_AC_LIBMCHECK],
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[
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AC_ARG_ENABLE(libmcheck,
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AS_HELP_STRING([--enable-libmcheck],
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[Try linking with -lmcheck if available]),
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[case "${enableval}" in
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yes | y) ENABLE_LIBMCHECK="yes" ;;
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no | n) ENABLE_LIBMCHECK="no" ;;
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*) AC_MSG_ERROR(bad value ${enableval} for --enable-libmcheck) ;;
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esac])
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if test -z "${ENABLE_LIBMCHECK}"; then
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ENABLE_LIBMCHECK=[$1]
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fi
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if test "$ENABLE_LIBMCHECK" = "yes" ; then
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AC_CHECK_LIB(mcheck, main)
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fi
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])
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