1. Get the source Get libssh2 from www.libssh2.org (I got libssh2-1.1.tar.gz) Get gnupgp from http://www.gnupg.org/ ( I got gnupg-1.4.9) Get libgcrypt from http://www.gnupg.org (I got libgcrypt-1.4.4) Get libpgp-error from http://www.gnupg.org (I got libgpg-error-1.7) ZLib is provided by Apple in the SDK. If you still want to build it from the source (zlib-1.2.3), your environement should be export DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer export SDKROOT=$DEVROOT/SDKs/iPhoneOS3.0.sdk export CC=$DEVROOT/usr/bin/gcc export LD=$DEVROOT/usr/bin/ld export CPP=$DEVROOT/usr/bin/cpp export CXX=$DEVROOT/usr/bin/g++ unset AR unset AS export NM=$DEVROOT/usr/bin/nm export CXXCPP=$DEVROOT/usr/bin/cpp export RANLIB=$DEVROOT/usr/bin/ranlib export LDFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -L/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os/lib" export CFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -I/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os/include" export CXXFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -I/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os/include/" and the configure : ./configure --prefix=/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os 2. Extract sources 3. Build gnupgp My compile_environ file: export DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer export SDKROOT=$DEVROOT/SDKs/iPhoneOS3.0.sdk export CC=$DEVROOT/usr/bin/gcc export LD=$DEVROOT/usr/bin/ld export CPP=$DEVROOT/usr/bin/cpp export CXX=$DEVROOT/usr/bin/g++ export AR=$DEVROOT/usr/bin/ar export AS=$DEVROOT/usr/bin/as export NM=$DEVROOT/usr/bin/nm export CXXCPP=$DEVROOT/usr/bin/cpp export RANLIB=$DEVROOT/usr/bin/ranlib export LDFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -L/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os/lib" export CFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -I/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os/include" export CXXFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -I/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os" (Refer to ZBar to understand compile_environ) Then the configure: ./configure --host=arm-apple-darwin9 --prefix=/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os Make and make install 4. Build libgpg-error Use the same compile_environ Then the configure: ./configure --host=arm-apple-darwin9 --prefix=/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os --enable-shared=no Then make and make install 5. Build libgcrypt Use the same compile_environ Then the configure: ./configure --host=arm-apple-darwin9 --prefix=/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os --enable-shared=no --with-gpg-error-prefix=/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os Then make and make install 6. Build libssh2 Use the same compile_environ Configure: ./configure --host=arm-apple-darwin9 --prefix=/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os --with-libgcrypt-prefix=/Users/olivier/Documents/IphoneDevProjects/3rdParty/iphone-os 7. Use it in your iphone application I did not use it in one of my application but I think you will need to include the following as framework:
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