Joseph Myers 8b4a118222 Fix -Os gnu_dev_* linknamespace, localplt issues (bug 15105, bug 19463). ... Building with -Os produces linknamespace and localplt failures for, among other functions, gnu_dev_major, gnu_dev_minor and gnu_dev_makedev. The issue is that those functions are not inlined when building with -Os. While one could force them to be inlined in that case, it seems more natural to fix this issue similarly to other namespace issues. Thus, this patch makes gnu_dev_* into weak aliases for hidden symbols __gnu_dev_*; __gnu_dev_* are then defined as inlines in the internal include/sys/sysmacros.h, and uses of gnu_dev_* (often via the macros major, minor and makedev) for which there are namespace issues are changed to use __gnu_dev_*; where there are no namespace issues, use of libc_hidden_proto serves to avoid unnecessary local PLT entry use. Tested for x86_64, (a) without -Os, to verify the testsuite continues to pass without problems and that the functions called under their new names continue to be inlined as expected in that case; (b) with -Os, to verify that the linknamespace and localplt failures in question go away (but because of other such failures present, neither of the relevant bugs can yet be closed). [BZ #15105] [BZ #19463] * include/sys/sysmacros.h [!_ISOMAC] (__SYSMACROS_NEED_IMPLEMENTATION): Define macro. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (_SYS_SYSMACROS_H_WRAPPER): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_major): Use libc_hidden_proto. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_minor): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (gnu_dev_makedev): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_DECL_TEMPL): Undefine and redefine to add use __gnu_dev_ prefix. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__SYSMACROS_IMPL_TEMPL): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_major): Declare and define as hidden inline function. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_minor): Likewise. [!_SYS_SYSMACROS_H_WRAPPER && !_ISOMAC] (__gnu_dev_makedev): Likewise. * misc/makedev.c (OUT_OF_LINE_IMPL_TEMPL): Use __gnu_dev_ prefix. (gnu_dev_major): Use weak_alias and libc_hidden_weak. (gnu_dev_minor): Likewise. (gnu_dev_makedev): Likewise. * csu/check_fds.c (check_one_fd): Use __gnu_dev_makedev instead of makedev. * posix/wordexp.c (exec_comm_child): Likewise. * sysdeps/mach/hurd/xmknodat.c (__xmknodat): Use __gnu_dev_minor instead of minor and __gnu_dev_major instead of major. * sysdeps/unix/sysv/linux/device-nrs.h (DEV_TTY_P): Use __gnu_dev_major instead of major. * sysdeps/unix/sysv/linux/pathconf.c (distinguish_extX): Use __gnu_dev_major instead of gnu_dev_major and __gnu_dev_minor instead of gnu_dev_minor. * sysdeps/unix/sysv/linux/ptsname.c (MASTER_P): Likewise. (SLAVE_P): Likewise. (__ptsname_internal): Use __gnu_dev_minor instead of minor. * sysdeps/unix/sysv/linux/ttyname.h (is_pty): Use __gnu_dev_major instead of major.		2018-02-07 14:57:31 +00:00
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auxv.h
bitypes.h
cdefs.h
dir.h
epoll.h
errno.h
fcntl.h
file.h
gmon_out.h
gmon.h
ioctl.h	Hide internal __ioctl function [BZ #18822]	2017-10-01 15:59:06 -07:00
ipc.h
mman.h	Hide internal __mremap function [BZ #18822]	2017-10-01 16:02:04 -07:00
msg.h
param.h
poll.h
prctl.h
profil.h
queue.h
resource.h	Hide internal __setrlimit function [BZ #18822]	2017-10-01 17:46:54 -07:00
select.h
sem.h
sendfile.h
shm.h
signal.h
socket.h
stat.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
statfs.h
statvfs.h
sysctl.h
sysinfo.h	Hide internal sysinfo functions [BZ #18822]	2017-10-01 15:57:21 -07:00
syslog.h
sysmacros.h	Fix -Os gnu_dev_* linknamespace, localplt issues (bug 15105, bug 19463).	2018-02-07 14:57:31 +00:00
termios.h
time.h	Update copyright dates with scripts/update-copyrights.	2018-01-01 00:32:25 +00:00
timeb.h
times.h
types.h
uio.h	Hide __readv and __writev [BZ #18822]	2017-10-01 15:54:10 -07:00
un.h
unistd.h
utsname.h	Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN	2017-10-03 01:33:38 +02:00
vlimit.h
vtimes.h
wait.h
xattr.h