builtin: support -d builtin_print_use_fprintf, make the C fn declarations stricter (#22137)

Author: spytheman

vlib/builtin/builtin.c.v

@@ -181,6 +181,10 @@ pub fn eprintln(s string) {
 		eprintln('eprintln(NIL)')
 		return
 	}
+	$if builtin_print_use_fprintf ? {
+		C.fprintf(C.stderr, c'%.*s\n', s.len, s.str)
+		return
+	}
 	$if freestanding {
 		// flushing is only a thing with C.FILE from stdio.h, not on the syscall level
 		bare_eprint(s.str, u64(s.len))
@@ -205,6 +209,10 @@ pub fn eprint(s string) {
 		eprint('eprint(NIL)')
 		return
 	}
+	$if builtin_print_use_fprintf ? {
+		C.fprintf(C.stderr, c'%.*s', s.len, s.str)
+		return
+	}
 	$if freestanding {
 		// flushing is only a thing with C.FILE from stdio.h, not on the syscall level
 		bare_eprint(s.str, u64(s.len))
@@ -267,6 +275,10 @@ pub fn unbuffer_stdout() {
 // print prints a message to stdout. Note that unlike `eprint`, stdout is not automatically flushed.
 @[manualfree]
 pub fn print(s string) {
+	$if builtin_print_use_fprintf ? {
+		C.fprintf(C.stdout, c'%.*s', s.len, s.str)
+		return
+	}
 	$if android && !termux {
 		C.android_print(C.stdout, c'%.*s\n', s.len, s.str)
 	} $else $if ios {
@@ -289,6 +301,10 @@ pub fn println(s string) {
 	$if noprintln ? {
 		return
 	}
+	$if builtin_print_use_fprintf ? {
+		C.fprintf(C.stdout, c'%.*s\n', s.len, s.str)
+		return
+	}
 	$if android && !termux {
 		C.android_print(C.stdout, c'%.*s\n', s.len, s.str)
 		return

vlib/builtin/builtin_nix.c.v

@@ -4,8 +4,10 @@
 module builtin
 
 fn builtin_init() {
-	$if !gc_warn_on_stderr ? {
-		gc_set_warn_proc(internal_gc_warn_proc_none)
+	$if gcboehm ? {
+		$if !gc_warn_on_stderr ? {
+			gc_set_warn_proc(internal_gc_warn_proc_none)
+		}
 	}
 }
 

vlib/builtin/builtin_windows.c.v

@@ -48,8 +48,10 @@ const enable_wrap_at_eol_output = 2
 const evable_virtual_terminal_processing = 4
 
 fn builtin_init() {
-	$if !gc_warn_on_stderr ? {
-		gc_set_warn_proc(internal_gc_warn_proc_none)
+	$if gcboehm ? {
+		$if !gc_warn_on_stderr ? {
+			gc_set_warn_proc(internal_gc_warn_proc_none)
+		}
 	}
 	g_original_codepage = C.GetConsoleOutputCP()
 	C.SetConsoleOutputCP(cp_utf8)

vlib/builtin/cfns.c.v

@@ -28,12 +28,8 @@ fn C.exit(code int)
 
 fn C.qsort(base voidptr, items usize, item_size usize, cb C.qsort_callback_func)
 
-fn C.sprintf(a ...voidptr) int
-
 fn C.strlen(s &char) int
 
-fn C.sscanf(&u8, &u8, ...&u8) int
-
 @[trusted]
 fn C.isdigit(c int) bool
 
@@ -43,21 +39,31 @@ fn C.popen(c &char, t &char) voidptr
 // <libproc.h>
 pub fn proc_pidpath(int, voidptr, int) int
 
-fn C.realpath(&char, &char) &char
+fn C.realpath(const_path &char, resolved_path &char) &char
 
 // fn C.chmod(byteptr, mode_t) int
-fn C.chmod(&char, u32) int
+fn C.chmod(path &char, mode u32) int
 
-fn C.printf(&char, ...voidptr) int
+fn C.printf(const_format &char, opt ...voidptr) int
+fn C.dprintf(fd int, const_format &char, opt ...voidptr) int
+fn C.fprintf(fstream &C.FILE, const_format &char, opt ...voidptr) int
+fn C.sprintf(str &char, const_format &char, opt ...voidptr) int
+fn C.snprintf(str &char, size usize, const_format &char, opt ...voidptr) int
+fn C.wprintf(const_format &u16, opt ...voidptr) int
+
+// used by Android for (e)println to output to the Android log system / logcat
+pub fn C.android_print(fstream voidptr, format &char, opt ...voidptr)
 
-fn C.scanf(&char, ...voidptr) int
+fn C.sscanf(str &char, const_format &char, opt ...voidptr) int
+fn C.scanf(const_format &char, opt ...voidptr) int
 
-fn C.puts(&char) int
+fn C.puts(msg &char) int
+@[trusted]
 fn C.abs(f64) f64
 
-fn C.fputs(str &char, stream &C.FILE) int
+fn C.fputs(msg &char, fstream &C.FILE) int
 
-fn C.fflush(&C.FILE) int
+fn C.fflush(fstream &C.FILE) int
 
 // TODO: define args in these functions
 fn C.fseek(stream &C.FILE, offset int, whence int) int
@@ -81,8 +87,10 @@ fn C.strchr(s &char, c int) &char
 @[trusted]
 fn C.getpid() int
 
+@[trusted]
 fn C.getuid() int
 
+@[trusted]
 fn C.geteuid() int
 
 fn C.system(cmd &char) int
@@ -203,10 +211,6 @@ fn C.strncmp(s &char, s2 &char, n int) int
 @[trusted]
 fn C.strerror(int) &char
 
-fn C.snprintf(str &char, size usize, format &char, opt ...voidptr) int
-
-fn C.fprintf(voidptr, &char, ...voidptr)
-
 @[trusted]
 fn C.WIFEXITED(status int) bool
 
@@ -295,8 +299,6 @@ fn C.GetConsoleMode(voidptr, &u32) bool
 @[trusted]
 fn C.GetCurrentProcessId() u32
 
-fn C.wprintf()
-
 // fn C.setbuf()
 fn C.setbuf(voidptr, &char)
 
@@ -504,8 +506,6 @@ fn C.glTexImage2D()
 // used by ios for println
 fn C.WrappedNSLog(str &u8)
 
-// used by Android for (e)println to output to the Android log system / logcat
-pub fn C.android_print(voidptr, &char, ...voidptr)
-
 // absolute value
+@[trusted]
 fn C.abs(number int) int