From: Gregory Szorc <gregory.szorc@gmail.com>
Date: Sat, 26 Dec 2020 17:00:53 +0000 (-0700)
Subject: Add ifndef guards for _LARGEFILE_SOURCE and _LARGEFILE64_SOURCE
X-Git-Tag: v1.4.9^2~40^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd1a7e41ee6619a8d01373259979008db4f13a06;p=thirdparty%2Fzstd.git

Add ifndef guards for _LARGEFILE_SOURCE and _LARGEFILE64_SOURCE

This ensures the symbols aren't redefined, which would result in a compiler
error.

I was getting redefined symbols for _LARGEFILE64_SOURCE when building for
32-bit x86 Linux on an older CentOS release in a CI environment. With this
change, I'm able to compile the single file library in this environment.

Closes #2443.
---

diff --git a/lib/dictBuilder/zdict.c b/lib/dictBuilder/zdict.c
index 79c522ef3..baaa57153 100644
--- a/lib/dictBuilder/zdict.c
+++ b/lib/dictBuilder/zdict.c
@@ -23,9 +23,13 @@
 /* Unix Large Files support (>4GB) */
 #define _FILE_OFFSET_BITS 64
 #if (defined(__sun__) && (!defined(__LP64__)))   /* Sun Solaris 32-bits requires specific definitions */
+#  ifndef _LARGEFILE_SOURCE
 #  define _LARGEFILE_SOURCE
+#  endif
 #elif ! defined(__LP64__)                        /* No point defining Large file for 64 bit */
+#  ifndef _LARGEFILE64_SOURCE
 #  define _LARGEFILE64_SOURCE
+#  endif
 #endif