Keep bootstrap tendrils: set egcc as the compiler, set default backend
to gcc, set default assembly to AT&T (gas).

Index: src/compiler/fbc.bas
--- src/compiler/fbc.bas.orig
+++ src/compiler/fbc.bas
@@ -125,7 +125,7 @@ end enum
 
 static shared as zstring * 8 toolnames(0 to FBCTOOL__COUNT-1) = _
 { _
-	"as", "ar", "ld", "gcc", "llc", "dlltool", "GoRC", "windres", "cxbe" _
+	"as", "ar", "ld", "egcc", "llc", "dlltool", "GoRC", "windres", "cxbe" _
 }
 
 declare sub fbcFindBin _
@@ -149,6 +149,10 @@ declare function fbcRunBin _
 
 dim shared as FBCCTX fbc
 
+'' Just set this now.
+fbc.prefix = pathStripDiv("${TRUEPREFIX}")
+hReplaceSlash( fbc.prefix, asc( FB_HOST_PATHDIV ) )
+
 private sub fbcInit( )
 	const FBC_INITFILES = 64
 
@@ -2189,11 +2193,7 @@ private sub hParseArgs( byval argc as integer, byval a
 	'' or cross-compiling. Even on a 64bit x86_64 host where
 	'' FB_DEFAULT_BACKEND is -gen gcc, we still prefer using -gen gas when
 	'' cross-compiling to 32bit x86.
-	if( fbGetCpuFamily( ) = FB_CPUFAMILY_X86 ) then
-		fbSetOption( FB_COMPOPT_BACKEND, FB_BACKEND_GAS )
-	else
-		fbSetOption( FB_COMPOPT_BACKEND, FB_BACKEND_GCC )
-	end if
+	fbSetOption( FB_COMPOPT_BACKEND, FB_BACKEND_GCC )
 
 	'' 6. -gen overrides any other backend setting.
 	if( fbc.backend >= 0 ) then
@@ -2803,8 +2803,8 @@ private function hCompileStage2Module( byval module as
 
 		select case( fbGetCpuFamily( ) )
 		case FB_CPUFAMILY_X86, FB_CPUFAMILY_X86_64
-			if( fbGetOption( FB_COMPOPT_ASMSYNTAX ) = FB_ASMSYNTAX_INTEL ) then
-				ln += "-masm=intel "
+			if( fbGetOption( FB_COMPOPT_ASMSYNTAX ) = FB_ASMSYNTAX_ATT ) then
+				ln += "-masm=att "
 			end if
 		end select
 
@@ -2828,8 +2828,8 @@ private function hCompileStage2Module( byval module as
 
 		select case( fbGetCpuFamily( ) )
 		case FB_CPUFAMILY_X86, FB_CPUFAMILY_X86_64
-			if( fbGetOption( FB_COMPOPT_ASMSYNTAX ) = FB_ASMSYNTAX_INTEL ) then
-				ln += "--x86-asm-syntax=intel "
+			if( fbGetOption( FB_COMPOPT_ASMSYNTAX ) = FB_ASMSYNTAX_ATT ) then
+				ln += "--x86-asm-syntax=att "
 			end if
 		end select