build-protobuf-2.5.0.sh

#!/bin/bash

echo Building Google Protobuf for Mac OS X / iOS.
echo Use 'tail -f build.log' to monitor progress.

(
#PREFIX=`pwd`/protobuf
PREFIX=/opt/protobuf-ios
mkdir ${PREFIX}
mkdir ${PREFIX}/platform

OSX_SDK=$(xcodebuild -showsdks \
    | grep macosx | sort | tail -n 1 | awk '{print substr($NF, 7)}'
    )

IOS_SDK=$(xcodebuild -showsdks \
    | grep iphoneos | sort | tail -n 1 | awk '{print substr($NF, 9)}'
    )

XCODEDIR=`xcode-select --print-path`

MACOSX_PLATFORM=${XCODEDIR}/Platforms/MacOSX.platform
MACOSX_SYSROOT=${MACOSX_PLATFORM}/Developer/MacOSX${OSX_SDK}.sdk

IPHONEOS_PLATFORM=${XCODEDIR}/Platforms/iPhoneOS.platform
IPHONEOS_SYSROOT=${IPHONEOS_PLATFORM}/Developer/SDKs/iPhoneOS${IOS_SDK}.sdk

IPHONESIMULATOR_PLATFORM=${XCODEDIR}/Platforms/iPhoneSimulator.platform
IPHONESIMULATOR_SYSROOT=${IPHONESIMULATOR_PLATFORM}/Developer/SDKs/iPhoneSimulator${IOS_SDK}.sdk

CC=clang
CFLAGS="-DNDEBUG -g -O0 -pipe -fPIC -fcxx-exceptions"
CXX=clang
CXXFLAGS="${CFLAGS} -std=c++11 -stdlib=libc++"
LDFLAGS="-stdlib=libc++"
LIBS="-lc++ -lc++abi"

####################################
# Cleanup any earlier build attempts
####################################

(
echo "------------------ Cleanup --------------------"
cd /tmp
if [ -d ${PREFIX} ]
then
rm -rf ${PREFIX}
fi
mkdir ${PREFIX}
mkdir ${PREFIX}/platform
)

##########################################
# Fetch Google Protobuf 2.5.0 from source.
##########################################

(
echo "------------------ Fetch protobuf --------------------"
cd /tmp
curl http://protobuf.googlecode.com/files/protobuf-2.5.0.tar.gz --output /tmp/protobuf-2.5.0.tar.gz

if [ -d /tmp/protobuf-2.5.0 ]
then
rm -rf /tmp/protobuf-2.5.0
fi
tar xvf /tmp/protobuf-2.5.0.tar.gz
)

###############################################################
# Replace "namespace google" with "namespace google_public"
# in all source/header files. This is to address a
# namespace collision issue when building for recent
# versions of iOS. Apple is using the protobuf library
# internally, and embeds it as a private framework.
###############################################################

(
echo "------------------ Fixup namespace --------------------"
cd /tmp/protobuf-2.5.0/src/google/protobuf
sed -i '' -e 's/namespace\ google /namespace\ google_public /g' $(find . -name \*.h -type f)
sed -i '' -e 's/namespace\ google /namespace\ google_public /g' $(find . -name \*.cc -type f)
sed -i '' -e 's/namespace\ google /namespace\ google_public /g' $(find . -name \*.proto -type f)
sed -i '' -e 's/google::protobuf/google_public::protobuf/g' $(find . -name \*.h -type f)
sed -i '' -e 's/google::protobuf/google_public::protobuf/g' $(find . -name \*.cc -type f)
sed -i '' -e 's/google::protobuf/google_public::protobuf/g' $(find . -name \*.proto -type f)
)

#####################
# x86_64 for Mac OS X
#####################

(
echo "------------------ Mac OS X --------------------"
cd /tmp/protobuf-2.5.0
make distclean
./configure --disable-shared --enable-static --prefix=${PREFIX} --exec-prefix=${PREFIX}/platform/x86_64 "CC=${CC}" "CFLAGS=${CFLAGS} -arch x86_64" "CXX=${CXX}" "CXXFLAGS=${CXXFLAGS} -arch x86_64" "LDFLAGS=${LDFLAGS}" "LIBS=${LIBS}"
make
make test
make install
cd python
python setup.py build
python setup.py install
)

###########################
# i386 for iPhone Simulator
###########################

(
echo "------------------ iPhone Simulator --------------------"
cd /tmp/protobuf-2.5.0
make distclean
./configure --build=x86_64-apple-darwin13.0.0 --host=i386-apple-darwin13.0.0 --with-protoc=${PREFIX}/platform/x86_64/bin/protoc --disable-shared --enable-static --prefix=${PREFIX} --exec-prefix=${PREFIX}/platform/i386 "CC=${CC}" "CFLAGS=${CFLAGS} -miphoneos-version-min=${IOS_SDK} -arch i386 -isysroot ${IPHONESIMULATOR_SYSROOT}" "CXX=${CXX}" "CXXFLAGS=${CXXFLAGS} -arch i386 -isysroot ${IPHONESIMULATOR_SYSROOT}" LDFLAGS="-arch i386 -miphoneos-version-min=${IOS_SDK} ${LDFLAGS}" "LIBS=${LIBS}"
make
make install
)

