current trunk fails to build on arm-linux with:
In file included from ../../../../src/libbacktrace/backtrace.c:35:0:
../libgcc/unwind.h: In function '_Unwind_decode_typeinfo_ptr':
../libgcc/unwind.h:42:45: error: unused parameter 'base'
[-Werror=unused-parameter]
_Unwind_decode_typeinfo_ptr (_Unwind_Word base, _Unwind_Word ptr)
^
../libgcc/unwind.h: In function '__gnu_unwind_24bit':
../libgcc/unwind.h:68:41: error: unused parameter 'context'
[-Werror=unused-parameter]
__gnu_unwind_24bit (_Unwind_Context * context, _uw data, int compact)
^
../libgcc/unwind.h:68:54: error: unused parameter 'data'
[-Werror=unused-parameter]
__gnu_unwind_24bit (_Unwind_Context * context, _uw data, int compact)
^
../libgcc/unwind.h:68:64: error: unused parameter 'compact'
[-Werror=unused-parameter]
__gnu_unwind_24bit (_Unwind_Context * context, _uw data, int compact)
^
cc1: all warnings being treated as errors
make[8]: *** [backtrace.lo] Error 1
the immediate fix is to mark all arguments as unused, however I don't know if
this function should be used by libbacktrace, if it returns _URC_FAILURE
unconditionally.
* config/arm/unwind-arm.h (__gnu_unwind_24bit): Mark parameters
as unused.
--- libgcc/config/arm/unwind-arm.h (revision 192162)
+++ libgcc/config/arm/unwind-arm.h (working copy)
@@ -64,8 +64,11 @@
return tmp;
}
+#define __unused __attribute__((unused))
+
static inline _Unwind_Reason_Code
- __gnu_unwind_24bit (_Unwind_Context * context, _uw data, int compact)
+ __gnu_unwind_24bit (_Unwind_Context * context __unused, _uw data __unused,
+ int compact __unused)
{
return _URC_FAILURE;
}
