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[clang][headers] Need a way for math.h to share the definitions of INIFINITY and NAN with float.h (#164348)

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In C23 mode, both float.h and math.h are required to define INIFINITY
and NAN. However, with clang modules, there needs to be a single owner
for the declarations. Let that be float.h since that's the suggested
true owner in Annex F.2.2 of ISO/IEC 9899:2024, and introduce
`__need_infinity_nan` so that math.h can pick up the compiler
definitions.
This commit is contained in:
Ian Anderson 2025-10-23 10:15:00 -07:00 committed by GitHub
parent 1ab6c0d60c
commit 38473c5d35
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
11 changed files with 294 additions and 166 deletions
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3
clang-tools-extra/clang-include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp
View File

@ -13,6 +13,9 @@ namespace find_all_symbols {
const HeaderMapCollector::RegexHeaderMap *getSTLPostfixHeaderMap() {
static const HeaderMapCollector::RegexHeaderMap STLPostfixHeaderMap = {
{"include/__float_float.h$", "<cfloat>"},
{"include/__float_header_macro.h$", "<cfloat>"},
{"include/__float_infinity_nan.h$", "<cfloat>"},
{"include/__stdarg___gnuc_va_list.h$", "<cstdarg>"},
{"include/__stdarg___va_copy.h$", "<cstdarg>"},
{"include/__stdarg_header_macro.h$", "<cstdarg>"},

3
clang-tools-extra/clangd/index/CanonicalIncludes.cpp
View File

@ -16,6 +16,9 @@ namespace clang {
namespace clangd {
namespace {
const std::pair<llvm::StringRef, llvm::StringRef> IncludeMappings[] = {
{"include/__float_float.h", "<cfloat>"},
{"include/__float_header_macro.h", "<cfloat>"},
{"include/__float_infinity_nan.h", "<cfloat>"},
{"include/__stdarg___gnuc_va_list.h", "<cstdarg>"},
{"include/__stdarg___va_copy.h", "<cstdarg>"},
{"include/__stdarg_header_macro.h", "<cstdarg>"},

3
clang/lib/Headers/CMakeLists.txt
View File

@ -4,6 +4,9 @@
set(core_files
builtins.h
float.h
__float_float.h
__float_header_macro.h
__float_infinity_nan.h
inttypes.h
iso646.h
limits.h

