aaronpuchert updated this revision to Diff 202480.
aaronpuchert added a comment.
Remove other change from this one.
Repository:
rC Clang
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D59402/new/
https://reviews.llvm.org/D59402
Files:
include/clang/Basic/DiagnosticSemaKinds.td
lib/Sema/SemaDecl.cpp
test/Sema/warn-missing-prototypes.c
test/Sema/warn-missing-variable-declarations.c
test/SemaCXX/warn-missing-prototypes.cpp
test/SemaCXX/warn-missing-variable-declarations.cpp
test/SemaOpenCL/warn-missing-prototypes.cl
Index: test/SemaOpenCL/warn-missing-prototypes.cl
===================================================================
--- test/SemaOpenCL/warn-missing-prototypes.cl
+++ test/SemaOpenCL/warn-missing-prototypes.cl
@@ -1,6 +1,7 @@
// RUN: %clang_cc1 -fsyntax-only -verify -Wmissing-prototypes %s
void f() { } // expected-warning {{no previous prototype for function 'f'}}
+// expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
// Don't warn about kernel functions.
kernel void g() { }
Index: test/SemaCXX/warn-missing-variable-declarations.cpp
===================================================================
--- test/SemaCXX/warn-missing-variable-declarations.cpp
+++ test/SemaCXX/warn-missing-variable-declarations.cpp
@@ -1,11 +1,15 @@
-// RUN: %clang -Wmissing-variable-declarations -fsyntax-only -Xclang -verify -std=c++17 %s
+// RUN: %clang_cc1 -fsyntax-only -verify -Wmissing-variable-declarations -std=c++17 %s
// Variable declarations that should trigger a warning.
int vbad1; // expected-warning{{no previous extern declaration for non-static variable 'vbad1'}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
+
int vbad2 = 10; // expected-warning{{no previous extern declaration for non-static variable 'vbad2'}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
namespace x {
int vbad3; // expected-warning{{no previous extern declaration for non-static variable 'vbad3'}}
+ // expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
}
// Variable declarations that should not trigger a warning.
@@ -58,7 +62,9 @@
constexpr int constexpr_var = 0;
inline constexpr int inline_constexpr_var = 0;
extern const int extern_const_var = 0; // expected-warning {{no previous extern declaration}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
extern constexpr int extern_constexpr_var = 0; // expected-warning {{no previous extern declaration}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
template<typename> int var_template = 0;
template<typename> constexpr int const_var_template = 0;
@@ -69,7 +75,9 @@
template int var_template<int[3]>;
extern template int var_template<int[4]>;
template<> int var_template<int[5]>; // expected-warning {{no previous extern declaration}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
// FIXME: We give this specialization internal linkage rather than inheriting
// the linkage from the template! We should not warn here.
template<> int static_var_template<int[5]>; // expected-warning {{no previous extern declaration}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
Index: test/SemaCXX/warn-missing-prototypes.cpp
===================================================================
--- test/SemaCXX/warn-missing-prototypes.cpp
+++ test/SemaCXX/warn-missing-prototypes.cpp
@@ -1,9 +1,13 @@
// RUN: %clang_cc1 -fsyntax-only -verify -Wmissing-prototypes -std=c++11 %s
+// RUN: %clang_cc1 -fsyntax-only -Wmissing-prototypes -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
void f() { } // expected-warning {{no previous prototype for function 'f'}}
+// expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
+// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:1-[[@LINE-2]]:1}:"static "
namespace NS {
void f() { } // expected-warning {{no previous prototype for function 'f'}}
+ // expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
}
namespace {
@@ -32,3 +36,6 @@
// Don't warn on explicitly deleted functions.
