osgearth IOS版本编译
1、准备工作
文档参照：Building osgEarth for IOS Generating an IOS XCode Project
1.1、Mac OS
Mac OS 10.8.3
1.2、XCode
XCode 4.6(4H127)
1.3、CMake
CMake 2.8.12.1
1.4、svn
随便安装个能下载代码的就行
1.5、代码下载
OpenSceneGraph3.2.1-rc1 osgearth2.4
项目工程目录：
osgearth-build
-- osg-ios
-- osgearth-ios
-- 3rdparty
1.6、3rdparty下载
ios 3rdparty JavaScriptCore
1.7、OSGEarth IOS下载
osgearth ios application，只需要拷贝osgearth/src/applications/osgearth_viewIOS工程即可，其他部分仍使用下载的IOS代码
1.8、Xcode开发者许可证
编译前必须搞定Xcode开发者许可证，否则编译过程报错。
2、工程生成、编译
2.1、OSG IOS工程编译
2.1.1、SDK路径确认、修改配置
Check /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs // 检查该路径是否存在、SDK版本 Open CMakeList.txt and change line 236 to your SDK version: (SET (IPHONE_SDKVER "5.1" CACHE STRING "IOS SDK-Version") // 设置SDK版本，Xcode4.6默认使用6.1SDK
2.1.2、启动CMake，确认配置项
Use below command line to generate static GLES2 build for iOS devices, change 3rdparty paths to reflect your 3rdparty path
cd ./osg-ios
cmake ./ -G Xcode -DOSG_BUILD_PLATFORM_IPHONE:BOOL=ON \
-DBUILD_OSG_APPLICATIONS:BOOL=OFF \
-DOSG_WINDOWING_SYSTEM:STRING=IOS \
-DOSG_DEFAULT_IMAGE_PLUGIN_FOR_OSX="imageio" \
-DOSG_GL1_AVAILABLE:BOOL=OFF \
-DOSG_GL2_AVAILABLE:BOOL=OFF \
-DOSG_GLES1_AVAILABLE:BOOL=OFF \
-DOSG_GLES2_AVAILABLE:BOOL=ON \
-DOSG_GL_DISPLAYLISTS_AVAILABLE:BOOL=OFF \
-DOSG_GL_FIXED_FUNCTION_AVAILABLE:BOOL=OFF \
-DOSG_GL_LIBRARY_STATIC:BOOL=OFF \
-DOSG_GL_MATRICES_AVAILABLE:BOOL=OFF \
-DOSG_GL_VERTEX_ARRAY_FUNCS_AVAILABLE:BOOL=OFF \
-DOSG_GL_VERTEX_FUNCS_AVAILABLE:BOOL=OFF \
-DCURL_INCLUDE_DIR:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/curl-ios-device/include" \
-DCURL_LIBRARY:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/curl-ios-device/lib/libcurl.a" \
-DFREETYPE_INCLUDE_DIR_freetype2:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/freetype-ios-universal/include/freetype" \
-DFREETYPE_INCLUDE_DIR_ft2build:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/freetype-ios-universal/include" \
-DFREETYPE_LIBRARY:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/freetype-ios-universal/lib/libFreeType_iphone_universal.a" \
-DTIFF_INCLUDE_DIR:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/tiff-ios-device/include" \
-DTIFF_LIBRARY:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/tiff-ios-device/lib/libtiff.a" \
-DGDAL_INCLUDE_DIR:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/gdal-ios-device/include" \
-DGDAL_LIBRARY:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/gdal-ios-device/lib/libgdal.a" \
-DDYNAMIC_OPENSCENEGRAPH:BOOL=OFF \
-DDYNAMIC_OPENTHREADS:BOOL=OFF
参照上面的配置表，确认CMake配置。CMake默认使用Mac OS的配置，当配置完OSG_BUILD_PLATFORM_IPHONE后，最好点击下"Configure"，再确定"OSG_WINDOWING_SYSTEM"的值是否为IOS，否则配置错误。需要将以上的第三方库的头文件、路径改成项目的路径。
再检查：
CMake uses the CMAKE_OSX_SYSROOT variable to know where the iOS sdk is located. OSG will automatically set this to
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk
