# =========================================================================== # www.gnu.org/software/autoconf-archive/ax_append_flag.html # =========================================================================== # # SYNOPSIS # # AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE]) # # DESCRIPTION # # FLAG is appended to the FLAGS-VARIABLE shell variable, with a space # added in between. # # If FLAGS-VARIABLE is not specified, the current language’s flags (e.g. # CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains # FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly # FLAG. # # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. # # LICENSE # # Copyright © 2008 Guido U. Draheim <guidod@gmx.de> # Copyright © 2011 Maarten Bosmans <mkbosmans@gmail.com> # # Copying and distribution of this file, with or without modification, are # permitted in any medium without royalty provided the copyright notice # and this notice are preserved. This file is offered as-is, without any # warranty.

serial 8

AC_DEFUN(, [dnl AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF AS_VAR_PUSHDEF(, [m4_default($2,_AC_LANG_PREFIX)]) AS_VAR_SET_IF(FLAGS,[

AS_CASE([" AS_VAR_GET(FLAGS) "],
  [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
  [
   AS_VAR_APPEND(FLAGS,[" $1"])
   AC_RUN_LOG([: FLAGS="$FLAGS"])
  ])
],
[
AS_VAR_SET(FLAGS,[$1])
AC_RUN_LOG([: FLAGS="$FLAGS"])
])

AS_VAR_POPDEF()dnl ])dnl AX_APPEND_FLAG