Re: [gdb commit] [RFC patch] non-release srctrees: --enable-targets=all & 64bit & -lmcheck

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Fri, Jun 1, 2012 at 11:21 AM, Jan Kratochvil
<jan.kratochvil@redhat.com> wrote:
> On Fri, 01 Jun 2012 18:11:43 +0200, Tom Tromey wrote:
>> >>>>> "Jan" == Jan Kratochvil <jan.kratochvil@redhat.com> writes:
>> Jan> -lmcheck is cheap enough to never be noticed and it also finds checked in
>> Jan> regressions:
>>
>> I'm in favor of this part.  Could you separate out just the gdb part and
>> put it in?
>
> Checked in only the gdb/ part.
>
>
> Thanks,
> Jan
>
>
> http://sourceware.org/ml/gdb-cvs/2012-06/msg00005.html
>
> --- src/gdb/ChangeLog   2012/06/01 16:37:56     1.14309
> +++ src/gdb/ChangeLog   2012/06/01 18:20:16     1.14310
> @@ -1,3 +1,11 @@
> +2012-06-01  Jan Kratochvil  <jan.kratochvil@redhat.com>
> +
> +       * configure.ac (development): Define new variable.
> +       Call AC_CHECK_LIB for mcheck if $development.
> +       (ERROR_ON_WARNING): Enable it by default only if $development.
> +       * config.in: Regenerate.
> +       * configure: Regenerate.
> +
>  2012-06-01  Siddhesh Poyarekar  <siddhesh@redhat.com>
>
>         * target.c (target_read_memory): Make LEN argument as size_t.
> --- src/gdb/config.in   2012/05/11 18:20:26     1.143
> +++ src/gdb/config.in   2012/06/01 18:20:18     1.144
> --- src/gdb/configure   2012/05/20 20:35:18     1.365
> +++ src/gdb/configure   2012/06/01 18:20:18     1.366
> --- src/gdb/configure.ac        2012/05/20 20:35:19     1.176
> +++ src/gdb/configure.ac        2012/06/01 18:20:18     1.177
> @@ -18,6 +18,11 @@
>
>  dnl Process this file with autoconf to produce a configure script.
>
> +dnl Provide more thorough testing by -lmcheck.
> +dnl Set it to 'true' for development snapshots, 'false' for releases or
> +dnl pre-releases.
> +development=true
> +
>  AC_PREREQ(2.59)dnl
>  AC_INIT(main.c)
>  AC_CONFIG_HEADER(config.h:config.in)
> @@ -640,6 +645,11 @@
>  AC_SUBST(READLINE_CFLAGS)
>  AC_SUBST(READLINE_TEXI_INCFLAG)
>
> +dnl -lmcheck provides cheap enough memory mangling for debugging purposes.
> +if $development; then
> +  AC_CHECK_LIB(mcheck, main)
> +fi
> +
>  # Generate jit-reader.h
>
>  # This is typedeffed to GDB_CORE_ADDR in jit-reader.h
> @@ -1822,8 +1832,8 @@
>       *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
>     esac])
>
> -# Enable -Werror by default when using gcc
> -if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
> +# Enable -Werror by default when using gcc.  Turn it off for releases.
> +if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" && $development; then
>      ERROR_ON_WARNING=yes
>  fi
>

This caused:

http://sourceware.org/bugzilla/show_bug.cgi?id=14377

-- 
H.J.