I'm try to build linphone-iphone app, but there are problems with linphone-iphone-SDK building.
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:39:28: error: openssl/crypto.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:40:25: error: openssl/bio.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:41:24: error: openssl/bn.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:42:26: error: openssl/rand.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:43:25: error: openssl/err.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:44:24: error: openssl/dh.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:45:25: error: openssl/evp.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:46:24: error: openssl/ec.h: No such file or directory
/Volumes/Data/projects/linphone-iphone/submodules/externals/zrtpcpp/src/libzrtpcpp/crypto/openssl/ZrtpDH.cpp:47:26: error: openssl/ecdh.h: No such file or directory