toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_93847

git package fails to build for the Nios2 architecture with optimization
enabled with gcc < 9.x:
http://autobuild.buildroot.net/results/924/92484c49b655e4aa78ca52f124c6d8f605b9d06b/

It's been reported upstream:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93847

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

diff --git a/toolchain/Config.in b/toolchain/Config.in
index 87509f3d644b43b10bc5cff6d4ffef1f18cf930f..bff572805d2e7ce37759738bcb2b4926e8fd8698 100644 (file)
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -159,6 +159,13 @@ config BR2_TOOLCHAIN_HAS_GCC_BUG_90620
        bool
        default y if BR2_microblaze
 
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93847
+# ICE: compiler error: Segmentation fault on Nios II. This bug
+# no longer exists in gcc 9.x.
+config BR2_TOOLCHAIN_HAS_GCC_BUG_93847
+       bool
+       default y if BR2_nios2 && !BR2_TOOLCHAIN_GCC_AT_LEAST_9
+
 config BR2_TOOLCHAIN_HAS_NATIVE_RPC
        bool