avisynthplus, cleanup (#8244)

media-libs/avisynthplus/avisynthplus-3.7.1.recipe

@@ -6,7 +6,7 @@ HOMEPAGE="https://avs-plus.net"
 COPYRIGHT="2000-2015 Ben Rudiak-Gould, et al.
 	2013-2021 AviSynth+ Project"
 LICENSE="GNU GPL v2"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://github.com/AviSynth/AviSynthPlus/archive/v$portVersion.tar.gz"
 CHECKSUM_SHA256="96c5043512ecf8dca7a6257b8a54a28dcb8fea454d0dc5a9fd6f61cceda6bbef"
 SOURCE_FILENAME="avisynthplus-$portVersion.tar.gz"
@@ -47,16 +47,17 @@ BUILD_PREREQUIRES="
 
 BUILD()
 {
-	mkdir -p avisynth-build
-	cd avisynth-build
-	cmake ../ $cmakeDirArgs -DCMAKE_CXX_FLAGS="-DRELEASE_TARBALL" -DCMAKE_BUILD_TYPE=Release
-	make $jobArgs
+	cmake -Bbuild -S. -DCMAKE_BUILD_TYPE=Release \
+		$cmakeDirArgs \
+		-DCMAKE_CXX_FLAGS="-DRELEASE_TARBALL"
+	make -C build $jobArgs
 }
 
 INSTALL()
 {
-	make -C avisynth-build install
+	make -C build install
 
+	prepareInstalledDevelLib libavisynth
 	fixPkgconfig
 
 	packageEntries devel \