iOS编译Libevent库及踩坑例程

参考脚本

https://github.com/OnionBrowser/OnionBrowser/blob/master/build-libevent.sh

生成的库在dependencies路径下。

问题1

COULD NOT VERIFY PACKAGE SIGNATURE...

解决方案：

修改脚本中的 VERIFYGPG=false

问题2

configure: error: cannot run C compiled programs.

If you meant to cross compile, use `--host'.

See `config.log' for more details

解决方案：

去掉模拟器架构，修改ARCHS="armv7 arm64"

问题3

configure: error: openssl is a must but can not be found. You should add the directory containing openssl.pc' to thePKG_CONFIG_PATH' environment variable, or set CFLAGS' andLDFLAGS' directly for openssl, or use `--disable-openssl' to disable support for openssl encryption

解决方案：

脚本中加入--disable-openssl，即修改为

./configure --disable-shared --enable-static --disable-debug-mode --disable-openssl ${EXTRA_CONFIG} \

修改后的完整脚本参考如下

#!/bin/bash

# Builds libevent for all five current iPhone targets: iPhoneSimulator-i386,

# iPhoneSimulator-x86_64, iPhoneOS-armv7, iPhoneOS-armv7s, iPhoneOS-arm64.

#

# Copyright 2012-2016 Mike Tigas <mike AT tig DOT as>

#

# Based on "build-libssl.sh" in OpenSSL-for-iPhone by Felix Schulze,

# forked on 2012-02-24. Original license follows:

# Copyright 2010 Felix Schulze. All rights reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

###########################################################################

# Choose your libevent version and your currently-installed iOS SDK version:

#

VERSION="2.1.12-stable"

USERSDKVERSION="15.5"

MINIOSVERSION="10.0"

VERIFYGPG=false

export https_proxy=http://127.0.0.1:7890 http_proxy=http://127.0.0.1:7890 all_proxy=socks5://127.0.0.1:7890

###########################################################################

#

# Don't change anything under this line!

#

###########################################################################

# No need to change this since xcode build will only compile in the

# necessary bits from the libraries we create

#ARCHS="i386 x86_64 armv7 arm64"

ARCHS="armv7 arm64"

DEVELOPER=`xcode-select -print-path`

#DEVELOPER="/Applications/Xcode.app/Contents/Developer"

# for continuous integration

# https://travis-ci.org/mtigas/iOS-OnionBrowser

if [ "$1" == "--noverify" ]; then

VERIFYGPG=false

fi

if [ "$2" == "--travis" ]; then

ARCHS="i386 x86_64"

fi

if [[ ! -z "$TRAVIS" && $TRAVIS ]]; then

# Travis CI highest available version

echo "==================== TRAVIS CI ===================="

SDKVERSION="9.3"

else

SDKVERSION="$USERSDKVERSION"

fi

cd "`dirname \"$0\"`"

REPOROOT=$(pwd)

# Where we'll end up storing things in the end

OUTPUTDIR="${REPOROOT}/dependencies"

mkdir -p ${OUTPUTDIR}/include

mkdir -p ${OUTPUTDIR}/lib

BUILDDIR="${REPOROOT}/build"

# where we will keep our sources and build from.

SRCDIR="${BUILDDIR}/src"

mkdir -p $SRCDIR

# where we will store intermediary builds

INTERDIR="${BUILDDIR}/built"

mkdir -p $INTERDIR

########################################

cd $SRCDIR

# Exit the script if an error happens

set -e

if [ ! -e "${SRCDIR}/libevent-${VERSION}.tar.gz" ]; then

echo "Downloading libevent-${VERSION}.tar.gz"

curl -LO https://github.com/libevent/libevent/releases/download/release-${VERSION}/libevent-${VERSION}.tar.gz

fi

echo "Using libevent-${VERSION}.tar.gz"

# up to you to set up `gpg` and add keys to your keychain

# may have to import from link on http://www.wangafu.net/~nickm/ or http://www.citi.umich.edu/u/provos/

if $VERIFYGPG; then

if [ ! -e "${SRCDIR}/libevent-${VERSION}.tar.gz.asc" ]; then

curl -LO https://github.com/libevent/libevent/releases/download/release-${VERSION}/libevent-${VERSION}.tar.gz.asc

fi

echo "Using libevent-${VERSION}.tar.gz.asc"

if out=$(gpg --status-fd 1 --verify "libevent-${VERSION}.tar.gz.asc" "libevent-${VERSION}.tar.gz" 2>/dev/null) &&

echo "$out" | grep -qs "^\[GNUPG:\] VALIDSIG"; then

echo "$out" | egrep "GOODSIG|VALIDSIG"

echo "Verified GPG signature for source..."

