* tracebak.c (i386): Use GCC unwinder on Linux with GCC > 4.5.

From-SVN: r163352

* tracebak.c (i386): Use GCC unwinder on Linux with GCC > 4.5.
From-SVN: r163352
fbb12873 · Eric Botcazou · Eric Botcazou · 21667997 · fbb12873 · fbb12873
Commit fbb12873 authored 14 years ago by Eric Botcazou Committed by Eric Botcazou 14 years ago
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gcc/ada/ChangeLog
+4 -0

gcc/ada/tracebak.c
+7 -0

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--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
+2010-08-18  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* tracebak.c (i386): Use GCC unwinder on Linux with GCC > 4.5.
+
 2010-08-10  Robert Dewar  <dewar@adacore.com>

 	* sem_ch8.adb, sem_ch8.ads: Change name Write_Scopes to ws.

--- a/gcc/ada/tracebak.c
+++ b/gcc/ada/tracebak.c
@@ -303,7 +303,14 @@ struct layout
 #define IS_BAD_PTR(ptr) 0
 #endif

+/* Starting with GCC 4.6, -fomit-frame-pointer is turned on by default for
+   32-bit x86/Linux as well and DWARF 2 unwind tables are emitted instead.
+   See the x86-64 case below for the drawbacks with this approach.  */
+#if defined (linux) && (__GNUC__ * 10 + __GNUC_MINOR__ > 45)
+#define USE_GCC_UNWINDER
+#else
 #define USE_GENERIC_UNWINDER
+#endif

 struct layout
 {