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      1 # Detect Mac OS X and SDK versions.
      2 # Output variables:
      3 #   build_mac_version
      4 #   mac_sdk_version
      5 #   mac_sdk_root
      6 #   gcc_darwin_version
      7 
      8 ifndef build_mac_version
      9 
     10 build_mac_version := $(shell sw_vers -productVersion)
     11 
     12 mac_sdk_versions_supported :=  10.6 10.7 10.8 10.9
     13 ifneq ($(strip $(MAC_SDK_VERSION)),)
     14 mac_sdk_version := $(MAC_SDK_VERSION)
     15 ifeq ($(filter $(mac_sdk_version),$(mac_sdk_versions_supported)),)
     16 $(warning ****************************************************************)
     17 $(warning * MAC_SDK_VERSION $(MAC_SDK_VERSION) isn't one of the supported $(mac_sdk_versions_supported))
     18 $(warning ****************************************************************)
     19 $(error Stop.)
     20 endif
     21 else
     22 mac_sdk_versions_installed := $(shell xcodebuild -showsdks | grep macosx | sort | sed -e "s/.*macosx//g")
     23 mac_sdk_version := $(firstword $(filter $(mac_sdk_versions_installed), $(mac_sdk_versions_supported)))
     24 ifeq ($(mac_sdk_version),)
     25 mac_sdk_version := $(firstword $(mac_sdk_versions_supported))
     26 endif
     27 endif
     28 
     29 mac_sdk_path := $(shell xcode-select -print-path)
     30 # try /Applications/Xcode*.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.?.sdk
     31 #  or /Volume/Xcode/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.?.sdk
     32 mac_sdk_root := $(mac_sdk_path)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX$(mac_sdk_version).sdk
     33 ifeq ($(wildcard $(mac_sdk_root)),)
     34 # try legacy /Developer/SDKs/MacOSX10.?.sdk
     35 mac_sdk_root := /Developer/SDKs/MacOSX$(mac_sdk_version).sdk
     36 endif
     37 ifeq ($(wildcard $(mac_sdk_root)),)
     38 $(warning *****************************************************)
     39 $(warning * Can not find SDK $(mac_sdk_version) at $(mac_sdk_root))
     40 $(warning *****************************************************)
     41 $(error Stop.)
     42 endif
     43 
     44 ifeq ($(mac_sdk_version),10.6)
     45   gcc_darwin_version := 10
     46 else
     47   gcc_darwin_version := 11
     48 endif
     49 
     50 endif  # ifndef build_mac_version
     51