176
clang/lib/Headers/__float_float.h Normal file
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@ -0,0 +1,176 @@
/*===---- __float_float.h --------------------------------------------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
*===-----------------------------------------------------------------------===
*/
#ifndef __CLANG_FLOAT_FLOAT_H
#define __CLANG_FLOAT_FLOAT_H
#if (defined(__MINGW32__) || defined(_MSC_VER) || defined(_AIX)) && \
__STDC_HOSTED__
/* Undefine anything that we'll be redefining below. */
# undef FLT_EVAL_METHOD
# undef FLT_ROUNDS
# undef FLT_RADIX
# undef FLT_MANT_DIG
# undef DBL_MANT_DIG
# undef LDBL_MANT_DIG
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201103L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# undef DECIMAL_DIG
# endif
# undef FLT_DIG
# undef DBL_DIG
# undef LDBL_DIG
# undef FLT_MIN_EXP
# undef DBL_MIN_EXP
# undef LDBL_MIN_EXP
# undef FLT_MIN_10_EXP
# undef DBL_MIN_10_EXP
# undef LDBL_MIN_10_EXP
# undef FLT_MAX_EXP
# undef DBL_MAX_EXP
# undef LDBL_MAX_EXP
# undef FLT_MAX_10_EXP
# undef DBL_MAX_10_EXP
# undef LDBL_MAX_10_EXP
# undef FLT_MAX
# undef DBL_MAX
# undef LDBL_MAX
# undef FLT_EPSILON
# undef DBL_EPSILON
# undef LDBL_EPSILON
# undef FLT_MIN
# undef DBL_MIN
# undef LDBL_MIN
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201703L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# undef FLT_TRUE_MIN
# undef DBL_TRUE_MIN
# undef LDBL_TRUE_MIN
# undef FLT_DECIMAL_DIG
# undef DBL_DECIMAL_DIG
# undef LDBL_DECIMAL_DIG
# undef FLT_HAS_SUBNORM
# undef DBL_HAS_SUBNORM
# undef LDBL_HAS_SUBNORM
# endif
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
!defined(__STRICT_ANSI__)
# undef FLT_NORM_MAX
# undef DBL_NORM_MAX
# undef LDBL_NORM_MAX
#endif
#endif
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
!defined(__STRICT_ANSI__)
# undef FLT_SNAN
# undef DBL_SNAN
# undef LDBL_SNAN
#endif
/* Characteristics of floating point types, C99 5.2.4.2.2 */
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
(defined(__cplusplus) && __cplusplus >= 201103L)
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#endif
#define FLT_ROUNDS (__builtin_flt_rounds())
#define FLT_RADIX __FLT_RADIX__
#define FLT_MANT_DIG __FLT_MANT_DIG__
#define DBL_MANT_DIG __DBL_MANT_DIG__
#define LDBL_MANT_DIG __LDBL_MANT_DIG__
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201103L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# define DECIMAL_DIG __DECIMAL_DIG__
#endif
#define FLT_DIG __FLT_DIG__
#define DBL_DIG __DBL_DIG__
#define LDBL_DIG __LDBL_DIG__
#define FLT_MIN_EXP __FLT_MIN_EXP__
#define DBL_MIN_EXP __DBL_MIN_EXP__
#define LDBL_MIN_EXP __LDBL_MIN_EXP__
#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
#define FLT_MAX_EXP __FLT_MAX_EXP__
#define DBL_MAX_EXP __DBL_MAX_EXP__
#define LDBL_MAX_EXP __LDBL_MAX_EXP__
#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
#define FLT_MAX __FLT_MAX__
#define DBL_MAX __DBL_MAX__
#define LDBL_MAX __LDBL_MAX__
#define FLT_EPSILON __FLT_EPSILON__
#define DBL_EPSILON __DBL_EPSILON__
#define LDBL_EPSILON __LDBL_EPSILON__
#define FLT_MIN __FLT_MIN__
#define DBL_MIN __DBL_MIN__
#define LDBL_MIN __LDBL_MIN__
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201703L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# define FLT_TRUE_MIN __FLT_DENORM_MIN__
# define DBL_TRUE_MIN __DBL_DENORM_MIN__
# define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
# define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__
# define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__
# define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__
# define FLT_HAS_SUBNORM __FLT_HAS_DENORM__
# define DBL_HAS_SUBNORM __DBL_HAS_DENORM__
# define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__
#endif
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
!defined(__STRICT_ANSI__)
/* C23 5.2.5.3.2p28 */
# define FLT_SNAN (__builtin_nansf(""))
# define DBL_SNAN (__builtin_nans(""))
# define LDBL_SNAN (__builtin_nansl(""))
/* C23 5.2.5.3.3p32 */
# define FLT_NORM_MAX __FLT_NORM_MAX__
# define DBL_NORM_MAX __DBL_NORM_MAX__
# define LDBL_NORM_MAX __LDBL_NORM_MAX__
#endif
#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
# define FLT16_MANT_DIG __FLT16_MANT_DIG__
# define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__
# define FLT16_DIG __FLT16_DIG__
# define FLT16_MIN_EXP __FLT16_MIN_EXP__
# define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__
# define FLT16_MAX_EXP __FLT16_MAX_EXP__
# define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__
# define FLT16_MAX __FLT16_MAX__
# define FLT16_EPSILON __FLT16_EPSILON__
# define FLT16_MIN __FLT16_MIN__
# define FLT16_TRUE_MIN __FLT16_TRUE_MIN__
#endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */
#endif /* __CLANG_FLOAT_FLOAT_H */

