Cmake: LibSSH2 detection and use.

CMake/FindLibSSH2.cmake

+# - Try to find the libssh2 library
+# Once done this will define
+#
+# LIBSSH2_FOUND - system has the libssh2 library
+# LIBSSH2_INCLUDE_DIR - the libssh2 include directory
+# LIBSSH2_LIBRARY - the libssh2 library name
+
+if (LIBSSH2_INCLUDE_DIR AND LIBSSH2_LIBRARY)
+  set(LibSSH2_FIND_QUIETLY TRUE)
+endif (LIBSSH2_INCLUDE_DIR AND LIBSSH2_LIBRARY)
+
+FIND_PATH(LIBSSH2_INCLUDE_DIR libssh2.h
+)
+
+FIND_LIBRARY(LIBSSH2_LIBRARY NAMES ssh2
+)
+
+if(LIBSSH2_INCLUDE_DIR)
+  file(STRINGS "${LIBSSH2_INCLUDE_DIR}/libssh2.h" libssh2_version_str REGEX "^#define[\t ]+LIBSSH2_VERSION_NUM[\t ]+0x[0-9][0-9][0-9][0-9][0-9][0-9].*")
+
+  string(REGEX REPLACE "^.*LIBSSH2_VERSION_NUM[\t ]+0x([0-9][0-9]).*$" "\\1" LIBSSH2_VERSION_MAJOR "${libssh2_version_str}")
+  string(REGEX REPLACE "^.*LIBSSH2_VERSION_NUM[\t ]+0x[0-9][0-9]([0-9][0-9]).*$" "\\1" LIBSSH2_VERSION_MINOR  "${libssh2_version_str}")
+  string(REGEX REPLACE "^.*LIBSSH2_VERSION_NUM[\t ]+0x[0-9][0-9][0-9][0-9]([0-9][0-9]).*$" "\\1" LIBSSH2_VERSION_PATCH "${libssh2_version_str}")
+
+  string(REGEX REPLACE "^0(.+)" "\\1" LIBSSH2_VERSION_MAJOR "${LIBSSH2_VERSION_MAJOR}")
+  string(REGEX REPLACE "^0(.+)" "\\1" LIBSSH2_VERSION_MINOR "${LIBSSH2_VERSION_MINOR}")
+  string(REGEX REPLACE "^0(.+)" "\\1" LIBSSH2_VERSION_PATCH "${LIBSSH2_VERSION_PATCH}")
+
+  set(LIBSSH2_VERSION "${LIBSSH2_VERSION_MAJOR}.${LIBSSH2_VERSION_MINOR}.${LIBSSH2_VERSION_PATCH}")
+endif(LIBSSH2_INCLUDE_DIR)
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibSSH2 DEFAULT_MSG LIBSSH2_INCLUDE_DIR LIBSSH2_LIBRARY )
+
+MARK_AS_ADVANCED(LIBSSH2_INCLUDE_DIR LIBSSH2_LIBRARY LIBSSH2_VERSION_MAJOR LIBSSH2_VERSION_MINOR LIBSSH2_VERSION_PATCH LIBSSH2_VERSION)

CMakeLists.txt

@@ -289,11 +289,40 @@ if(CMAKE_USE_OPENSSL)
   endif(OPENSSL_FOUND)
 endif(CMAKE_USE_OPENSSL)
 