void j() = delete;
+
+extern void k() {} // expected-warning {{no previous prototype for function 'k'}}
+// expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
Index: test/Sema/warn-missing-variable-declarations.c
===================================================================
--- test/Sema/warn-missing-variable-declarations.c
+++ test/Sema/warn-missing-variable-declarations.c
@@ -1,16 +1,19 @@
// RUN: %clang_cc1 -Wmissing-variable-declarations -fsyntax-only -verify %s
int vbad1; // expected-warning{{no previous extern declaration for non-static variable 'vbad1'}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
int vbad2;
int vbad2 = 10; // expected-warning{{no previous extern declaration for non-static variable 'vbad2'}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
-struct {
+struct { // expected-note{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
int mgood1;
} vbad3; // expected-warning{{no previous extern declaration for non-static variable 'vbad3'}}
int vbad4;
int vbad4 = 10; // expected-warning{{no previous extern declaration for non-static variable 'vbad4'}}
+// expected-note@-1{{declare 'static' if the variable is not intended to be used outside of this translation unit}}
extern int vbad4;
extern int vgood1;
Index: test/Sema/warn-missing-prototypes.c
===================================================================
--- test/Sema/warn-missing-prototypes.c
+++ test/Sema/warn-missing-prototypes.c
@@ -8,11 +8,16 @@
static int g(int x) { return x; }
int h(int x) { return x; } // expected-warning{{no previous prototype for function 'h'}}
+// expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
+// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:1-[[@LINE-2]]:1}:"static "
static int g2();
int g2(int x) { return x; }
+extern int g3(int x) { return x; } // expected-warning{{no previous prototype for function 'g3'}}
+// expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
+
void test(void);
int h3(); // expected-note{{this declaration is not a prototype; add parameter declarations to make it one}}
@@ -26,6 +31,7 @@
}
int h2(int x) { return x; } // expected-warning{{no previous prototype for function 'h2'}}
+// expected-note@-1{{declare 'static' if the function is not intended to be used outside of this translation unit}}
int h3(int x) { return x; } // expected-warning{{no previous prototype for function 'h3'}}
int h4(int x) { return x; }
@@ -40,4 +46,4 @@
void not_a_prototype_test(); // expected-note{{this declaration is not a prototype; add 'void' to make it a prototype for a zero-parameter function}}
void not_a_prototype_test() { } // expected-warning{{no previous prototype for function 'not_a_prototype_test'}}
-// CHECK: fix-it:"{{.*}}":{40:27-40:27}:"void"
+// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:27-[[@LINE-3]]:27}:"void"
Index: lib/Sema/SemaDecl.cpp
===================================================================
--- lib/Sema/SemaDecl.cpp
+++ lib/Sema/SemaDecl.cpp
@@ -11887,8 +11887,11 @@
while (prev && prev->isThisDeclarationADefinition())
prev = prev->getPreviousDecl();
- if (!prev)
+ if (!prev) {
Diag(var->getLocation(), diag::warn_missing_variable_declarations) << var;
+ Diag(var->getTypeSpecStartLoc(), diag::note_static_for_internal_linkage)
+ << /* variable */ 0;
+ }
}
// Cache the result of checking for constant initialization.
@@ -13335,6 +13338,13 @@
: FixItHint{});
}
}
+ else
+ Diag(FD->getTypeSpecStartLoc(), diag::note_static_for_internal_linkage)
+ << /*function*/ 1
+ << (FD->getStorageClass() == SC_None
+ ? FixItHint::CreateInsertion(FD->getTypeSpecStartLoc(),
+ "static ")
+ : FixItHint{});
// GNU warning -Wstrict-prototypes
// Warn if K&R function is defined without a previous declaration.
Index: include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- include/clang/Basic/DiagnosticSemaKinds.td
+++ include/clang/Basic/DiagnosticSemaKinds.td
@@ -4661,6 +4661,9 @@
def warn_missing_variable_declarations : Warning<
"no previous extern declaration for non-static variable %0">,
InGroup<DiagGroup<"missing-variable-declarations">>, DefaultIgnore;
+def note_static_for_internal_linkage : Note<
+ "declare 'static' if the %select{variable|function}0 is not intended to be "
+ "used outside of this translation unit">;
def err_static_data_member_reinitialization :
Error<"static data member %0 already has an initializer">;
def err_redefinition : Error<"redefinition of %0">;
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