[gcc r12-6656] Update check_effective_target_recent_python3

[Martin Liska <marxin@gcc.gnu.org>]

https://gcc.gnu.org/g:50c3975129c5d97387bbe4976bea1931d3fad0b2

commit r12-6656-g50c3975129c5d97387bbe4976bea1931d3fad0b2
Author: Martin Liska <mliska@suse.cz>
Date:   Tue Jan 18 09:16:26 2022 +0100

    Update check_effective_target_recent_python3
    
    Require at least Python 3.6.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.src/maintainers.exp: Use the new
            check_effective_target_recent_python3.
            * lib/target-supports.exp: Check for Python3 version >= 3.6.

Diff:
---
 gcc/testsuite/gcc.src/maintainers.exp | 4 ++--
 gcc/testsuite/lib/target-supports.exp | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/gcc/testsuite/gcc.src/maintainers.exp b/gcc/testsuite/gcc.src/maintainers.exp
index 63361dd5e4b..a4b3986be77 100644
--- a/gcc/testsuite/gcc.src/maintainers.exp
+++ b/gcc/testsuite/gcc.src/maintainers.exp
@@ -24,8 +24,8 @@ proc gcc_src_run_maintainers_verify_sh {} {
     set contrib $rootdir/contrib
     set maintainers $rootdir/MAINTAINERS
 
-    if { ![check_effective_target_python3] } {
-      unsupported "$script python3 is missing"
+    if { ![check_effective_target_recent_python3] } {
+      unsupported "$script recent python3 is missing"
       return
     }
 
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index fd48475a57c..fbb6c735223 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -11723,10 +11723,10 @@ proc check_effective_target___OPTIMIZE__ {} {
     } [current_compiler_flags]]
 }
 
-# Return 1 if python3 is available.
+# Return 1 if python3 (>= 3.6) is available.
 
-proc check_effective_target_python3 { } {
-    set result [remote_exec host "python3 --version"]
+proc check_effective_target_recent_python3 { } {
+    set result [remote_exec host "python3 -c \"import sys; assert sys.version_info >= (3, 6)\""]
     set status [lindex $result 0]
     if { $status == 0 } then {
         return 1;