mirror of
https://sourceware.org/git/glibc.git
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7fb90fb89b
The getcwd syscall (so far?) can only handle path up to one page in size. There is no limit about directory hierarchy depth, though, and the POSIX getcwd is supposed to handle this. In that case fall back to the generic getcwd. Additionally, optimize the generic getcwd to use openat when possible to change the asymptotic performance from O(N^2) to O(n).
169 lines
5.0 KiB
Makefile
169 lines
5.0 KiB
Makefile
ifeq ($(subdir),csu)
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sysdep_routines += errno-loc
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endif
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ifeq ($(subdir),assert)
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CFLAGS-assert.c += -DFATAL_PREPARE_INCLUDE='<fatal-prepare.h>'
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CFLAGS-assert-perr.c += -DFATAL_PREPARE_INCLUDE='<fatal-prepare.h>'
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endif
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ifeq ($(subdir),malloc)
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CFLAGS-malloc.c += -DMORECORE_CLEARS=2
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endif
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ifeq ($(subdir),socket)
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sysdep_routines += internal_accept4 recvmmsg internal_recvmmsg
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endif
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ifeq ($(subdir),misc)
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sysdep_routines += sysctl clone llseek umount umount2 readahead \
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setfsuid setfsgid makedev epoll_pwait signalfd \
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eventfd eventfd_read eventfd_write prlimit
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CFLAGS-gethostid.c = -fexceptions
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sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
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sys/klog.h sys/kdaemon.h \
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sys/user.h sys/procfs.h sys/prctl.h \
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sys/kd.h sys/soundcard.h sys/vt.h \
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sys/quota.h sys/fsuid.h \
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scsi/sg.h scsi/scsi.h scsi/scsi_ioctl.h sys/pci.h \
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sys/ultrasound.h sys/raw.h sys/personality.h sys/epoll.h \
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bits/a.out.h sys/inotify.h sys/signalfd.h sys/eventfd.h \
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sys/timerfd.h sys/fanotify.h
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install-others += $(inst_includedir)/bits/syscall.h
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tests += tst-clone
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# Generate the list of SYS_* macros for the system calls (__NR_* macros).
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# For bi-arch platforms, the CPU/Makefile defines {32,64}bit-predefine and
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# we generate a file that uses <bits/wordsize.h>.
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$(objpfx)syscall-%.h $(objpfx)syscall-%.d: ../sysdeps/unix/sysv/linux/sys/syscall.h
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$(make-target-directory)
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{ \
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echo '/* Generated at libc build time from kernel syscall list. */';\
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echo ''; \
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echo '#ifndef _SYSCALL_H'; \
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echo '# error "Never use <bits/syscall.h> directly; include <sys/syscall.h> instead."'; \
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echo '#endif'; \
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echo ''; \
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$(CC) -E -MD -MP -MF $(@:.h=.d)-t1 -MT '$(@:.d=.h) $(@:.h=.d)' \
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-x c $(sysincludes) $< $(addprefix -U,$(64bit-predefine)) \
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$(addprefix -D,$(32bit-predefine)) -D_LIBC -dM | \
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sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \
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LC_ALL=C sort > $(@:.d=.h).new32; \
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$(CC) -E -MD -MP -MF $(@:.h=.d)-t2 -MT '$(@:.d=.h) $(@:.h=.d)' \
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-x c $(sysincludes) $< $(addprefix -U,$(32bit-predefine)) \
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$(addprefix -D,$(64bit-predefine)) -D_LIBC -dM | \
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sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \
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LC_ALL=C sort > $(@:.d=.h).new64; \
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if cmp -s $(@:.d=.h).new32 $(@:.d=.h).new64; then \
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cat $(@:.d=.h).new32; \
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else \
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echo '#include <bits/wordsize.h>'; \
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echo ''; \
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LC_ALL=C comm -12 $(@:.d=.h).new32 $(@:.d=.h).new64; \
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echo '#if __WORDSIZE == 64'; \
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LC_ALL=C comm -13 $(@:.d=.h).new32 $(@:.d=.h).new64; \
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echo '#else'; \
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LC_ALL=C comm -23 $(@:.d=.h).new32 $(@:.d=.h).new64; \
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echo '#endif'; \
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fi; \
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rm -f $(@:.d=.h).new32 $(@:.d=.h).new64; \
