projects / userspace-rcu.git / blame
| Commit | Line | Data |
|---|---|---|
| ee334e48 MJ |
1 | # =========================================================================== |
| 2 | # https://www.gnu.org/software/autoconf-archive/ax_append_flag.html | |
| 3 | # =========================================================================== | |
| 4 | # | |
| 5 | # SYNOPSIS | |
| 6 | # | |
| 7 | # AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE]) | |
| 8 | # | |
| 9 | # DESCRIPTION | |
| 10 | # | |
| 11 | # FLAG is appended to the FLAGS-VARIABLE shell variable, with a space | |
| 12 | # added in between. | |
| 13 | # | |
| 14 | # If FLAGS-VARIABLE is not specified, the current language's flags (e.g. | |
| 15 | # CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains | |
| 16 | # FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly | |
| 17 | # FLAG. | |
| 18 | # | |
| 19 | # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. | |
| 20 | # | |
| 21 | # LICENSE | |
| 22 | # | |
| 23 | # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> | |
| 24 | # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> | |
| 25 | # | |
| 26 | # Copying and distribution of this file, with or without modification, are | |
| 27 | # permitted in any medium without royalty provided the copyright notice | |
| 28 | # and this notice are preserved. This file is offered as-is, without any | |
| 29 | # warranty. | |
| 30 | ||
| 31 | #serial 8 | |
| 32 | ||
| 33 | AC_DEFUN([AX_APPEND_FLAG], | |
| 34 | [dnl | |
| 35 | AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF | |
| 36 | AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])]) | |
| 37 | AS_VAR_SET_IF(FLAGS,[ | |
| 38 | AS_CASE([" AS_VAR_GET(FLAGS) "], | |
| 39 | [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])], | |
| 40 | [ | |
| 41 | AS_VAR_APPEND(FLAGS,[" $1"]) | |
| 42 | AC_RUN_LOG([: FLAGS="$FLAGS"]) | |
| 43 | ]) | |
| 44 | ], | |
| 45 | [ | |
| 46 | AS_VAR_SET(FLAGS,[$1]) | |
| 47 | AC_RUN_LOG([: FLAGS="$FLAGS"]) | |
| 48 | ]) | |
| 49 | AS_VAR_POPDEF([FLAGS])dnl | |
| 50 | ])dnl AX_APPEND_FLAG |