[oe] [oe-core] qwt: fix link error when linking with ld-gold.

[Marc Reilly]

ld-gold doesn't implicitly link with librt, this fixes an unresolved
symbol error when compiling qwt examples.

Signed-off-by: Marc Reilly <marc at cpdesign.com.au>
---
 .../recipes-qt/qwt/files/fix-ld-gold-linking.patch |   14 ++++++++++++++
 meta-oe/recipes-qt/qwt/qwt.inc                     |    1 +
 2 files changed, 15 insertions(+), 0 deletions(-)
 create mode 100644 meta-oe/recipes-qt/qwt/files/fix-ld-gold-linking.patch

diff --git a/meta-oe/recipes-qt/qwt/files/fix-ld-gold-linking.patch b/meta-oe/recipes-qt/qwt/files/fix-ld-gold-linking.patch
new file mode 100644
index 0000000..a00aba4
--- /dev/null
+++ b/meta-oe/recipes-qt/qwt/files/fix-ld-gold-linking.patch
@@ -0,0 +1,14 @@
+- fix link of unresolved symbols: clock_getres and clock_gettime
+---
+diff --git a/src/src.pro b/src/src.pro
+index beb7125..ebf8ea6 100644
+--- a/src/src.pro
++++ b/src/src.pro
+@@ -94,6 +102,7 @@ SOURCES += \
+     qwt_symbol.cpp \
+     qwt_system_clock.cpp
+ 
++linux*:LIBS += -lrt
+  
+ contains(QWT_CONFIG, QwtPlot) {
+  
diff --git a/meta-oe/recipes-qt/qwt/qwt.inc b/meta-oe/recipes-qt/qwt/qwt.inc
index a299ac8..94231b4 100644
--- a/meta-oe/recipes-qt/qwt/qwt.inc
+++ b/meta-oe/recipes-qt/qwt/qwt.inc
@@ -7,6 +7,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=dac2743472b0462ff3cfb4af42051c88"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/qwt/qwt-${PV}.tar.bz2;name=qwt \
 	file://qwt6.patch \
+        file://fix-ld-gold-linking.patch \
 	"
 
 S = "${WORKDIR}/qwt-${PV}"
-- 
1.7.7