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-rw-r--r--clang/lib/Basic/Module.cpp7
-rw-r--r--clang/lib/Headers/__stddef_null.h2
-rw-r--r--clang/lib/Headers/__stddef_nullptr_t.h7
-rw-r--r--clang/lib/Headers/__stddef_offsetof.h7
-rw-r--r--clang/lib/Headers/__stddef_ptrdiff_t.h7
-rw-r--r--clang/lib/Headers/__stddef_rsize_t.h7
-rw-r--r--clang/lib/Headers/__stddef_size_t.h7
-rw-r--r--clang/lib/Headers/__stddef_unreachable.h7
-rw-r--r--clang/lib/Headers/__stddef_wchar_t.h7
-rw-r--r--clang/lib/Headers/module.modulemap20
-rw-r--r--clang/lib/Lex/ModuleMap.cpp9
11 files changed, 61 insertions, 26 deletions
diff --git a/clang/lib/Basic/Module.cpp b/clang/lib/Basic/Module.cpp
index 9f597dc..256365d 100644
--- a/clang/lib/Basic/Module.cpp
+++ b/clang/lib/Basic/Module.cpp
@@ -301,10 +301,9 @@ bool Module::directlyUses(const Module *Requested) {
if (Requested->isSubModuleOf(Use))
return true;
- // Anyone is allowed to use our builtin stdarg.h and stddef.h and their
- // accompanying modules.
- if (Requested->getTopLevelModuleName() == "_Builtin_stdarg" ||
- Requested->getTopLevelModuleName() == "_Builtin_stddef")
+ // Anyone is allowed to use our builtin stddef.h and its accompanying modules.
+ if (Requested->fullModuleNameIs({"_Builtin_stddef", "max_align_t"}) ||
+ Requested->fullModuleNameIs({"_Builtin_stddef_wint_t"}))
return true;
if (NoUndeclaredIncludes)
diff --git a/clang/lib/Headers/__stddef_null.h b/clang/lib/Headers/__stddef_null.h
index 7336fda..c10bd2d 100644
--- a/clang/lib/Headers/__stddef_null.h
+++ b/clang/lib/Headers/__stddef_null.h
@@ -7,7 +7,7 @@
*===-----------------------------------------------------------------------===
*/
-#if !defined(NULL) || !__has_feature(modules)
+#if !defined(NULL) || !__building_module(_Builtin_stddef)
/* linux/stddef.h will define NULL to 0. glibc (and other) headers then define
* __need_NULL and rely on stddef.h to redefine NULL to the correct value again.
diff --git a/clang/lib/Headers/__stddef_nullptr_t.h b/clang/lib/Headers/__stddef_nullptr_t.h
index 183d394..7f3fbe6 100644
--- a/clang/lib/Headers/__stddef_nullptr_t.h
+++ b/clang/lib/Headers/__stddef_nullptr_t.h
@@ -7,7 +7,12 @@
*===-----------------------------------------------------------------------===
*/
-#ifndef _NULLPTR_T
+/*
+ * When -fbuiltin-headers-in-system-modules is set this is a non-modular header
+ * and needs to behave as if it was textual.
+ */
+#if !defined(_NULLPTR_T) || \
+ (__has_feature(modules) && !__building_module(_Builtin_stddef))
#define _NULLPTR_T
#ifdef __cplusplus
diff --git a/clang/lib/Headers/__stddef_offsetof.h b/clang/lib/Headers/__stddef_offsetof.h
index 3b347b3..84172c6 100644
--- a/clang/lib/Headers/__stddef_offsetof.h
+++ b/clang/lib/Headers/__stddef_offsetof.h
@@ -7,6 +7,11 @@
*===-----------------------------------------------------------------------===
*/
-#ifndef offsetof
+/*
+ * When -fbuiltin-headers-in-system-modules is set this is a non-modular header
+ * and needs to behave as if it was textual.
