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author | Zack Weinberg <zackw@panix.com> | 2018-02-05 14:13:41 -0500 |
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committer | Zack Weinberg <zackw@panix.com> | 2018-02-07 10:10:32 -0500 |
commit | 63fb8f9aa9d19f85599afe4b849b567aefd70a36 (patch) | |
tree | 607f89b682d7c7200b389cba7de7e4496806565f /sysdeps/unix/sysv/linux/bits | |
parent | 6c6c962a202299b55d180e04f44a63ffb748096c (diff) | |
download | glibc-63fb8f9aa9d19f85599afe4b849b567aefd70a36.tar.gz glibc-63fb8f9aa9d19f85599afe4b849b567aefd70a36.tar.xz glibc-63fb8f9aa9d19f85599afe4b849b567aefd70a36.zip |
Post-cleanup 2: minimize _G_config.h.
Nearly everything in _G_config.h is either junk or more appropriately defined elsewhere: * _G_fpos_t, _G_fpos64_t, and _G_BUFSIZ are already completely unused. * All remaining uses of _G_va_list have been changed to __gnuc_va_list. * The definition of _G_HAVE_ST_BLKSIZE/_IO_HAVE_ST_BLKSIZE has been inlined into its sole use. * The complete definition of _G_iconv_t has been moved to libio.h and renamed _IO_iconv_t (all actual users used that name). * _G_IO_IO_FILE_VERSION is vestigial; some code cares whether _IO_stdin_used exists, but nothing looks at its value. I've preserved the value as a hardwired constant in csu/init.c. This means csu/init.c no longer needs to include anything. * Many of the headers included by _G_config.h were already being included directly by either either libio.h or stdio.h; the remaining ones were moved to libio.h. * _G_HAVE_MREMAP is still relevant, because mremap genuinely is a Linux extension; it's not in POSIX and as far as I can tell it's not available on the Hurd either. I also preserved _G_HAVE_MMAP, since it's conceivable someone would want to port glibc to a MMU-less, mmap-less environment in the future. Both are now always defined to 1/0 as is the current convention, instead of the older 1/undef convention. These are the only symbols still defined in _G_config.h. * The actual inclusion of _G_config.h moves from libio.h to libioP.h, as this is where a potential override of _G_HAVE_MMAP happens. * The #ifdef logic in libioP.h controlling _IO_JUMPS_OFFSET has been simplified. After this patch, the only surviving _G_ symbols are the struct tag names _G_fpos_t and _G_fpos64_t, which are preserved for the sake of C++ mangled names in applications, and _G_HAVE_MMAP and _G_HAVE_MREMAP, which do not seem worth renaming. Installed stripped libraries are unchanged by this patch. * bits/_G_config.h: Move back to sysdeps/generic/_G_config.h. Delete all contents except for definitions of _G_HAVE_MMAP and _G_HAVE_MREMAP. Add commentary explaining those two symbols. * sysdeps/unix/sysv/linux/bits/_G_config.h: Move back to sysdeps/unix/sysv/linux/_G_config.h. Make same content change as above. * libio/libio.h: Don't include bits/_G_config.h here. Include stddef.h with __need_wchar_t defined. Include bits/types/__mbstate_t.h, bits/types/wint_t.h, and gconv.h. Define _IO_iconv_t here, directly. Don't define _IO_HAVE_ST_BLKSIZE. * libio/libioP.h: Include _G_config.h here. Move include of shlib-compat.h up with rest of includes. Simplify conditionals controlling definition of _IO_JUMPS_OFFSET. * csu/init.c: Remove always-true #if around entire file. Don't include stdio.h. Set _IO_stdin_used to hardwired constant 0x20001, and update commentary. * include/stdio.h, sysdeps/ieee754/ldbl-opt/nldbl-compat.h: Replace all uses of _G_va_list with __gnuc_va_list. * libio/filedoalloc.c: Use #if defined _STATBUF_ST_BLKSIZE instead of #if _IO_HAVE_ST_BLKSIZE. * libio/fileops.c: Test _G_HAVE_MREMAP with #if, not #ifdef. * libio/iofdopen.c, libio/iofopen.c: Test _G_HAVE_MMAP with #if, not #ifdef.
Diffstat (limited to 'sysdeps/unix/sysv/linux/bits')
-rw-r--r-- | sysdeps/unix/sysv/linux/bits/_G_config.h | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/_G_config.h b/sysdeps/unix/sysv/linux/bits/_G_config.h deleted file mode 100644 index 05a64acb2c..0000000000 --- a/sysdeps/unix/sysv/linux/bits/_G_config.h +++ /dev/null @@ -1,55 +0,0 @@ -/* This file is needed by libio to define various configuration parameters. - These are always the same in the GNU C library. */ - -#ifndef _BITS_G_CONFIG_H -#define _BITS_G_CONFIG_H 1 - -/* Define types for libio in terms of the standard internal type names. */ - -#include <bits/types.h> -#define __need_size_t -#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T -# define __need_wchar_t -#endif -#define __need_NULL -#include <stddef.h> - -#include <bits/types/__mbstate_t.h> -#include <bits/types/__fpos_t.h> -#include <bits/types/__fpos64_t.h> - -#define _G_fpos_t __fpos_t -#define _G_fpos64_t __fpos64_t - -#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T -# include <bits/types/wint_t.h> -#endif - -#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T -# include <gconv.h> -typedef union -{ - struct __gconv_info __cd; - struct - { - struct __gconv_info __cd; - struct __gconv_step_data __data; - } __combined; -} _G_iconv_t; -#endif - - -/* These library features are always available in the GNU C library. */ -#define _G_va_list __gnuc_va_list - -#define _G_HAVE_MMAP 1 -#define _G_HAVE_MREMAP 1 - -#define _G_IO_IO_FILE_VERSION 0x20001 - -/* This is defined by <bits/stat.h> if `st_blksize' exists. */ -#define _G_HAVE_ST_BLKSIZE defined (_STATBUF_ST_BLKSIZE) - -#define _G_BUFSIZ 8192 - -#endif /* bits/_G_config.h */ |