libgit2: fix gcc2 build.

This is needed for the work on the Git Tracker add-on for GSoC.

dev-libs/libgit2/libgit2-0.26.3.recipe

@@ -15,12 +15,13 @@ DESCRIPTION="The library provides:
 HOMEPAGE="https://libgit2.github.com/"
 COPYRIGHT="2005-2018 libgit2 project"
 LICENSE="GNU LGPL v2"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://github.com/libgit2/libgit2/archive/v$portVersion.tar.gz"
 CHECKSUM_SHA256="0da4e211dfb63c22e5f43f2a4a5373e86a140afa88a25ca6ba3cc2cae58263d2"
 SOURCE_FILENAME="libgit2-$portVersion.tar.gz"
+PATCHES="libgit2-$portVersion.patchset"
 
-ARCHITECTURES="!x86_gcc2 ?x86 x86_64"
+ARCHITECTURES="x86_gcc2 ?x86 x86_64"
 SECONDARY_ARCHITECTURES="x86"
 
 libVersion="$portVersion"
@@ -69,13 +70,18 @@ BUILD()
 {
 	mkdir -p build && cd build
 
+	OPTIONS=
+	if [ $effectiveTargetArchitecture == x86_gcc2 ] ; then
+		OPTIONS=-DTHREADSAFE=OFF
+	fi
+
 	cmake .. \
 		-DCMAKE_INSTALL_PREFIX:PATH=$prefix \
 		-DBIN_INSTALL_DIR:PATH=$binDir \
 		-DINCLUDE_INSTALL_DIR:PATH=$includeDir \
 		-DLIB_INSTALL_DIR:PATH=$libDir \
 		-DBUILD_CLAR=OFF \
-		-DBUILD_EXAMPLES=OFF
+		-DBUILD_EXAMPLES=OFF $OPTIONS
 
 	make $jobArgs
 }