在学习FFMPEG的过程中遇到了SDL，但将SDL头文件引入ios项目的时候，发现找不到头文件 -_-！SDL加入项目是需要通用库和头文件的。
我现在的需求是一个能适配iPhone4以上机型和模拟器的通用库。
别急，先回忆一下各个机型和arm体系结构的关系:
Armv6 --- iPhone3G (都老掉牙了，亲~)
Armv7 --- iPhone3GS/4 or iPad
Armv7s --- iPhone5
Simulator --- i386（这个就不属于arm体系了）
对于打库之类的神马，我个人觉得比较麻烦，网上版本很多，解释具体原因的却很少，而且很多资料都过时了，不适应现在的需求。
不过你如果感兴趣，了解一下也是很好的，这里有一篇老外的比较新的blog：
《How to prepare your mac for ios development with ffmpeg libraries》，
详细告诉了我们在打静态通用库（XXX.a）的步骤，就只有一个Perl脚本，算是比较基础的了。你可以从中看到一些配置项，对你以后理解各种脚本是有好处的。
这里有两个链接：
1.
https://bitbucket.org/DavidLudwig/sdl/src/a325f77bae36?at=default2.
https://github.com/manifest/sdl-ios-framework第一个链接我还没尝试过，好像是一个shell脚本，用来生成所需的通用库和头文件的。
我主要是尝试的第二个脚本，貌似是用Python写的，很好理解，只是我对其中的各种环境变量比较生疏。
贴上执行脚本的readme，说的是执行脚本的前提条件，链接里也能找到：
Depends on
tools, you could install them with homebrew brew install hg
rubygems, you could install them with sudo gem install colorize
What frameworks are available?
- SDL
- SDL_image
- SDL_mixer
- Tremor
How to use?
rake or rake SDL :build to download sources and build SDL.framework
rake build_all :to download and install all available frameworks
仔细看了一下，发现这个脚本只是用来生成适配Armv7和Simulator的通用库，可是我还需要匹配Armv7s。
没办法，硬着头皮改了一下吧。
经过一遍又一遍的尝试，终于被我改好了，附上
rakefile文件：
# ------------------------------------------------------------------------------
# Builds a SDL framework for the iOS
# Copyright (c) 2011-2012 Andrei Nesterov
# See LICENSE for licensing information
# ------------------------------------------------------------------------------
#
# Creates a pseudo-framework which could be used to build iOS applications for
# both simulator and device
#
# ------------------------------------------------------------------------------
#
# Depends on tools:
# hg
# git
# svn
#
# Depends on rubygems:
# colorize
#
# ------------------------------------------------------------------------------
#
# To configure the script, define:
# Conf configuration (:release or :debug)
# Arch1 architecture for the device's library (e.g. :armv7)
# Arch2 architecture for the device's library (e.g. :armv7s)
# SDK version number of the iOS SDK (e.g. "4.3")
#
# ------------------------------------------------------------------------------
require 'rubygems'
require 'colorize'
require 'find'
# --- Configure ----------------------------------------------------------------
module Configure
Conf = :release
Arch1 = :armv7
Arch2 = :armv7s
SDK = '6.1'
end
# --- Constants ----------------------------------------------------------------
module Global
RootDir = Dir.pwd
TemplatesDir = "#{RootDir}/templates"
SourcesDir = "#{RootDir}/src"
BuildDir = "#{RootDir}/build"
end
# --- Common -------------------------------------------------------------------
def message(text)
tailSize = 75 - text.length;
puts "\n>>> #{text} #{'-' * (tailSize < 0 ? 0 : tailSize)}".green
end
def refresystem_dir(path)
system %{ rm -rf #{path} } if FileTest.exists? path
system %{ mkdir -p #{path} }
end
module Builder
def build_library(project, dest, target, conf, sdk, arch)
dest = library_bundle_path(dest, conf, sdk, arch)
sdk, arch = compute_platform(sdk, arch)
args = []
args << %{-sdk "#{sdk}"}
args << %{-configuration "#{conf}"}
args << %{-target "#{target}"}
args << %{-arch "#{arch.to_str}"}
args << %{-project "#{project}"}
args << %{TARGETED_DEVICE_FAMILY="1,2"}
args << %{BUILT_PRODUCTS_DIR="build"}
args << %{CONFIGURATION_BUILD_DIR="#{dest}"}
args << %{CONFIGURATION_TEMP_DIR="#{dest}.build"}
refresystem_dir dest
Dir.chdir File.dirname(project) do
system %{xcodebuild #{args.join " "}}
end
end
def build_framework_library(frameworkLib, deviceLib1, deviceLib2, simulatorLib)
refresystem_dir(File.dirname(frameworkLib))
system %{lipo -create #{deviceLib1} #{deviceLib2} #{simulatorLib} -o #{frameworkLib}}
end
def build_framework(name, version, identifier, dest, headers, project, target, conf, sdk, arch1, arch2)