12
clang/lib/Headers/__float_header_macro.h Normal file
View File

@ -0,0 +1,12 @@
/*===---- __float_header_macro.h -------------------------------------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
*===-----------------------------------------------------------------------===
*/
#ifndef __CLANG_FLOAT_H
#define __CLANG_FLOAT_H
#endif /* __CLANG_FLOAT_H */

20
clang/lib/Headers/__float_infinity_nan.h Normal file
View File

@ -0,0 +1,20 @@
/*===---- __float_infinity_nan.h -------------------------------------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
*===-----------------------------------------------------------------------===
*/
#ifndef __CLANG_FLOAT_INFINITY_NAN_H
#define __CLANG_FLOAT_INFINITY_NAN_H
/* C23 5.2.5.3.3p29-30 */
#undef INFINITY
#undef NAN
#define INFINITY (__builtin_inff())
#define NAN (__builtin_nanf(""))
#endif /* __CLANG_FLOAT_INFINITY_NAN_H */

180
clang/lib/Headers/float.h
View File

@ -7,13 +7,21 @@
*===-----------------------------------------------------------------------===
*/
#ifndef __CLANG_FLOAT_H
#define __CLANG_FLOAT_H
#if defined(__MVS__) && __has_include_next(<float.h>)
#include <__float_header_macro.h>
#include_next <float.h>
#else
#if !defined(__need_infinity_nan)
#define __need_float_float
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
!defined(__STRICT_ANSI__)
#define __need_infinity_nan
#endif
#include <__float_header_macro.h>
#endif
#ifdef __need_float_float
/* If we're on MinGW, fall back to the system's float.h, which might have
* additional definitions provided for Windows.
* For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
@ -26,171 +34,15 @@
# include_next <float.h>
/* Undefine anything that we'll be redefining below. */
# undef FLT_EVAL_METHOD
# undef FLT_ROUNDS
# undef FLT_RADIX
# undef FLT_MANT_DIG
# undef DBL_MANT_DIG
# undef LDBL_MANT_DIG
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201103L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# undef DECIMAL_DIG
# endif
# undef FLT_DIG
# undef DBL_DIG
# undef LDBL_DIG
# undef FLT_MIN_EXP
# undef DBL_MIN_EXP
# undef LDBL_MIN_EXP
# undef FLT_MIN_10_EXP
# undef DBL_MIN_10_EXP
# undef LDBL_MIN_10_EXP
# undef FLT_MAX_EXP
# undef DBL_MAX_EXP
# undef LDBL_MAX_EXP
# undef FLT_MAX_10_EXP
# undef DBL_MAX_10_EXP
# undef LDBL_MAX_10_EXP
# undef FLT_MAX
# undef DBL_MAX
# undef LDBL_MAX
# undef FLT_EPSILON
# undef DBL_EPSILON
# undef LDBL_EPSILON
# undef FLT_MIN
# undef DBL_MIN
# undef LDBL_MIN
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201703L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# undef FLT_TRUE_MIN
# undef DBL_TRUE_MIN
# undef LDBL_TRUE_MIN
# undef FLT_DECIMAL_DIG
# undef DBL_DECIMAL_DIG
# undef LDBL_DECIMAL_DIG
# undef FLT_HAS_SUBNORM
# undef DBL_HAS_SUBNORM
# undef LDBL_HAS_SUBNORM
# endif
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
!defined(__STRICT_ANSI__)
# undef FLT_NORM_MAX
# undef DBL_NORM_MAX
# undef LDBL_NORM_MAX
#endif
#endif
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
!defined(__STRICT_ANSI__)
# undef INFINITY
# undef NAN
# undef FLT_SNAN
# undef DBL_SNAN
# undef LDBL_SNAN
#include <__float_float.h>
#undef __need_float_float
#endif
/* Characteristics of floating point types, C99 5.2.4.2.2 */
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
(defined(__cplusplus) && __cplusplus >= 201103L)
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#ifdef __need_infinity_nan
#include <__float_infinity_nan.h>
