8 files changed, 67 insertions, 115 deletions
diff --git a/cmake/Modules/FindGMP.cmake b/cmake/Modules/FindGMP.cmake
index 7b45f16c7..190b7c548 100644
--- a/cmake/Modules/FindGMP.cmake
+++ b/cmake/Modules/FindGMP.cmake
@@ -12,8 +12,6 @@ if(ENABLE_SYSTEM_GMP)
 	else()
 		message (STATUS "Detecting GMP from system failed.")
 	endif()
-else()
-	message (STATUS "Detecting GMP from system disabled! (ENABLE_SYSTEM_GMP=0)")
 endif()
 
 if(NOT USE_SYSTEM_GMP)
diff --git a/cmake/Modules/FindGettextLib.cmake b/cmake/Modules/FindGettextLib.cmake
index 529452a4a..b7681827c 100644
--- a/cmake/Modules/FindGettextLib.cmake
+++ b/cmake/Modules/FindGettextLib.cmake
@@ -42,15 +42,6 @@ if(WIN32)
 		NAMES ${GETTEXT_LIB_NAMES}
 		PATHS "${CUSTOM_GETTEXT_PATH}/lib"
 		DOC "GetText library")
-	find_file(GETTEXT_DLL
-		NAMES libintl.dll intl.dll libintl3.dll intl3.dll
-		PATHS "${CUSTOM_GETTEXT_PATH}/bin" "${CUSTOM_GETTEXT_PATH}/lib" 
-		DOC "gettext *intl*.dll")
-	find_file(GETTEXT_ICONV_DLL
-		NAMES libiconv2.dll
-		PATHS "${CUSTOM_GETTEXT_PATH}/bin" "${CUSTOM_GETTEXT_PATH}/lib"
-		DOC "gettext *iconv*.lib")
-	set(GETTEXT_REQUIRED_VARS ${GETTEXT_REQUIRED_VARS} GETTEXT_DLL GETTEXT_ICONV_DLL)
 endif(WIN32)
 
 
diff --git a/cmake/Modules/FindIrrlicht.cmake b/cmake/Modules/FindIrrlicht.cmake
deleted file mode 100644
index 6f361e829..000000000
--- a/cmake/Modules/FindIrrlicht.cmake
+++ /dev/null
@@ -1,77 +0,0 @@
-
-mark_as_advanced(IRRLICHT_LIBRARY IRRLICHT_INCLUDE_DIR IRRLICHT_DLL)
-set(IRRLICHT_SOURCE_DIR "" CACHE PATH "Path to irrlicht source directory (optional)")
-
-
-# Find include directory
-
-if(NOT IRRLICHT_SOURCE_DIR STREQUAL "")
-	set(IRRLICHT_SOURCE_DIR_INCLUDE
-		"${IRRLICHT_SOURCE_DIR}/include"
-	)
-
-	set(IRRLICHT_LIBRARY_NAMES libIrrlicht.a Irrlicht Irrlicht.lib)
-
-	if(WIN32)
-		if(MSVC)
-			set(IRRLICHT_SOURCE_DIR_LIBS "${IRRLICHT_SOURCE_DIR}/lib/Win32-visualstudio")
-			set(IRRLICHT_LIBRARY_NAMES Irrlicht.lib)
-		else()
-			set(IRRLICHT_SOURCE_DIR_LIBS "${IRRLICHT_SOURCE_DIR}/lib/Win32-gcc")
-			set(IRRLICHT_LIBRARY_NAMES libIrrlicht.a libIrrlicht.dll.a)
-		endif()
-	else()
-		set(IRRLICHT_SOURCE_DIR_LIBS "${IRRLICHT_SOURCE_DIR}/lib/Linux")
-		set(IRRLICHT_LIBRARY_NAMES libIrrlicht.a)
-	endif()
-
-	find_path(IRRLICHT_INCLUDE_DIR NAMES irrlicht.h
-		PATHS
-		${IRRLICHT_SOURCE_DIR_INCLUDE}
-		NO_DEFAULT_PATH
-	)
-
-	find_library(IRRLICHT_LIBRARY NAMES ${IRRLICHT_LIBRARY_NAMES}
-		PATHS
-		${IRRLICHT_SOURCE_DIR_LIBS}
-		NO_DEFAULT_PATH
-	)
-
-else()
-	find_path(IRRLICHT_INCLUDE_DIR NAMES irrlicht.h
-		PATHS
-		/usr/local/include/irrlicht
-		/usr/include/irrlicht
-		/system/develop/headers/irrlicht #Haiku
-		PATH_SUFFIXES "include/irrlicht"
-	)
-
-	find_library(IRRLICHT_LIBRARY NAMES libIrrlicht.so libIrrlicht.a Irrlicht
-		PATHS
-		/usr/local/lib
-		/usr/lib
-		/system/develop/lib # Haiku
-	)
-endif()
-
-
-# On Windows, find the DLL for installation
-if(WIN32)
-	# If VCPKG_APPLOCAL_DEPS is ON, dll's are automatically handled by VCPKG
-	if(NOT VCPKG_APPLOCAL_DEPS)
-		if(MSVC)
-			set(IRRLICHT_COMPILER "VisualStudio")
-		else()
-			set(IRRLICHT_COMPILER "gcc")
-		endif()
-		find_file(IRRLICHT_DLL NAMES Irrlicht.dll
-			PATHS
-			"${IRRLICHT_SOURCE_DIR}/bin/Win32-${IRRLICHT_COMPILER}"
-			DOC "Path of the Irrlicht dll (for installation)"
-		)
-	endif()
-endif(WIN32)
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(Irrlicht DEFAULT_MSG IRRLICHT_LIBRARY IRRLICHT_INCLUDE_DIR)
-
diff --git a/cmake/Modules/FindJson.cmake b/cmake/Modules/FindJson.cmake
index a5e9098f8..cce2d387f 100644
--- a/cmake/Modules/FindJson.cmake
+++ b/cmake/Modules/FindJson.cmake
@@ -1,26 +1,25 @@
-# Look for JSONCPP if asked to.
-# We use a bundled version by default because some distros ship versions of
-# JSONCPP that cause segfaults and other memory errors when we link with them.
-# See https://github.com/minetest/minetest/issues/1793
+# Look for JsonCpp, with fallback to bundeled version
 
