1 1.1 mrg # ============================================================================== 2 1.1 mrg # https://www.gnu.org/software/autoconf-archive/ax_gcc_warn_unused_result.html 3 1.1 mrg # ============================================================================== 4 1.1 mrg # 5 1.1 mrg # SYNOPSIS 6 1.1 mrg # 7 1.1 mrg # AX_GCC_WARN_UNUSED_RESULT 8 1.1 mrg # 9 1.1 mrg # DESCRIPTION 10 1.1 mrg # 11 1.1 mrg # The macro will compile a test program to see whether the compiler does 12 1.1 mrg # understand the per-function postfix pragma. 13 1.1 mrg # 14 1.1 mrg # LICENSE 15 1.1 mrg # 16 1.1 mrg # Copyright (c) 2008 Guido U. Draheim <guidod (a] gmx.de> 17 1.1 mrg # 18 1.1 mrg # Copying and distribution of this file, with or without modification, are 19 1.1 mrg # permitted in any medium without royalty provided the copyright notice 20 1.1 mrg # and this notice are preserved. This file is offered as-is, without any 21 1.1 mrg # warranty. 22 1.1 mrg 23 1.1 mrg #serial 10 24 1.1 mrg 25 1.1 mrg AC_DEFUN([AX_GCC_WARN_UNUSED_RESULT],[dnl 26 1.1 mrg AC_CACHE_CHECK( 27 1.1 mrg [whether the compiler supports function __attribute__((__warn_unused_result__))], 28 1.1 mrg ax_cv_gcc_warn_unused_result,[ 29 1.1 mrg AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[__attribute__((__warn_unused_result__)) 30 1.1 mrg int f(int i) { return i; }]], 31 1.1 mrg [])], 32 1.1 mrg [ax_cv_gcc_warn_unused_result=yes], [ax_cv_gcc_warn_unused_result=no])]) 33 1.1 mrg if test "$ax_cv_gcc_warn_unused_result" = yes; then 34 1.1 mrg AC_DEFINE([GCC_WARN_UNUSED_RESULT],[__attribute__((__warn_unused_result__))], 35 1.1 mrg [most gcc compilers know a function __attribute__((__warn_unused_result__))]) 36 1.1 mrg fi 37 1.1 mrg ]) 38
Indexes created Mon Oct 26 00:26:21 UTC 2026