foo.diff

diff --git a/lua-5.4.8/lauxlib.c b/lua-5.4.8/lauxlib.c
index 923105e..6df05d0 100644
--- a/lua-5.4.8/lauxlib.c
+++ b/lua-5.4.8/lauxlib.c
@@ -265,7 +265,7 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
 
 #if !defined(l_inspectstat)	/* { */
 
-#if defined(LUA_USE_POSIX)
+#if defined(LUA_USE_POSIX) && !defined(__wasi__)
 
 #include <sys/wait.h>
 
diff --git a/lua-5.4.8/liolib.c b/lua-5.4.8/liolib.c
index c5075f3..fa33d8e 100644
--- a/lua-5.4.8/liolib.c
+++ b/lua-5.4.8/liolib.c
@@ -94,7 +94,7 @@ static int l_checkmode (const char *mode) {
 
 #if !defined(l_getc)		/* { */
 
-#if defined(LUA_USE_POSIX)
+#if defined(LUA_USE_POSIX) && !defined(__wasi__)
 #define l_getc(f)		getc_unlocked(f)
 #define l_lockfile(f)		flockfile(f)
 #define l_unlockfile(f)		funlockfile(f)
@@ -281,14 +281,19 @@ static int io_open (lua_State *L) {
 /*
 ** function to close 'popen' files
 */
+#if !defined(__wasi__)
 static int io_pclose (lua_State *L) {
   LStream *p = tolstream(L);
   errno = 0;
   return luaL_execresult(L, l_pclose(L, p->f));
 }
+#endif
 
 
 static int io_popen (lua_State *L) {
+#if defined(__wasi__)
+  return luaL_error(L, "not supported on WASI");
+#else
   const char *filename = luaL_checkstring(L, 1);
   const char *mode = luaL_optstring(L, 2, "r");
   LStream *p = newprefile(L);
@@ -297,14 +302,19 @@ static int io_popen (lua_State *L) {
   p->f = l_popen(L, filename, mode);
   p->closef = &io_pclose;
   return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
+#endif
 }
 
 
 static int io_tmpfile (lua_State *L) {
+#if defined(__wasi__)
+  return luaL_error(L, "not supported on WASI");
+#else
   LStream *p = newfile(L);
   errno = 0;
   p->f = tmpfile();
   return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1;
+#endif
 }
 
 
diff --git a/lua-5.4.8/loslib.c b/lua-5.4.8/loslib.c
index ba80d72..aea53da 100644
--- a/lua-5.4.8/loslib.c
+++ b/lua-5.4.8/loslib.c
@@ -100,6 +100,7 @@
 ** ===================================================================
 */
 #if !defined(lua_tmpnam)	/* { */
+#if !defined(__wasi__)	  /* { */
 
 #if defined(LUA_USE_POSIX)	/* { */
 
@@ -123,6 +124,7 @@
 #define LUA_TMPNAMBUFSIZE	L_tmpnam
 #define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
 
+#endif				/* } */
 #endif				/* } */
 
 #endif				/* } */
@@ -130,7 +132,7 @@
 
 
 #if !defined(l_system)
-#if defined(LUA_USE_IOS)
+#if defined(LUA_USE_IOS) || defined(__wasi__)
 /* Despite claiming to be ISO C, iOS does not implement 'system'. */
 #define l_system(cmd) ((cmd) == NULL ? 0 : -1)
 #else
@@ -169,6 +171,9 @@ static int os_rename (lua_State *L) {
 
 
 static int os_tmpname (lua_State *L) {
+#if defined(__wasi__)
+  return luaL_error(L, "not supported on WASI");
+#else
   char buff[LUA_TMPNAMBUFSIZE];
   int err;
   lua_tmpnam(buff, err);
@@ -176,6 +181,7 @@ static int os_tmpname (lua_State *L) {
     return luaL_error(L, "unable to generate a unique filename");
   lua_pushstring(L, buff);
   return 1;
+#endif
 }
 
 
@@ -186,7 +192,11 @@ static int os_getenv (lua_State *L) {
 
 
 static int os_clock (lua_State *L) {
+#if defined(__wasi__)
+  lua_pushnumber(L, (lua_Number)-1);
+#else
   lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
+#endif
   return 1;
 }
 
@@ -415,7 +425,9 @@ static const luaL_Reg syslib[] = {
   {"rename",    os_rename},
   {"setlocale", os_setlocale},
   {"time",      os_time},
+#if !defined(__wasi__)
   {"tmpname",   os_tmpname},
+#endif
   {NULL, NULL}
 };
 
diff --git a/lua-5.4.8/ltablib.c b/lua-5.4.8/ltablib.c
index e6bc4d0..39d1b51 100644
--- a/lua-5.4.8/ltablib.c
+++ b/lua-5.4.8/ltablib.c
@@ -244,6 +244,9 @@ typedef unsigned int IdxT;
 ** is to copy them to an array of a known type and use the array values.
 */
 static unsigned int l_randomizePivot (void) {
+#if defined(__wasi__)
+  return ~0;
+#else
   clock_t c = clock();
   time_t t = time(NULL);
   unsigned int buff[sof(c) + sof(t)];
@@ -253,6 +256,7 @@ static unsigned int l_randomizePivot (void) {
   for (i = 0; i < sof(buff); i++)
     rnd += buff[i];
   return rnd;
+#endif
 }
 
 #endif					/* } */
diff --git a/src/lib.rs b/src/lib.rs
index 01c77ed..9d187e1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -130,6 +130,7 @@ impl Build {
             }
         }
 
+        let mut libs = vec![version.lib_name().to_string()];
         match target {
             _ if target.contains("linux") => {
                 config.define("LUA_USE_LINUX", None);
@@ -187,6 +188,16 @@ impl Build {
                 }
                 source_dir = cpp_source_dir
             }
+            _ if target.contains("wasi") => {
+                config.define("LUA_USE_POSIX", None);
+                config.flag("-mllvm").flag("-wasm-enable-eh");
+                config.flag("-mllvm").flag("-wasm-use-legacy-eh=false");
+                config.flag("-mllvm").flag("-wasm-enable-sjlj");
+                libs.push("setjmp".to_string());
+
+                config.define("_WASI_EMULATED_SIGNAL", None);
+                libs.push("wasi-emulated-signal".to_string());
+            }
             _ => Err(format!("don't know how to build Lua for {target}"))?,
         }
 
@@ -232,7 +243,7 @@ impl Build {
         Ok(Artifacts {
             include_dir,
             lib_dir,
-            libs: vec![version.lib_name().to_string()],
+            libs,
         })
     }
 }
@@ -280,7 +291,7 @@ impl Artifacts {
     pub fn print_cargo_metadata(&self) {
         println!("cargo:rustc-link-search=native={}", self.lib_dir.display());
         for lib in self.libs.iter() {
-            println!("cargo:rustc-link-lib=static={lib}");
+            println!("cargo:rustc-link-lib=static:-bundle={lib}");
         }
     }
 }