 mark_as_advanced(JSON_LIBRARY JSON_INCLUDE_DIR)
-option(ENABLE_SYSTEM_JSONCPP "Enable using a system-wide JSONCPP.  May cause segfaults and other memory errors!" FALSE)
+option(ENABLE_SYSTEM_JSONCPP "Enable using a system-wide JsonCpp" TRUE)
+set(USE_SYSTEM_JSONCPP FALSE)
 
 if(ENABLE_SYSTEM_JSONCPP)
 	find_library(JSON_LIBRARY NAMES jsoncpp)
 	find_path(JSON_INCLUDE_DIR json/allocator.h PATH_SUFFIXES jsoncpp)
 
-	include(FindPackageHandleStandardArgs)
-	find_package_handle_standard_args(Json DEFAULT_MSG JSON_LIBRARY JSON_INCLUDE_DIR)
-
-	if(JSON_FOUND)
-		message(STATUS "Using system JSONCPP library.")
+	if(JSON_LIBRARY AND JSON_INCLUDE_DIR)
+		message(STATUS "Using JsonCpp provided by system.")
+		set(USE_SYSTEM_JSONCPP TRUE)
 	endif()
 endif()
 
-if(NOT JSON_FOUND)
-	message(STATUS "Using bundled JSONCPP library.")
+if(NOT USE_SYSTEM_JSONCPP)
+	message(STATUS "Using bundled JsonCpp library.")
 	set(JSON_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/lib/jsoncpp)
 	set(JSON_LIBRARY jsoncpp)
 	add_subdirectory(lib/jsoncpp)
 endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Json DEFAULT_MSG JSON_LIBRARY JSON_INCLUDE_DIR)
diff --git a/cmake/Modules/FindLuaJIT.cmake b/cmake/Modules/FindLuaJIT.cmake
index 97b0b7c64..217415d14 100644
--- a/cmake/Modules/FindLuaJIT.cmake
+++ b/cmake/Modules/FindLuaJIT.cmake
@@ -1,8 +1,8 @@
 # Locate LuaJIT library
 # This module defines
 #  LUAJIT_FOUND, if false, do not try to link to Lua
+#  LUA_LIBRARY, where to find the lua library
 #  LUA_INCLUDE_DIR, where to find lua.h
-#  LUA_VERSION_STRING, the version of Lua found (since CMake 2.8.8)
 #
 # This module is similar to FindLua51.cmake except that it finds LuaJit instead.
 
@@ -44,19 +44,10 @@ else()
 	)
 endif()
 
-
-IF(LUA_INCLUDE_DIR AND EXISTS "${LUA_INCLUDE_DIR}/luajit.h")
-	FILE(STRINGS "${LUA_INCLUDE_DIR}/luajit.h" lua_version_str REGEX "^#define[ \t]+LUA_RELEASE[ \t]+\"LuaJIT .+\"")
-
-	STRING(REGEX REPLACE "^#define[ \t]+LUA_RELEASE[ \t]+\"LuaJIT ([^\"]+)\".*" "\\1" LUA_VERSION_STRING "${lua_version_str}")
-	UNSET(lua_version_str)
-ENDIF()
-
 INCLUDE(FindPackageHandleStandardArgs)
 # handle the QUIETLY and REQUIRED arguments and set LUAJIT_FOUND to TRUE if
-# all listed variables are TRUE
+# all listed variables exist
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(LuaJIT
-	REQUIRED_VARS LUA_LIBRARY LUA_INCLUDE_DIR
-	VERSION_VAR LUA_VERSION_STRING)
+	REQUIRED_VARS LUA_LIBRARY LUA_INCLUDE_DIR)
 
