rsmith updated this revision to Diff 457742.
rsmith added a comment.
Document the flag to undo the behavior, and mention that it's going away.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D132779/new/
https://reviews.llvm.org/D132779
Files:
clang/docs/ReleaseNotes.rst
clang/include/clang/Basic/LangOptions.def
clang/include/clang/Driver/Options.td
clang/include/clang/Lex/Preprocessor.h
clang/lib/Lex/PPDirectives.cpp
clang/test/Modules/Inputs/declare-use/module.map
clang/test/Modules/Inputs/declare-use/textual.h
clang/test/Modules/declare-use-textual.cpp
Index: clang/test/Modules/declare-use-textual.cpp
===================================================================
--- /dev/null
+++ clang/test/Modules/declare-use-textual.cpp
@@ -0,0 +1,6 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fimplicit-module-maps -fmodules-cache-path=%t -fmodules-decluse -fmodule-name=Textual -I %S/Inputs/declare-use %s -verify
+// RUN: %clang_cc1 -fimplicit-module-maps -fmodules-cache-path=%t -fmodules-decluse -fmodule-name=Textual -I %S/Inputs/declare-use %s -fno-modules-validate-textual-header-includes
+
+// expected-error@textual.h:* {{module Textual does not depend on a module exporting 'a.h'}}
+#include "textual.h"
Index: clang/test/Modules/Inputs/declare-use/textual.h
===================================================================
--- /dev/null
+++ clang/test/Modules/Inputs/declare-use/textual.h
@@ -0,0 +1 @@
+#include "a.h"
Index: clang/test/Modules/Inputs/declare-use/module.map
===================================================================
--- clang/test/Modules/Inputs/declare-use/module.map
+++ clang/test/Modules/Inputs/declare-use/module.map
@@ -73,3 +73,7 @@
module XS {
}
+
+module Textual {
+ textual header "textual.h"
+}
Index: clang/lib/Lex/PPDirectives.cpp
===================================================================
--- clang/lib/Lex/PPDirectives.cpp
+++ clang/lib/Lex/PPDirectives.cpp
@@ -856,7 +856,8 @@
Tok.getLocation());
}
-Module *Preprocessor::getModuleForLocation(SourceLocation Loc) {
+Module *Preprocessor::getModuleForLocation(SourceLocation Loc,
+ bool AllowTextual) {
if (!SourceMgr.isInMainFile(Loc)) {
// Try to determine the module of the include directive.
// FIXME: Look into directly passing the FileEntry from LookupFile instead.
@@ -864,7 +865,7 @@
if (const FileEntry *EntryOfIncl = SourceMgr.getFileEntryForID(IDOfIncl)) {
// The include comes from an included file.
return HeaderInfo.getModuleMap()
- .findModuleForHeader(EntryOfIncl)
+ .findModuleForHeader(EntryOfIncl, AllowTextual)
.getModule();
}
}
@@ -879,7 +880,8 @@
const FileEntry *
Preprocessor::getHeaderToIncludeForDiagnostics(SourceLocation IncLoc,
SourceLocation Loc) {
- Module *IncM = getModuleForLocation(IncLoc);
+ Module *IncM = getModuleForLocation(
+ IncLoc, LangOpts.ModulesValidateTextualHeaderIncludes);
// Walk up through the include stack, looking through textual headers of M
// until we hit a non-textual header that we can #include. (We assume textual
@@ -953,7 +955,8 @@
ConstSearchDirIterator CurDirLocal = nullptr;
ConstSearchDirIterator &CurDir = CurDirArg ? *CurDirArg : CurDirLocal;
- Module *RequestingModule = getModuleForLocation(FilenameLoc);
+ Module *RequestingModule = getModuleForLocation(
+ FilenameLoc, LangOpts.ModulesValidateTextualHeaderIncludes);
bool RequestingModuleIsModuleInterface = !SourceMgr.isInMainFile(FilenameLoc);
// If the header lookup mechanism may be relative to the current inclusion
Index: clang/include/clang/Lex/Preprocessor.h
===================================================================
--- clang/include/clang/Lex/Preprocessor.h
+++ clang/include/clang/Lex/Preprocessor.h
@@ -2546,7 +2546,7 @@
/// Find the module that owns the source or header file that
/// \p Loc points to. If the location is in a file that was included
/// into a module, or is outside any module, returns nullptr.
- Module *getModuleForLocation(SourceLocation Loc);
+ Module *getModuleForLocation(SourceLocation Loc, bool AllowTextual);
/// We want to produce a diagnostic at location IncLoc concerning an
/// unreachable effect at location MLoc (eg, where a desired entity was
Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -2283,6 +2283,11 @@
HeaderSearchOpts<"ModulesValidateSystemHeaders">, DefaultFalse,
PosFlag<SetTrue, [CC1Option], "Validate the system headers that a module depends on when loading the module">,
NegFlag<SetFalse, [NoXarchOption]>>, Group<i_Group>;
+def fno_modules_validate_textual_header_includes :
+ Flag<["-"], "fno-modules-validate-textual-header-includes">,
+ Group<f_Group>, Flags<[CC1Option, NoXarchOption]>,
+ MarshallingInfoNegativeFlag<LangOpts<"ModulesValidateTextualHeaderIncludes">>,
+ HelpText<"Do not enforce -fmodules-decluse and private header restrictions for textual headers.">;
def fvalidate_ast_input_files_content:
Flag <["-"], "fvalidate-ast-input-files-content">,
Index: clang/include/clang/Basic/LangOptions.def
===================================================================
--- clang/include/clang/Basic/LangOptions.def
+++ clang/include/clang/Basic/LangOptions.def
@@ -181,6 +181,7 @@
COMPATIBLE_LANGOPT(ModulesDeclUse , 1, 0, "require declaration of module uses")
BENIGN_LANGOPT(ModulesSearchAll , 1, 1, "searching even non-imported modules to find unresolved references")
COMPATIBLE_LANGOPT(ModulesStrictDeclUse, 1, 0, "requiring declaration of module uses and all headers to be in modules")
+COMPATIBLE_LANGOPT(ModulesValidateTextualHeaderIncludes, 1, 1, "validation of textual header includes")
BENIGN_LANGOPT(ModulesErrorRecovery, 1, 1, "automatically importing modules as needed when performing error recovery")
BENIGN_LANGOPT(ImplicitModules, 1, 1, "building modules that are not specified via -fmodule-file")
COMPATIBLE_LANGOPT(ModulesLocalVisibility, 1, 0, "local submodule visibility")
Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -120,6 +120,13 @@
Non-comprehensive list of changes in this release
-------------------------------------------------
+- When using header modules, inclusion of a private header and violations of
+ the `use-declaration rules
+ <https://clang.llvm.org/docs/Modules.html#use-declaration>`_ are now
+ diagnosed even when the includer is a textual header. This change can be
+ temporarily reversed with ``-Xclang
+ -fno-modules-validate-textual-header-includes``, but this flag will be
+ removed in a future Clang release.
Non-comprehensive list of changes in this release
-------------------------------------------------
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