build_library(project, dest, target, conf, sdk, arch1);
build_library(project, dest, target, conf, sdk, arch2);
build_library(project, dest, target, conf, sdk, :i386);
libFileName = nil
Find.find(library_bundle_path(dest, conf, sdk, arch1)) do |path|
libFileName = File.basename(path) if path =~ /\A.*\.a\z/
end
Find.find(library_bundle_path(dest, conf, sdk, arch2)) do |path|
libFileName = File.basename(path) if path =~ /\A.*\.a\z/
end
libFilePath = "#{dest}/universal-#{conf}/#{libFileName}"
build_framework_library(
libFilePath,
"#{library_bundle_path(dest, conf, sdk, arch1)}/#{libFileName}",
"#{library_bundle_path(dest, conf, sdk, arch2)}/#{libFileName}",
"#{library_bundle_path(dest, conf, sdk, :i386)}/#{libFileName}"
)
create_framework(name, version, identifier, dest, headers, libFilePath)
end
def create_framework(name, version, identifier, dest, headers, lib)
frameworkVersion = "A"
frameworkBundle = framework_bundle_path(dest, name)
# creating framework's directories
refresystem_dir frameworkBundle
system %{ mkdir "#{frameworkBundle}/Versions" }
system %{ mkdir "#{frameworkBundle}/Versions/#{frameworkVersion}" }
system %{ mkdir "#{frameworkBundle}/Versions/#{frameworkVersion}/Resources" }
system %{ mkdir "#{frameworkBundle}/Versions/#{frameworkVersion}/Headers" }
system %{ mkdir "#{frameworkBundle}/Versions/#{frameworkVersion}/Documentation" }
# creating framework's symlinks
system %{ ln -s "#{frameworkVersion}" "#{frameworkBundle}/Versions/Current" }
system %{ ln -s "Versions/Current/Headers" "#{frameworkBundle}/Headers" }
system %{ ln -s "Versions/Current/Resources" "#{frameworkBundle}/Resources" }
system %{ ln -s "Versions/Current/Documentation" "#{frameworkBundle}/Documentation" }
system %{ ln -s "Versions/Current/#{File.basename lib}" "#{frameworkBundle}/#{name}" }
# copying lib
system %{ cp "#{lib}" "#{frameworkBundle}/Versions/#{frameworkVersion}" }
# copying includes
FileList["#{headers}/*.h"].each do |source|
system %{ cp "#{source}" "#{frameworkBundle}/Headers" }
end
# creating plist
File.open("#{frameworkBundle}/Resources/Info.plist", "w") do |f|
f.puts '<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">'
f.puts "<dict>
<key>CFBundleDevelopmentRegion</key>
<string>Englisystem</string>
<key>CFBundleExecutable</key>
<string>#{name}</string>
<key>CFBundleIdentifier</key>
<string>#{identifier}</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundlePackageType</key>
<string>FMWK</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>#{version}</string>
</dict>
</plist>"
end
end
def library_bundle_path(path, conf, sdk, arch)
sdk, arch = compute_platform(sdk, arch)
"#{path}/#{sdk}-#{arch}-#{conf}"
end
def framework_bundle_path(path, name)
"#{path}/#{name}.framework"
end
def compute_platform(sdk, arch)
return [sdk, arch] if arch.class == String
[arch == :i386 ? "iphonesimulator" + sdk : "iphoneos" + sdk, arch.to_s]
end
private :library_bundle_path, :framework_bundle_path, :compute_platform
end
# --- Package ------------------------------------------------------------------
class Package
extend Builder
def self.build(conf, sdk, arch1, arch2)
download
unpack
install(config(conf), sdk, arch1, arch2)
end
def self.unpack
end
def self.config conf
conf == :release ? "Release" : "Debug"
end
end
# --- SDL ----------------------------------------------------------------------
class SDL < Package
ProjFile = "SDL.xcodeproj"
SourcesDir = (FileTest.exists? ProjFile) ? "#{Global::RootDir}/../.." : "#{Global::SourcesDir}/SDL"
BuildDir = "#{Global::BuildDir}/sdl"
Version = "2.0"
def self.download
message "downloading SDL"
system %{hg clone "http://hg.libsdl.org/SDL" "#{SourcesDir}"}
end
def self.install(conf, sdk, arch1, arch2)
message "building SDL"
