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Add support for -Wimplicit-function-declaration, rdar://5907433

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llvm-svn: 50672
This commit is contained in:
Chris Lattner 2008-05-05 21:18:06 +00:00
parent 31ce28c561
commit 00e2607de2
2 changed files with 10 additions and 2 deletions
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7
clang/Driver/clang.cpp
View File

@ -475,6 +475,9 @@ static llvm::cl::opt<bool>
WarnUndefMacros("Wundef",
llvm::cl::desc("Warn on use of undefined macros in #if's"));
static llvm::cl::opt<bool>
WarnImplicitFunctionDeclaration("Wimplicit-function-declaration"
"Warn about use of implicitly defined functions");
/// InitializeDiagnostics - Initialize the diagnostic object, based on the
/// current command line option settings.
@ -498,6 +501,10 @@ static void InitializeDiagnostics(Diagnostic &Diags) {
if (!WarnUndefMacros)
Diags.setDiagnosticMapping(diag::warn_pp_undef_identifier,diag::MAP_IGNORE);
if (!WarnImplicitFunctionDeclaration)
Diags.setDiagnosticMapping(diag::warn_implicit_function_decl,
diag::MAP_IGNORE);
if (MSExtensions) // MS allows unnamed struct/union fields.
Diags.setDiagnosticMapping(diag::w_no_declarators, diag::MAP_IGNORE);

5
clang/lib/Sema/SemaDecl.cpp
View File

@ -1268,9 +1268,10 @@ Sema::DeclTy *Sema::ActOnFinishFunctionBody(DeclTy *D, StmtTy *Body) {
/// call, forming a call to an implicitly defined function (per C99 6.5.1p2).
ScopedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc,
IdentifierInfo &II, Scope *S) {
if (getLangOptions().C99) // Extension in C99.
// Extension in C99. Legal in C90, but warn about it.
if (getLangOptions().C99)
Diag(Loc, diag::ext_implicit_function_decl, II.getName());
else // Legal in C90, but warn about it.
else
Diag(Loc, diag::warn_implicit_function_decl, II.getName());
// FIXME: handle stuff like: