From: Johannes Kanig <ka...@adacore.com>

When invoked by gnat2why, the Warning_Doc_Switch was unintenionally
reset.

gcc/ada/ChangeLog:

        * gnat1drv.adb: (SPARK_Library_Warning): preserve Warning_Doc_Switch

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/ada/gnat1drv.adb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/ada/gnat1drv.adb b/gcc/ada/gnat1drv.adb
index 120de4afb71..39aa89c43a3 100644
--- a/gcc/ada/gnat1drv.adb
+++ b/gcc/ada/gnat1drv.adb
@@ -523,6 +523,8 @@ procedure Gnat1drv is
          Restore_Warnings
            ((Warnings_Package.Elab_Warnings => True,
              Warnings_Package.Warn_On_Suspicious_Contract => True,
+             Warnings_Package.Warning_Doc_Switch =>
+               Warnsw.Warning_Doc_Switch,
              others => False));
 
          --  Suppress the generation of name tables for enumerations, which are
-- 
2.43.0

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