如何为iPhone的armv6和armv7将la脚编译为静态库(.a)? [英] How can I compile lame as static library(.a) for armv6 and armv7 of iPhone?

问题描述

LAME(http://lame.sourceforge.net/)是用C语言编写的库.它可以将PCM声音文件转换为MP3文件.我用它将声音文件转换为iPhone上的MP3文件.源PCM声音文件是通过麦克风录制的.

LAME(http://lame.sourceforge.net/) is a library written in c language. It can convert PCM sound files to MP3 files. I use it to convert sound files to MP3 files on iPhone. The source PCM sound files is recorded by microphone.

为了将LAME包含到我的XCode项目中，我需要将LAME编译为3个静态库(.a)，用于i386(IOS Simulator)，armv6和armv7.

In order to include the LAME into my XCode Project, I need to compile the LAME to 3 static libraries(.a), for i386(IOS Simulator), armv6 and armv7.

经过大量搜索，我成功地为i368版本(iOS Simulator)编译了一个静态库.这是命令:

After a lot of search, I have complied a static library for i368 version(iOS Simulator) successfully. Here is commands:

./configure \
    CFLAGS="-isysroot  /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk" \
    CC="/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc -arch i386" \
    --prefix=/Volumes/Data/test/i386 \
    --host="arm-apple-darwin9"

make && make install

问题是我无法为armv6和armv7进行编译.我已经尝试过此命令，但是它报告错误.有没有人有解决方案?

The problem is I can not compile for armv6 and armv7. I have tried this commands but it report an error. Is there anybody have solutions?

./configure \
    CFLAGS="-isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk" \
    CC="/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -arch armv6" \
    --prefix=/Volumes/Data/test/arm6 \
    --host="arm-apple-darwin9"

make && make install

错误是:

console.c:25:21: error: curses.h: No such file or directory
console.c:27:20: error: term.h: No such file or directory
console.c: In function ‘get_termcap_string’:
console.c:92: warning: implicit declaration of function ‘tgetstr’
console.c:92: warning: assignment makes pointer from integer without a cast
console.c: In function ‘get_termcap_number’:
console.c:102: warning: implicit declaration of function ‘tgetnum’
console.c: In function ‘apply_termcap_settings’:
console.c:115: warning: implicit declaration of function ‘tgetent’
make[2]: *** [console.o] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

当我安装ncurses时，它报告了这一点:

When I install ncurses, It reported this:

../curses.h:60:25: error: ncurses_dll.h: No such file or directory
In file included from console.c:25:
../curses.h:250: warning: return type defaults to ‘int’
../curses.h: In function ‘NCURSES_EXPORT_VAR’:
../curses.h:250: error: expected declaration specifiers before ‘acs_map’
../curses.h:340: error: storage class specified for parameter ‘SCREEN’
../curses.h:341: error: storage class specified for parameter ‘WINDOW’
../curses.h:343: error: storage class specified for parameter ‘attr_t’
../curses.h:388: warning: empty declaration
../curses.h:401: error: expected specifier-qualifier-list before ‘attr_t’
../curses.h:443: warning: empty declaration
../curses.h:542: error: storage class specified for parameter ‘NCURSES_OUTC’
../curses.h:551: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘addch’
../curses.h:552: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘addchnstr’
../curses.h:553: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘addchstr’
../curses.h:554: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘addnstr’

有人可以给我一种将arm编译为armv6和armv7的静态库(.a)的方法吗?

Is there somebody can give me a way to compile LAME to static library(.a) for the armv6 and armv7?

推荐答案

您缺少一些步骤.首先，您根本不想构建前端，因为无论如何您只能将LAME用作库.您还必须静态地构建库，否则将无法将其构建到项目中.

You're missing a few steps. First of all you don't want to build the frontend at all since you'll only be able to use LAME as a library anyhow. You also have to build the library statically otherwise you won't be able to build it into your project.

基本上，您必须设置源代码树并将其编译四次，一次用于模拟器(i686)，iPhone(armv6)，iPad(armv7)和iPhone 5(armv7s)，然后将.a文件打包为一个通用图书馆.当您编译项目的其余部分时，Xcode链接器将为您整理其他所有内容.

Basically, you have to setup the source tree and compile it four times, once for the simulator (i686), iPhone (armv6), iPad (armv7) and iPhone 5 (armv7s) then lipo the .a files together into a universal library. The Xcode linker will sort everything else out for you when you compile the rest of your project.

我使用此shell脚本构建了通用的libmp3lame.a文件.请注意，这使用Xcode 4.3路径和iOS 5.1编译器.

I used this shell script to build a universal libmp3lame.a file. Note this uses Xcode 4.3 paths and iOS 5.1 compilers.

#!/bin/bash

SDK_VERSION="5.1"

mkdir build

function build_lame()
{
    make distclean

    ./configure \
        CFLAGS="-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/${SDK}.platform/Developer/SDKs/${SDK}${SDK_VERSION}.sdk" \
        CC="/Applications/Xcode.app/Contents/Developer/Platforms/${SDK}.platform/Developer/usr/bin/gcc -arch ${PLATFORM}" \
        --prefix=/Users/mcrute/Desktop/lame \
        --host="arm-apple-darwin9" \
        --disable-shared \
        --enable-static \
        --disable-decoder \
        --disable-frontend

    make
    cp "libmp3lame/.libs/libmp3lame.a" "build/libmp3lame-${PLATFORM}.a"
}

PLATFORM="i686"
SDK="iPhoneSimulator"
build_lame

PLATFORM="armv6"
SDK="iPhoneOS"
build_lame

PLATFORM="armv7"
build_lame

PLATFORM="armv7s"
build_lame

lipo -create build/* -output build/libmp3lame.a

将./build中的libmp3lame.a文件与包含目录中的lame.h文件一起放入Xcode项目中，您应该已经准备好在模拟器或真实设备中使用lame.

Take the libmp3lame.a file from ./build along with the lame.h file from the include directory and drop them in your Xcode project and you should be ready to use lame in either the simulator or a real device.

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