fix building on OS X when no OSX SDK is installed. (i.e. just commandline tools)
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@ -146,12 +146,17 @@ if (APPLE)
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# features can be used, not the minimum required version to run.
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set(OSX_MIN_VERSION "10.5.4")
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set(TARGET_FLAGS "${TARGET_FLAGS} -mmacosx-version-min=${OSX_MIN_VERSION}")
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set(TARGET_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk")
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if (NOT EXISTS "${TARGET_SYSROOT}/")
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set(TARGET_SYSROOT "/Developer/SDKs/MacOSX10.6.sdk")
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set(SYSROOT_LEGACY_PATH "/Developer/SDKs/MacOSX10.6.sdk")
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set(SYSROOT_PATH "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk")
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if (EXISTS "${SYSROOT_PATH}/")
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set(TARGET_SYSROOT ${SYSROOT_PATH})
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elif (EXISTS "${SYSROOT_LEGACY_PATH}/")
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set(TARGET_SYSROOT ${SYSROOT_LEGACY_PATH})
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endif()
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if (${TARGET_SYSROOT})
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set(TARGET_FLAGS "${TARGET_FLAGS} -isysroot ${TARGET_SYSROOT}")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-syslibroot,${TARGET_SYSROOT}")
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endif()
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set(TARGET_FLAGS "${TARGET_FLAGS} -isysroot ${TARGET_SYSROOT}")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-syslibroot,/Developer/SDKs/MacOSX10.6.sdk")
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# Do not warn about frameworks that are not available on all architectures.
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# This avoids a warning when linking with QuickTime.
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-no_arch_warnings")
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