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| author | Joseph Myers <jsm@polyomino.org.uk> | 2004-08-03 23:09:13 +0100 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2004-08-03 23:09:13 +0100 |
| commit | 9cbe78fbeb3898ab7f59faba4f027f9fd0a1a4ee (patch) | |
| tree | a534cd9d6e051f107ee4ae8faa1e824cf9bddaeb /gcc | |
| parent | 2e847896896e3283a0551eeb46b4d3c3c8211d2a (diff) | |
| download | gcc-9cbe78fbeb3898ab7f59faba4f027f9fd0a1a4ee.zip gcc-9cbe78fbeb3898ab7f59faba4f027f9fd0a1a4ee.tar.gz gcc-9cbe78fbeb3898ab7f59faba4f027f9fd0a1a4ee.tar.bz2 | |
c-decl.c (implicitly_declare): Diagnose incompatible implicit declarations.
* 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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/c-decl.c | 17 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/format/attr-6.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/redecl-5.c | 19 |
5 files changed, 48 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 16eacaf..14c2b37 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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" diff --git a/gcc/c-decl.c b/gcc/c-decl.c index 27860b4..cbdafbb 100644 --- a/gcc/c-decl.c +++ b/gcc/c-decl.c @@ -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; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index db11af6..f5d0e36 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -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 diff --git a/gcc/testsuite/gcc.dg/format/attr-6.c b/gcc/testsuite/gcc.dg/format/attr-6.c index 4e95cfb..0f68322 100644 --- a/gcc/testsuite/gcc.dg/format/attr-6.c +++ b/gcc/testsuite/gcc.dg/format/attr-6.c @@ -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 } */ } diff --git a/gcc/testsuite/gcc.dg/redecl-5.c b/gcc/testsuite/gcc.dg/redecl-5.c new file mode 100644 index 0000000..a689295 --- /dev/null +++ b/gcc/testsuite/gcc.dg/redecl-5.c @@ -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" } */ +} |