diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 21d31a5c6b07..c5d3ce956ed3 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -4,6 +4,7 @@
 	-march=v10 option on target ! march_option.
 	* gcc.target/cris/asm-v10.S, gcc.target/cris/inasm-v10.c,
 	gcc.target/cris/sync-1-v10.c: Similar.
+	* lib/target-supports.exp (effective_target_march_option): New.
 
 2020-01-19  Thomas König  <tkoenig@gcc.gnu.org>
 
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 79166986c77b..cdee31e24132 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -2477,6 +2477,10 @@ proc check_effective_target_ti_c64xp { } {
     }]
 }
 
+# Check if a -march=... option is given, as part of (earlier) options.
+proc check_effective_target_march_option { } {
+    return [check-flags [list "" { *-*-* } { "-march=*" } { "" } ]]
+}
 
 proc check_alpha_max_hw_available { } {
     return [check_runtime alpha_max_hw_available {