diff --git a/lib/libc/glibc/include/features.h b/lib/libc/glibc/include/features.h
deleted file mode 100644
index 050085877b..0000000000
--- a/lib/libc/glibc/include/features.h
+++ /dev/null
@@ -1,515 +0,0 @@
-/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- . */
-
-#ifndef _FEATURES_H
-#define _FEATURES_H 1
-
-/* These are defined by the user (or the compiler)
- to specify the desired environment:
-
- __STRICT_ANSI__ ISO Standard C.
- _ISOC99_SOURCE Extensions to ISO C89 from ISO C99.
- _ISOC11_SOURCE Extensions to ISO C99 from ISO C11.
- _ISOC2X_SOURCE Extensions to ISO C99 from ISO C2X.
- __STDC_WANT_LIB_EXT2__
- Extensions to ISO C99 from TR 27431-2:2010.
- __STDC_WANT_IEC_60559_BFP_EXT__
- Extensions to ISO C11 from TS 18661-1:2014.
- __STDC_WANT_IEC_60559_FUNCS_EXT__
- Extensions to ISO C11 from TS 18661-4:2015.
- __STDC_WANT_IEC_60559_TYPES_EXT__
- Extensions to ISO C11 from TS 18661-3:2015.
- __STDC_WANT_IEC_60559_EXT__
- ISO C2X interfaces defined only in Annex F.
-
- _POSIX_SOURCE IEEE Std 1003.1.
- _POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
- if >=199309L, add IEEE Std 1003.1b-1993;
- if >=199506L, add IEEE Std 1003.1c-1995;
- if >=200112L, all of IEEE 1003.1-2004
- if >=200809L, all of IEEE 1003.1-2008
- _XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if
- Single Unix conformance is wanted, to 600 for the
- sixth revision, to 700 for the seventh revision.
- _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
- _LARGEFILE_SOURCE Some more functions for correct standard I/O.
- _LARGEFILE64_SOURCE Additional functionality from LFS for large files.
- _FILE_OFFSET_BITS=N Select default filesystem interface.
- _ATFILE_SOURCE Additional *at interfaces.
- _DYNAMIC_STACK_SIZE_SOURCE Select correct (but non compile-time constant)
- MINSIGSTKSZ, SIGSTKSZ and PTHREAD_STACK_MIN.
- _GNU_SOURCE All of the above, plus GNU extensions.
- _DEFAULT_SOURCE The default set of features (taking precedence over
- __STRICT_ANSI__).
-
- _FORTIFY_SOURCE Add security hardening to many library functions.
- Set to 1 or 2; 2 performs stricter checks than 1.
-
- _REENTRANT, _THREAD_SAFE
- Obsolete; equivalent to _POSIX_C_SOURCE=199506L.
-
- The `-ansi' switch to the GNU C compiler, and standards conformance
- options such as `-std=c99', define __STRICT_ANSI__. If none of
- these are defined, or if _DEFAULT_SOURCE is defined, the default is
- to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
- 200809L, as well as enabling miscellaneous functions from BSD and
- SVID. If more than one of these are defined, they accumulate. For
- example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
- give you ISO C, 1003.1, and 1003.2, but nothing else.
-
- These are defined by this file and are used by the
- header files to decide what to declare or define:
-
- __GLIBC_USE (F) Define things from feature set F. This is defined
- to 1 or 0; the subsequent macros are either defined
- or undefined, and those tests should be moved to
- __GLIBC_USE.
- __USE_ISOC11 Define ISO C11 things.
- __USE_ISOC99 Define ISO C99 things.
- __USE_ISOC95 Define ISO C90 AMD1 (C95) things.
- __USE_ISOCXX11 Define ISO C++11 things.
- __USE_POSIX Define IEEE Std 1003.1 things.
- __USE_POSIX2 Define IEEE Std 1003.2 things.
- __USE_POSIX199309 Define IEEE Std 1003.1, and .1b things.
- __USE_POSIX199506 Define IEEE Std 1003.1, .1b, .1c and .1i things.
- __USE_XOPEN Define XPG things.
- __USE_XOPEN_EXTENDED Define X/Open Unix things.
- __USE_UNIX98 Define Single Unix V2 things.
- __USE_XOPEN2K Define XPG6 things.
- __USE_XOPEN2KXSI Define XPG6 XSI things.
- __USE_XOPEN2K8 Define XPG7 things.