+#libSSH2
+option(CMAKE_USE_LIBSSH2 "Use libSSH2" ON)
+mark_as_advanced(CMAKE_USE_LIBSSH2)
+set(USE_LIBSSH2 OFF)
+set(HAVE_LIBSSH2 OFF)
+
+if(CMAKE_USE_LIBSSH2)
+  find_package(LibSSH2)
+  if(LIBSSH2_FOUND)
+    list(APPEND CURL_LIBS ${LIBSSH2_LIBRARY})
+    set(CMAKE_REQUIRED_LIBRARIES ${LIBSSH2_LIBRARY})
+    set(CMAKE_REQUIRED_INCLUDES "${LIBSSH2_INCLUDE_DIR}")
+    set(HAVE_LIBSSH2 ON)
+    set(USE_LIBSSH2 ON)
+
+    # find_package has already found the headers
+    set(CURL_INCLUDES ${CURL_INCLUDES} "${LIBSSH2_INCLUDE_DIR}/libssh2.h")
+    set(CURL_TEST_DEFINES "${CURL_TEST_DEFINES} -DHAVE_LIBSSH2_H")
+
+    # now check for specific libssh2 symbols as they were added in different versions
+    set(CMAKE_EXTRA_INCLUDE_FILES "libssh2.h")
+    check_function_exists(libssh2_version           HAVE_LIBSSH2_VERSION)
+    check_function_exists(libssh2_init              HAVE_LIBSSH2_INIT)
+    check_function_exists(libssh2_exit              HAVE_LIBSSH2_EXIT)
+    check_function_exists(libssh2_scp_send64        HAVE_LIBSSH2_SCP_SEND64)
+    check_function_exists(libssh2_session_handshake HAVE_LIBSSH2_SESSION_HANDSHAKE)
+    set(CMAKE_EXTRA_INCLUDE_FILES "")
+
+  endif(LIBSSH2_FOUND)
+endif(CMAKE_USE_LIBSSH2)
+
 # If we have features.h, then do the _BSD_SOURCE magic
 check_include_file("features.h"       HAVE_FEATURES_H)
 
-
-
 # Check for header files
 if(NOT UNIX)
   check_include_file_concat("ws2tcpip.h"     HAVE_WS2TCPIP_H)
@@ -337,7 +366,6 @@ check_include_file_concat("ifaddrs.h"        HAVE_IFADDRS_H)
 check_include_file_concat("io.h"             HAVE_IO_H)
 check_include_file_concat("krb.h"            HAVE_KRB_H)
 check_include_file_concat("libgen.h"         HAVE_LIBGEN_H)
-check_include_file_concat("libssh2.h"        HAVE_LIBSSH2_H)
 check_include_file_concat("limits.h"         HAVE_LIMITS_H)
 check_include_file_concat("locale.h"         HAVE_LOCALE_H)
 check_include_file_concat("net/if.h"         HAVE_NET_IF_H)
@@ -779,6 +807,10 @@ function(SETUP_CURL_DEPENDENCIES TARGET_NAME)
     #ADD_DEFINITIONS( -DUSE_SSLEAY )
   endif()
 
+  if(CMAKE_USE_LIBSSH2 AND LIBSSH2_FOUND)
+    include_directories(${LIBSSH2_INCLUDE_DIR})
+  endif()
+
   target_link_libraries(${TARGET_NAME} ${CURL_LIBS})
 endfunction()
 

lib/curl_config.h.cmake

@@ -356,6 +356,21 @@
 /* Define to 1 if you have the `ssh2' library (-lssh2). */
 #cmakedefine HAVE_LIBSSH2 1
 
+/* Define to 1 if libssh2 provides `libssh2_version'. */
+#cmakedefine HAVE_LIBSSH2_VERSION 1
+
+/* Define to 1 if libssh2 provides `libssh2_init'. */
+#cmakedefine HAVE_LIBSSH2_INIT 1
+
+/* Define to 1 if libssh2 provides `libssh2_exit'. */
+#cmakedefine HAVE_LIBSSH2_EXIT 1
+
+/* Define to 1 if libssh2 provides `libssh2_scp_send64'. */
+#cmakedefine HAVE_LIBSSH2_SCP_SEND64 1
+
+/* Define to 1 if libssh2 provides `libssh2_session_handshake'. */
+#cmakedefine HAVE_LIBSSH2_SESSION_HANDSHAKE 1
+
 /* Define to 1 if you have the <libssh2.h> header file. */
 #cmakedefine HAVE_LIBSSH2_H 1