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