- __USE_XOPEN2K8XSI Define XPG7 XSI things.
- __USE_LARGEFILE Define correct standard I/O things.
- __USE_LARGEFILE64 Define LFS things with separate names.
- __USE_FILE_OFFSET64 Define 64bit interface as default.
- __USE_MISC Define things from 4.3BSD or System V Unix.
- __USE_ATFILE Define *at interfaces and AT_* constants for them.
- __USE_DYNAMIC_STACK_SIZE Define correct (but non compile-time constant)
- MINSIGSTKSZ, SIGSTKSZ and PTHREAD_STACK_MIN.
- __USE_GNU Define GNU extensions.
- __USE_FORTIFY_LEVEL Additional security measures used, according to level.
-
- The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
- defined by this file unconditionally. `__GNU_LIBRARY__' is provided
- only for compatibility. All new code should use the other symbols
- to test for features.
-
- All macros listed above as possibly being defined by this file are
- explicitly undefined if they are not explicitly defined.
- Feature-test macros that are not defined by the user or compiler
- but are implied by the other feature-test macros defined (or by the
- lack of any definitions) are defined by the file.
-
- ISO C feature test macros depend on the definition of the macro
- when an affected header is included, not when the first system
- header is included, and so they are handled in
- , which does not have a multiple include
- guard. Feature test macros that can be handled from the first
- system header included are handled here. */
-
-
-/* Undefine everything, so we get a clean slate. */
-#undef __USE_ISOC11
-#undef __USE_ISOC99
-#undef __USE_ISOC95
-#undef __USE_ISOCXX11
-#undef __USE_POSIX
-#undef __USE_POSIX2
-#undef __USE_POSIX199309
-#undef __USE_POSIX199506
-#undef __USE_XOPEN
-#undef __USE_XOPEN_EXTENDED
-#undef __USE_UNIX98
-#undef __USE_XOPEN2K
-#undef __USE_XOPEN2KXSI
-#undef __USE_XOPEN2K8
-#undef __USE_XOPEN2K8XSI
-#undef __USE_LARGEFILE
-#undef __USE_LARGEFILE64
-#undef __USE_FILE_OFFSET64
-#undef __USE_MISC
-#undef __USE_ATFILE
-#undef __USE_DYNAMIC_STACK_SIZE
-#undef __USE_GNU
-#undef __USE_FORTIFY_LEVEL
-#undef __KERNEL_STRICT_NAMES
-#undef __GLIBC_USE_ISOC2X
-#undef __GLIBC_USE_DEPRECATED_GETS
-#undef __GLIBC_USE_DEPRECATED_SCANF
-
-/* Suppress kernel-name space pollution unless user expressedly asks
- for it. */
-#ifndef _LOOSE_KERNEL_NAMES
-# define __KERNEL_STRICT_NAMES
-#endif
-
-/* Convenience macro to test the version of gcc.
- Use like this:
- #if __GNUC_PREREQ (2,8)
- ... code requiring gcc 2.8 or later ...
- #endif
- Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was
- added in 2.0. */
-#if defined __GNUC__ && defined __GNUC_MINOR__
-# define __GNUC_PREREQ(maj, min) \
- ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
-#else
-# define __GNUC_PREREQ(maj, min) 0
-#endif
-
-/* Similarly for clang. Features added to GCC after version 4.2 may
- or may not also be available in clang, and clang's definitions of
- __GNUC(_MINOR)__ are fixed at 4 and 2 respectively. Not all such
- features can be queried via __has_extension/__has_feature. */
-#if defined __clang_major__ && defined __clang_minor__
-# define __glibc_clang_prereq(maj, min) \
- ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
-#else
-# define __glibc_clang_prereq(maj, min) 0
-#endif
-
-/* Whether to use feature set F. */
-#define __GLIBC_USE(F) __GLIBC_USE_ ## F
-
-/* _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
- _DEFAULT_SOURCE. If _DEFAULT_SOURCE is present we do not
- issue a warning; the expectation is that the source is being
- transitioned to use the new macro. */
-#if (defined _BSD_SOURCE || defined _SVID_SOURCE) \
- && !defined _DEFAULT_SOURCE
-# warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
-# undef _DEFAULT_SOURCE
-# define _DEFAULT_SOURCE 1
-#endif
-
