ax_append_compile_flags.m4 (1765B)
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