[PATCH] testsuite: c++: Allow for std::printf in g++.dg/modules/stdio-1_a.H [PR98529]

[Rainer Orth]

g++.dg/modules/stdio-1_a.H currently FAILs on Solaris:

FAIL: g++.dg/modules/stdio-1_a.H -std=c++17  scan-lang-dump module "Depset:0 
decl entity:[0-9]* function_decl:'::printf'"
FAIL: g++.dg/modules/stdio-1_a.H -std=c++2a  scan-lang-dump module "Depset:0 
decl entity:[0-9]* function_decl:'::printf'"
FAIL: g++.dg/modules/stdio-1_a.H -std=c++2b  scan-lang-dump module "Depset:0 
decl entity:[0-9]* function_decl:'::printf'"

The problem is that the module file doesn't contain

 Depset:0 decl entity:95 function_decl:'::printf'

as expected by the test, but

 Depset:0 decl entity:26 function_decl:'::std::printf'

This happens because Solaris <stdio.h> declares printf in namespace std
as allowed by C++11, Annex D, D.5.

This patch allows for both forms.

Tested on i386-pc-solaris2.11, sparc-sun-solaris2.11, and
x86_64-pc-linux-gnu.

Ok for trunk?

        Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University


2024-05-13  Rainer Orth  <r...@cebitec.uni-bielefeld.de>

        gcc/testsuite:
        PR c++/98529
        * g++.dg/modules/stdio-1_a.H (scan-lang-dump): Allow for
        ::std::printf.


diff --git a/gcc/testsuite/g++.dg/modules/stdio-1_a.H b/gcc/testsuite/g++.dg/modules/stdio-1_a.H
--- a/gcc/testsuite/g++.dg/modules/stdio-1_a.H
+++ b/gcc/testsuite/g++.dg/modules/stdio-1_a.H
@@ -10,5 +10,5 @@
 #endif
 // There should be *lots* of depsets (209 for glibc today)
 // { dg-final { scan-lang-dump {Writing section:60 } module } }
-// { dg-final { scan-lang-dump {Depset:0 decl entity:[0-9]* function_decl:'::printf'} module } }
+// { dg-final { scan-lang-dump {Depset:0 decl entity:[0-9]* function_decl:'(::std)?::printf'} module } }
 // { dg-final { scan-lang-dump {Depset:1 binding namespace_decl:'::printf'} module } }