cmake: use FeatureSummary to display which features we end up using

CMakeLists.txt

@@ -28,6 +28,7 @@ INCLUDE(CheckStructHasMember)
 INCLUDE(AddCFlagIfSupported)
 INCLUDE(FindPkgConfig)
 INCLUDE(FindThreads)
+INCLUDE(FeatureSummary)
 
 # Build options
 #
@@ -334,3 +335,10 @@ ENDIF ()
 IF (BUILD_EXAMPLES)
 	ADD_SUBDIRECTORY(examples)
 ENDIF ()
+
+IF(CMAKE_VERSION VERSION_GREATER 3)
+	FEATURE_SUMMARY(WHAT ENABLED_FEATURES DISABLED_FEATURES)
+ELSE()
+	PRINT_ENABLED_FEATURES()
+	PRINT_DISABLED_FEATURES()
+ENDIF()

src/CMakeLists.txt

 IF(DEBUG_POOL)
 	SET(GIT_DEBUG_POOL 1)
 ENDIF()
+ADD_FEATURE_INFO(debugpool GIT_DEBUG_POOL "debug pool allocator")
 
 # Add the features.h file as a dummy. This is required for Xcode
 # to successfully build the libgit2 library when using only
@@ -50,6 +51,7 @@ ENDIF(IS_ABSOLUTE ${INCLUDE_INSTALL_DIR})
 IF (ENABLE_TRACE STREQUAL "ON")
 	SET(GIT_TRACE 1)
 ENDIF()
+ADD_FEATURE_INFO(tracing GIT_TRACE "tracing support")
 
 CHECK_SYMBOL_EXISTS(regcomp_l "regex.h;xlocale.h" HAVE_REGCOMP_L)
 IF (HAVE_REGCOMP_L)
@@ -93,6 +95,7 @@ IF(THREADSAFE)
 	LIST(APPEND LIBGIT2_LIBS ${CMAKE_THREAD_LIBS_INIT})
 	LIST(APPEND LIBGIT2_PC_LIBS ${CMAKE_THREAD_LIBS_INIT})
 ENDIF()
+ADD_FEATURE_INFO(threadsafe THREADSAFE "threadsafe support")
 
 IF (SECURITY_FOUND)
 	IF (SECURITY_HAS_SSLCREATECONTEXT)
@@ -150,21 +153,26 @@ ELSE ()
 		LIST(APPEND LIBGIT2_LIBS ${CURL_LIBRARIES})
 		LIST(APPEND LIBGIT2_PC_LIBS ${CURL_LDFLAGS})
 	ENDIF()
+	ADD_FEATURE_INFO(cURL GIT_CURL "cURL for HTTP proxy support")
 ENDIF()
 
 # Specify sha1 implementation
 IF (USE_SHA1DC)
+	ADD_FEATURE_INFO(SHA ON "using SHA1DC")
 	SET(GIT_SHA1_COLLISIONDETECT 1)
 	ADD_DEFINITIONS(-DSHA1DC_NO_STANDARD_INCLUDES=1)
 	ADD_DEFINITIONS(-DSHA1DC_CUSTOM_INCLUDE_SHA1_C=\"common.h\")
 	ADD_DEFINITIONS(-DSHA1DC_CUSTOM_INCLUDE_UBC_CHECK_C=\"common.h\")
 	FILE(GLOB SRC_SHA1 hash/hash_collisiondetect.c hash/sha1dc/*)
 ELSEIF (WIN32 AND NOT MINGW)
+	ADD_FEATURE_INFO(SHA ON "using SHA1_WIN32")
 	SET(GIT_SHA1_WIN32 1)
 	FILE(GLOB SRC_SHA1 hash/hash_win32.c)
 ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+	ADD_FEATURE_INFO(SHA ON "using CommonCrypto")
 	SET(GIT_SHA1_COMMON_CRYPTO 1)
 ELSEIF (OPENSSL_FOUND)
+	ADD_FEATURE_INFO(SHA ON "using OpenSSL")
 	SET(GIT_SHA1_OPENSSL 1)
 	IF (CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
 		LIST(APPEND LIBGIT2_PC_LIBS "-lssl")
@@ -172,6 +180,7 @@ ELSEIF (OPENSSL_FOUND)
 		SET(LIBGIT2_PC_REQUIRES "${LIBGIT2_PC_REQUIRES} openssl")
 	ENDIF ()
 ELSE()
+	ADD_FEATURE_INFO(SHA ON "using generic")
 	FILE(GLOB SRC_SHA1 hash/hash_generic.c)
 ENDIF()
 
