llvm12: fix packaging

- The use of wildcards in prepareInstalledDevelLibs results in some
  libraries going missing. In this case, the rather important libclang
  was missing, preventing youCompleteMe from finding it.
- Disable static ibrary build of libunwind since there is a shared one.

sys-devel/llvm/llvm12-12.0.1.recipe

@@ -31,7 +31,7 @@ other than the ones listed above.
 HOMEPAGE="https://www.llvm.org/"
 COPYRIGHT="2003-2019 University of Illinois at Urbana-Champaign"
 LICENSE="Apache v2 with LLVM Exception"
-REVISION="3"
+REVISION="4"
 SOURCE_URI="https://github.com/llvm/llvm-project/releases/download/llvmorg-$portVersion/llvm-$portVersion.src.tar.xz"
 CHECKSUM_SHA256="7d9a8405f557cefc5a21bf5672af73903b64749d9bc3a50322239f56f34ffddf"
 SOURCE_DIR="llvm-$portVersion.src"
@@ -616,7 +616,7 @@ BUILD()
 	# such as Mesa
 	cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$prefix \
 		-DCMAKE_SKIP_RPATH=YES $cmakeFlags \
-		-DLLVM_ENABLE_RTTI=ON -DLLVM_LINK_LLVM_DYLIB=YES \
+		-DLLVM_ENABLE_RTTI=ON -DLLVM_LINK_LLVM_DYLIB=YES -DLIBUNWIND_ENABLE_STATIC=OFF \
 		-DLLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR=$sourceDir/../clang-tools-extra \
 		-G Ninja \
 		..
@@ -648,18 +648,100 @@ INSTALL()
 		binDir=$prefix/bin
 	fi
 
-	# You can try and be fancy here parsing each arch in a for loop... but
-	# not all arches contain the same libraries. The inventory for each arch
-	# also changes between releases... so lets KISS.
+	echo "before prepare"
+	ls -l $libDir/libclang*
+
+	# FIXME use of wildcards in arguments to prepareInstalledDevelLibs does not work, the libraries
+	# end up missing from $libDir.
 	prepareInstalledDevelLibs \
+		libclang \
+		libclangAPINotes \
+		libclangARCMigrate \
+		libclangAST \
+		libclangASTMatchers \
+		libclangAnalysis \
+		libclangApplyReplacements \
+		libclangBasic \
+		libclangChangeNamespace \
+		libclangCodeGen \
+		libclangCrossTU \
+		libclangDaemon \
+		libclangDaemonTweaks \
+		libclangDependencyScanning \
+		libclangDirectoryWatcher \
+		libclangDoc \
+		libclangDriver \
+		libclangDynamicASTMatchers \
+		libclangEdit \
+		libclangFormat \
+		libclangFrontend \
+		libclangFrontendTool \
+		libclangHandleCXX \
+		libclangHandleLLVM \
+		libclangIncludeFixer \
+		libclangIncludeFixerPlugin \
+		libclangIndex \
+		libclangIndexSerialization \
+		libclangLex \
+		libclangMove \
+		libclangParse \
+		libclangQuery \
+		libclangReorderFields \
+		libclangRewrite \
+		libclangRewriteFrontend \
+		libclangSema \
+		libclangSerialization \
+		libclangStaticAnalyzerCheckers \
+		libclangStaticAnalyzerCore \
+		libclangStaticAnalyzerFrontend \
+		libclangTesting \
+		libclangTidy \
+		libclangTidyAbseilModule \
+		libclangTidyAlteraModule \
+		libclangTidyAndroidModule \
+		libclangTidyBoostModule \
+		libclangTidyBugproneModule \
+		libclangTidyCERTModule \
+		libclangTidyConcurrencyModule \
+		libclangTidyCppCoreGuidelinesModule \
+		libclangTidyDarwinModule \
+		libclangTidyFuchsiaModule \
+		libclangTidyGoogleModule \
+		libclangTidyHICPPModule \
+		libclangTidyLLVMLibcModule \
+		libclangTidyLLVMModule \
+		libclangTidyLinuxKernelModule \
+		libclangTidyMPIModule \
+		libclangTidyMain \
+		libclangTidyMiscModule \
+		libclangTidyModernizeModule \
+		libclangTidyObjCModule \
+		libclangTidyOpenMPModule \
+		libclangTidyPerformanceModule \
+		libclangTidyPlugin \
+		libclangTidyPortabilityModule \
+		libclangTidyReadabilityModule \
+		libclangTidyUtils \
+		libclangTidyZirconModule \
+		libclangTooling \
+		libclangToolingASTDiff \
+		libclangToolingCore \
+		libclangToolingInclusions \
+		libclangToolingRefactoring \
+		libclangToolingSyntax \
+		libclangTransformer \
+		libclangdRemoteIndex \
+		libclangdSupport \
 		libfindAllSymbols \
 		libLLVM* \
 		libLTO	\
-		libclang* \
 		liblld* \
 		libRemarks \
 		libunwind
 
+	echo "after prepare"
+	ls -l $libDir/libclang*
+
 	# adjust cmake library paths because prepareInstalledDevelLibs moved them
 	sed -i 's,\${_IMPORT_PREFIX}/lib/,\${_IMPORT_PREFIX}/develop/lib/,' \
 		$libDir/cmake/clang/ClangTargets-release.cmake \