> What exactly did you do to set it as the ‘default’ gcc compiler ? > port select ?
Yep. > This setting has no bearing on what ports use to build, its only > there as a convenience for you, to define what you get as ‘gcc’ at > the command line. OK, thanks. > Also note that the gcc compilers do not use libc++ as their c++ > runtime, but gcc default libstdc++. Mixing both runtimes is a very > bad idea, so in fact using gcc is a bad choice. No ports in > MacPorts will use it to build C++ sources. OK. BTW, I see on https://libcxx.llvm.org/docs/UsingLibcxx.html#using-libc-with-gcc that gcc on MacOS actually *can* use libc++... > You should instead use one of the clang compilers as your default. I'll try. >> * Saying >> >> port install poppler >> >> returns >> >> ---> Computing dependencies for poppler >> The following dependencies will be installed: >> clang-3.7 >> clang-3.9 >> clang-4.0 >> clang-5.0 >> libomp >> llvm-3.7 >> llvm-3.9 >> llvm-4.0 >> llvm-5.0 . >> >> For me, this looks like a bad joke! *Four* compilers are necessary >> for poppler? > > No. Only one is needed for poppler. The others are likely required > for the dependencies needed first, before you can instance poppler. Indeed. Building clang-5.0 needs three previous versions! This is bad... BTW, looking at http://llvm.org/docs/GettingStarted.html#requirements I see that llvm can be built with gcc > 4.8 – for this I can definitely use my already installed gcc8, right? It's funny that the native Lion compiler can build gcc8 (since it only needs a C++98 compiler) but not the older clang-5.0... So: What is the right option to enforce gcc8 for building clang-5.0? And what about installing clang-7.0 instead of 5.0? Will `port' accept that for C++11 stuff as a default? I can also imagine to follow this route in general (at least on Lion): First, you build a recent gcc version with the native Apple compiler, then you use it to build a recent clang version. This would avoid the compilation of three intermediate clang versions that probably nobody needs later on. Werner
