如何爲armv6，armv7和i386構建fat靜態庫

Question

我按照指南Build fat static library (device + simulator) using Xcode and SDK 4+來構建libmms（https://github.com/kosher-penguin/xcode-libmms），並得到一個胖的靜態庫，但它似乎不起作用。

Undefined symbols for architecture armv7: 
    "_iconv_close", referenced from: 
     _mms_connect in libMMS.a(mms.o) 
    "_Status_GetNewStatusByKey", referenced from: 
     _report_progress in libMMS.a(mms.o) 
    "_Status_SetNewStatusByKey", referenced from: 
     _report_progress in libMMS.a(mms.o) 
    "_iconv", referenced from: 
     _string_utf16 in libMMS.a(mms.o) 
    "_iconv_open", referenced from: 
     _mms_connect in libMMS.a(mms.o) 
ld: symbol(s) not found for architecture armv7 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 

首先，我從克隆https://github.com/kosher-penguin/xcode-libmms.git 其次的代碼，我xCode4.2打開它，並添加如下：當庫添加到我的項目（xCode4.2 + iOS5.0）我有錯誤腳本運行腳本（構建階段），然後運行該項目。 第三，我將名爲libmms.a的文件複製到名爲Release-universal的文件夾中，然後將該庫添加到新項目中。 第四，在新項目中，從xcode-libmms項目添加頭文件，導入mms.h和mms_config.h，然後調用函數mms_connect，然後構建它，但得到錯誤。

DEBUG_THIS_SCRIPT="false" 

if [ $DEBUG_THIS_SCRIPT = "true" ] 
then 
echo "########### TESTS #############" 
echo "Use the following variables when debugging this script; note that they may change on recursions" 
echo "BUILD_DIR = $BUILD_DIR" 
echo "BUILD_ROOT = $BUILD_ROOT" 
echo "CONFIGURATION_BUILD_DIR = $CONFIGURATION_BUILD_DIR" 
echo "BUILT_PRODUCTS_DIR = $BUILT_PRODUCTS_DIR" 
echo "CONFIGURATION_TEMP_DIR = $CONFIGURATION_TEMP_DIR" 
echo "TARGET_BUILD_DIR = $TARGET_BUILD_DIR" 
fi 

#####################[ part 1 ]################## 
# First, work out the BASESDK version number (NB: Apple ought to report this, but they hide it) 
# (incidental: searching for substrings in sh is a nightmare! Sob) 

SDK_VERSION=$(echo ${SDK_NAME} | grep -o '.\{3\}$') 

# Next, work out if we're in SIM or DEVICE 

if [ ${PLATFORM_NAME} = "iphonesimulator" ] 
then 
OTHER_SDK_TO_BUILD=iphoneos${SDK_VERSION} 
else 
OTHER_SDK_TO_BUILD=iphonesimulator${SDK_VERSION} 
fi 

echo "XCode has selected SDK: ${PLATFORM_NAME} with version: ${SDK_VERSION} (although back-targetting: ${IPHONEOS_DEPLOYMENT_TARGET})" 
echo "...therefore, OTHER_SDK_TO_BUILD = ${OTHER_SDK_TO_BUILD}" 
# 
#####################[ end of part 1 ]################## 

#####################[ part 2 ]################## 
# 
# IF this is the original invocation, invoke WHATEVER other builds are required 
# 
# Xcode is already building ONE target... 
# 
# ...but this is a LIBRARY, so Apple is wrong to set it to build just one. 
# ...we need to build ALL targets 
# ...we MUST NOT re-build the target that is ALREADY being built: Xcode WILL CRASH YOUR COMPUTER if you try this (infinite recursion!) 
# 
# 
# So: build ONLY the missing platforms/configurations. 

