[OE-core] [Patch 1/1]:Package Boost: Reexecution of task is giving error.

[Venkata ramana gollamudi]

Failure:
"error: duplicate initialization of gcc with the following parameters" during compilation.

Steps to reproduce: 
1> bitbake -c cleansstate boost 
2> bitbake boost 
3> bitbake -c boostconfig boost -f 
4> bitbake -c compile boost -f

Defect:
	https://bugzilla.yoctoproject.org/show_bug.cgi?id=2194

Fix details:
Boost package task do_boostconfigure is appending content to 
build/tmp/work/i586-poky-linux/boost-1.49.0-r2.0/boost_1_49_0/tools/build/v2/user-config.jam file 
without checking if the content is already present in that file. 
So check is added for the same.

Please find the below patch :
--------------------------------------------------------------

diff -Nupr prev/meta/recipes-support/boost/boost.inc new/meta/recipes-support/boost/boost.inc
--- prev/meta/recipes-support/boost/boost.inc	2012-04-12 11:12:49.916786261 +0530
+++ new/meta/recipes-support/boost/boost.inc	2012-04-12 11:30:32.535786134 +0530
@@ -135,7 +135,11 @@ BJAM_OPTS    = '${BJAM_TOOLS} \
 do_boostconfig() {
 	cp -f boost/config/platform/linux.hpp boost/config/platform/linux-gnueabi.hpp
 
-	echo 'using gcc : 4.3.1 : ${CXX} : compileflags -DBOOST_SP_USE_PTHREADS -I${includedir} linkflags -L${libdir} ;' >> ${S}/tools/build/v2/user-config.jam
+	# D2194:Fixing the failure of "error: duplicate initialization of gcc with the following parameters" during compilation.
+	if ! grep -qe "^using gcc : 4.3.1" ${S}/tools/build/v2/user-config.jam 
+	then
+		echo 'using gcc : 4.3.1 : ${CXX} : compileflags -DBOOST_SP_USE_PTHREADS -I${includedir} linkflags -L${libdir} ;' >> ${S}/tools/build/v2/user-config.jam
+	fi	
 }
 
 addtask do_boostconfig after do_patch before do_configure