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} > $(@:.d=.h).new
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mv -f $(@:.d=.h).new $(@:.d=.h)
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ifneq (,$(objpfx))
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sed $(sed-remove-objpfx) $(@:.h=.d)-t1 $(@:.h=.d)-t2 > $(@:.h=.d)-t3
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else
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cat $(@:.h=.d)-t1 $(@:.h=.d)-t2 > $(@:.h=.d)-t3
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endif
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rm -f $(@:.h=.d)-t1 $(@:.h=.d)-t2
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mv -f $(@:.h=.d)-t3 $(@:.h=.d)
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$(inst_includedir)/bits/syscall.h: $(objpfx)syscall-list.h $(+force)
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$(make-target-directory)
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if test -r $@ && cmp -s $< $@; \
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then echo 'bits/syscall.h unchanged'; \
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else $(INSTALL_DATA) $< $@; fi
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ifndef no_deps
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# Get the generated list of dependencies (probably /usr/include/asm/unistd.h).
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-include $(objpfx)syscall-list.d
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endif
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generated += syscall-list.h syscall-list.d
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endif
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ifeq ($(subdir),time)
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sysdep_headers += sys/timex.h bits/timex.h
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sysdep_routines += ntp_gettime ntp_gettimex
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endif
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ifeq ($(subdir),socket)
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sysdep_headers += net/if_ppp.h net/ppp-comp.h \
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net/ppp_defs.h net/if_arp.h net/route.h net/ethernet.h \
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net/if_slip.h net/if_packet.h net/if_shaper.h
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sysdep_routines += cmsg_nxthdr sa_len
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endif
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ifeq ($(subdir),sunrpc)
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sysdep_headers += nfs/nfs.h
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endif
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ifeq ($(subdir),termios)
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sysdep_headers += termio.h
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endif
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ifeq ($(subdir),posix)
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sysdep_headers += bits/initspin.h
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sysdep_routines += exit-thread sched_getcpu
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tests += tst-getcpu
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endif
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ifeq ($(subdir),inet)
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sysdep_headers += netinet/if_fddi.h netinet/if_tr.h \
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netipx/ipx.h netash/ash.h netax25/ax25.h netatalk/at.h \
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netrom/netrom.h netpacket/packet.h netrose/rose.h \
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neteconet/ec.h netiucv/iucv.h
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endif
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# Don't compile the ctype glue code, since there is no old non-GNU C library.
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inhibit-glue = yes
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ifeq ($(subdir),dirent)
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sysdep_routines += getdirentries getdirentries64
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endif
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ifeq ($(subdir),nis)
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CFLAGS-ypclnt.c = -DUSE_BINDINGDIR=1
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endif
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ifeq ($(subdir),io)
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sysdep_routines += xstatconv internal_statvfs internal_statvfs64 \
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sync_file_range open_2 open64_2 fallocate fallocate64
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endif
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ifeq ($(subdir),elf)
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sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd
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CPPFLAGS-lddlibc4 += -DNOT_IN_libc
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endif
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ifeq ($(subdir),rt)
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CFLAGS-mq_send.c += -fexceptions
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CFLAGS-mq_receive.c += -fexceptions
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endif
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ifeq ($(subdir),nscd)
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CFLAGS-connections.c += -DHAVE_EPOLL -DHAVE_SENDFILE -DHAVE_INOTIFY
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CFLAGS-pwdcache.c += -DHAVE_SENDFILE
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CFLAGS-grpcache.c += -DHAVE_SENDFILE
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CFLAGS-hstcache.c += -DHAVE_SENDFILE
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CFLAGS-aicache.c += -DHAVE_SENDFILE
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CFLAGS-initgrcache.c += -DHAVE_SENDFILE
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CFLAGS-gai.c += -DNEED_NETLINK
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endif
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