-/* If _GNU_SOURCE was defined by the user, turn on all the other features. */
-#ifdef _GNU_SOURCE
-# undef _ISOC95_SOURCE
-# define _ISOC95_SOURCE 1
-# undef _ISOC99_SOURCE
-# define _ISOC99_SOURCE 1
-# undef _ISOC11_SOURCE
-# define _ISOC11_SOURCE 1
-# undef _ISOC2X_SOURCE
-# define _ISOC2X_SOURCE 1
-# undef _POSIX_SOURCE
-# define _POSIX_SOURCE 1
-# undef _POSIX_C_SOURCE
-# define _POSIX_C_SOURCE 200809L
-# undef _XOPEN_SOURCE
-# define _XOPEN_SOURCE 700
-# undef _XOPEN_SOURCE_EXTENDED
-# define _XOPEN_SOURCE_EXTENDED 1
-# undef _LARGEFILE64_SOURCE
-# define _LARGEFILE64_SOURCE 1
-# undef _DEFAULT_SOURCE
-# define _DEFAULT_SOURCE 1
-# undef _ATFILE_SOURCE
-# define _ATFILE_SOURCE 1
-# undef _DYNAMIC_STACK_SIZE_SOURCE
-# define _DYNAMIC_STACK_SIZE_SOURCE 1
-#endif
-
-/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
- define _DEFAULT_SOURCE. */
-#if (defined _DEFAULT_SOURCE \
- || (!defined __STRICT_ANSI__ \
- && !defined _ISOC99_SOURCE && !defined _ISOC11_SOURCE \
- && !defined _ISOC2X_SOURCE \
- && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE \
- && !defined _XOPEN_SOURCE))
-# undef _DEFAULT_SOURCE
-# define _DEFAULT_SOURCE 1
-#endif
-
-/* This is to enable the ISO C2X extension. */
-#if (defined _ISOC2X_SOURCE \
- || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L))
-# define __GLIBC_USE_ISOC2X 1
-#else
-# define __GLIBC_USE_ISOC2X 0
-#endif
-
-/* This is to enable the ISO C11 extension. */
-#if (defined _ISOC11_SOURCE || defined _ISOC2X_SOURCE \
- || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L))
-# define __USE_ISOC11 1
-#endif
-
-/* This is to enable the ISO C99 extension. */
-#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \
- || defined _ISOC2X_SOURCE \
- || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
-# define __USE_ISOC99 1
-#endif
-
-/* This is to enable the ISO C90 Amendment 1:1995 extension. */
-#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \
- || defined _ISOC2X_SOURCE \
- || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L))
-# define __USE_ISOC95 1
-#endif
-
-#ifdef __cplusplus
-/* This is to enable compatibility for ISO C++17. */
-# if __cplusplus >= 201703L
-# define __USE_ISOC11 1
-# endif
-/* This is to enable compatibility for ISO C++11.
- Check the temporary macro for now, too. */
-# if __cplusplus >= 201103L || defined __GXX_EXPERIMENTAL_CXX0X__
-# define __USE_ISOCXX11 1
-# define __USE_ISOC99 1
-# endif
-#endif
-
-/* If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
- is defined, use POSIX.1-2008 (or another version depending on
- _XOPEN_SOURCE). */
-#ifdef _DEFAULT_SOURCE
-# if !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE
-# define __USE_POSIX_IMPLICITLY 1
-# endif
-# undef _POSIX_SOURCE
-# define _POSIX_SOURCE 1
-# undef _POSIX_C_SOURCE
-# define _POSIX_C_SOURCE 200809L
-#endif
-
-#if ((!defined __STRICT_ANSI__ \
- || (defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) >= 500)) \
- && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE)
-# define _POSIX_SOURCE 1
-# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
-# define _POSIX_C_SOURCE 2
-# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 600
-# define _POSIX_C_SOURCE 199506L
-# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 700
-# define _POSIX_C_SOURCE 200112L
-# else
-# define _POSIX_C_SOURCE 200809L
-# endif
-# define __USE_POSIX_IMPLICITLY 1
-#endif
-
-/* Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
- defined in all multithreaded code. GNU libc has not required this
- for many years. We now treat them as compatibility synonyms for
- _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with
- comprehensive support for multithreaded code. Using them never
