Fixed regression on ARM caused by the changed behaviour of noStackFrame in commit ac474a2812.

doc/manual.txt

@@ -4673,9 +4673,10 @@ A proc can be marked with the `noStackFrame`:idx: pragma to tell the compiler
 it should not generate a stack frame for the proc. There are also no exit
 statements like ``return result;`` generated and the generated C function is
 declared as ``__declspec(naked)`` or ``__attribute__((naked))`` (depending on
-the used C compiler). This is useful for procs that only consist of an
-assembler statement.
+the used C compiler).
 
+**Note**: This pragma should only be used by procs which consist solely of assembler
+statements.
 
 error pragma
 ------------

lib/system.nim

@@ -1791,7 +1791,7 @@ when defined(JS):
 
 elif hostOS != "standalone":
   {.push stack_trace:off, profiler:off.}
-  proc add*(x: var string, y: cstring) {.noStackFrame.} =
+  proc add*(x: var string, y: cstring) =
     var i = 0
     while y[i] != '\0':
       add(x, y[i])

tests/run/temit.nim

@@ -9,9 +9,9 @@ static int cvariable = 420;
 
 """.}
 
-proc embedsC() {.noStackFrame.} = 
+proc embedsC() = 
   var nimrodVar = 89
-  {.emit: """fprintf(stdout, "%d\n", cvariable + (int)`nimrodVar`);""".}
+  {.emit: """printf("%d\n", cvariable + (int)`nimrodVar`);""".}
 
 embedsC()