From: Dmitry Golovin <dima@golovin.in>
Date: Fri, 9 Jun 2017 14:10:47 +0000 (+0300)
Subject: fix clang CFLAGS checks and silence unused argument warnings
X-Git-Tag: v1.1.17~48
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9d12a6a21fd146f543e8a6b8ec4cce7fd61be606;p=musl

fix clang CFLAGS checks and silence unused argument warnings
---

diff --git a/configure b/configure
index c2db298c..539c9fcb 100755
--- a/configure
+++ b/configure
@@ -249,6 +249,7 @@ fi
 #
 tryflag   CFLAGS_TRY  -Werror=unknown-warning-option
 tryflag   CFLAGS_TRY  -Werror=unused-command-line-argument
+tryflag   CFLAGS_TRY  -Werror=ignored-optimization-argument
 tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
 tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
 
@@ -504,6 +505,13 @@ tryflag CFLAGS_AUTO -Werror=implicit-int
 tryflag CFLAGS_AUTO -Werror=pointer-sign
 tryflag CFLAGS_AUTO -Werror=pointer-arith
 
+#
+# GCC ignores unused arguements by default, but Clang needs this extra
+# parameter to stop printing warnings about LDFLAGS passed during
+# compiling stage and CFLAGS passed during linking stage.
+#
+tryflag CFLAGS_AUTO -Qunused-arguments
+
 if test "x$warnings" = xyes ; then
 tryflag CFLAGS_AUTO -Wall
 tryflag CFLAGS_AUTO -Wno-parentheses