self.build_framework(
"SDL",
Version,
"org.libsdl",
BuildDir,
"#{SourcesDir}/include",
"#{SourcesDir}/Xcode-iOS/SDL/#{ProjFile}",
"libSDL",
conf,
sdk,
arch1,
arch2
)
end
end
# --- SDL_image ----------------------------------------------------------------
class SDL_image < Package
SourcesDir = "#{Global::SourcesDir}/sdl_image"
BuildDir = "#{Global::BuildDir}/sdl_image"
Version = "1.2.12"
def self.download
message "downloading SDL_image"
system %{hg clone "http://hg.libsdl.org/SDL_image" "#{SourcesDir}"}
end
def self.install(conf, sdk, arch1, arch2)
message "building SDL_image"
self.build_framework(
"SDL_image",
Version,
"org.libsdl",
BuildDir,
"#{SourcesDir}",
"#{SourcesDir}/Xcode-iOS/SDL_image.xcodeproj",
"libSDL_image",
conf,
sdk,
arch1,
arch2
)
end
end
# --- SDL_mixer ----------------------------------------------------------------
class SDL_mixer < Package
SourcesDir = "#{Global::SourcesDir}/sdl_mixer"
BuildDir = "#{Global::BuildDir}/sdl_mixer"
Version = "1.2.12"
def self.download
message "downloading SDL_mixer"
system %{hg clone "http://hg.libsdl.org/SDL_mixer" "#{SourcesDir}"}
end
def self.install(conf, sdk, arch1, arch2)
message "creating links on vorbis headers for successful SDL_mixer building"
refresystem_dir(headersDir = "#{Global::SourcesDir}/libtremor")
system %{ ln -s "#{Tremor::BuildDir}/vorbis.framework/Headers" "#{headersDir}/ogg" }
system %{ ln -s "#{Tremor::BuildDir}/vorbis.framework/Headers" "#{headersDir}/tremor" }
message "building SDL_mixer"
self.build_framework(
"SDL_mixer",
Version,
"org.libsdl",
BuildDir,
"#{SourcesDir}",
"#{SourcesDir}/Xcode-iOS/SDL_mixer.xcodeproj",
"Static Library",
conf,
sdk,
arch1,
arch2
)
system %{ rm -rf #{headersDir} }
end
end
# --- Tremor -------------------------------------------------------------------
class Tremor < Package
SourcesDir = "#{Global::SourcesDir}/cocos2d"
BuildDir = "#{Global::BuildDir}/tremor"
Version = "1.3.2"
def self.download
message "downloading Cocos2d"
system %{git clone "https://github.com/cocos2d/cocos2d-iphone.git" "#{SourcesDir}"}
end
def self.install(conf, sdk, arch1, arch2)
message "switching to v1.x brunch"
Dir.chdir(SourcesDir) do
system 'git checkout master'
end
message "building Tremor"
self.build_framework(
"vorbis",
Version,
"org.xiph",
BuildDir,
"#{SourcesDir}/external/Tremor",
"#{SourcesDir}/cocos2d-ios.xcodeproj",
"vorbis",
conf,
sdk,
arch1,
arch2
)
end
end
# --- Tasks --------------------------------------------------------------------
require 'rake/clean'
Libs = [:SDL, :SDL_image, :Tremor, :SDL_mixer]
desc "Download sources and build SDL.framework"
task :default => ["SDL:build"] do
end
desc "Download sources and build all targets [#{Libs.join ", "}]"
task :build_all do
Libs.each do |classname|
Object.const_get(classname).build Configure::Conf, Configure::SDK, Configure::Arch1, Configure::Arch2
end
end
Libs.each do |classname|
namespace classname do
obj = Object.const_get(classname)
desc "Download sources and build #{classname}.framework"
task :build do
obj.build Configure::Conf, Configure::SDK, Configure::Arch1, Configure::Arch2
end
desc "Only download #{classname} sources"
task :download do
obj.download
obj.unpack
end
desc "Only build #{classname}.framework"
task :install do
obj.install Configure::Conf, Configure::SDK, Configure::Arch1, Configure::Arch2
end
desc "Remove all files associated with #{classname}"
task :clobber do
CLOBBER = Rake::FileList.new
CLOBBER.include obj::SourcesDir, obj::BuildDir
Rake::Task[:clobber].execute
end
end
end
CLOBBER.include Global::SourcesDir, Global::BuildDir
一切都是自动化安装，
稍微注意一下的是自己的sdk版本，我的是6.1。
还有最后一个小问题，SDL需要4个framework支持：
CoreGraphics
QuartzCore
OpenGLES
AudioToolbox
所以ios项目也要对应的引入这4个framework。
posted on 2013-07-30 17:39
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