V1ru8 V1ru8 - 5 months ago 13
iOS Question

leptonica 1.69 crosscompile for iOS (armv7, armv7s and arm64)

I try to cross compile leptonica 1.69 for armv7, armv7s and arm64.

For simulator (i386, x86_64) I use these settings and it works fine:

export IOS_BASE_SDK="7.1"
export IOS_DEPLOY_TGT="6.1"
export TOOLCHAIN=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer

export SDKROOT=$DEVROOT/SDKs/iPhoneSimulator$IOS_BASE_SDK.sdk
export CFLAGS="-arch x86_64 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"

export CPP=$TOOLCHAIN/usr/bin/cpp
export CXX=$TOOLCHAIN/usr/bin/c++
export CXXCPP=$TOOLCHAIN/usr/bin/cpp
export CC=$TOOLCHAIN/usr/bin/cc
export LD=$TOOLCHAIN/usr/bin/ld
export AR=$TOOLCHAIN/usr/bin/ar
export AS=$TOOLCHAIN/usr/bin/as
export NM=$TOOLCHAIN/usr/bin/nm
export RANLIB=$TOOLCHAIN/usr/bin/ranlib
export LDFLAGS="-L$SDKROOT/usr/lib/"

export CPPFLAGS="-no-cpp-precomp -I$SDKROOT/usr/include/"
export CXXFLAGS=$CFLAGS


And then call configure

./configure --enable-shared=no --disable-programs --without-zlib --without-libpng --without-jpeg --without-giflib --without-libtiff --libdir=$PWD/lib/nodebug


Now to build it for arm I tried to use these settings: (adding -arch to CFLAGS and CPPFLAGS, setting the SDK root and adding --host=x86_64)

export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer
export SDKROOT=$DEVROOT/SDKs/iPhoneOS$IOS_BASE_SDK.sdk
export CFLAGS="-arch armv7 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"
export CPPFLAGS="-arch armv7 -no-cpp-precomp -I$SDKROOT/usr/include/"

./configure --host=x86_64 --enable-shared=no --disable-programs --without-zlib --without-libpng --without-jpeg --without-giflib --without-libtiff --libdir=$PWD/lib/nodebug


but somehow the cpp does not work. The config logs says the following:

configure:5841: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cpp -arch armv7 -no-cpp-precomp -I/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/usr/include/ conftest.c
clang: error: no input files


Anyone any ideas what's wrong? Or any idea how to debug this further?

Answer

It seems that something with my paths to the compiler, preprocessors etc was wrong. Using just the default ones in the path works. So removing the following part solved my issue:

export CPP=$TOOLCHAIN/usr/bin/cpp
export CXX=$TOOLCHAIN/usr/bin/c++
export CXXCPP=$TOOLCHAIN/usr/bin/cpp
export CC=$TOOLCHAIN/usr/bin/cc
export LD=$TOOLCHAIN/usr/bin/ld
export AR=$TOOLCHAIN/usr/bin/ar
export AS=$TOOLCHAIN/usr/bin/as
export NM=$TOOLCHAIN/usr/bin/nm
export RANLIB=$TOOLCHAIN/usr/bin/ranlib
export LDFLAGS="-L$SDKROOT/usr/lib/"
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