From: Antonio Ospite <ao2@ao2.it>
Date: Thu, 22 Oct 2015 09:33:30 +0000 (+0200)
Subject: Makefile: fix warnings when linking with clang++
X-Git-Url: https://git.ao2.it/experiments/opencv_trail_effect.git/commitdiff_plain/4eac1abc8f592c16e93a54f5b1d04c371d35f8da?ds=sidebyside

Makefile: fix warnings when linking with clang++

Clang ignores some options during linkage and warns about it:

  clang: warning: argument unused during compilation: '-ansi'
  clang: warning: argument unused during compilation: '-Wp,-D_FORTIFY_SOURCE=2'

Add -Qunused-arguments to LDFLAGS to suppress the warnings.
---

diff --git a/Makefile b/Makefile
index 66355e0..6bb3c15 100644
--- a/Makefile
+++ b/Makefile
@@ -28,6 +28,10 @@ ifneq ($(CXX),clang++)
 	      -Wunused-but-set-variable
 endif
 
+ifeq ($(CXX),clang++)
+  LDFLAGS += -Qunused-arguments
+endif
+
 CXXFLAGS += $(shell pkg-config --cflags opencv)
 LDLIBS += $(shell pkg-config --libs opencv)