[Spice-devel] [PATCH libcacard] Add our own auto foo files to support AX_APPEND_LINK_FLAGS and AX_CHECK_LINK_FLAGS.

Wed Oct 14 07:50:57 PDT 2015

ack

----- Original Message -----
> Signed-off-by: Jeremy White <jwhite at codeweavers.com>
> ---
>  m4/ax_append_link_flags.m4 | 63 +++++++++++++++++++++++++++++++++++++++
>  m4/ax_check_link_flag.m4   | 74
>  ++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 137 insertions(+)
>  create mode 100644 m4/ax_append_link_flags.m4
>  create mode 100644 m4/ax_check_link_flag.m4
> 
> diff --git a/m4/ax_append_link_flags.m4 b/m4/ax_append_link_flags.m4
> new file mode 100644
> index 0000000..c73ddaf
> --- /dev/null
> +++ b/m4/ax_append_link_flags.m4
> @@ -0,0 +1,63 @@
> +#
> ===========================================================================
> +#   http://www.gnu.org/software/autoconf-archive/ax_append_link_flags.html
> +#
> ===========================================================================
> +#
> +# SYNOPSIS
> +#
> +#   AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS])
> +#
> +# DESCRIPTION
> +#
> +#   For every FLAG1, FLAG2 it is checked whether the linker works with the
> +#   flag.  If it does, the flag is added FLAGS-VARIABLE
> +#
> +#   If FLAGS-VARIABLE is not specified, the linker's flags (LDFLAGS) is
> +#   used. During the check the flag is always added to the linker's flags.
> +#
> +#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
> +#   when the check is done.  The check is thus made with the flags: "LDFLAGS
> +#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
> +#   issue an error when a bad flag is given.
> +#
> +#   NOTE: This macro depends on the AX_APPEND_FLAG and AX_CHECK_LINK_FLAG.
> +#   Please keep this macro in sync with AX_APPEND_COMPILE_FLAGS.
> +#
> +# LICENSE
> +#
> +#   Copyright (c) 2011 Maarten Bosmans <mkbosmans at gmail.com>
> +#
> +#   This program is free software: you can redistribute it and/or modify it
> +#   under the terms of the GNU General Public License as published by the
> +#   Free Software Foundation, either version 3 of the License, or (at your
> +#   option) any later version.
> +#
> +#   This program is distributed in the hope that it will be useful, but
> +#   WITHOUT ANY WARRANTY; without even the implied warranty of
> +#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
> +#   Public License for more details.
> +#
> +#   You should have received a copy of the GNU General Public License along
> +#   with this program. If not, see <http://www.gnu.org/licenses/>.
> +#
> +#   As a special exception, the respective Autoconf Macro's copyright owner
> +#   gives unlimited permission to copy, distribute and modify the configure
> +#   scripts that are the output of Autoconf when processing the Macro. You
> +#   need not follow the terms of the GNU General Public License when using
> +#   or distributing such scripts, even though portions of the text of the
> +#   Macro appear in them. The GNU General Public License (GPL) does govern
> +#   all other use of the material that constitutes the Autoconf Macro.
> +#
> +#   This special exception to the GPL applies to versions of the Autoconf
> +#   Macro released by the Autoconf Archive. When you make and distribute a
> +#   modified version of the Autoconf Macro, you may extend this special
> +#   exception to the GPL to apply to your modified version as well.
> +
> +#serial 4
> +
> +AC_DEFUN([AX_APPEND_LINK_FLAGS],
> +[AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
> +AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
> +for flag in $1; do
> +  AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2],
> [LDFLAGS])])], [], [$3])
> +done
> +])dnl AX_APPEND_LINK_FLAGS
> diff --git a/m4/ax_check_link_flag.m4 b/m4/ax_check_link_flag.m4
> new file mode 100644
> index 0000000..eb01a6c
> --- /dev/null
> +++ b/m4/ax_check_link_flag.m4
> @@ -0,0 +1,74 @@
> +#
> ===========================================================================
> +#    http://www.gnu.org/software/autoconf-archive/ax_check_link_flag.html
> +#
> ===========================================================================
> +#
> +# SYNOPSIS
> +#
> +#   AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE],
> [EXTRA-FLAGS], [INPUT])
> +#
> +# DESCRIPTION
> +#
> +#   Check whether the given FLAG works with the linker or gives an error.
> +#   (Warnings, however, are ignored)
> +#
> +#   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
> +#   success/failure.
> +#
> +#   If EXTRA-FLAGS is defined, it is added to the linker's default flags
> +#   when the check is done.  The check is thus made with the flags: "LDFLAGS
> +#   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
> +#   issue an error when a bad flag is given.
> +#
> +#   INPUT gives an alternative input source to AC_LINK_IFELSE.
> +#
> +#   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
> +#   macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
> +#
> +# LICENSE
> +#
> +#   Copyright (c) 2008 Guido U. Draheim <guidod at gmx.de>
> +#   Copyright (c) 2011 Maarten Bosmans <mkbosmans at gmail.com>
> +#
> +#   This program is free software: you can redistribute it and/or modify it
> +#   under the terms of the GNU General Public License as published by the
> +#   Free Software Foundation, either version 3 of the License, or (at your
> +#   option) any later version.
> +#
> +#   This program is distributed in the hope that it will be useful, but
> +#   WITHOUT ANY WARRANTY; without even the implied warranty of
> +#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
> +#   Public License for more details.
> +#
> +#   You should have received a copy of the GNU General Public License along
> +#   with this program. If not, see <http://www.gnu.org/licenses/>.
> +#
> +#   As a special exception, the respective Autoconf Macro's copyright owner
> +#   gives unlimited permission to copy, distribute and modify the configure
> +#   scripts that are the output of Autoconf when processing the Macro. You
> +#   need not follow the terms of the GNU General Public License when using
> +#   or distributing such scripts, even though portions of the text of the
> +#   Macro appear in them. The GNU General Public License (GPL) does govern
> +#   all other use of the material that constitutes the Autoconf Macro.
> +#
> +#   This special exception to the GPL applies to versions of the Autoconf
> +#   Macro released by the Autoconf Archive. When you make and distribute a
> +#   modified version of the Autoconf Macro, you may extend this special
> +#   exception to the GPL to apply to your modified version as well.
> +
> +#serial 4
> +
> +AC_DEFUN([AX_CHECK_LINK_FLAG],
> +[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
> +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
> +AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
> +  ax_check_save_flags=$LDFLAGS
> +  LDFLAGS="$LDFLAGS $4 $1"
> +  AC_LINK_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
> +    [AS_VAR_SET(CACHEVAR,[yes])],
> +    [AS_VAR_SET(CACHEVAR,[no])])
> +  LDFLAGS=$ax_check_save_flags])
> +AS_VAR_IF(CACHEVAR,yes,
> +  [m4_default([$2], :)],
> +  [m4_default([$3], :)])
> +AS_VAR_POPDEF([CACHEVAR])dnl
> +])dnl AX_CHECK_LINK_FLAGS
> --
> 2.1.4
> 
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