fbc: '-eunwind' command line option to enable stack unwind informatio…

…n, implied by '-e', '-ex', '-exx'

- enables "-funwind-tables" link time option on '-gen gcc' 32-bit
- "-funwind-tables" always enabled on 64-bit targets

changelog.txt

@@ -20,7 +20,7 @@ Version 1.10.0
 [added]
 - gas64: '.cif_sections' and '.cif_' directives for stack unwinding (adeyblue)
 - gas64: '.seh_' directives for stack unwinding (adeyblue)
-- fbc: '-eunwind' command line option to enable stack unwind information
+- fbc: '-eunwind' command line option to enable stack unwind information, implied by '-e', '-ex', '-exx'
 - fbc: set bit value '__FB_ERR__' = &h200 if '-eunwind' is enabled
 - gas64 : stack overflow check (total of all local variables) at compile time --> warning - stack size for linux = 8MB, for Windows = default or defined by user (SARG)
 - gas64 : stack overflow check at run time if -exx is used - stack size for linux = 8MB, for Windows = default or defined by user (SARG)

src/compiler/fbc.bas

@@ -1866,6 +1866,7 @@ private sub handleOpt _
 	case OPT_EX
 		fbSetOption( FB_COMPOPT_ERRORCHECK, TRUE )
 		fbSetOption( FB_COMPOPT_RESUMEERROR, TRUE )
+		fbSetOption( FB_COMPOPT_UNWINDINFO, TRUE )
 
 	case OPT_EXX
 		fbSetOption( FB_COMPOPT_ERRORCHECK, TRUE )
@@ -1874,6 +1875,7 @@ private sub handleOpt _
 		fbSetOption( FB_COMPOPT_ERRLOCATION, TRUE )
 		fbSetOption( FB_COMPOPT_ARRAYBOUNDCHECK, TRUE )
 		fbSetOption( FB_COMPOPT_NULLPTRCHECK, TRUE )
+		fbSetOption( FB_COMPOPT_UNWINDINFO, TRUE )
 
 	case OPT_EXPORT
 		fbSetOption( FB_COMPOPT_EXPORT, TRUE )
@@ -3355,7 +3357,7 @@ private function hCompileStage2Module( byval module as FBCIOFILE ptr ) as intege
 
 		'' But enable unwind-tables on x64, these GREATLY increase the accuracy of
 		'' debuggers and crash tools across platforms for minimal overhead
-		if ( ism64Target ) then
+		if( (ism64Target = TRUE) or (fbGetOption( FB_COMPOPT_UNWINDINFO ) = TRUE) ) then
 			ln += "-funwind-tables "
 		else
 			ln += "-fno-unwind-tables "