Update CAF to newer version and make it use libstdc++ explicitly

caf/Makefile

@@ -2,7 +2,7 @@ SHELL:=/bin/bash
 
 caf:
 	git clone https://github.com/actor-framework/actor-framework
-	pushd actor-framework && git checkout 0.17.3
+	pushd actor-framework && git checkout 6bbe993f315eaa7c8264bc9ae240766b05e64513 # master at the time of writing
 	bash ../ubuntu1804.sh make impl
 	make package
 
@@ -13,22 +13,22 @@ impl:
 	update-alternatives --install /usr/bin/clang clang /usr/bin/clang-10 40
 	update-alternatives --install /usr/bin/ld ld /usr/bin/ld.lld-10 40
 	pushd actor-framework && \
-	./configure --prefix=$$PWD/caf_out --with-clang=$$(which c++) --build-static-only \
-		--no-examples \
-		--no-unit-tests \
-		--no-tools \
-		--no-python && \
-	pushd build && \
+	CXX="$(which c++)" ./configure --cxx-flags="-stdlib=libstdc++" --disable-shared-libs --prefix=$$PWD/caf_out && \
+	echo patch CMakeLists.txt ../caf-cmakefile.patch && \
 	mkdir -p build && \
-	cmake  \
-		-DCMAKE_INSTALL_PREFIX=$$PWD/caf_out \
-		-DCAF_BUILD_STATIC=yes \
-		-DCAF_BUILD_STATIC_ONLY=yes \
-		-DCAF_NO_EXAMPLES=yes \
-		-DCAF_NO_UNIT_TESTS=yes \
-		.. && \
-	make -j $$(nproc) && \
+	pushd build && \
+	cmake  -DCMAKE_INSTALL_PREFIX=$$PWD/caf_out .. && \
+	DO_NOT_SPECIFY_CMAKE_CXX_FLAGS_HERE="" make -j $$(nproc) && \
 	make install
+
+    # works: CXX="$(which c++)" ./configure --cxx-flags="-stdlib=libc++" --disable-shared-libs --prefix=$$PWD/caf_out && \
+	# changed to libstdc++ (the gnu version)
+    # until my question is answered here: https://groups.google.com/forum/#!topic/v8-users/Do5MvAvYFgs
+    # i will not use libc++
+	#
+
+	# was: CMAKE_CXX_FLAGS="-std=c++17 -stdlib=libc++" make -j $$(nproc) && \
+	# CMAKE_CXX_FLAGS="-std=c++17 -stdlib=libc++ -DGLIBCXX_USE_CXX11_ABI=1 -D_GLIBCXX_USE_CXX11_ABI=1" make -j $$(nproc) && \
 		#-DCAF_NO_AUTO_LIBCPP=yes \
 	#GLIBCXX_USE_CXX11_ABI=1 CMAKE_CXX_FLAGS="-std=c++17 -stdlib=libc++" make -j $$(nproc) && \
 	#make install