+ */
+#if !defined(offsetof) || \
+ (__has_feature(modules) && !__building_module(_Builtin_stddef))
#define offsetof(t, d) __builtin_offsetof(t, d)
#endif
diff --git a/clang/lib/Headers/__stddef_ptrdiff_t.h b/clang/lib/Headers/__stddef_ptrdiff_t.h
index 3ea6d7d..fd3c893 100644
--- a/clang/lib/Headers/__stddef_ptrdiff_t.h
+++ b/clang/lib/Headers/__stddef_ptrdiff_t.h
@@ -7,7 +7,12 @@
*===-----------------------------------------------------------------------===
*/
-#ifndef _PTRDIFF_T
+/*
+ * When -fbuiltin-headers-in-system-modules is set this is a non-modular header
+ * and needs to behave as if it was textual.
+ */
+#if !defined(_PTRDIFF_T) || \
+ (__has_feature(modules) && !__building_module(_Builtin_stddef))
#define _PTRDIFF_T
typedef __PTRDIFF_TYPE__ ptrdiff_t;
diff --git a/clang/lib/Headers/__stddef_rsize_t.h b/clang/lib/Headers/__stddef_rsize_t.h
index b6428d0..dd433d4 100644
--- a/clang/lib/Headers/__stddef_rsize_t.h
+++ b/clang/lib/Headers/__stddef_rsize_t.h
@@ -7,7 +7,12 @@
*===-----------------------------------------------------------------------===
*/
-#ifndef _RSIZE_T
+/*
+ * When -fbuiltin-headers-in-system-modules is set this is a non-modular header
+ * and needs to behave as if it was textual.
+ */
+#if !defined(_RSIZE_T) || \
+ (__has_feature(modules) && !__building_module(_Builtin_stddef))
#define _RSIZE_T
typedef __SIZE_TYPE__ rsize_t;
diff --git a/clang/lib/Headers/__stddef_size_t.h b/clang/lib/Headers/__stddef_size_t.h
index e4a3895..3dd7b1f 100644
--- a/clang/lib/Headers/__stddef_size_t.h
+++ b/clang/lib/Headers/__stddef_size_t.h
@@ -7,7 +7,12 @@
*===-----------------------------------------------------------------------===
*/
-#ifndef _SIZE_T
+/*
+ * When -fbuiltin-headers-in-system-modules is set this is a non-modular header
+ * and needs to behave as if it was textual.
+ */
+#if !defined(_SIZE_T) || \
+ (__has_feature(modules) && !__building_module(_Builtin_stddef))
#define _SIZE_T
typedef __SIZE_TYPE__ size_t;
diff --git a/clang/lib/Headers/__stddef_unreachable.h b/clang/lib/Headers/__stddef_unreachable.h
index 3e7fe01..518580c 100644
--- a/clang/lib/Headers/__stddef_unreachable.h
+++ b/clang/lib/Headers/__stddef_unreachable.h
@@ -7,6 +7,11 @@
*===-----------------------------------------------------------------------===
*/
-#ifndef unreachable
+/*
+ * When -fbuiltin-headers-in-system-modules is set this is a non-modular header
+ * and needs to behave as if it was textual.
+ */
+#if !defined(unreachable) || \
+ (__has_feature(modules) && !__building_module(_Builtin_stddef))
#define unreachable() __builtin_unreachable()
#endif
diff --git a/clang/lib/Headers/__stddef_wchar_t.h b/clang/lib/Headers/__stddef_wchar_t.h
index 16a6186..bd69f63 100644
--- a/clang/lib/Headers/__stddef_wchar_t.h
+++ b/clang/lib/Headers/__stddef_wchar_t.h
@@ -9,7 +9,12 @@
#if !defined(__cplusplus) || (defined(_MSC_VER) && !_NATIVE_WCHAR_T_DEFINED)
-#ifndef _WCHAR_T
+/*
+ * When -fbuiltin-headers-in-system-modules is set this is a non-modular header
+ * and needs to behave as if it was textual.
