serenity: add more support

cmd/v/help/build-c.txt

@@ -88,8 +88,16 @@ see also `v help build`.
       Change the target OS that V tries to compile for.
       By default, the target OS is the host system.
       When OS is `cross`, V will attempt to output cross-platform C code.
-      List of OS supported by V: `linux`, `windows`, `ios`, `mac`, `freebsd`, `openbsd`,
-                                 `netbsd`, `dragonfly`, `solaris`, `android` and `haiku`.
+	  
+      Here is a list of the operating systems, supported by V:
+      (CI tests runs on every commit/PR for each of these):
+            `windows`, `linux`, `macos`
+
+      The compiler is known to also work, and has support for these operating
+      systems also (although we do not test it as regularly as for the above):
+            `android`, `ios`,
+            `freebsd`, `openbsd`, `netbsd`, `dragonfly`,
+            `solaris`, `serenity`, `haiku`
 
       Note that V has the concept of platform files, i.e. files ending
       with `_platform.c.v`, and usually only the matching files are used in

vlib/v/checker/checker.v

@@ -21,8 +21,7 @@ const int_max = int(0x7FFFFFFF)
 const (
 	valid_comp_if_os            = ['windows', 'ios', 'macos', 'mach', 'darwin', 'hpux', 'gnu',
 		'qnx', 'linux', 'freebsd', 'openbsd', 'netbsd', 'bsd', 'dragonfly', 'android', 'solaris',
-		'haiku',
-	]
+		'haiku', 'serenity']
 	valid_comp_if_compilers     = ['gcc', 'tinyc', 'clang', 'mingw', 'msvc', 'cplusplus']
 	valid_comp_if_platforms     = ['amd64', 'i386', 'aarch64', 'arm64', 'arm32', 'rv64', 'rv32']
 	valid_comp_if_cpu_features  = ['x64', 'x32', 'little_endian', 'big_endian']

vlib/v/doc/doc.v

@@ -40,7 +40,9 @@ pub enum Platform {
 	js // for interoperability in prefs.OS
 	android
 	solaris
+	serenity
 	haiku
+	raw
 	cross // TODO: add functionality for v doc -os cross whenever possible
 }
 
@@ -58,6 +60,7 @@ pub fn platform_from_string(platform_str string) ?Platform {
 		'dragonfly' { return .dragonfly }
 		'js' { return .js }
 		'solaris' { return .solaris }
+		'serenity' { return .serenity }
 		'android' { return .android }
 		'haiku' { return .haiku }
 		'nix' { return .linux }

vlib/v/pref/os.v

@@ -59,7 +59,7 @@ pub fn (o OS) str() string {
 		.js { return 'JavaScript' }
 		.android { return 'Android' }
 		.solaris { return 'Solaris' }
-		.serenity { return 'serenity' }
+		.serenity { return 'SerenityOS' }
 		.haiku { return 'Haiku' }
 		.raw { return 'Raw' }
 		.all { return 'all' }

vlib/v/pref/should_compile.v

@@ -181,6 +181,9 @@ pub fn (prefs &Preferences) should_compile_c(file string) bool {
 	if prefs.os != .solaris && file.ends_with('_solaris.c.v') {
 		return false
 	}
+	if prefs.os != .serenity && file.ends_with('_serenity.c.v') {
+		return false
+	}
 	return true
 }