From 4db2b83833fa31bb90522af7b0e92414f5c5140a Mon Sep 17 00:00:00 2001
From: Ryan Liptak <squeek502@hotmail.com>
Date: Fri, 29 Oct 2021 17:45:18 -0700
Subject: [PATCH 1/3] Bump luajit to latest HEAD of v2.1 branch

---
 deps/luajit | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/deps/luajit b/deps/luajit
index 1d8b747c..b4b2dce9 160000
--- a/deps/luajit
+++ b/deps/luajit
@@ -1 +1 @@
-Subproject commit 1d8b747c161db457e032a023ebbff511f5de5ec2
+Subproject commit b4b2dce9fc3ffaaaede39b36d06415311e2aa516

From 8a1d9d61ce0502cc74d3ed011c281005c6963343 Mon Sep 17 00:00:00 2001
From: Ryan Liptak <squeek502@hotmail.com>
Date: Fri, 29 Oct 2021 20:41:18 -0700
Subject: [PATCH 2/3] luajit.cmake: Add lib_buffer.c

---
 deps/luajit.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/deps/luajit.cmake b/deps/luajit.cmake
index 169d7cb1..f1e18fc9 100644
--- a/deps/luajit.cmake
+++ b/deps/luajit.cmake
@@ -238,6 +238,7 @@ SET(SRC_LJLIB
   ${LUAJIT_DIR}/src/lib_debug.c
   ${LUAJIT_DIR}/src/lib_jit.c
   ${LUAJIT_DIR}/src/lib_ffi.c
+  ${LUAJIT_DIR}/src/lib_buffer.c
 )
 
 SET(SRC_LIBAUX

From 13d034b395854edd174bebcde20d209856590f33 Mon Sep 17 00:00:00 2001
From: Ryan Liptak <squeek502@hotmail.com>
Date: Fri, 29 Oct 2021 20:41:52 -0700
Subject: [PATCH 3/3] luajit.cmake: Attempt to port LUAJIT_UNWIND_EXTERNAL
 logic from luajit's src/Makefile

---
 deps/luajit.cmake | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/deps/luajit.cmake b/deps/luajit.cmake
index f1e18fc9..189aabd4 100644
--- a/deps/luajit.cmake
+++ b/deps/luajit.cmake
@@ -73,7 +73,6 @@ ENDIF()
 if ( WIN32 AND NOT CYGWIN )
   set ( LJVM_MODE peobj )
 elseif ( APPLE )
-  set ( CMAKE_EXE_LINKER_FLAGS "-pagezero_size 10000 -image_base 100000000 ${CMAKE_EXE_LINKER_FLAGS}" )
   set ( LJVM_MODE machasm )
 else ()
   set ( LJVM_MODE elfasm )
@@ -213,6 +212,39 @@ IF(TARGET_LJARCH STREQUAL "ppc")
   ENDIF()
 ENDIF()
 
+IF(APPLE)
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DLUAJIT_UNWIND_EXTERNAL")
+ELSEIF(NOT WIN32)
+  IF(NOT LJ_NO_UNWIND_1)
+    # Find out whether the target toolchain always generates unwind tables.
+    MESSAGE(STATUS "Checking if the toolchain always generates unwind tables")
+    SET(TOOLCHAIN_GENERATES_UNWIND_TABLES 0)
+    SET(TMPUNWIND_DIR "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp")
+    file(WRITE "${TMPUNWIND_DIR}/tmpunwind.c" "extern void b(void);int a(void){b();return 0;}")
+    # This seems flimsy; it would be better to use something like CMake's try_compile but
+    # there doesn't seem to be a way to avoid linking when using try_compile so this particular
+    # code can't use it (at least without modifying the test code)
+    execute_process(COMMAND "${CMAKE_C_COMPILER}" -c -x c "${TMPUNWIND_DIR}/tmpunwind.c" -o "${TMPUNWIND_DIR}/tmpunwind.o"
+      RESULT_VARIABLE UNWIND_TEST_ERRORED)
+    IF(NOT UNWIND_TEST_ERRORED)
+      file(READ "${TMPUNWIND_DIR}/tmpunwind.o" TMPUNWIND_O)
+      string(FIND "${TMPUNWIND_O}" "eh_frame" EH_FRAME_FOUND)
+      string(FIND "${TMPUNWIND_O}" "__unwind_info" UNWIND_INFO_FOUND)
+      IF(EH_FRAME_FOUND OR UNWIND_INFO_FOUND)
+        SET(TOOLCHAIN_GENERATES_UNWIND_TABLES 1)
+      ENDIF()
+    ENDIF()
+
+    IF(TOOLCHAIN_GENERATES_UNWIND_TABLES)
+      SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DLUAJIT_UNWIND_EXTERNAL")
+      MESSAGE(STATUS "Toolchain does generate unwind tables")
+    ELSE()
+      MESSAGE(STATUS "Toolchain does not generate unwind tables")
+    ENDIF()
+  ENDIF()
+ENDIF()
+
+
 add_executable(minilua ${LUAJIT_DIR}/src/host/minilua.c)
 SET_TARGET_PROPERTIES(minilua PROPERTIES COMPILE_DEFINITIONS "${TARGET_ARCH}")
 CHECK_LIBRARY_EXISTS(m sin "" MINILUA_USE_LIBM)