xtensa-uclinux uses bFLT executable file format that cannot relocate
fields representing offsets from data to code. C++ objects built as PIC
use offsets to encode FDE structures. As a result C++ exception handling
doesn't work correctly on xtensa-uclinux. Don't use PIC by default on
xtensa-uclinux.
gcc/
2018-11-04 Max Filippov <jcmvb...@gmail.com>
* config/xtensa/uclinux.h (XTENSA_ALWAYS_PIC): Change to 0.
---
Changes v1->v2:
- fix up comment for the XTENSA_ALWAYS_PIC macro
gcc/config/xtensa/uclinux.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/config/xtensa/uclinux.h b/gcc/config/xtensa/uclinux.h
index ba26187c8f7a..c7743df9d97c 100644
--- a/gcc/config/xtensa/uclinux.h
+++ b/gcc/config/xtensa/uclinux.h
@@ -59,8 +59,8 @@ along with GCC; see the file COPYING3. If not see
#undef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX "."
-/* Always enable "-fpic" for Xtensa Linux. */
-#define XTENSA_ALWAYS_PIC 1
+/* Don't enable "-fpic" for Xtensa uclinux. */
+#define XTENSA_ALWAYS_PIC 0
#undef TARGET_LIBC_HAS_FUNCTION
#define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function
--
2.11.0
