Define custom true and false macros in em_js.h and em_asm.h

Author: hoodmane

emcc.py

@@ -969,6 +969,7 @@ def compile_source_file(input_file):
       # driver to perform linking which would be big change.
       cmd += ['-Xclang', '-split-dwarf-file', '-Xclang', unsuffixed_basename(input_file) + '.dwo']
       cmd += ['-Xclang', '-split-dwarf-output', '-Xclang', unsuffixed_basename(input_file) + '.dwo']
+    print(" ".join(cmd))
     shared.check_call(cmd)
     if not shared.SKIP_SUBPROCS:
       assert os.path.exists(output_file)

system/include/emscripten/em_asm.h

@@ -285,4 +285,14 @@ const char __em_asm_sig_builder<__em_asm_type_tuple<Args...> >::buffer[] = { __e
 #define EM_ASM_INT_V(code) EM_ASM_INT(code)
 #define EM_ASM_DOUBLE_V(code) EM_ASM_DOUBLE(code)
 
+#if defined(true) && defined(false)
+#undef true
+#undef false
+// These work for both C and javascript.
+// In C !!0 ==> 0 and in javascript !!0 ==> false
+// In C !!1 ==> 1 and in javascript !!1 ==> true
+#define true (!!1)
+#define false (!!0)
+#endif
+
 #endif // !defined(__cplusplus) && defined(__STRICT_ANSI__)

system/include/emscripten/em_js.h

@@ -72,3 +72,14 @@
 
 #define EM_ASYNC_JS(ret, name, params, ...) _EM_JS(ret, name, __asyncjs__##name, params,          \
   "{ return Asyncify.handleAsync(async () => " #__VA_ARGS__ "); }")
+
+
+#if defined(true) && defined(false)
+#undef true
+#undef false
+// These work for both C and javascript.
+// In C !!0 ==> 0 and in javascript !!0 ==> false
+// In C !!1 ==> 1 and in javascript !!1 ==> true
+#define true (!!1)
+#define false (!!0)
+#endif

system/lib/libc/musl/include/stdbool.h

@@ -3,11 +3,8 @@
 
 #ifndef __cplusplus
 
-// These work for both C and javascript.
-// In C !!0 ==> 0 and in javascript !!0 ==> false
-// In C !!1 ==> 1 and in javascript !!1 ==> true
-#define true (!!1)
-#define false (!!0)
+#define true 1
+#define false 0
 #define bool _Bool
 
 #endif