2012-09-19 23:38:41 -07:00
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# ===========================================================================
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2018-04-14 23:31:01 -10:00
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# https://www.gnu.org/software/autoconf-archive/ax_append_link_flags.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT])
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#
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# DESCRIPTION
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#
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# For every FLAG1, FLAG2 it is checked whether the linker works with the
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# flag. If it does, the flag is added FLAGS-VARIABLE
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#
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# If FLAGS-VARIABLE is not specified, the linker's flags (LDFLAGS) is
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# used. During the check the flag is always added to the linker's flags.
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#
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# If EXTRA-FLAGS is defined, it is added to the linker's default flags
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# when the check is done. The check is thus made with the flags: "LDFLAGS
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# EXTRA-FLAGS FLAG". This can for example be used to force the linker to
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# issue an error when a bad flag is given.
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#
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# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
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#
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# NOTE: This macro depends on the AX_APPEND_FLAG and AX_CHECK_LINK_FLAG.
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# Please keep this macro in sync with AX_APPEND_COMPILE_FLAGS.
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#
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# LICENSE
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#
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# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Archive. When you make and distribute a
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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2018-04-14 23:31:01 -10:00
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#serial 6
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AC_DEFUN([AX_APPEND_LINK_FLAGS],
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[AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
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AX_REQUIRE_DEFINED([AX_APPEND_FLAG])
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for flag in $1; do
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AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3], [$4])
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done
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])dnl AX_APPEND_LINK_FLAGS
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