panda3d · pmp-p · Dec 21, 2024
diff --git a/dtool/CompilerFlags.cmake b/dtool/CompilerFlags.cmake
@@ -240,3 +240,18 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     add_compile_options("-fno-semantic-interposition")
   endif()
 endif()
+
+
+
+
+if(WASI)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_WASI_EMULATED_MMAN -D_WASI_EMULATED_PROCESS_CLOCKS")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -lwasi-emulated-mman -lwasi-emulated-process-clocks -lwasi-emulated-getpid")
+    set(cxx_exceptions_off)
+    set(cxx_rtti_off)
+endif()
+
+
+
+
+
diff --git a/dtool/src/dtoolutil/filename.cxx b/dtool/src/dtoolutil/filename.cxx
@@ -22,6 +22,11 @@
 #include <sys/stat.h>
 #include <algorithm>
 
+// lockf and tempnam
+#if defined(__wasi__)
+#include "wasi.c"
+#endif // __wasi__
+
 #ifdef PHAVE_UTIME_H
 #include <utime.h>
 #endif

diff --git a/dtool/src/dtoolutil/wasi.c b/dtool/src/dtoolutil/wasi.c
@@ -0,0 +1,98 @@
+#pragma once
+
+extern "C" {
+
+#define PHAVE_LOCKF
+
+static int
+lockf(int fd, int cmd, off_t len) {
+    return 0;
+}
+
+#define P_tmpdir "/tmp"
+#define LOCK_EX 2
+#define LOCK_NB 4
+
+static FILE *
+popen(const char *command, const char *type){
+    return NULL;
+}
+static char *
+__randname(char *tmpl)
+{
+    int i;
+    struct timespec ts;
+    unsigned long r;
+
+    clock_gettime(CLOCK_REALTIME, &ts);
+    r = ts.tv_nsec*65537 ^ (uintptr_t)&ts / 16 + (uintptr_t)tmpl;
+    for (i=0; i<6; i++, r>>=5)
+        tmpl[i] = 'A'+(r&15)+(r&16)*2;
+
+    return tmpl;
+}
+
+static char *
+mktemp(char *tmpl)
+{
+    size_t l = strlen(tmpl);
+    int retries = 100;
+    struct stat st;
+
+    if (l < 6 || memcmp(tmpl+l-6, "XXXXXX", 6)) {
+        errno = EINVAL;
+        *tmpl = 0;
+        return tmpl;
+    }
+
+    do {
+        __randname(tmpl+l-6);
+        if (stat(tmpl, &st)) {
+            if (errno != ENOENT) *tmpl = 0;
+            return tmpl;
+        }
+    } while (--retries);
+
+    *tmpl = 0;
+    errno = EEXIST;
+    return tmpl;
+}
+
+static int
+mkstemp(char *tmpl) {
+    FILE *ftemp = fopen(mktemp(tmpl),"w");
+    return fileno(ftemp);
+}
+
+static char *
+tempnam (const char *dir, const char *pfx)
+{
+    char buf[FILENAME_MAX];
+    int all;
+    char *ptr;
+    int dirlen = strlen(dir);
+    if (dirlen>=FILENAME_MAX)
+        return NULL;
+
+    memcpy(buf,dir,FILENAME_MAX);
+    buf[dirlen] = '/';
+
+
+    if (pfx) {
+	all = dirlen + 1 + strlen(pfx);
+        if (all>=FILENAME_MAX)
+            return NULL;
+        memcpy(buf+dirlen+1, pfx, FILENAME_MAX - all);
+    } else {
+	all = dirlen + 1;
+    }
+
+    memcpy(buf+all, "XXXXXX", 6 );
+    all += 6 ;
+    buf[all]= 0;
+    ptr =   (char *)malloc(all);
+    memcpy(ptr, buf, all);
+    return mktemp(ptr);
+}
+
+} // extern "C"
diff --git a/panda/src/audiotraits/CMakeLists.txt b/panda/src/audiotraits/CMakeLists.txt
@@ -1,7 +1,7 @@
 if(NOT HAVE_AUDIO)
   return()
 elseif(NOT HAVE_FMODEX AND NOT HAVE_OPENAL)
-  message(SEND_ERROR
+  message(WARNING
     "You must have an audio backend for audio support! Turn off HAVE_AUDIO to ignore this.")
 endif()
 

diff --git a/panda/src/gobj/vertexDataSaveFile.cxx b/panda/src/gobj/vertexDataSaveFile.cxx
@@ -28,6 +28,11 @@
 #include <sys/file.h>
 #endif
 
+// Needed for lockf
+#if defined(__wasi__)
+#include "wasi.c"
+#endif // __wasi__
+
 using std::dec;
 using std::hex;
 

diff --git a/panda/src/testbed/pview.cxx b/panda/src/testbed/pview.cxx
@@ -31,6 +31,17 @@
 
 using std::cerr;
 using std::endl;
+#if defined(__wasi__)
+extern "C" {
+    int __cxa_allocate_exception(int discard) {
+        abort();
+    }
+
+    int __cxa_throw(int discarda, int discardb) {
+        abort();
+    }
+}
+#endif
 
 PandaFramework framework;