Inline assembly with the Intel syntax, linking to local variables

I am porting existing code from Windows to Linux (Visual C++ to g++). It includes inline assembly sections.

g++ supports a compilation switch (-masm=intel) telling it to accept the Intel syntax instead of the AT&T one. So far so good, it should avoid painful rewriting of thousands of lines.

Anyway, there are issues with referencing the C++ variables outside the inline assembly blocks.

For instance, building

void Test()
{
  int i;
  asm("mov [i], 5");
  ...
}

results in the linker error undefined reference to `i'. And the assembler seems to get confused with the branching labels.

From Web searches, it seems that local variables cannot be referenced from assembly when using the Intel syntax :-(. I found several related posts, but none rescued me.

This is annoying as I can't make my variables global. (This would break multi-thread safeness and it does not seem to be compatible with namespaces).

Any hint ?

Tags: ASM, g++, Intel