if [ "true" == ${ALREADYINVOKED:-false} ] 
then 
echo "RECURSION: I am NOT the root invocation, so I'm NOT going to recurse" 
else 
# CRITICAL: 
# Prevent infinite recursion (Xcode sucks) 
export ALREADYINVOKED="true" 

echo "RECURSION: I am the root ... recursing all missing build targets NOW..." 
echo "RECURSION: ...about to invoke: xcodebuild -configuration \"${CONFIGURATION}\" -target \"${TARGET_NAME}\" -sdk \"${OTHER_SDK_TO_BUILD}\" ${ACTION} RUN_CLANG_STATIC_ANALYZER=NO" 
xcodebuild -configuration "${CONFIGURATION}" -target "${TARGET_NAME}" -sdk "${OTHER_SDK_TO_BUILD}" ${ACTION} RUN_CLANG_STATIC_ANALYZER=NO BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" 

ACTION="build" 

#Merge all platform binaries as a fat binary for each configurations. 

# Calculate where the (multiple) built files are coming from: 
CURRENTCONFIG_DEVICE_DIR=${SYMROOT}/${CONFIGURATION}-iphoneos 
CURRENTCONFIG_SIMULATOR_DIR=${SYMROOT}/${CONFIGURATION}-iphonesimulator 

echo "Taking device build from: ${CURRENTCONFIG_DEVICE_DIR}" 
echo "Taking simulator build from: ${CURRENTCONFIG_SIMULATOR_DIR}" 

CREATING_UNIVERSAL_DIR=${SYMROOT}/${CONFIGURATION}-universal 
echo "...I will output a universal build to: ${CREATING_UNIVERSAL_DIR}" 

# ... remove the products of previous runs of this script 
#  NB: this directory is ONLY created by this script - it should be safe to delete! 

rm -rf "${CREATING_UNIVERSAL_DIR}" 
mkdir "${CREATING_UNIVERSAL_DIR}" 

# 
echo "lipo: for current configuration (${CONFIGURATION}) creating output file: ${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}" 
lipo -create -output "${CREATING_UNIVERSAL_DIR}/${EXECUTABLE_NAME}" "${CURRENTCONFIG_DEVICE_DIR}/${EXECUTABLE_NAME}" "${CURRENTCONFIG_SIMULATOR_DIR}/${EXECUTABLE_NAME}" 

######### 
# 
# Added: StackOverflow suggestion to also copy "include" files 
# (untested, but should work OK) 
# 
if [ -d "${CURRENTCONFIG_DEVICE_DIR}/usr/local/include" ] 
then 
mkdir -p "${CREATING_UNIVERSAL_DIR}/usr/local/include" 
# * needs to be outside the double quotes? 
cp "${CURRENTCONFIG_DEVICE_DIR}/usr/local/include/"* "${CREATING_UNIVERSAL_DIR}/usr/local/include" 
fi 
fi 

請給我一些幫助，謝謝。

更新： 添加後libiconv的庫，錯誤如下：

Undefined symbols for architecture armv7: 
    "_Status_GetNewStatusByKey", referenced from: 
     _report_progress in libMMS.a(mms.o) 
    "_Status_SetNewStatusByKey", referenced from: 
     _report_progress in libMMS.a(mms.o) 
ld: symbol(s) not found for architecture armv7 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 

Answer 1

其中一個問題是，你的圖書館有libiconv的依賴。當你使用你的庫時，你不應該只添加libMMS，而是libiconv，它隨附任何XCode安裝。請參閱libiconv not linking to iOS project瞭解如何將其添加到項目中。

我不知道什麼依賴_Status_GetNewStatusByKey和_Status_SetNewStatusByKey。他們可能是相似的。

更新：

第二個問題是在mms.c使用功能Status_GetNewStatusByKey和Status_SetNewStatusByKey，這似乎並沒有在任何地方定義的函數report_progress()（你沒有得到警告，當你編譯庫？）。刪除所有聲明，定義或使用report_progress()。無論如何，它已在最新版本的libmms中被刪除。