1 files changed, 85 insertions, 23 deletions
diff --git a/third-party/cmake/BuildLuajit.cmake b/third-party/cmake/BuildLuajit.cmake
index 39207eb8b8..33753fd350 100644
--- a/third-party/cmake/BuildLuajit.cmake
+++ b/third-party/cmake/BuildLuajit.cmake
@@ -1,25 +1,87 @@
-ExternalProject_Add(luajit
-  PREFIX ${DEPS_BUILD_DIR}
-  URL ${LUAJIT_URL}
-  DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/luajit
-  DOWNLOAD_COMMAND ${CMAKE_COMMAND}
-    -DPREFIX=${DEPS_BUILD_DIR}
-    -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/luajit
-    -DURL=${LUAJIT_URL}
-    -DEXPECTED_SHA256=${LUAJIT_SHA256}
-    -DTARGET=luajit
-    -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
-  CONFIGURE_COMMAND ""
-  BUILD_IN_SOURCE 1
-  BUILD_COMMAND ""
-  INSTALL_COMMAND ${MAKE_PRG} CC=${DEPS_C_COMPILER}
-                              PREFIX=${DEPS_INSTALL_DIR}
-                              CFLAGS=-fPIC
-                              CFLAGS+=-DLUAJIT_DISABLE_JIT
-                              CFLAGS+=-DLUA_USE_APICHECK
-                              CFLAGS+=-DLUA_USE_ASSERT
-                              CCDEBUG+=-g
-                              BUILDMODE=static
-                              install)
+include(CMakeParseArguments)
+
+# BuildLuajit(TARGET targetname CONFIGURE_COMMAND ... BUILD_COMMAND ... INSTALL_COMMAND ...)
+# Reusable function to build luajit, wraps ExternalProject_Add.
+# Failing to pass a command argument will result in no command being run
+function(BuildLuajit)
+  cmake_parse_arguments(_luajit
+    ""
+    "TARGET"
+    "CONFIGURE_COMMAND;BUILD_COMMAND;INSTALL_COMMAND"
+    ${ARGN})
+  if(NOT _luajit_CONFIGURE_COMMAND AND NOT _luajit_BUILD_COMMAND
+        AND NOT _luajit_INSTALL_COMMAND)
+    message(FATAL_ERROR "Must pass at least one of CONFIGURE_COMMAND, BUILD_COMMAND, INSTALL_COMMAND")
+  endif()
+  if(NOT _luajit_TARGET)
+    set(_luajit_TARGET "luajit")
+  endif()
+
+  ExternalProject_Add(${_luajit_TARGET}
+    PREFIX ${DEPS_BUILD_DIR}
+    URL ${LUAJIT_URL}
+    DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/luajit
+    DOWNLOAD_COMMAND ${CMAKE_COMMAND}
+      -DPREFIX=${DEPS_BUILD_DIR}
+      -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/luajit
+      -DURL=${LUAJIT_URL}
+      -DEXPECTED_SHA256=${LUAJIT_SHA256}
+      -DTARGET=${_luajit_TARGET}
+      -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
+    CONFIGURE_COMMAND "${_luajit_CONFIGURE_COMMAND}"
+    BUILD_IN_SOURCE 1
+    BUILD_COMMAND "${_luajit_BUILD_COMMAND}"
+    INSTALL_COMMAND "${_luajit_INSTALL_COMMAND}")
+endfunction()
+
+set(INSTALLCMD_UNIX ${MAKE_PRG} CFLAGS=-fPIC
+                                CFLAGS+=-DLUAJIT_DISABLE_JIT
+                                CFLAGS+=-DLUA_USE_APICHECK
+                                CFLAGS+=-DLUA_USE_ASSERT
+                                CCDEBUG+=-g
+                                BUILDMODE=static
+                                install)
+
+if(UNIX)
+  BuildLuaJit(INSTALL_COMMAND ${INSTALLCMD_UNIX}
+    CC=${DEPS_C_COMPILER} PREFIX=${DEPS_INSTALL_DIR})
+
+elseif(MINGW AND CMAKE_CROSSCOMPILING)
+
+  # Build luajit for the host
+  BuildLuaJit(TARGET luajit_host
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ${INSTALLCMD_UNIX}
+      CC=${HOST_C_COMPILER} PREFIX=${HOSTDEPS_INSTALL_DIR})
+
+  # Build luajit for the target
+  BuildLuaJit(
+    # Similar to Unix + cross - fPIC
+    INSTALL_COMMAND
+      ${MAKE_PRG} PREFIX=${DEPS_INSTALL_DIR}
+        BUILDMODE=static install
+        TARGET_SYS=${CMAKE_SYSTEM_NAME}
+        CROSS=${CROSS_TARGET}-
+        HOST_CC=${HOST_C_COMPILER} HOST_CFLAGS=${HOST_C_FLAGS}
+        HOST_LDFLAGS=${HOST_EXE_LINKER_FLAGS}
+        FILE_T=luajit.exe
+        INSTALL_TSYMNAME=luajit.exe)
+
+elseif(WIN32 AND MSVC)
+
+  BuildLuaJit(
+    BUILD_COMMAND ${CMAKE_COMMAND} -E chdir ${DEPS_BUILD_DIR}/src/luajit/src ${DEPS_BUILD_DIR}/src/luajit/src/msvcbuild.bat static
+    INSTALL_COMMAND ${CMAKE_COMMAND} -E make_directory ${DEPS_INSTALL_DIR}/bin
+      COMMAND ${CMAKE_COMMAND} -E copy ${DEPS_BUILD_DIR}/src/luajit/src/luajit.exe ${DEPS_INSTALL_DIR}/bin
+      COMMAND ${CMAKE_COMMAND} -E copy ${DEPS_BUILD_DIR}/src/luajit/src/lua51.lib ${DEPS_INSTALL_DIR}/bin
+      COMMAND ${CMAKE_COMMAND} -E make_directory ${DEPS_INSTALL_DIR}/lib
+      COMMAND ${CMAKE_COMMAND} -E copy ${DEPS_BUILD_DIR}/src/luajit/src/lua51.lib ${DEPS_INSTALL_DIR}/lib
+      COMMAND ${CMAKE_COMMAND} -E make_directory ${DEPS_INSTALL_DIR}/include/luajit-2.0
+      COMMAND ${CMAKE_COMMAND} -DFROM_GLOB=${DEPS_BUILD_DIR}/src/luajit/src/*.h -DTO=${DEPS_INSTALL_DIR}/include/luajit-2.0 -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/CopyFilesGlob.cmake)
+
+else()
+  message(FATAL_ERROR "Trying to build luajit in an unsupported system ${CMAKE_SYSTEM_NAME}/${CMAKE_C_COMPILER_ID}")
+endif()
 
 list(APPEND THIRD_PARTY_DEPS luajit)