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c-decl.c (implicitly_declare): Diagnose incompatible implicit declarations.

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* c-decl.c (implicitly_declare): Diagnose incompatible implicit
	declarations.

testsuite:
	* gcc.dg/redecl-5.c: New test.
	* gcc.dg/format/attr-6.c: Expect warning for implicit declaration
	of scanf.

From-SVN: r85509
This commit is contained in:
Joseph Myers 2004-08-03 23:09:13 +01:00 committed by Joseph Myers
parent 2e84789689
commit 9cbe78fbeb
5 changed files with 48 additions and 0 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2004-08-03 Joseph S. Myers <jsm@polyomino.org.uk>
* c-decl.c (implicitly_declare): Diagnose incompatible implicit
declarations.
2004-08-03 Mike Stump <mrs@apple.com>
* config/darwin-c.c: Don't search in "/Local/Library/Frameworks"

17
gcc/c-decl.c
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@ -2082,6 +2082,23 @@ implicitly_declare (tree functionid)
implicit_decl_warning (functionid, decl);
C_DECL_IMPLICIT (decl) = 1;
}
if (DECL_BUILT_IN (decl))
{
if (!comptypes (default_function_type, TREE_TYPE (decl)))
{
warning ("incompatible implicit declaration of built-in"
" function %qD", decl);
}
}
else
{
if (!comptypes (default_function_type, TREE_TYPE (decl)))
{
error ("incompatible implicit declaration of function %qD",
decl);
locate_old_decl (decl, error);
}
}
bind (functionid, decl, current_scope,
/*invisible=*/false, /*nested=*/true);
return decl;

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2004-08-03 Joseph S. Myers <jsm@polyomino.org.uk>
* gcc.dg/redecl-5.c: New test.
* gcc.dg/format/attr-6.c: Expect warning for implicit declaration
of scanf.
2004-08-03 Roger Sayle <roger@eyesopen.com>
PR middle-end/16790

1
gcc/testsuite/gcc.dg/format/attr-6.c
View File

@ -18,4 +18,5 @@ void
foo (const char *s, int *p)
{
scanf("%ld", p); /* { dg-warning "format" "implicit scanf" } */
/* { dg-warning "implicit" "implicit decl warning" { target *-*-* } 20 } */
}

19
gcc/testsuite/gcc.dg/redecl-5.c Normal file
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@ -0,0 +1,19 @@
/* Test for multiple declarations and composite types. Diagnosis of
incompatible implicit declaration. */
/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
/* { dg-do compile } */
/* { dg-options "-std=c89" } */
void
f (void)
{
long z(); /* { dg-error "previous implicit declaration" } */
}
void
g (void)
{
z(); /* { dg-error "incompatible" } */
labs(1); /* { dg-warning "incompatible" } */
printf("x"); /* { dg-warning "incompatible" } */
}