From: cyan4973 <yann.collet.73@gmail.com>
Date: Sun, 5 Feb 2017 07:36:12 +0000 (-0800)
Subject: Silence zlib detection routine
X-Git-Tag: v1.1.3^2~1^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=613087c02bd6bf1a95c71790844bf9d770e54e0e;p=thirdparty%2Fzstd.git

Silence zlib detection routine

When it fails, $(CC) sends error message into stderr
redirected to /dev/null
---

diff --git a/programs/Makefile b/programs/Makefile
index 9746ec4ed..599bef694 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -67,7 +67,7 @@ endif
 
 # zlib detection
 VOID = /dev/null
-HAVE_ZLIB := $(shell echo "int main(){}" | $(CC) -o $(VOID) -x c - -lz && echo 1 || echo 0)
+HAVE_ZLIB := $(shell echo "int main(){}" | $(CC) -o $(VOID) -x c - -lz 2> $(VOID) && echo 1 || echo 0)
 ifeq ($(HAVE_ZLIB), 1)
 ZLIBCPP = -DZSTD_GZDECOMPRESS
 ZLIBLD = -lz