From: Nick Terrell <terrelln@fb.com>
Date: Thu, 9 Feb 2017 22:20:52 +0000 (-0800)
Subject: Improvement from @inikep
X-Git-Tag: v1.1.4~1^2~73^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F537%2Fhead;p=thirdparty%2Fzstd.git

Improvement from @inikep
---

diff --git a/programs/platform.h b/programs/platform.h
index b54b94d75..def8945bd 100644
--- a/programs/platform.h
+++ b/programs/platform.h
@@ -77,10 +77,9 @@ extern "C" {
 #    define PLATFORM_POSIX_VERSION 200112L
 #  else
 #    if defined(__linux__) || defined(__linux)
-#      ifdef _POSIX_C_SOURCE
-#        undef _POSIX_C_SOURCE
+#      ifndef _POSIX_C_SOURCE
+#        define _POSIX_C_SOURCE 200112L  /* use feature test macro */
 #      endif
-#      define _POSIX_C_SOURCE 200112L  /* use feature test macro */
 #    endif
 #    include <unistd.h>  /* declares _POSIX_VERSION */
 #    if defined(_POSIX_VERSION)  /* POSIX compliant */