PR64606 reports several warnings when building the arm target
libgcc. The -Wmissing-prototypes warnings in config/arm/fp16.c have
since been fixed (the internal helpers are now static inline and the
public functions have prototypes), leaving one -Wcast-qual warning:
unwind-arm-common.inc: In function get_eit_entry:
unwind-arm-common.inc:245:29: warning: cast discards const
qualifier from pointer target type [-Wcast-qual]
ucbp->pr_cache.ehtp = (_Unwind_EHT_Header *)&eitp->content;
The type of the ehtp field is fixed by the EHABI so it cannot be made
const; launder the cast through _uw (matching the _uw <-> pointer
conversions already used for this field) to avoid the warning.
libgcc/ChangeLog:
PR target/64606
* unwind-arm-common.inc (get_eit_entry): Avoid -Wcast-qual
warning when caching the immediate-data exception-handling
table pointer.
Signed-off-by: Dominic P <[email protected]>
---
libgcc/unwind-arm-common.inc | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libgcc/unwind-arm-common.inc b/libgcc/unwind-arm-common.inc
index 38a67889a..7a716770e 100644
--- a/libgcc/unwind-arm-common.inc
+++ b/libgcc/unwind-arm-common.inc
@@ -368,8 +368,9 @@ get_eit_entry (_Unwind_Control_Block *ucbp, _uw
return_address)
if (eitp->content & uint32_highbit)
{
- /* It is immediate data. */
- ucbp->pr_cache.ehtp = (_Unwind_EHT_Header *)&eitp->content;
+ /* It is immediate data. Cast via _uw to avoid a warning about
+ casting away the const qualifier; ehtp is not written through. */
+ ucbp->pr_cache.ehtp = (_Unwind_EHT_Header *) (_uw) &eitp->content;
ucbp->pr_cache.additional = 1;
}
else
--
2.55.0