- lowers the selected level of POSIX conformance, only raises it. */
-#if ((!defined _POSIX_C_SOURCE || (_POSIX_C_SOURCE - 0) < 199506L) \
- && (defined _REENTRANT || defined _THREAD_SAFE))
-# define _POSIX_SOURCE 1
-# undef _POSIX_C_SOURCE
-# define _POSIX_C_SOURCE 199506L
-#endif
-
-#if (defined _POSIX_SOURCE \
- || (defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 1) \
- || defined _XOPEN_SOURCE)
-# define __USE_POSIX 1
-#endif
-
-#if defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 2 || defined _XOPEN_SOURCE
-# define __USE_POSIX2 1
-#endif
-
-#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199309L
-# define __USE_POSIX199309 1
-#endif
-
-#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199506L
-# define __USE_POSIX199506 1
-#endif
-
-#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200112L
-# define __USE_XOPEN2K 1
-# undef __USE_ISOC95
-# define __USE_ISOC95 1
-# undef __USE_ISOC99
-# define __USE_ISOC99 1
-#endif
-
-#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200809L
-# define __USE_XOPEN2K8 1
-# undef _ATFILE_SOURCE
-# define _ATFILE_SOURCE 1
-#endif
-
-#ifdef _XOPEN_SOURCE
-# define __USE_XOPEN 1
-# if (_XOPEN_SOURCE - 0) >= 500
-# define __USE_XOPEN_EXTENDED 1
-# define __USE_UNIX98 1
-# undef _LARGEFILE_SOURCE
-# define _LARGEFILE_SOURCE 1
-# if (_XOPEN_SOURCE - 0) >= 600
-# if (_XOPEN_SOURCE - 0) >= 700
-# define __USE_XOPEN2K8 1
-# define __USE_XOPEN2K8XSI 1
-# endif
-# define __USE_XOPEN2K 1
-# define __USE_XOPEN2KXSI 1
-# undef __USE_ISOC95
-# define __USE_ISOC95 1
-# undef __USE_ISOC99
-# define __USE_ISOC99 1
-# endif
-# else
-# ifdef _XOPEN_SOURCE_EXTENDED
-# define __USE_XOPEN_EXTENDED 1
-# endif
-# endif
-#endif
-
-#ifdef _LARGEFILE_SOURCE
-# define __USE_LARGEFILE 1
-#endif
-
-#ifdef _LARGEFILE64_SOURCE
-# define __USE_LARGEFILE64 1
-#endif
-
-#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64
-# define __USE_FILE_OFFSET64 1
-#endif
-
-#include
-
-#if defined _DEFAULT_SOURCE
-# define __USE_MISC 1
-#endif
-
-#ifdef _ATFILE_SOURCE
-# define __USE_ATFILE 1
-#endif
-
-#ifdef _DYNAMIC_STACK_SIZE_SOURCE
-# define __USE_DYNAMIC_STACK_SIZE 1
-#endif
-
-#ifdef _GNU_SOURCE
-# define __USE_GNU 1
-#endif
-
-#if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0
-# if !defined __OPTIMIZE__ || __OPTIMIZE__ <= 0
-# warning _FORTIFY_SOURCE requires compiling with optimization (-O)
-# elif !__GNUC_PREREQ (4, 1)
-# warning _FORTIFY_SOURCE requires GCC 4.1 or later
-# elif _FORTIFY_SOURCE > 2 && __glibc_clang_prereq (9, 0)
-# if _FORTIFY_SOURCE > 3
-# warning _FORTIFY_SOURCE > 3 is treated like 3 on this platform
-# endif
-# define __USE_FORTIFY_LEVEL 3
-# elif _FORTIFY_SOURCE > 1
-# if _FORTIFY_SOURCE > 2
-# warning _FORTIFY_SOURCE > 2 is treated like 2 on this platform
-# endif
-# define __USE_FORTIFY_LEVEL 2
-# else
-# define __USE_FORTIFY_LEVEL 1
-# endif
-#endif
-#ifndef __USE_FORTIFY_LEVEL
-# define __USE_FORTIFY_LEVEL 0
-#endif
-
-/* The function 'gets' existed in C89, but is impossible to use
- safely. It has been removed from ISO C11 and ISO C++14. Note: for
- compatibility with various implementations of , this test
- must consider only the value of __cplusplus when compiling C++. */
-#if defined __cplusplus ? __cplusplus >= 201402L : defined __USE_ISOC11
-# define __GLIBC_USE_DEPRECATED_GETS 0
-#else
-# define __GLIBC_USE_DEPRECATED_GETS 1
-#endif
-
-/* GNU formerly extended the scanf functions with modified format
- specifiers %as, %aS, and %a[...] that allocate a buffer for the
- input using malloc. This extension conflicts with ISO C99, which
- defines %a as a standalone format specifier that reads a floating-
- point number; moreover, POSIX.1-2008 provides the same feature
- using the modifier letter 'm' instead (%ms, %mS, %m[...]).
