Re: c++/10470: [pch] spurious warning about "anonymous variadic macros were introduced in C99"

Re: c++/10470: [pch] spurious warning about "anonymous variadic macros were introduced in C99"

[Vladimir Merzliakov]

The following reply was made to PR c++/10470; it has been noted by GNATS.

From: "Vladimir Merzliakov" <wanderer@rsu.ru>
To: <gcc-gnats@gcc.gnu.org>, <and@rsu.ru>, <geoffk@gcc.gnu.org>,
   <gcc-bugs@gcc.gnu.org>, <gcc-prs@gcc.gnu.org>,
   "Vladimir Merzliakov" <wanderer@rsu.ru>
Cc:  
Subject: Re: c++/10470: [pch] spurious warning about "anonymous variadic macros were introduced in C99"
Date: Mon, 28 Apr 2003 16:31:52 +0400

 I prepare more simple testcase (now it not use any GCC headers)
 Sorry, i can't provide test.ii file (in this case bug isn't catched
 and test.cc compile fine with and without using PCH)
 
 Needed files:
 -testsys.h----8<--------
 #pragma GCC system_header
 #define __glibcpp_function_requires(...)
 -testsys.h---->8--------
 
 -test.h----8<-----------
 #include"testsys.h"
 -test.h---->8-----------
 
 -test.cc---8<-----------
 #include"test.h"
 -test.cc--->8-----------
 
 Script:
 -t---8<-----------
 #!/bin/sh -
 rm *.gch
 echo !!! Compile without gch
 g++ -ansi -Werror -pedantic -Winvalid-pch -o test.o -c test.cc
 echo !!! GCH generation
 g++ -ansi -Werror -pedantic -Winvalid-pch -o test.h.gch -c test.h
 echo !!! Compile with gch
 g++ -ansi -Werror -pedantic -Winvalid-pch -o test.o -c test.cc
 -t--->8-----------
 
 generate output:
 ----8<-----------
 !!! Compile without gch
 !!! GCH generation
 !!! Compile with gch
 test.cc:42:2: anonymous variadic macros were introduced in C99
 ---->8-----------
 
 GCC in PCH mode don't remember "#pragma GCC system_header" in testsys.h
 Also error location (test.cc:42:2) is invalid.
 
 I use for testing gcc version 3.4 20030428 (experimental)
 at FreeBSD 4.7-RELEASE-p9 .
 
 Vladimir
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10470
 
 

Re: c++/10470: [pch] spurious warning about "anonymous variadic macros were introduced in C99"

[bangerth]

Old Synopsis: anonymous variadic macros were introduced in C99 warning at pch using
New Synopsis: [pch] spurious warning about "anonymous variadic macros were introduced in C99"

Responsible-Changed-From-To: unassigned->geoffk
Responsible-Changed-By: bangerth
Responsible-Changed-When: Thu Apr 24 01:33:56 2003
Responsible-Changed-Why:
    pch
State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Thu Apr 24 01:33:56 2003
State-Changed-Why:
    Geoff, I think you're being overly harsh -- the bug report
    includes everything one needs to reproduce the problem. I
    see the very same reported problem on my linux box. It
    should be simple for you as well to reproduce this.
    
    W.
    
    g/x> cat x.h
    #include<string>
    
    g/x> cat x.cc
    #include"x.h"
    
    int main() {
      return 0;
    }
    
    g/x> rm x.h.gch
    rm: cannot remove `x.h.gch': No such file or directory
    g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -ansi -pedantic -Werror -Winvalid-pch -c x.cc
    g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -ansi -pedantic -Werror -Winvalid-pch -c x.h
    g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -ansi -pedantic -Werror -Winvalid-pch -c x.cc
    x.cc:679:2: anonymous variadic macros were introduced in C99
    
    Note also the bogus line number 679, which certainly doesn't
    exist in this file.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10470