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45 lines
1.7 KiB
45 lines
1.7 KiB
11 months ago
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# ===========================================================================
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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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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 7
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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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