-MARK_AS_ADVANCED(LUA_INCLUDE_DIR LUA_LIBRARY LUA_MATH_LIBRARY)
+MARK_AS_ADVANCED(LUA_INCLUDE_DIR LUA_LIBRARY)
diff --git a/cmake/Modules/FindOpenGLES2.cmake b/cmake/Modules/FindOpenGLES2.cmake
index a47126705..ce04191dd 100644
--- a/cmake/Modules/FindOpenGLES2.cmake
+++ b/cmake/Modules/FindOpenGLES2.cmake
@@ -42,7 +42,7 @@ else()
 	)
 
 	include(FindPackageHandleStandardArgs)
-	find_package_handle_standard_args(OPENGLES2 DEFAULT_MSG OPENGLES2_LIBRARY OPENGLES2_INCLUDE_DIR)
+	find_package_handle_standard_args(OpenGLES2 DEFAULT_MSG OPENGLES2_LIBRARY OPENGLES2_INCLUDE_DIR)
 
 	find_path(EGL_INCLUDE_DIR EGL/egl.h
 		PATHS /usr/openwin/share/include
@@ -59,7 +59,6 @@ else()
 			/usr/lib
 	)
 
-	include(FindPackageHandleStandardArgs)
 	find_package_handle_standard_args(EGL DEFAULT_MSG EGL_LIBRARY EGL_INCLUDE_DIR)
 endif()
 
diff --git a/cmake/Modules/FindZstd.cmake b/cmake/Modules/FindZstd.cmake
new file mode 100644
index 000000000..e28e1334b
--- /dev/null
+++ b/cmake/Modules/FindZstd.cmake
@@ -0,0 +1,25 @@
+mark_as_advanced(ZSTD_LIBRARY ZSTD_INCLUDE_DIR)
+
+find_path(ZSTD_INCLUDE_DIR NAMES zstd.h)
+
+find_library(ZSTD_LIBRARY NAMES zstd)
+
+if(ZSTD_INCLUDE_DIR AND ZSTD_LIBRARY)
+	# Check that the API we use exists
+	include(CheckSymbolExists)
+	unset(HAVE_ZSTD_INITCSTREAM CACHE)
+	set(CMAKE_REQUIRED_INCLUDES ${ZSTD_INCLUDE_DIR})
+	set(CMAKE_REQUIRED_LIBRARIES ${ZSTD_LIBRARY})
+	check_symbol_exists(ZSTD_initCStream zstd.h HAVE_ZSTD_INITCSTREAM)
+	unset(CMAKE_REQUIRED_INCLUDES)
+	unset(CMAKE_REQUIRED_LIBRARIES)
+
+	if(NOT HAVE_ZSTD_INITCSTREAM)
+		unset(ZSTD_INCLUDE_DIR CACHE)
+		unset(ZSTD_LIBRARY CACHE)
+	endif()
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Zstd DEFAULT_MSG ZSTD_LIBRARY ZSTD_INCLUDE_DIR)
+
diff --git a/cmake/Modules/MinetestFindIrrlichtHeaders.cmake b/cmake/Modules/MinetestFindIrrlichtHeaders.cmake
new file mode 100644
index 000000000..d33b296d0
--- /dev/null
+++ b/cmake/Modules/MinetestFindIrrlichtHeaders.cmake
@@ -0,0 +1,26 @@
+# Locate Irrlicht or IrrlichtMt headers on system.
+
+foreach(libname IN ITEMS IrrlichtMt Irrlicht)
+	string(TOLOWER "${libname}" libname2)
+
+	find_path(IRRLICHT_INCLUDE_DIR NAMES irrlicht.h
+		DOC "Path to the directory with IrrlichtMt includes"
+		PATHS
+		/usr/local/include/${libname2}
+		/usr/include/${libname2}
+		/system/develop/headers/${libname2} #Haiku
+		PATH_SUFFIXES "include/${libname2}"
+	)
+
+	if(IRRLICHT_INCLUDE_DIR)
+		break()
+	endif()
+endforeach()
+
+# Handholding for users
+if(IRRLICHT_INCLUDE_DIR AND (NOT IS_DIRECTORY "${IRRLICHT_INCLUDE_DIR}" OR
+	NOT EXISTS "${IRRLICHT_INCLUDE_DIR}/irrlicht.h"))
+	message(WARNING "IRRLICHT_INCLUDE_DIR was set to ${IRRLICHT_INCLUDE_DIR} "
+		"but irrlicht.h does not exist inside. The path will not be used.")
+	unset(IRRLICHT_INCLUDE_DIR CACHE)
+endif()