ax_append_link_flags.m4 (1711B)
1 # =========================================================================== 2 # https://www.gnu.org/software/autoconf-archive/ax_append_link_flags.html 3 # =========================================================================== 4 # 5 # SYNOPSIS 6 # 7 # AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT]) 8 # 9 # DESCRIPTION 10 # 11 # For every FLAG1, FLAG2 it is checked whether the linker works with the 12 # flag. If it does, the flag is added FLAGS-VARIABLE 13 # 14 # If FLAGS-VARIABLE is not specified, the linker's flags (LDFLAGS) is 15 # used. During the check the flag is always added to the linker's flags. 16 # 17 # If EXTRA-FLAGS is defined, it is added to the linker's default flags 18 # when the check is done. The check is thus made with the flags: "LDFLAGS 19 # EXTRA-FLAGS FLAG". This can for example be used to force the linker to 20 # issue an error when a bad flag is given. 21 # 22 # INPUT gives an alternative input source to AC_COMPILE_IFELSE. 23 # 24 # NOTE: This macro depends on the AX_APPEND_FLAG and AX_CHECK_LINK_FLAG. 25 # Please keep this macro in sync with AX_APPEND_COMPILE_FLAGS. 26 # 27 # LICENSE 28 # 29 # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> 30 # 31 # Copying and distribution of this file, with or without modification, are 32 # permitted in any medium without royalty provided the copyright notice 33 # and this notice are preserved. This file is offered as-is, without any 34 # warranty. 35 36 #serial 7 37 38 AC_DEFUN([AX_APPEND_LINK_FLAGS], 39 [AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG]) 40 AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) 41 for flag in $1; do 42 AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3], [$4]) 43 done 44 ])dnl AX_APPEND_LINK_FLAGS