This patch is to have clang++ (>= 3.2) happily build OwlPS Positioner.
For some reason it doesn't work on NetBSD, but it is fine on GNU/Linux
and (a couple of warnings apart) on DragonFly BSD.
We chose a centralised approach, since threads are needed in several
modules: the find_package() is done only once in the rood directory.
Not sure it's the best approach though, but this test is several lines
long so doing that avoids duplication of this code.
- Default compiler and linker flags were added silently. They are now
set in the cache if no previous values are present.
- Debug flags and regular flags have been merged.
- Position-independent code (doesn't appear in the cache because CMake
lacks variables like CMAKE_EXE_COMPILE_FLAGS):
- Shared libraries are compiled with -fPIC.
- Executables and static libraries are compiled with -fPIE.
- Executables are linked with -pie -fPIE.
Matteo Cypriani
Matteo Cypriani