Quote LIBSSH2_LIBRARIES call Credits to @directhex It is possible for PKG_CHECK_MODULES(LIBSSH2 libssh2) to LIBSSH2_LIBRARIES to a string with more than one library in it - e.g. if your libssh2 was built against libgcrypt, it will be "ssh2;gcrypt" Quoting the string is needed, or CHECK_LIBRARY_EXISTS will fail.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3c7a15..cecccb3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -271,7 +271,7 @@ IF (LIBSSH2_FOUND)
SET(LIBGIT2_PC_REQUIRES "${LIBGIT2_PC_REQUIRES} libssh2")
SET(SSH_LIBRARIES ${LIBSSH2_LIBRARIES})
- CHECK_LIBRARY_EXISTS(${LIBSSH2_LIBRARIES} libssh2_userauth_publickey_frommemory "" HAVE_LIBSSH2_MEMORY_CREDENTIALS)
+ CHECK_LIBRARY_EXISTS("${LIBSSH2_LIBRARIES}" libssh2_userauth_publickey_frommemory "" HAVE_LIBSSH2_MEMORY_CREDENTIALS)
IF (HAVE_LIBSSH2_MEMORY_CREDENTIALS)
ADD_DEFINITIONS(-DGIT_SSH_MEMORY_CREDENTIALS)
ENDIF()