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tools: flex: fix segfault with glibc 2.26+

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Fix segmentation fault caused by implicit declaration of function 'reallocarray'. Added patch will enable
reallocarray() prototype in glibc 2.26+ on Linux systems. This fix will be included in flex 2.6.5.

Fixes LEDE issue: FS#1003 (Flex does not build with GCC 7.2)

Signed-off-by: Marko Ratkaj <marko.ratkaj@sartura.hr>
This commit is contained in:
Marko Ratkaj 2017-09-19 09:35:39 +02:00 committed by Hauke Mehrtens
parent f138833d0c
commit 0fb14a2b1a
1 changed files with 27 additions and 0 deletions
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27
tools/flex/patches/200-build-AC_USE_SYSTEM_EXTENSIONS-in-configure.ac.patch Normal file
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@ -0,0 +1,27 @@
From 24fd0551333e7eded87b64dd36062da3df2f6380 Mon Sep 17 00:00:00 2001
From: Explorer09 <explorer09@gmail.com>
Date: Mon, 4 Sep 2017 10:47:33 +0800
Subject: [PATCH] build: AC_USE_SYSTEM_EXTENSIONS in configure.ac.
This would, e.g. define _GNU_SOURCE in config.h, enabling the
reallocarray() prototype in glibc 2.26+ on Linux systems with that
version of glibc.
Fixes #241.
---
configure.ac | 2 ++
1 file changed, 2 insertions(+)
--- a/configure.ac
+++ b/configure.ac
@@ -25,8 +25,10 @@
# autoconf requirements and initialization
AC_INIT([the fast lexical analyser generator],[2.6.4],[flex-help@lists.sourceforge.net],[flex])
+AC_PREREQ([2.60])
AC_CONFIG_SRCDIR([src/scan.l])
AC_CONFIG_AUX_DIR([build-aux])
+AC_USE_SYSTEM_EXTENSIONS
LT_INIT
AM_INIT_AUTOMAKE([1.11.3 -Wno-portability foreign check-news std-options dist-lzip parallel-tests subdir-objects])
AC_CONFIG_HEADER([src/config.h])