##################
# armv7 for iPhone
##################

(
echo "------------------ armv7 iPhone --------------------"
cd /tmp/protobuf-2.5.0
make distclean
./configure --build=x86_64-apple-darwin13.0.0 --host=armv7-apple-darwin13.0.0 --with-protoc=${PREFIX}/platform/x86_64/bin/protoc --disable-shared --enable-static --prefix=${PREFIX} --exec-prefix=${PREFIX}/platform/armv7 "CC=${CC}" "CFLAGS=${CFLAGS} -miphoneos-version-min=${IOS_SDK} -arch armv7 -isysroot ${IPHONEOS_SYSROOT}" "CXX=${CXX}" "CXXFLAGS=${CXXFLAGS} -arch armv7 -isysroot ${IPHONEOS_SYSROOT}" LDFLAGS="-arch armv7 -miphoneos-version-min=${IOS_SDK} ${LDFLAGS}" "LIBS=${LIBS}"
make
make install
)

###################
# armv7s for iPhone
###################

(
echo "------------------ armv7s iPhone --------------------"
cd /tmp/protobuf-2.5.0
make distclean
./configure --build=x86_64-apple-darwin13.0.0 --host=armv7s-apple-darwin13.0.0 --with-protoc=${PREFIX}/platform/x86_64/bin/protoc --disable-shared --enable-static --prefix=${PREFIX} --exec-prefix=${PREFIX}/platform/armv7s "CC=${CC}" "CFLAGS=${CFLAGS} -miphoneos-version-min=${IOS_SDK} -arch armv7s -isysroot ${IPHONEOS_SYSROOT}" "CXX=${CXX}" "CXXFLAGS=${CXXFLAGS} -arch armv7s -isysroot ${IPHONEOS_SYSROOT}" LDFLAGS="-arch armv7s -miphoneos-version-min=${IOS_SDK} ${LDFLAGS}" "LIBS=${LIBS}"
make
make install
)

########################################
# Patch Protobuf 2.5.0 for 64bit support
########################################

(
echo "------------------ Patching protobuf --------------------"
cd /tmp/protobuf-2.5.0
make distclean
curl https://gist.githubusercontent.com/BennettSmith/7111094/raw/171695f70b102de2301f5b45d9e9ab3167b4a0e8/0001-Add-generic-GCC-support-for-atomic-operations.patch --output /tmp/0001-Add-generic-GCC-support-for-atomic-operations.patch
curl https://gist.githubusercontent.com/BennettSmith/7111094/raw/a4e85ffc82af00ae7984020300db51a62110db48/0001-Add-generic-gcc-header-to-Makefile.am.patch --output /tmp/0001-Add-generic-gcc-header-to-Makefile.am.patch
patch -p1 < /tmp/0001-Add-generic-GCC-support-for-atomic-operations.patch
patch -p1 < /tmp/0001-Add-generic-gcc-header-to-Makefile.am.patch
rm /tmp/0001-Add-generic-GCC-support-for-atomic-operations.patch
rm /tmp/0001-Add-generic-gcc-header-to-Makefile.am.patch
)

##################
# arm64 for iPhone
##################

(
echo "------------------ arm64 iPhone --------------------"
cd /tmp/protobuf-2.5.0
./configure --build=x86_64-apple-darwin13.0.0 --host=arm --with-protoc=${PREFIX}/platform/x86_64/bin/protoc --disable-shared --enable-static --prefix=${PREFIX} --exec-prefix=${PREFIX}/platform/arm64 "CC=${CC}" "CFLAGS=${CFLAGS} -miphoneos-version-min=${IOS_SDK} -arch arm64 -isysroot ${IPHONEOS_SYSROOT}" "CXX=${CXX}" "CXXFLAGS=${CXXFLAGS} -arch arm64 -isysroot ${IPHONEOS_SYSROOT}" LDFLAGS="-arch arm64 -miphoneos-version-min=${IOS_SDK} ${LDFLAGS}" "LIBS=${LIBS}"
make
make install
)

############################
# Create Universal Libraries
############################

(
echo "------------------ Universal libs --------------------"
cd ${PREFIX}/platform
mkdir universal
lipo x86_64/lib/libprotobuf.a arm64/lib/libprotobuf.a armv7s/lib/libprotobuf.a armv7/lib/libprotobuf.a i386/lib/libprotobuf.a -create -output universal/libprotobuf.a
lipo x86_64/lib/libprotobuf-lite.a arm64/lib/libprotobuf-lite.a armv7s/lib/libprotobuf-lite.a armv7/lib/libprotobuf-lite.a i386/lib/libprotobuf-lite.a -create -output universal/libprotobuf-lite.a
)

########################
# Finalize the packaging
########################

(
echo "------------------ Packaging --------------------"
cd ${PREFIX}
mkdir bin
mkdir lib
cp -r platform/x86_64/bin/protoc bin
cp -r platform/x86_64/lib/* lib
cp -r platform/universal/* lib
rm -rf platform
)
) >build.log 2>&1
echo Done!

I created a new script for protobuf 2.6.1 and OSX Yosemite / iOS 8.1
https://gist.github.com/strahlex/847dc5f320a21f1a9977