[RFC 0/9] Remove legacy platform bits and cleanups

[Florian Weimer]

* Stefan Liebler:

> This patch series is the result of:
> "Question regarding platform-bits in ld.so.cache"
> https://sourceware.org/pipermail/libc-alpha/2024-May/156793.html

This series fails to build on MIPS with:

mips64-glibc-linux-gnu-gcc -mabi=32 ldconfig.c -c -std=gnu11 -fgnu89-inline  -g -O2 -Wall -Wwrite-strings -Wundef -Werror -fmerge-all-constants -frounding-math -fno-stack-protector -fno-common -Wp,-U_FORTIFY_SOURCE -Wstrict-prototypes -Wold-style-definition -fmath-errno -D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64   -fPIE    -Wa,-execstack -D'SYSCONFDIR="/etc"' -D'LIBDIR="/usr/lib"' -D'SLIBDIR="/lib"'       -I../include -I/home/bmg/build/glibcs/mips-linux-gnu/glibc/elf  -I/home/bmg/build/glibcs/mips-linux-gnu/glibc  -I../sysdeps/unix/sysv/linux/mips/mips32/fpu  -I../sysdeps/unix/sysv/linux/mips/mips32  -I../sysdeps/unix/sysv/linux/mips  -I../sysdeps/mips/nptl  -I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux  -I../sysdeps/nptl  -I../sysdeps/pthread  -I../sysdeps/gnu  -I../sysdeps/unix/inet  -I../sysdeps/unix/sysv  -I../sysdeps/unix/mips/mips32  -I../sysdeps/unix/mips  -I../sysdeps/unix  -I../sysdeps/posix  -I../sysdeps/mips/mips32/fpu  -I../sysdeps/mips/mips32  -I../sysdeps/mips/ieee754  -I../sysdeps/mips/include -I../sysdeps/mips  -I../sysdeps/ieee754/flt-32  -I../sysdeps/ieee754/dbl-64  -I../sysdeps/wordsize-32  -I../sysdeps/mips/fpu  -I../sysdeps/ieee754  -I../sysdeps/generic  -I.. -I../libio -I.   -D_LIBC_REENTRANT -include /home/bmg/build/glibcs/mips-linux-gnu/glibc/libc-modules.h -DMODULE_NAME=ldconfig -include ../include/libc-symbols.h  -DPIC     -DTOP_NAMESPACE=glibc -o /home/bmg/build/glibcs/mips-linux-gnu/glibc/elf/ldconfig.o -MD -MP -MF /home/bmg/build/glibcs/mips-linux-gnu/glibc/elf/ldconfig.o.dt -MT /home/bmg/build/glibcs/mips-linux-gnu/glibc/elf/ldconfig.o
In file included from ../sysdeps/generic/ldsodefs.h:643,
                 from ../sysdeps/mips/ldsodefs.h:82,
                 from ../sysdeps/gnu/ldsodefs.h:46,
                 from ../sysdeps/unix/sysv/linux/ldsodefs.h:25,
                 from ../sysdeps/unix/sysv/linux/mips/ldsodefs.h:22,
                 from ../sysdeps/mips/dl-procinfo.h:22,
                 from /home/bmg/build/glibcs/mips-linux-gnu/glibc/dl-tunable-list.h:6,
                 from ../elf/dl-tunables.h:48,
                 from ./dl-hwcaps.h:25,
                 from ldconfig.c:44:
../sysdeps/unix/sysv/linux/dl-vdso-setup.c:62:22: error: ‘_dl_vdso_clock_getres’ defined but not used [-Werror=unused-variable]
   62 | PROCINFO_CLASS int (*_dl_vdso_clock_getres) (clockid_t,
      |                      ^~~~~~~~~~~~~~~~~~~~~
../sysdeps/unix/sysv/linux/dl-vdso-setup.c:53:22: error: ‘_dl_vdso_gettimeofday’ defined but not used [-Werror=unused-variable]
   53 | PROCINFO_CLASS int (*_dl_vdso_gettimeofday) (struct timeval *, void *) RELRO;
      |                      ^~~~~~~~~~~~~~~~~~~~~
../sysdeps/unix/sysv/linux/dl-vdso-setup.c:49:22: error: ‘_dl_vdso_clock_gettime64’ defined but not used [-Werror=unused-variable]
   49 | PROCINFO_CLASS int (*_dl_vdso_clock_gettime64) (clockid_t,
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~
../sysdeps/unix/sysv/linux/dl-vdso-setup.c:45:22: error: ‘_dl_vdso_clock_gettime’ defined but not used [-Werror=unused-variable]
   45 | PROCINFO_CLASS int (*_dl_vdso_clock_gettime) (clockid_t,
      |                      ^~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[3]: *** [../o-iterator.mk:9: /home/bmg/build/glibcs/mips-linux-gnu/glibc/elf/ldconfig.o] Error 1
make[3]: Leaving directory '/home/bmg/src/glibc/elf'
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [Makefile:484: elf/others] Error 2
make[1]: *** [Makefile:9: all] Error 2

Florian