else

echo "$out" >&2

echo "COULD NOT VERIFY PACKAGE SIGNATURE..."

exit 1

fi

fi

tar zxf libevent-${VERSION}.tar.gz -C $SRCDIR

cd "${SRCDIR}/libevent-${VERSION}"

set +e # don't bail out of bash script if ccache doesn't exist

CCACHE=`which ccache`

if [ $? == "0" ]; then

echo "Building with ccache: $CCACHE"

CCACHE="${CCACHE} "

else

echo "Building without ccache"

CCACHE=""

fi

set -e # back to regular "bail out on error" mode

export ORIGINALPATH=$PATH

for ARCH in ${ARCHS}

do

if [ "${ARCH}" == "i386" ] || [ "${ARCH}" == "x86_64" ];

then

PLATFORM="iPhoneSimulator"

EXTRA_CONFIG=""

else

PLATFORM="iPhoneOS"

EXTRA_CONFIG="--host=arm-apple-darwin14"

fi

mkdir -p "${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk"

export PATH="${DEVELOPER}/Toolchains/XcodeDefault.xctoolchain/usr/bin/:${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/usr/bin/:${DEVELOPER}/Toolchains/XcodeDefault.xctoolchain/usr/bin:${DEVELOPER}/usr/bin:${ORIGINALPATH}"

export CC="${CCACHE}`which gcc` -arch ${ARCH} -miphoneos-version-min=${MINIOSVERSION}"

./configure --disable-shared --enable-static --disable-debug-mode --disable-openssl ${EXTRA_CONFIG} \

--prefix="${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk" \

LDFLAGS="$LDFLAGS -L${OUTPUTDIR}/lib" \

CFLAGS="$CFLAGS -Os -I${OUTPUTDIR}/include -isysroot ${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk" \

CPPFLAGS="$CPPFLAGS -I${OUTPUTDIR}/include -isysroot ${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk"

# Build the application and install it to the fake SDK intermediary dir

# we have set up. Make sure to clean up afterward because we will re-use

# this source tree to cross-compile other targets.

make -j$(sysctl hw.ncpu | awk '{print $2}')

make install

make clean

done

########################################

echo "Build library..."

# These are the libs that comprise libevent. `libevent_openssl` and `libevent_pthreads`

# may not be compiled if those dependencies aren't available.

OUTPUT_LIBS="libevent.a libevent_core.a libevent_extra.a libevent_openssl.a libevent_pthreads.a"

for OUTPUT_LIB in ${OUTPUT_LIBS}; do

INPUT_LIBS=""

for ARCH in ${ARCHS}; do

if [ "${ARCH}" == "i386" ] || [ "${ARCH}" == "x86_64" ];

then

PLATFORM="iPhoneSimulator"

else

PLATFORM="iPhoneOS"

fi

INPUT_ARCH_LIB="${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk/lib/${OUTPUT_LIB}"

if [ -e $INPUT_ARCH_LIB ]; then

INPUT_LIBS="${INPUT_LIBS} ${INPUT_ARCH_LIB}"

fi

done

# Combine the three architectures into a universal library.

if [ -n "$INPUT_LIBS"  ]; then

lipo -create $INPUT_LIBS \

-output "${OUTPUTDIR}/lib/${OUTPUT_LIB}"

else

echo "$OUTPUT_LIB does not exist, skipping (are the dependencies installed?)"

fi

done

for ARCH in ${ARCHS}; do

if [ "${ARCH}" == "i386" ] || [ "${ARCH}" == "x86_64" ];

then

PLATFORM="iPhoneSimulator"

else

PLATFORM="iPhoneOS"

fi

cp -R ${INTERDIR}/${PLATFORM}${SDKVERSION}-${ARCH}.sdk/include/* ${OUTPUTDIR}/include/

if [ $? == "0" ]; then

# We only need to copy the headers over once. (So break out of forloop

# once we get first success.)

break

fi

done

####################

echo "Building done."

echo "Cleaning up..."

rm -fr ${INTERDIR}

rm -fr "${SRCDIR}/libevent-${VERSION}"

echo "Done."