#undef __need_infinity_nan
#endif
#define FLT_ROUNDS (__builtin_flt_rounds())
#define FLT_RADIX __FLT_RADIX__
#define FLT_MANT_DIG __FLT_MANT_DIG__
#define DBL_MANT_DIG __DBL_MANT_DIG__
#define LDBL_MANT_DIG __LDBL_MANT_DIG__
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201103L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# define DECIMAL_DIG __DECIMAL_DIG__
#endif
#define FLT_DIG __FLT_DIG__
#define DBL_DIG __DBL_DIG__
#define LDBL_DIG __LDBL_DIG__
#define FLT_MIN_EXP __FLT_MIN_EXP__
#define DBL_MIN_EXP __DBL_MIN_EXP__
#define LDBL_MIN_EXP __LDBL_MIN_EXP__
#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
#define FLT_MAX_EXP __FLT_MAX_EXP__
#define DBL_MAX_EXP __DBL_MAX_EXP__
#define LDBL_MAX_EXP __LDBL_MAX_EXP__
#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
#define FLT_MAX __FLT_MAX__
#define DBL_MAX __DBL_MAX__
#define LDBL_MAX __LDBL_MAX__
#define FLT_EPSILON __FLT_EPSILON__
#define DBL_EPSILON __DBL_EPSILON__
#define LDBL_EPSILON __LDBL_EPSILON__
#define FLT_MIN __FLT_MIN__
#define DBL_MIN __DBL_MIN__
#define LDBL_MIN __LDBL_MIN__
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
!defined(__STRICT_ANSI__) || \
(defined(__cplusplus) && __cplusplus >= 201703L) || \
(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
# define FLT_TRUE_MIN __FLT_DENORM_MIN__
# define DBL_TRUE_MIN __DBL_DENORM_MIN__
# define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
# define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__
# define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__
# define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__
# define FLT_HAS_SUBNORM __FLT_HAS_DENORM__
# define DBL_HAS_SUBNORM __DBL_HAS_DENORM__
# define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__
#endif
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
!defined(__STRICT_ANSI__)
/* C23 5.2.5.3.2p28 */
# define FLT_SNAN (__builtin_nansf(""))
# define DBL_SNAN (__builtin_nans(""))
# define LDBL_SNAN (__builtin_nansl(""))
/* C23 5.2.5.3.3p29-30 */
# define INFINITY (__builtin_inff())
# define NAN (__builtin_nanf(""))
/* C23 5.2.5.3.3p32 */
# define FLT_NORM_MAX __FLT_NORM_MAX__
# define DBL_NORM_MAX __DBL_NORM_MAX__
# define LDBL_NORM_MAX __LDBL_NORM_MAX__
#endif
#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
# define FLT16_MANT_DIG __FLT16_MANT_DIG__
# define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__
# define FLT16_DIG __FLT16_DIG__
# define FLT16_MIN_EXP __FLT16_MIN_EXP__
# define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__
# define FLT16_MAX_EXP __FLT16_MAX_EXP__
# define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__
# define FLT16_MAX __FLT16_MAX__
# define FLT16_EPSILON __FLT16_EPSILON__
# define FLT16_MIN __FLT16_MIN__
# define FLT16_TRUE_MIN __FLT16_TRUE_MIN__
#endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */
#endif /* __MVS__ */
#endif /* __CLANG_FLOAT_H */

18
clang/lib/Headers/module.modulemap
View File

@ -171,8 +171,22 @@ module _Builtin_intrinsics [system] [extern_c] {
// that module. The system float.h (if present) will be treated
// as a textual header in the sytem module.
module _Builtin_float [system] {
header "float.h"
export *
textual header "float.h"
explicit module float {
header "__float_float.h"
export *
}
explicit module header_macro {
header "__float_header_macro.h"
export *
}
explicit module infinity_nan {
header "__float_infinity_nan.h"
export *
}
}
module _Builtin_inttypes [system] {

