luajit: update Makefile to build from git

LuaJIT has a "rolling release" where we should follow git HEAD[1].
I believe that the currently tagged version is tracking code from
2017.  This PR updates the Makefile to latest HEAD.

Closes openwrt#25299

1. https://luajit.org/download.html

Build system: x86/64
Build-tested: x86/64/AMD Cezanne
Run-tested: x86/64/AMD Cezanne

Signed-off-by: John Audia <[email protected]>

lang/luajit/Makefile

@@ -1,14 +1,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luajit
-PKG_VERSION:=2.1.0
-PKG_REAL_VERSION:=$(PKG_VERSION)-beta3
-PKG_RELEASE:=8
+PKG_SOURCE_DATE:=2024-11-13
+PKG_VERSION:=2.1.$(subst -,,$(PKG_SOURCE_DATE))
+PKG_RELEASE:=1
 
-PKG_SOURCE:=LuaJIT-$(PKG_REAL_VERSION).tar.gz
-PKG_SOURCE_URL:=https://luajit.org/download
-PKG_HASH:=1ad2e34b111c802f9d0cdf019e986909123237a28c746b21295b63c9e785d9c3
-PKG_BUILD_DIR:=$(BUILD_DIR)/LuaJIT-$(PKG_REAL_VERSION)
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/LuaJIT/LuaJIT.git
+PKG_SOURCE_VERSION:=69bbf3c1b01de8239444b0c430a89fa868978fea
+PKG_MIRROR_HASH:=617aafabe07715e80019f0dc3b9bc28c77e95f5c390d2015ef386c4c58da17a0
 
 PKG_MAINTAINER:=Morteza Milani <[email protected]>
 PKG_LICENSE:=MIT
@@ -70,14 +70,12 @@ define Build/InstallDev
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/*so* $(1)/usr/lib/
 	$(INSTALL_DIR) $(1)/usr/lib/pkgconfig
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/luajit.pc $(1)/usr/lib/pkgconfig/
-	$(CP) $(PKG_INSTALL_DIR)/usr/bin/luajit-$(PKG_REAL_VERSION) $(PKG_INSTALL_DIR)/usr/bin/$(PKG_NAME)
 endef
 
 define Package/luajit/install
 	$(INSTALL_DIR) $(1)/usr/lib/
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/*.so* $(1)/usr/lib/
 	$(INSTALL_DIR) $(1)/usr/bin
-	$(CP) $(PKG_INSTALL_DIR)/usr/bin/luajit-$(PKG_REAL_VERSION) $(1)/usr/bin/$(PKG_NAME)
 endef
 
 define Host/Compile

lang/luajit/patches/010-lua-path.patch

@@ -8,6 +8,6 @@
 -#define LUA_LUADIR	"/lua/5.1/"
 +#define LUA_LROOT	"/usr"
 +#define LUA_LUADIR	"/lua/"
- #define LUA_LJDIR	"/luajit-2.1.0-beta3/"
 
  #ifdef LUA_ROOT
+ #define LUA_JROOT	LUA_ROOT

lang/luajit/patches/060-ppc-musl.patch → lang/luajit/patches/020-pcc-musl.patch

@@ -30,7 +30,7 @@ Subject: [PATCH] Have powerpc use fake GOT like MIPS
  /* Initialize instruction dispatch table and hot counters. */
  void lj_dispatch_init(GG_State *GG)
  {
-@@ -77,6 +89,9 @@ void lj_dispatch_init(GG_State *GG)
+@@ -79,6 +91,9 @@ void lj_dispatch_init(GG_State *GG)
  #if LJ_TARGET_MIPS
    memcpy(GG->got, dispatch_got, LJ_GOT__MAX*sizeof(ASMFunction *));
  #endif
@@ -76,18 +76,19 @@ Subject: [PATCH] Have powerpc use fake GOT like MIPS
  /* Type of hot counter. Must match the code in the assembler VM. */
  /* 16 bits are sufficient. Only 0.0015% overhead with maximum slot penalty. */
  typedef uint16_t HotCount;
-@@ -89,7 +116,7 @@ typedef uint16_t HotCount;
- typedef struct GG_State {
-   lua_State L;				/* Main thread. */
-   global_State g;			/* Global state. */
--#if LJ_TARGET_MIPS
-+#if LJ_TARGET_MIPS || LJ_TARGET_PPC
+@@ -96,6 +123,9 @@ typedef struct GG_State {
+ #if LJ_TARGET_MIPS
    ASMFunction got[LJ_GOT__MAX];		/* Global offset table. */
  #endif
++#if LJ_TARGET_PPC
++  memcpy(GG->got, dispatch_got, LJ_GOT__MAX*4);
++#endif
  #if LJ_HASJIT
+   jit_State J;				/* JIT state. */
+   HotCount hotcount[HOTCOUNT_SIZE];	/* Hot counters. */
 --- a/src/vm_ppc.dasc
 +++ b/src/vm_ppc.dasc
-@@ -59,7 +59,12 @@
+@@ -58,7 +58,12 @@
  |.define ENV_OFS,	8
  |.endif
  |.else  // No TOC.
@@ -101,7 +102,7 @@ Subject: [PATCH] Have powerpc use fake GOT like MIPS
  |.macro .toc, a, b; .endmacro
  |.endif
  |.macro .tocenv, a, b; .if TOCENV; a, b; .endif; .endmacro
-@@ -482,6 +487,8 @@
+@@ -481,6 +486,8 @@
  |// Assumes DISPATCH is relative to GL.
  #define DISPATCH_GL(field)	(GG_DISP2G + (int)offsetof(global_State, field))
  #define DISPATCH_J(field)	(GG_DISP2J + (int)offsetof(jit_State, field))