-
- We now follow C99 unless GNU extensions are active and the compiler
- is specifically in C89 or C++98 mode (strict or not). For
- instance, with GCC, -std=gnu11 will have C99-compliant scanf with
- or without -D_GNU_SOURCE, but -std=c89 -D_GNU_SOURCE will have the
- old extension. */
-#if (defined __USE_GNU \
- && (defined __cplusplus \
- ? (__cplusplus < 201103L && !defined __GXX_EXPERIMENTAL_CXX0X__) \
- : (!defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L)))
-# define __GLIBC_USE_DEPRECATED_SCANF 1
-#else
-# define __GLIBC_USE_DEPRECATED_SCANF 0
-#endif
-
-/* Get definitions of __STDC_* predefined macros, if the compiler has
- not preincluded this header automatically. */
-#include
-
-/* This macro indicates that the installed library is the GNU C Library.
- For historic reasons the value now is 6 and this will stay from now
- on. The use of this variable is deprecated. Use __GLIBC__ and
- __GLIBC_MINOR__ now (see below) when you want to test for a specific
- GNU C library version and use the values in to get
- the sonames of the shared libraries. */
-#undef __GNU_LIBRARY__
-#define __GNU_LIBRARY__ 6
-
-/* Major and minor version number of the GNU C library package. Use
- these macros to test for features in specific releases. */
-#define __GLIBC__ 2
-/* Zig patch: we pass `-D__GLIBC_MINOR__=XX` depending on the target. */
-
-#define __GLIBC_PREREQ(maj, min) \
- ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))
-
-/* This is here only because every header file already includes this one. */
-#ifndef __ASSEMBLER__
-# ifndef _SYS_CDEFS_H
-# include
-# endif
-
-/* If we don't have __REDIRECT, prototypes will be missing if
- __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64]. */
-# if defined __USE_FILE_OFFSET64 && !defined __REDIRECT
-# define __USE_LARGEFILE 1
-# define __USE_LARGEFILE64 1
-# endif
-
-#endif /* !ASSEMBLER */
-
-/* Decide whether we can define 'extern inline' functions in headers. */
-#if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
- && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \
- && defined __extern_inline
-# define __USE_EXTERN_INLINES 1
-#endif
-
-
-/* This is here only because every header file already includes this one.
- Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
- contains `#define __stub_FUNCTION' when FUNCTION is a stub
- that will always return failure (and set errno to ENOSYS). */
-#include
-
-
-#endif /* features.h */
diff --git a/lib/libc/glibc/include/stdc-predef.h b/lib/libc/glibc/include/stdc-predef.h
deleted file mode 100644
index e130c462a7..0000000000
--- a/lib/libc/glibc/include/stdc-predef.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- . */
-
-#ifndef _STDC_PREDEF_H
-#define _STDC_PREDEF_H 1
-
-/* This header is separate from features.h so that the compiler can
- include it implicitly at the start of every compilation. It must
- not itself include or any other header that includes
- because the implicit include comes before any feature
- test macros that may be defined in a source file before it first
- explicitly includes a system header. GCC knows the name of this
- header in order to preinclude it. */
-
-/* glibc's intent is to support the IEC 559 math functionality, real
- and complex. If the GCC (4.9 and later) predefined macros
- specifying compiler intent are available, use them to determine
- whether the overall intent is to support these features; otherwise,
- presume an older compiler has intent to support these features and
- define these macros by default. */
-
-#ifdef __GCC_IEC_559
-# if __GCC_IEC_559 > 0
-# define __STDC_IEC_559__ 1
-# endif
-#else
-# define __STDC_IEC_559__ 1
-#endif
-
-#ifdef __GCC_IEC_559_COMPLEX
-# if __GCC_IEC_559_COMPLEX > 0
-# define __STDC_IEC_559_COMPLEX__ 1
-# endif
-#else
-# define __STDC_IEC_559_COMPLEX__ 1
-#endif
-
-/* wchar_t uses Unicode 10.0.0. Version 10.0 of the Unicode Standard is
- synchronized with ISO/IEC 10646:2017, fifth edition, plus
- the following additions from Amendment 1 to the fifth edition:
- - 56 emoji characters
- - 285 hentaigana
- - 3 additional Zanabazar Square characters */
-#define __STDC_ISO_10646__ 201706L
-
-#endif
diff --git a/tools/update_glibc.zig b/tools/update_glibc.zig
index 14d318ea7b..c15123a6de 100644
--- a/tools/update_glibc.zig
+++ b/tools/update_glibc.zig
@@ -51,7 +51,50 @@ pub fn main() !void {
var glibc_src_dir = try fs.cwd().openDir(glibc_src_path, .{});
defer glibc_src_dir.close();
- var walker = try dest_dir.walk(arena);
+ // Copy updated files from upstream.
