[7d160bb] | 1 | # =========================================================================== |
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[96fc67] | 2 | # https://www.gnu.org/software/autoconf-archive/ax_append_flag.html |
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[7d160bb] | 3 | # =========================================================================== |
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| 4 | # |
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| 5 | # SYNOPSIS |
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| 6 | # |
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| 7 | # AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE]) |
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| 8 | # |
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| 9 | # DESCRIPTION |
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| 10 | # |
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| 11 | # FLAG is appended to the FLAGS-VARIABLE shell variable, with a space |
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| 12 | # added in between. |
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| 13 | # |
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| 14 | # If FLAGS-VARIABLE is not specified, the current language's flags (e.g. |
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| 15 | # CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains |
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| 16 | # FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly |
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| 17 | # FLAG. |
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| 18 | # |
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| 19 | # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. |
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| 20 | # |
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| 21 | # LICENSE |
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| 22 | # |
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| 23 | # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> |
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| 24 | # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> |
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| 25 | # |
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[96fc67] | 26 | # Copying and distribution of this file, with or without modification, are |
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| 27 | # permitted in any medium without royalty provided the copyright notice |
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| 28 | # and this notice are preserved. This file is offered as-is, without any |
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| 29 | # warranty. |
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[7d160bb] | 30 | |
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[96fc67] | 31 | #serial 8 |
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[7d160bb] | 32 | |
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| 33 | AC_DEFUN([AX_APPEND_FLAG], |
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[96fc67] | 34 | [dnl |
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| 35 | AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF |
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| 36 | AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])]) |
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| 37 | AS_VAR_SET_IF(FLAGS,[ |
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| 38 | AS_CASE([" AS_VAR_GET(FLAGS) "], |
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| 39 | [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])], |
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| 40 | [ |
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| 41 | AS_VAR_APPEND(FLAGS,[" $1"]) |
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| 42 | AC_RUN_LOG([: FLAGS="$FLAGS"]) |
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| 43 | ]) |
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| 44 | ], |
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| 45 | [ |
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| 46 | AS_VAR_SET(FLAGS,[$1]) |
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| 47 | AC_RUN_LOG([: FLAGS="$FLAGS"]) |
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| 48 | ]) |
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[7d160bb] | 49 | AS_VAR_POPDEF([FLAGS])dnl |
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| 50 | ])dnl AX_APPEND_FLAG |
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[96fc67] | 51 | |
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