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re PR c/21668 (gratuitous warning about "extern const" with initializer)

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PR c/21668
        * c-decl.c (grokdeclarator): Don't warn for 'extern const' when
        compiling at the intersection of C and C++.

testsuite/
        PR c/21668
        * gcc.dg/Wc++-compat.c: New.
        * gcc.dg/Wno-c++-compat.c: New.

From-SVN: r107401
This commit is contained in:
Gabriel Dos Reis 2005-11-23 07:07:33 +00:00 committed by Gabriel Dos Reis
parent 638c5a49da
commit b8b47f4251
4 changed files with 31 additions and 2 deletions
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9
gcc/c-decl.c
View File

@ -4014,8 +4014,13 @@ grokdeclarator (const struct c_declarator *declarator,
&& !funcdef_flag)
{
/* 'extern' with initialization is invalid if not at file scope. */
if (current_scope == file_scope)
warning (0, "%qs initialized and declared %<extern%>", name);
if (current_scope == file_scope)
{
/* It is fine to have 'extern const' when compiling at C
and C++ intersection. */
if (!(warn_cxx_compat && constp))
warning (0, "%qs initialized and declared %<extern%>", name);
}
else
error ("%qs has both %<extern%> and initializer", name);
}

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2005-11-23 Gabriel Dos Reis <gdr@integrable-solutions.net>
PR c/21668
* gcc.dg/Wc++-compat.c: New.
* gcc.dg/Wno-c++-compat.c: New.
2005-11-23 Alan Modra <amodra@bigpond.net.au>
* gcc.target/powerpc/altivec-consts.c (vspltisb): Use int val.

9
gcc/testsuite/gcc.dg/Wc++-compat.c Normal file
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@ -0,0 +1,9 @@
/* Copyright (C) 2005 Free Software Foundation.
by Gabriel Dos Reis <gdr@integrable-solutions.net> */
/* { dg-do compile } */
/* { dg-options "-Wc++-compat" } */
extern const int foo = 42;

9
gcc/testsuite/gcc.dg/Wno-c++-compat.c Normal file
View File

@ -0,0 +1,9 @@
/* Copyright (C) 2005 Free Software Foundation.
by Gabriel Dos Reis <gdr@integrable-solutions.net> */
/* { dg-do compile } */
/* { dg-options "-Wno-c++-compat" } */
extern const int foo = 42; /* { dg-error "initialized and declared" } */