+ {
+ var walker = try dest_dir.walk(arena);
+ defer walker.deinit();
+
+ walk: while (try walker.next()) |entry| {
+ if (entry.kind != .File) continue;
+ if (mem.startsWith(u8, entry.basename, ".")) continue;
+ for (exempt_files) |p| {
+ if (mem.eql(u8, entry.path, p)) continue :walk;
+ }
+
+ glibc_src_dir.copyFile(entry.path, dest_dir, entry.path, .{}) catch |err| {
+ log.warn("unable to copy '{s}/{s}' to '{s}/{s}': {s}", .{
+ glibc_src_path, entry.path,
+ dest_dir_path, entry.path,
+ @errorName(err),
+ });
+ if (err == error.FileNotFound) {
+ try dest_dir.deleteFile(entry.path);
+ }
+ };
+ }
+ }
+
+ // Warn about duplicated files inside glibc/include/* that can be omitted
+ // because they are already in generic-glibc/*.
+
+ var include_dir = dest_dir.openDir("include", .{ .iterate = true }) catch |err| {
+ fatal("unable to open directory '{s}/include': {s}", .{
+ dest_dir_path, @errorName(err),
+ });
+ };
+ defer include_dir.close();
+
+ const generic_glibc_path = try std.fmt.allocPrint(
+ arena,
+ "{s}/lib/libc/include/generic-glibc",
+ .{zig_src_path},
+ );
+ var generic_glibc_dir = try fs.cwd().openDir(generic_glibc_path, .{});
+ defer generic_glibc_dir.close();
+
+ var walker = try include_dir.walk(arena);
defer walker.deinit();
walk: while (try walker.next()) |entry| {
@@ -61,16 +104,37 @@ pub fn main() !void {
if (mem.eql(u8, entry.path, p)) continue :walk;
}
- glibc_src_dir.copyFile(entry.path, dest_dir, entry.path, .{}) catch |err| {
- log.warn("unable to copy '{s}/{s}' to '{s}/{s}': {s}", .{
- glibc_src_path, entry.path,
- dest_dir_path, entry.path,
- @errorName(err),
- });
- if (err == error.FileNotFound) {
- try dest_dir.deleteFile(entry.path);
- }
+ const max_file_size = 10 * 1024 * 1024;
+
+ const generic_glibc_contents = generic_glibc_dir.readFileAlloc(
+ arena,
+ entry.path,
+ max_file_size,
+ ) catch |err| switch (err) {
+ error.FileNotFound => continue,
+ else => |e| fatal("unable to load '{s}/include/{s}': {s}", .{
+ generic_glibc_path, entry.path, @errorName(e),
+ }),
};
+ const glibc_include_contents = include_dir.readFileAlloc(
+ arena,
+ entry.path,
+ max_file_size,
+ ) catch |err| {
+ fatal("unable to load '{s}/include/{s}': {s}", .{
+ dest_dir_path, entry.path, @errorName(err),
+ });
+ };
+
+ const whitespace = " \r\n\t";
+ const generic_glibc_trimmed = mem.trim(u8, generic_glibc_contents, whitespace);
+ const glibc_include_trimmed = mem.trim(u8, glibc_include_contents, whitespace);
+ if (mem.eql(u8, generic_glibc_trimmed, glibc_include_trimmed)) {
+ log.warn("same contents: '{s}/include/{s}' and '{s}/include/{s}'", .{
+ generic_glibc_path, entry.path,
+ dest_dir_path, entry.path,
+ });
+ }
}
}