Added: Xcode checks and specific flags

Changed: Target by default Mac OS X 10.6 if not specified
Changed: Add -isysroot, -arch and -mmacosx-version-min flags if needed

code/CMakeModules/nel.cmake

@@ -387,6 +387,11 @@ MACRO(NL_SETUP_BUILD)
     MESSAGE(STATUS "Using Clang compiler")
   ENDIF(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
 
+  IF(CMAKE_GENERATOR MATCHES "Xcode")
+    SET(XCODE ON)
+    MESSAGE(STATUS "Generating Xcode project")
+  ENDIF(CMAKE_GENERATOR MATCHES "Xcode")
+
   # If target and host CPU are the same
   IF("${HOST_CPU}" STREQUAL "${TARGET_CPU}")
     # x86-compatible CPU
@@ -491,13 +496,27 @@ MACRO(NL_SETUP_BUILD)
     SET(NL_DEBUG_LINKFLAGS "/DEBUG /OPT:NOREF /OPT:NOICF /NODEFAULTLIB:msvcrt /INCREMENTAL:YES ${NL_DEBUG_LINKFLAGS}")
     SET(NL_RELEASE_LINKFLAGS "/OPT:REF /OPT:ICF /INCREMENTAL:NO ${NL_RELEASE_LINKFLAGS}")
   ELSE(MSVC)
-    IF(HOST_CPU STREQUAL "x86_64" AND TARGET_CPU STREQUAL "x86")
-      SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -m32 -march=i686")
-    ENDIF(HOST_CPU STREQUAL "x86_64" AND TARGET_CPU STREQUAL "x86")
+    IF(WIN32)
+      SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -DWIN32 -D_WIN32")
+    ENDIF(WIN32)
 
-    IF(HOST_CPU STREQUAL "x86" AND TARGET_CPU STREQUAL "x86_64")
-      SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -m64")
-    ENDIF(HOST_CPU STREQUAL "x86" AND TARGET_CPU STREQUAL "x86_64")
+    IF(APPLE)
+      IF(TARGET_CPU STREQUAL "x86")
+        SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -arch i386")
+      ENDIF(TARGET_CPU STREQUAL "x86")
+
+      IF(TARGET_CPU STREQUAL "x86_64")
+        SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -arch x86_64")
+      ENDIF(TARGET_CPU STREQUAL "x86_64")
+    ELSE(APPLE)
+      IF(HOST_CPU STREQUAL "x86_64" AND TARGET_CPU STREQUAL "x86")
+        SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -m32 -march=i686")
+      ENDIF(HOST_CPU STREQUAL "x86_64" AND TARGET_CPU STREQUAL "x86")
+
+      IF(HOST_CPU STREQUAL "x86" AND TARGET_CPU STREQUAL "x86_64")
+        SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -m64")
+      ENDIF(HOST_CPU STREQUAL "x86" AND TARGET_CPU STREQUAL "x86_64")
+    ENDIF(APPLE)
 
     SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -D_REENTRANT -pipe -ftemplate-depth-48 -Wall -W -Wpointer-arith -Wsign-compare -Wno-deprecated-declarations -Wno-multichar -Wno-unused -fno-strict-aliasing")
 
@@ -513,6 +532,41 @@ MACRO(NL_SETUP_BUILD)
       SET(PLATFORM_CFLAGS "-gdwarf-2 ${PLATFORM_CFLAGS}")
     ENDIF(APPLE)
 
+    IF(APPLE AND XCODE)
+      SET(CMAKE_OSX_SYSROOT "macosx" CACHE PATH "" FORCE)
+    ELSEIF(APPLE AND NOT XCODE)
+      IF(NOT CMAKE_OSX_DEPLOYMENT_TARGET)
+        SET(CMAKE_OSX_DEPLOYMENT_TARGET "10.6")
+      ENDIF(NOT CMAKE_OSX_DEPLOYMENT_TARGET)
+
+      FOREACH(_SDK ${_CMAKE_OSX_SDKS})
+        IF(${_SDK} MATCHES "MacOSX${CMAKE_OSX_DEPLOYMENT_TARGET}\\.sdk")
+          SET(CMAKE_OSX_SYSROOT ${_SDK} CACHE PATH "" FORCE)
+        ENDIF(${_SDK} MATCHES "MacOSX${CMAKE_OSX_DEPLOYMENT_TARGET}\\.sdk")
+      ENDFOREACH(_SDK)
+
+      IF(CMAKE_OSX_SYSROOT)
+        SET(PLATFORM_CFLAGS "-isysroot ${CMAKE_OSX_SYSROOT} ${PLATFORM_CFLAGS}")
+      ELSE(CMAKE_OSX_SYSROOT)
+        MESSAGE(FATAL_ERROR "CMAKE_OSX_SYSROOT can't be determinated")
+      ENDIF(CMAKE_OSX_SYSROOT)
+
+      IF(CMAKE_OSX_ARCHITECTURES)
+        FOREACH(_ARCH ${CMAKE_OSX_ARCHITECTURES})
+          SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -arch ${_ARCH}")
+        ENDFOREACH(_ARCH)
+      ENDIF(CMAKE_OSX_ARCHITECTURES)
+      IF(CMAKE_C_OSX_DEPLOYMENT_TARGET_FLAG)
+        SET(PLATFORM_CFLAGS "${PLATFORM_CFLAGS} -mmacosx-version-min=${CMAKE_OSX_DEPLOYMENT_TARGET}")
+      ENDIF(CMAKE_C_OSX_DEPLOYMENT_TARGET_FLAG)
+
+      SET(PLATFORM_LINKFLAGS "${PLATFORM_LINKFLAGS} -Wl,-headerpad_max_install_names")
+
+      IF(HAVE_FLAG_SEARCH_PATHS_FIRST)
+        SET(PLATFORM_LINKFLAGS "-Wl,-search_paths_first ${PLATFORM_LINKFLAGS}")
+      ENDIF(HAVE_FLAG_SEARCH_PATHS_FIRST)
+    ENDIF(APPLE AND XCODE)
+
     # Fix "relocation R_X86_64_32 against.." error on x64 platforms
     IF(TARGET_X64 AND WITH_STATIC AND NOT WITH_STATIC_DRIVERS)
       SET(PLATFORM_CFLAGS "-fPIC ${PLATFORM_CFLAGS}")