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39 lines
1.4 KiB
39 lines
1.4 KiB
This patch fixes a flex-2.6.4 build failure on x86_64 and possibly other |
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architectures where `size_t' is larger than `int'. The failure occurs as |
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follows: |
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A missing `reallocarray' prototype during compilation means that the |
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compiler assumes an `int' return type. When compiling with `-pie' (standard |
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for Fedora), addresses on the heap can be larger than `int' can store. Thus, |
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pointers returned from `reallocarray' are truncated and any read/write to |
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them leads to a SIGSEGV. |
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From 24fd0551333e7eded87b64dd36062da3df2f6380 Mon Sep 17 00:00:00 2001 |
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From: Explorer09 <explorer09@gmail.com> |
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Date: Mon, 4 Sep 2017 10:47:33 +0800 |
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Subject: [PATCH] build: AC_USE_SYSTEM_EXTENSIONS in configure.ac. |
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This would, e.g. define _GNU_SOURCE in config.h, enabling the |
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reallocarray() prototype in glibc 2.26+ on Linux systems with that |
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version of glibc. |
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Fixes #241. |
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--- |
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configure.ac | 2 ++ |
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1 file changed, 2 insertions(+) |
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Index: b/configure.ac |
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=================================================================== |
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--- a/configure.ac |
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+++ b/configure.ac |
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@@ -25,8 +25,10 @@ |
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# autoconf requirements and initialization |
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AC_INIT([the fast lexical analyser generator],[2.6.4],[flex-help@lists.sourceforge.net],[flex]) |
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+AC_PREREQ([2.60]) |
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AC_CONFIG_SRCDIR([src/scan.l]) |
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AC_CONFIG_AUX_DIR([build-aux]) |
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+AC_USE_SYSTEM_EXTENSIONS |
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LT_INIT |
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AM_INIT_AUTOMAKE([1.11.3 -Wno-portability foreign check-news std-options dist-lzip parallel-tests subdir-objects]) |
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AC_CONFIG_HEADER([src/config.h])
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