'make all / make RxCpp' targets are broken #477
Description
iam@invoker:/mnt/ssd3/workspace/github/iam/rxcpp/projects/build$ make -j48
[ 22%] Linking CXX shared library libRxCpp.so
[ 23%] Building CXX object test/CMakeFiles/rxcpp_test_distinct.dir/operators/distinct.cpp.o
[ 25%] Building CXX object test/CMakeFiles/rxcpp_test_on_error_resume_next.dir/operators/on_error_resume_next.cpp.o
[ 26%] Building CXX object test/CMakeFiles/rxcpp_test_start_with.dir/operators/start_with.cpp.o
[ 26%] Building CXX object test/CMakeFiles/rxcpp_test_observer.dir/subscriptions/observer.cpp.o
[ 26%] Building CXX object test/CMakeFiles/rxcpp_test_sample.dir/operators/sample.cpp.o
[ 27%] Building CXX object test/CMakeFiles/rxcpp_test_skip_last.dir/operators/skip_last.cpp.o
[ 27%] Building CXX object test/CMakeFiles/rxcpp_test_window.dir/operators/window.cpp.o
[ 29%] Building CXX object test/CMakeFiles/rxcpp_test_buffer.dir/operators/buffer.cpp.o
[ 30%] Building CXX object test/CMakeFiles/rxcpp_test_skip_until.dir/operators/skip_until.cpp.o
/usr/bin/ld: cannot find -lstdc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)
CMakeFiles/RxCpp.dir/build.make:68: recipe for target 'libRxCpp.so' failed
make[2]: *** [libRxCpp.so] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/RxCpp.dir/all' failed
make[1]: *** [CMakeFiles/RxCpp.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
with verbose
$> VERBOSE=1 make -j32 RxCpp
/usr/bin/clang++ -fPIC -O2 -g -DNDEBUG -shared -Wl,-soname,libRxCpp.so -o libRxCpp.so
/usr/bin/ld: cannot find -lstdc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)
CMakeFiles/RxCpp.dir/build.make:68: recipe for target 'libRxCpp.so' failed
make[3]: *** [libRxCpp.so] Error 1
make[3]: Leaving directory '/mnt/ssd3/workspace/github/iam/rxcpp/projects/build'
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/RxCpp.dir/all' failed
make[2]: *** [CMakeFiles/RxCpp.dir/all] Error 2
make[2]: Leaving directory '/mnt/ssd3/workspace/github/iam/rxcpp/projects/build'
CMakeFiles/Makefile2:79: recipe for target 'CMakeFiles/RxCpp.dir/rule' failed
make[1]: *** [CMakeFiles/RxCpp.dir/rule] Error 2
make[1]: Leaving directory '/mnt/ssd3/workspace/github/iam/rxcpp/projects/build'
Makefile:164: recipe for target 'RxCpp' failed
It appears that 4de03e6 added an 'RxCpp' library target to the CMakeLists, but this doesn't properly use the compiler/linker flags specified in shared.cmake and so this build target will never build.
As a result, the default 'make' command also fails, which seems scary and undesirable.