41
clang/test/Headers/floatneeds.c Normal file
View File

@ -0,0 +1,41 @@
// RUN: rm -fR %t
// RUN: split-file %s %t
// RUN: %clang_cc1 -fsyntax-only -verify=c99 -std=c99 %t/floatneeds0.c
// RUN: %clang_cc1 -fsyntax-only -verify=c99 -std=c99 %t/floatneeds1.c
// RUN: %clang_cc1 -fsyntax-only -verify=c23 -std=c23 %t/floatneeds0.c
// RUN: %clang_cc1 -fsyntax-only -verify=c23 -std=c23 %t/floatneeds1.c
// RUN: %clang_cc1 -fsyntax-only -verify=c99-modules -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -std=c99 %t/floatneeds0.c
// RUN: %clang_cc1 -fsyntax-only -verify=c99-modules -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -std=c99 %t/floatneeds1.c
// RUN: %clang_cc1 -fsyntax-only -verify=c23-modules -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -std=c23 %t/floatneeds0.c
// RUN: %clang_cc1 -fsyntax-only -verify=c23-modules -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -std=c23 %t/floatneeds1.c
// Use C99 to verify that __need_ can be used to get types that wouldn't normally be available.
//--- floatneeds0.c
float infinity0 = INFINITY; // c99-error{{undeclared identifier 'INFINITY'}} c23-error{{undeclared identifier 'INFINITY'}} \
c99-modules-error{{undeclared identifier 'INFINITY'}} c23-modules-error{{undeclared identifier 'INFINITY'}}
float nan0 = NAN; // c99-error{{undeclared identifier 'NAN'}} c23-error{{undeclared identifier 'NAN'}} \
c99-modules-error{{undeclared identifier 'NAN'}} c23-modules-error{{undeclared identifier 'NAN'}}
float max0 = FLT_MAX; // c99-error{{undeclared identifier 'FLT_MAX'}} c23-error{{undeclared identifier 'FLT_MAX'}} \
c99-modules-error{{undeclared identifier 'FLT_MAX'}} c23-modules-error{{undeclared identifier 'FLT_MAX'}}
#define __need_infinity_nan
#include <float.h>
float infinity1 = INFINITY;
float nan1 = NAN;
float max1 = FLT_MAX; // c99-error{{undeclared identifier}} c23-error{{undeclared identifier}} \
c99-modules-error{{undeclared identifier}} c23-modules-error{{undeclared identifier}}
#include <float.h>
float infinity2 = INFINITY;
float nan2 = NAN;
float max2 = FLT_MAX;
//--- floatneeds1.c
// c23-no-diagnostics
// c23-modules-no-diagnostics
#include <float.h>
float infinity0 = INFINITY; // c99-error{{undeclared identifier}} c99-modules-error{{undeclared identifier}}
float nan0 = NAN; // c99-error{{undeclared identifier}} c99-modules-error{{undeclared identifier}}
float max0 = FLT_MAX;

1
clang/test/Modules/relative-resource-dir.m
View File

@ -8,5 +8,6 @@
// RUN: -fimplicit-module-maps -fmodules-cache-path=%t.mcp \
// RUN: -fbuiltin-headers-in-system-modules \
// RUN: -resource-dir resource-dir \
// RUN: -internal-isystem resource-dir/include \
// RUN: -emit-module %S/Inputs/builtin-headers/module.modulemap \
// RUN: -fmodule-name=ModuleWithBuiltinHeader -o %t.pcm

3
llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn
View File

@ -104,6 +104,9 @@ copy("Headers") {
"__clang_hip_runtime_wrapper.h",
"__clang_hip_stdlib.h",
"__clang_spirv_builtins.h",
"__float_float.h",
"__float_header_macro.h",
"__float_infinity_nan.h",
"__stdarg___gnuc_va_list.h",
"__stdarg___va_copy.h",
"__stdarg_header_macro.h",