-fno-rtti (disable TypeInfo) support ready for testing

[Mike via D.gnu]

On Sunday, 10 May 2015 at 17:45:30 UTC, Johannes Pfau wrote:
> I've just opened a pull request for -fno-rtti at [1]. The 
> frontend part
> needs to go into DMD but I'd like some testing feedback first. 
> This is
> especially important as I had literally no time to test this
> updated code ;-) Please provide feedback here or at [1].
>

Thanks for doing this!

I tested my LCD demo and I get the following errors,

Compiler command
----------------
arm-none-eabi-gdc -c -O3 -nophoboslib -nostdinc -nodefaultlibs 
-nostdlib -mthumb -mcpu=cortex-m4 -fno-bounds-check 
-fno-invariants -fno-in -fno-out -fno-emit-moduleinfo -fno-rtti 
-ffunction-sections -fdata-sections {some_imports} 
{my_source_files} -o binary/firmware.o

Compiler output
---------------
source/stm32f42/trace.d:58:5: error: Can't use array literal: 
TypeInfo disabled using -fno-rtti switch.
      [
      ^
cc1d: error: Can't use typeid: TypeInfo disabled using -fno-rtti 
switch.
source/gcc/attribute.d:10:12: error: template instance 
gcc.attribute.Attribute!string error instantiating
      return Attribute!A(args);
             ^
source/gcc/attribute.d:13:45: note: instantiated from here: 
attribute!(string)
  public enum inline = gcc.attribute.attribute("forceinline");


Here's the code causing the error
---------------------------------

https://github.com/JinShil/stm32f42_discovery_demo/blob/master/source/stm32f42/trace.d#L57
private void semihostingWrite(in void* ptr, in uint length)
{
   uint[3] message = [ 2, cast(uint)ptr, length];  // line 58
   semihostingInvoke(0x05, &message);
}

// attribute.d
/*************/
private struct Attribute(A...)
{
   A args;
}

https://github.com/JinShil/stm32f42_discovery_demo/blob/master/source/gcc/attribute.d
auto attribute(A...)(A args) if(A.length > 0 && is(A[0] == 
string))
{
   // line 10
   return Attribute!A(args);
}

//line 13
public enum inline = gcc.attribute.attribute("forceinline");
public enum naked = gcc.attribute.attribute("naked");


Without the -fno-rtti switch, everything builds fine.

Mike