CMake: print useful debug information on every build

That way we don't need to ask more questions regarding system where build failed.

CMakeLists.txt

@@ -68,6 +68,7 @@ set(PACKAGE_FILE_NAME "" CACHE STRING "Override for CPack package filename")
 set(CMAKE_MODULE_PATH ${CMAKE_HOME_DIRECTORY}/cmake_modules)
 # Contains custom functions and macros, but don't altering any options
 include(VCMIUtils)
+vcmi_print_important_variables()
 
 # Options to enable folders in CMake generated projects for Visual Studio, Xcode, etc
 # Very useful to put 3rd-party libraries such as Minizip, GoogleTest and FuzzyLite in their own folders
@@ -90,6 +91,7 @@ if(ENABLE_GITVERSION)
 	include(GetGitRevisionDescription)
 	get_git_head_revision(GIT_REFSPEC GIT_SHA1)
 	configure_file("${CMAKE_CURRENT_SOURCE_DIR}/Version.cpp.in" "${CMAKE_BINARY_DIR}/Version.cpp" @ONLY)
+	vcmi_print_git_commit_hash()
 else()
 	add_definitions(-DVCMI_NO_EXTRA_VERSION)
 endif(ENABLE_GITVERSION)

cmake_modules/VCMIUtils.cmake

@@ -63,14 +63,64 @@ endif(${CMAKE_GENERATOR} MATCHES "Xcode")
 
 # Can be called to see check cmake variables and environment variables
 # For "install" debugging just copy it here. There no easy way to include modules from source.
-function(vcmi_get_cmake_debug_info)
+function(vcmi_print_all_variables)
 
-		message(STATUS "Debug - Internal variables:")
+		message(STATUS "-- -- Start of all internal variables")
 		get_cmake_property(_variableNames VARIABLES)
 		foreach(_variableName ${_variableNames})
 				message(STATUS "${_variableName}=${${_variableName}}")
 		endforeach()
-		message(STATUS "Debug - Environment variables:")
+		message(STATUS "-- -- End of all internal variables")
+		message(STATUS "--")
+		message(STATUS "-- -- Start of all environment variables")
 		execute_process(COMMAND "${CMAKE_COMMAND}" "-E" "environment")
+		message(STATUS "-- -- End of all environment variables")
+
+endfunction()
+
+# Print CMake variables most important for debugging
+function(vcmi_print_important_variables)
+
+	message(STATUS "-- -- Start of VCMI build debug information")
+
+	message(STATUS "CMAKE_VERSION: " ${CMAKE_VERSION})
+	message(STATUS "CMAKE_BUILD_TYPE: " ${CMAKE_BUILD_TYPE})
+	message(STATUS "CMAKE_BINARY_DIR: " ${CMAKE_BINARY_DIR})
+	message(STATUS "CMAKE_SOURCE_DIR: " ${CMAKE_SOURCE_DIR})
+#	message(STATUS "PROJECT_BINARY_DIR: " ${PROJECT_BINARY_DIR})
+#	message(STATUS "PROJECT_SOURCE_DIR: " ${PROJECT_SOURCE_DIR})
+	message(STATUS "CMAKE_MODULE_PATH: " ${CMAKE_MODULE_PATH})
+	message(STATUS "CMAKE_COMMAND: " ${CMAKE_COMMAND})
+	message(STATUS "CMAKE_ROOT: " ${CMAKE_ROOT})
+#	message(STATUS "CMAKE_CURRENT_LIST_FILE and LINE: ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE}")
+#	message(STATUS "CMAKE_INCLUDE_PATH: " ${CMAKE_INCLUDE_PATH})
+#	message(STATUS "CMAKE_LIBRARY_PATH: " ${CMAKE_LIBRARY_PATH})
+
+	message(STATUS "UNIX: ${UNIX} - WIN32: ${WIN32} - APPLE: ${APPLE}")
+	message(STATUS "MINGW: ${MINGW} - CYGWIN: ${CYGWIN} - MSVC: ${MSVC}")
+	message(STATUS "CMAKE_CXX_COMPILER_ID: " ${CMAKE_CXX_COMPILER_ID})
+	message(STATUS "CMAKE_CXX_COMPILER_VERSION: " ${CMAKE_CXX_COMPILER_VERSION})
+	message(STATUS "CMAKE_C_COMPILER: " ${CMAKE_C_COMPILER})
+	message(STATUS "CMAKE_CXX_COMPILER: " ${CMAKE_CXX_COMPILER})
+#	message(STATUS "CMAKE_COMPILER_IS_GNUCC: " ${CMAKE_COMPILER_IS_GNUCC})
+#	message(STATUS "CMAKE_COMPILER_IS_GNUCXX: " ${CMAKE_COMPILER_IS_GNUCXX})
+#	message(STATUS "CMAKE_C_FLAGS: " ${CMAKE_C_FLAGS})
+#	message(STATUS "CMAKE_CXX_FLAGS: " ${CMAKE_CXX_FLAGS})
+
+	message(STATUS "CMAKE_SYSTEM: " ${CMAKE_SYSTEM})
+	message(STATUS "CMAKE_SYSTEM_NAME: " ${CMAKE_SYSTEM_NAME})
+	message(STATUS "CMAKE_SYSTEM_VERSION: " ${CMAKE_SYSTEM_VERSION})
+	message(STATUS "CMAKE_SYSTEM_PROCESSOR: " ${CMAKE_SYSTEM_PROCESSOR})
+
+	message(STATUS "-- -- End of VCMI build debug information")
+
+endfunction()
+
+# Print Git commit hash
+function(vcmi_print_git_commit_hash)
+
+	message(STATUS "-- -- Start of Git information")
+	message(STATUS "GIT_SHA1: " ${GIT_SHA1})
+	message(STATUS "-- -- End of Git information")
 
 endfunction()