time: gmt offset; macos syscalls

vlib/compiler/cgen.v

@@ -54,7 +54,7 @@ fn new_cgen(out_name_c string) &CGen {
 		out_path: path
 		out: out
 		// buf: strings.new_builder(10000)
-		
+
 		lines: make(0, 1000, sizeof(string))
 	}
 	return gen
@@ -347,6 +347,9 @@ fn os_name_to_ifdef(name string) string {
 		'haiku' {
 			return '__haiku__'
 		}
+		'linux_or_macos' {
+			return ''
+		}
 		else {
 			verror('bad os ifdef name "$name"')
 		}}

vlib/compiler/comptime.v

@@ -27,15 +27,21 @@ fn (p mut Parser) comp_time() {
 			if name == 'mac' {
 				p.warn('use `macos` instead of `mac`')
 			}
+
 			if not {
 				p.genln('#ifndef $ifdef_name')
 			}
 			else {
-				p.genln('#ifdef $ifdef_name')
+				if name == 'linux_or_macos' {
+					p.genln('#if defined(__linux) || defined(__APPLE__)')
+				} else {
+					p.genln('#ifdef $ifdef_name')
+				}
 			}
 			p.check(.lcbr)
 			os := os_from_string(name)
-			if ((!not && os != p.os) || (not && os == p.os)) && !p.scanner.is_fmt && !p.pref.output_cross_c {
+			if ((!not && os != p.os) || (not && os == p.os)) && !name.contains('_or_') &&
+				 !p.scanner.is_fmt && !p.pref.output_cross_c {
 				// `$if os {` for a different target, skip everything inside
 				// to avoid compilation errors (like including <windows.h>
 				// on non-Windows systems)

vlib/compiler/main.v

@@ -31,7 +31,7 @@ enum BuildMode {
 
 const (
 	supported_platforms = ['windows', 'mac', 'macos', 'linux', 'freebsd', 'openbsd', 'netbsd',
-		'dragonfly', 'android', 'js', 'solaris', 'haiku']
+		'dragonfly', 'android', 'js', 'solaris', 'haiku', 'linux_or_macos']
 )
 
 enum OS {
@@ -1281,6 +1281,9 @@ pub fn os_from_string(os string) OS {
 		'haiku' {
 			return .haiku
 		}
+		'linux_or_macos' {
+			return .linux
+		}
 		else {
 			panic('bad os $os')
 		}}