[PATCH] riscv: Enable -fasynchronous_unwind_tables by default on Linux

[Andreas Schwab]

This follows the example of aarch64.

gcc/:
	* common/config/riscv/riscv-common.cc
	(riscv_option_optimization_table)
	[TARGET_DEFAULT_ASYNC_UNWIND_TABLES]: Enable
	-fasynchronous_unwind_tables and -funwind-tables.
	* config.gcc (riscv*-*-linux*): Define
	TARGET_DEFAULT_ASYNC_UNWIND_TABLES.
---
 gcc/common/config/riscv/riscv-common.cc | 4 ++++
 gcc/config.gcc                          | 1 +
 2 files changed, 5 insertions(+)

diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc
index 2e3116e7673..616e2f897b9 100644
--- a/gcc/common/config/riscv/riscv-common.cc
+++ b/gcc/common/config/riscv/riscv-common.cc
@@ -1756,6 +1756,10 @@ static const struct default_options riscv_option_optimization_table[] =
   {
     { OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
     { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
+#if TARGET_DEFAULT_ASYNC_UNWIND_TABLES == 1
+    { OPT_LEVELS_ALL, OPT_fasynchronous_unwind_tables, NULL, 1 },
+    { OPT_LEVELS_ALL, OPT_funwind_tables, NULL, 1},
+#endif
     { OPT_LEVELS_NONE, 0, NULL, 0 }
   };
 
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 89f56047cfe..744b46fb3b0 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -2417,6 +2417,7 @@ riscv*-*-linux*)
 	*) echo "Unknown value for enable_multilib"; exit 1
 	esac
 	tmake_file="${tmake_file} riscv/t-riscv riscv/t-linux"
+	tm_defines="${tm_defines} TARGET_DEFAULT_ASYNC_UNWIND_TABLES=1"
 	gnu_ld=yes
 	gas=yes
 	case $target in
-- 
2.39.1


-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."