| 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 |