C backend: Only pass -masm=... to gcc on x86 or x86_64

(cherry picked from commit 06d6cd7)

Author: dkl

changelog.txt

@@ -16,6 +16,7 @@ Version 1.02.1
 - crt/string.bi, crt/mem.bi: Added CONSTs to function declarations
 - #767: Illegal byref result assignments will now cause a proper error message, not just a warning
 - Using the -asm att|intel option for non-x86[_64] targets now triggers an error
+- C backend: -masm=... will now only be passed to gcc for x86[_64] targets
 
 
 Version 1.02.0

src/compiler/fbc.bas

@@ -2798,9 +2798,12 @@ private function hCompileStage2Module( byval module as FBCIOFILE ptr ) as intege
 			ln += "-mfpmath=sse -msse2 "
 		end if
 
-		if( fbGetOption( FB_COMPOPT_ASMSYNTAX ) = FB_ASMSYNTAX_INTEL ) then
-			ln += "-masm=intel "
-		end if
+		select case( fbGetCpuFamily( ) )
+		case FB_CPUFAMILY_X86, FB_CPUFAMILY_X86_64
+			if( fbGetOption( FB_COMPOPT_ASMSYNTAX ) = FB_ASMSYNTAX_INTEL ) then
+				ln += "-masm=intel "
+			end if
+		end select
 
 	case FB_BACKEND_LLVM
 		select case( fbGetCpuFamily( ) )