ref: ed072224bf5ca317f6e23d6d9e8376a07d70b228
dir: /m4/ax_append_compile_flags.m4/
# ============================================================================ # https://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html # ============================================================================ # # SYNOPSIS # # AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT]) # # DESCRIPTION # # For every FLAG1, FLAG2 it is checked whether the compiler works with the # flag. If it does, the flag is added FLAGS-VARIABLE # # If FLAGS-VARIABLE is not specified, the current language's flags (e.g. # CFLAGS) is used. During the check the flag is always added to the # current language's flags. # # If EXTRA-FLAGS is defined, it is added to the current language's default # flags (e.g. CFLAGS) when the check is done. The check is thus made with # the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to # force the compiler to issue an error when a bad flag is given. # # INPUT gives an alternative input source to AC_COMPILE_IFELSE. # # NOTE: This macro depends on the AX_APPEND_FLAG and # AX_CHECK_COMPILE_FLAG. Please keep this macro in sync with # AX_APPEND_LINK_FLAGS. # # LICENSE # # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> # # This program is free software: you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation, either version 3 of the License, or (at your # option) any later version. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General # Public License for more details. # # You should have received a copy of the GNU General Public License along # with this program. If not, see <https://www.gnu.org/licenses/>. # # As a special exception, the respective Autoconf Macro's copyright owner # gives unlimited permission to copy, distribute and modify the configure # scripts that are the output of Autoconf when processing the Macro. You # need not follow the terms of the GNU General Public License when using # or distributing such scripts, even though portions of the text of the # Macro appear in them. The GNU General Public License (GPL) does govern # all other use of the material that constitutes the Autoconf Macro. # # This special exception to the GPL applies to versions of the Autoconf # Macro released by the Autoconf Archive. When you make and distribute a # modified version of the Autoconf Macro, you may extend this special # exception to the GPL to apply to your modified version as well. #serial 6 AC_DEFUN([AX_APPEND_COMPILE_FLAGS], [AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG]) AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) for flag in $1; do AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3], [$4]) done ])dnl AX_APPEND_COMPILE_FLAGS