+ */
+#if !defined(_WCHAR_T) || \
+ (__has_feature(modules) && !__building_module(_Builtin_stddef))
#define _WCHAR_T
#ifdef _MSC_EXTENSIONS
diff --git a/clang/lib/Headers/module.modulemap b/clang/lib/Headers/module.modulemap
index a786689..56a13f6 100644
--- a/clang/lib/Headers/module.modulemap
+++ b/clang/lib/Headers/module.modulemap
@@ -155,9 +155,9 @@ module _Builtin_intrinsics [system] [extern_c] {
// Start -fbuiltin-headers-in-system-modules affected modules
-// The following modules all ignore their top level headers
-// when -fbuiltin-headers-in-system-modules is passed, and
-// most of those headers join system modules when present.
+// The following modules all ignore their headers when
+// -fbuiltin-headers-in-system-modules is passed, and many of
+// those headers join system modules when present.
// e.g. if -fbuiltin-headers-in-system-modules is passed, then
// float.h will not be in the _Builtin_float module (that module
@@ -190,11 +190,6 @@ module _Builtin_stdalign [system] {
export *
}
-// When -fbuiltin-headers-in-system-modules is passed, only
-// the top level headers are removed, the implementation headers
-// will always be in their submodules. That means when stdarg.h
-// is included, it will still import this module and make the
-// appropriate submodules visible.
module _Builtin_stdarg [system] {
textual header "stdarg.h"
@@ -237,6 +232,8 @@ module _Builtin_stdbool [system] {
module _Builtin_stddef [system] {
textual header "stddef.h"
+ // __stddef_max_align_t.h is always in this module, even if
+ // -fbuiltin-headers-in-system-modules is passed.
explicit module max_align_t {
header "__stddef_max_align_t.h"
export *
@@ -283,9 +280,10 @@ module _Builtin_stddef [system] {
}
}
-/* wint_t is provided by <wchar.h> and not <stddef.h>. It's here
- * for compatibility, but must be explicitly requested. Therefore
- * __stddef_wint_t.h is not part of _Builtin_stddef. */
+// wint_t is provided by <wchar.h> and not <stddef.h>. It's here
+// for compatibility, but must be explicitly requested. Therefore
+// __stddef_wint_t.h is not part of _Builtin_stddef. It is always in
+// this module even if -fbuiltin-headers-in-system-modules is passed.
module _Builtin_stddef_wint_t [system] {
header "__stddef_wint_t.h"
export *
diff --git a/clang/lib/Lex/ModuleMap.cpp b/clang/lib/Lex/ModuleMap.cpp
index afb2948..10c475f 100644
--- a/clang/lib/Lex/ModuleMap.cpp
+++ b/clang/lib/Lex/ModuleMap.cpp
@@ -2498,9 +2498,12 @@ void ModuleMapParser::parseHeaderDecl(MMToken::TokenKind LeadingToken,
}
bool NeedsFramework = false;
- // Don't add the top level headers to the builtin modules if the builtin headers
- // belong to the system modules.
- if (!Map.LangOpts.BuiltinHeadersInSystemModules || ActiveModule->isSubModule() || !isBuiltInModuleName(ActiveModule->Name))
+ // Don't add headers to the builtin modules if the builtin headers belong to
+ // the system modules, with the exception of __stddef_max_align_t.h which
+ // always had its own module.
+ if (!Map.LangOpts.BuiltinHeadersInSystemModules ||
+ !isBuiltInModuleName(ActiveModule->getTopLevelModuleName()) ||
+ ActiveModule->fullModuleNameIs({"_Builtin_stddef", "max_align_t"}))
Map.addUnresolvedHeader(ActiveModule, std::move(Header), NeedsFramework);
if (NeedsFramework)
generated by cgit v1.1 at 2025-08-02 11:36:29 +0000