@@ -189,11 +198,13 @@ IF (USE_EXT_HTTP_PARSER AND HTTP_PARSER_FOUND AND HTTP_PARSER_VERSION_MAJOR EQUA
 	LIST(APPEND LIBGIT2_INCLUDES ${HTTP_PARSER_INCLUDE_DIRS})
 	LIST(APPEND LIBGIT2_LIBS ${HTTP_PARSER_LIBRARIES})
 	LIST(APPEND LIBGIT2_PC_LIBS "-lhttp_parser")
+	ADD_FEATURE_INFO(http-parser ON "http-parser support")
 ELSE()
 	MESSAGE(STATUS "http-parser version 2 was not found or disabled; using bundled 3rd-party sources.")
 	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/http-parser" "${libgit2_BINARY_DIR}/deps/http-parser")
 	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/http-parser")
 	LIST(APPEND LIBGIT2_OBJECTS "$<TARGET_OBJECTS:http-parser>")
+	ADD_FEATURE_INFO(http-parser ON "http-parser support (bundled)")
 ENDIF()
 
 # Optional external dependency: zlib
@@ -207,11 +218,13 @@ IF (ZLIB_FOUND)
 	ELSE()
 		SET(LIBGIT2_PC_REQUIRES "${LIBGIT2_PC_REQUIRES} zlib")
 	ENDIF()
+	ADD_FEATURE_INFO(zlib ON "Zlib support")
 ELSE()
 	MESSAGE(STATUS "zlib was not found; using bundled 3rd-party sources." )
 	ADD_SUBDIRECTORY("${libgit2_SOURCE_DIR}/deps/zlib" "${libgit2_BINARY_DIR}/deps/zlib")
 	LIST(APPEND LIBGIT2_INCLUDES "${libgit2_SOURCE_DIR}/deps/zlib")
 	LIST(APPEND LIBGIT2_OBJECTS $<TARGET_OBJECTS:zlib>)
+	ADD_FEATURE_INFO(zlib ON "Zlib support (bundled)")
 ENDIF()
 
 # Optional external dependency: libssh2
@@ -233,6 +246,7 @@ IF (LIBSSH2_FOUND)
 ELSE()
 	MESSAGE(STATUS "LIBSSH2 not found. Set CMAKE_PREFIX_PATH if it is installed outside of the default search path.")
 ENDIF()
+ADD_FEATURE_INFO(SSH GIT_SSH "SSH transport support")
 
 # Optional external dependency: libgssapi
 IF (USE_GSSAPI)
@@ -242,6 +256,7 @@ IF (GSSAPI_FOUND)
 	SET(GIT_GSSAPI 1)
 	LIST(APPEND LIBGIT2_LIBS ${GSSAPI_LIBRARIES})
 ENDIF()
+ADD_FEATURE_INFO(SPNEGO GIT_GSSAPI "SPNEGO authentication support")
 
 # Optional external dependency: iconv
 IF (USE_ICONV)
@@ -253,6 +268,7 @@ IF (ICONV_FOUND)
 	LIST(APPEND LIBGIT2_LIBS ${ICONV_LIBRARIES})
 	LIST(APPEND LIBGIT2_PC_LIBS ${ICONV_LIBRARIES})
 ENDIF()
+ADD_FEATURE_INFO(iconv GIT_USE_ICONV "iconv encoding conversion support")
 
 IF (SECURITY_FOUND)
 	SET(GIT_SECURE_TRANSPORT 1)