Home/ Questions/Q 7914865
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-03T14:15:43+00:00

Does anyone know how to do specify the Mac OS X SDK to build

  • 0

Does anyone know how to do specify the Mac OS X SDK to build against with CMake? I have searched for cmake mac "base sdk" but this turned up nothing.

I am using CMake to generate Unix makefiles.

Update

On my 10.6 install, I see that /Developer/SDKs has the following:

  • MacOSX10.4u.sdk
  • MacOSX10.5.sdk
  • MacOSX10.6.sdk

Perhaps I can get CMake to pass one of these paths to the compiler somehow?

Also, my 10.7 install only has:

  • MacOSX10.6.sdk
  • MacOSX10.7.sdk

Does this mean that it can only build for these platforms?

Update 2

Damn, I just realised that actually I’m not using Xcode — so this may affect some answers. Also, I am now trying with Mac OS X 10.8 developer preview (with some weird results, see my answer).

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    After trying sakra’s valid answer (valid as far as CMake is suposed to behave) unsucessfully, I had a dig around and found that if I specify the --sysroot flag to the compiler, it seems to use the correct SDK!

    However, I now see this error when I compile against 10.7 (which I don’t see with 10.8):

    Undefined symbols for architecture i386:
  "_NXArgv", referenced from:
      execSelfNonDaemonized() in libarch.a(CArchDaemonUnix.o)
      CArchDaemonUnix::daemonize(char const*, int (*)(int, char const**)) in libarch.a(CArchDaemonUnix.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [bin/synergyc] Error 1
make[1]: *** [src/cmd/synergyc/CMakeFiles/synergyc.dir/all] Error 2
make: *** [all] Error 2

    Note: CArchDaemonUnix is a class in Synergy (an open source project I’m working on).

    Update:

    Just tried this on my 10.6 install, and I was getting a linker error when trying to compile for 10.5 — turns out you also need to specify the MACOSX_DEPLOYMENT_TARGET environment variable!

    Anyway, here’s what I’m doing when running on Mountain Lion (OSX 10.8) to compile for 10.7:

    Command line:

    MACOSX_DEPLOYMENT_TARGET=10.7

cmake -G "Unix Makefiles" -DCMAKE_OSX_SYSROOT=/Developer/SDKs/MacOSX10.7.sdk/ -DCMAKE_OSX_DEPLOYMENT_TARGET=10.7 ../..

    CMakeLists.txt:

    set(CMAKE_CXX_FLAGS "--sysroot ${CMAKE_OSX_SYSROOT} ${CMAKE_CXX_FLAGS}")

    I hope this helps someone! 🙂

    • 0