| From c21adbb0b230ffba97cf5d059e2bd024e13a37df Mon Sep 17 00:00:00 2001 |
| From: Khem Raj <raj.khem@gmail.com> |
| Date: Sat, 22 Apr 2017 11:54:57 -0700 |
| Subject: [PATCH] configure: Check for -Wno-error=format-truncation compiler |
| option |
| |
| If this option is supported by compiler then disable it ( gcc7+) |
| Fixes |
| client.c:834:23: error: '%s' directive output may be truncated writing up to 1023 bytes into a region of size 1010 [-Werror=format-truncation=] |
| |
| Signed-off-by: Khem Raj <raj.khem@gmail.com> |
| |
| --- |
| acinclude/ax_check_compile_flag.m4 | 74 ++++++++++++++++++++++++++++++++++++++ |
| configure.ac | 2 ++ |
| 2 files changed, 76 insertions(+) |
| create mode 100644 acinclude/ax_check_compile_flag.m4 |
| |
| diff --git a/acinclude/ax_check_compile_flag.m4 b/acinclude/ax_check_compile_flag.m4 |
| new file mode 100644 |
| index 0000000..dcabb92 |
| --- /dev/null |
| +++ b/acinclude/ax_check_compile_flag.m4 |
| @@ -0,0 +1,74 @@ |
| +# =========================================================================== |
| +# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html |
| +# =========================================================================== |
| +# |
| +# SYNOPSIS |
| +# |
| +# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) |
| +# |
| +# DESCRIPTION |
| +# |
| +# Check whether the given FLAG works with the current language's compiler |
| +# or gives an error. (Warnings, however, are ignored) |
| +# |
| +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on |
| +# success/failure. |
| +# |
| +# 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: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this |
| +# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. |
| +# |
| +# LICENSE |
| +# |
| +# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> |
| +# 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 5 |
| + |
| +AC_DEFUN([AX_CHECK_COMPILE_FLAG], |
| +[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF |
| +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl |
| +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ |
| + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS |
| + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" |
| + AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], |
| + [AS_VAR_SET(CACHEVAR,[yes])], |
| + [AS_VAR_SET(CACHEVAR,[no])]) |
| + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) |
| +AS_VAR_IF(CACHEVAR,yes, |
| + [m4_default([$2], :)], |
| + [m4_default([$3], :)]) |
| +AS_VAR_POPDEF([CACHEVAR])dnl |
| +])dnl AX_CHECK_COMPILE_FLAGS |
| diff --git a/configure.ac b/configure.ac |
| index ff4688c..9382fdf 100644 |
| --- a/configure.ac |
| +++ b/configure.ac |
| @@ -26,6 +26,7 @@ m4_include([acinclude/pkg.m4]) |
| m4_include([acinclude/lib-checks.m4]) |
| m4_include([acinclude/ax_cxx_compile_stdcxx_11.m4]) |
| m4_include([acinclude/ax_cxx_0x_types.m4]) |
| +m4_include([acinclude/ax_check_compile_flag.m4]) |
| |
| HOSTCXX="$BUILD_CXX" |
| PRESET_CFLAGS="$CFLAGS" |
| @@ -44,6 +45,7 @@ AC_PROG_CXX |
| AC_LANG([C++]) |
| AC_CANONICAL_HOST |
| |
| +AX_CHECK_COMPILE_FLAG([-Werror=format-truncation],[CFLAGS="$CFLAGS -Wno-error=format-truncation" CXXFLAGS="$CXXFLAGS -Wno-error=format-truncation"]) |
| # Clang 3.2 on some CPUs requires -march-native to detect correctly. |
| # GCC 4.3+ can also produce faster executables when its used. |
| # But building inside a virtual machine environment has been found to |