If you use a different sdk or your sdk is installed in a different location change CMAKE_OSX_SYSROOT to point to the correct location
You can also specify a different sdk number as the minimum requirement, this is set via the -miphoneos-version-min option in the CMAKE_CXX_FLAGS, by default this is set to 4.0. If using the CMake GUI you may need to tick 'Advanced' in order to see the CMAKE_CXX_FLAGS setting. 确认：CMAKE_OSX_SYSROOT的路径为
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk，Xcode默认路径为MacOS.platform的开发路径，需要修改。（
/Applications/Xcode.app/Contents/Developer/Platforms，目录下有MacOS.platform、iPhoneOS.platform、iPhoneSimulator.platform，配置工程对应的平台）确认：CMAKE_CXX_FLAGS：中是否包含-miphoneos-version-min=4.0，如果包含-mmacos-version-min=10.8，需去除
CMake生成工程
2.1.3、连接设备，启动Xcode，编译osg
2.2、osgearth工程编译
2.2.1、cmake配置，生成工程
cmake ./ -G Xcode -DOSG_BUILD_PLATFORM_IPHONE:BOOL=ON \ -DOSG_DIR:PATH="/Users/hogbox/Documents/osgearth-build/osg-ios" \ -DCURL_INCLUDE_DIR:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/curl-ios-device/include" \ -DCURL_LIBRARY:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/curl-ios-device/lib/libcurl.a" \ -DGDAL_INCLUDE_DIR:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/gdal-ios-device/include" \ -DGDAL_LIBRARY:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/gdal-ios-device/lib/libgdal.a" \ -DGEOS_INCLUDE_DIR:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/geos-ios-device/include/source/headers" \ -DGEOS_LIBRARY:PATH="/Users/hogbox/Documents/osgearth-build/3rdParty/geos-ios-device/lib/libGEOS_3.2.a" \ -DOSGEARTH_BUILD_APPLICATION_BUNDLES:BOOL=OFF \ -DDYNAMIC_OSGEARTH:BOOL=OFF \ -DOSGEARTH_USE_QT:BOOL=OFF根据以上配置内容，确认CMake配置，并生成osgearth ios工程文件。
2.2.2、连接设备，启动Xcode，编译osgearth
2.2.3、编译工程可能遇到的错误处理
2.2.3.1、stat64错误
跟踪代码，可发现此错误由于没有找到工程对应的平台TargetConditionals.h，只要将报错的Target的“Framework Search Paths"，修改为：
2.2.3.2、Unknown archivement错误
只要将报错的Target的“Framework Search Paths"，修改为：/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/System/Library/Frameworks
2.2.3.3、-mmacos-version-min错误
由于当前编译的是iphoneos，所以需要将-mmacos-version-min宏删除
2.2.3.4、not found "osg/config"错误
openscenegraph3.2.1/build/include路径找不到报错，在Target的“Header Search Paths"中添加此路径即可。
2.2.3.5、Undefined Symbols for Architecture armv7 错误
Architecture的版本取决于你使用的硬件，iphone5s使用armv7、armv7s，项目使用的是armv6、armv7。虚拟机编译使用的是i386
2.2.3.6、神奇的报错（找不出原有的神奇报错）
只要将报错的Target的“Framework Search Paths"，修改为：/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/System/Library/Frameworks
2.3 osgearthView_IOS编译
从github下载代码，下载路径见前面的说明，工程下载后，只需要将osgearth/src/applications/osgearthView_IOS文件夹拷过来即可。
最好联机编译，之前编译的osg、osgearth都是联机编译的库。（虚拟机的还没试过）
配置osg、osgearth的头文件、库文件，系统framework。
编译到最后是，osgearthView_IOS工程需要拷贝osgearth目录下的tests、data、moon_1024....png，还有gdal_data（最好上gdal网站下载，再将data文件夹拷贝到xcode工程中）
3、osgearthView_IOS运行
今天设备被拿走，还没编译完，待编译完，再续。
ps：下午拿到设备，将osgearthView_IOS打到iPhone5上运行，闪退。