mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 12:41:05 +00:00
2dba5ce7b8
This commit changes the way the list of SYS_* system call macros is created on Linux. glibc now contains a list of all known system calls, and the generated <bits/syscall.h> file defines the SYS_ macro only if the correspnding __NR_ macro is defined by the kernel headers. As a result, glibc does not have to be rebuilt to pick up system calls if the glibc sources already know about them. This means that glibc can be built with older kernel headers, and if the installed kernel headers are upgraded afterwards, additional SYS_ macros become available as long as glibc has a record for those system calls.
203 lines
6.6 KiB
Makefile
203 lines
6.6 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),misc)
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include $(firstword $(wildcard $(sysdirs:=/sysctl.mk)))
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sysdep_routines += clone umount umount2 readahead \
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setfsuid setfsgid epoll_pwait signalfd \
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eventfd eventfd_read eventfd_write prlimit \
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personality epoll_wait tee vmsplice splice \
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open_by_handle_at
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CFLAGS-gethostid.c = -fexceptions
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CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-vmsplice.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-splice.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-open_by_handle_at.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-sync_file_range.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-tst-writev.c += "-DARTIFICIAL_LIMIT=(0x80000000-sysconf(_SC_PAGESIZE))"
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# Note that bits/mman-linux.h is listed here though the file lives in the
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# top-level bits/ subdirectory instead of here in sysdeps/.../linux/bits/.
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# That is just so that other (non-Linux) configurations for whom the
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# bits/mman-linux.h definitions work well do not have to duplicate the
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# contents of the file. The file must still be listed in sysdep_headers
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# here and in any non-Linux configuration that uses it; other
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# configurations will not install the file.
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sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
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sys/klog.h \
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sys/user.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/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 bits/eventfd.h bits/inotify.h \
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bits/signalfd.h bits/timerfd.h bits/epoll.h \
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bits/socket_type.h bits/syscall.h bits/sysctl.h \
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bits/mman-linux.h \
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bits/siginfo-arch.h bits/siginfo-consts-arch.h
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tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
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tst-quota tst-sync_file_range test-errno-linux
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# Generate the list of SYS_* macros for the system calls (__NR_*
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# macros). The file syscall-names.list contains all possible system
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# call names, and the generated header file produces SYS_* macros for
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# the __NR_* macros which are actually defined.
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generated += bits/syscall.h
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$(objpfx)bits/syscall.h: \
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../sysdeps/unix/sysv/linux/gen-syscall-h.awk \
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../sysdeps/unix/sysv/linux/syscall-names.list
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$(make-target-directory)
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LC_ALL=C $(AWK) -f $^ > $@-tmp
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$(move-if-change) $@-tmp $@
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before-compile += $(objpfx)bits/syscall.h
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# All macros defined by <sys/syscall.h>. Include <bits/syscall.h>
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# explicitly because <sys/sycall.h> skips it if _LIBC is defined.
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$(objpfx)tst-syscall-list-macros.list: \
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$(objpfx)bits/syscall.h ../sysdeps/unix/sysv/linux/sys/syscall.h
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printf '#include <linux/version.h>\n\
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#include <sys/syscall.h>\n#include <bits/syscall.h>\n' | \
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$(CC) -E -o $@-tmp $(CFLAGS) $(CPPFLAGS) -x c - -dM
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$(move-if-change) $@-tmp $@
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# __NR_* system call names. Used by the test below.
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$(objpfx)tst-syscall-list-nr.list: \
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../sysdeps/unix/sysv/linux/filter-nr-syscalls.awk \
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$(objpfx)tst-syscall-list-macros.list
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LC_ALL=C $(AWK) -f $^ > $@-tmp
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$(move-if-change) $@-tmp $@
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# SYS_* system call names. Used by the test below.
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$(objpfx)tst-syscall-list-sys.list: $(objpfx)tst-syscall-list-macros.list
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LC_ALL=C $(AWK) '/^#define SYS_/ { print substr($$2, 5) }' $< > $@-tmp
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$(move-if-change) $@-tmp $@
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tests-special += $(objpfx)tst-syscall-list.out
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$(objpfx)tst-syscall-list.out: \
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../sysdeps/unix/sysv/linux/tst-syscall-list.sh \
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$(objpfx)tst-syscall-list-macros.list \
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$(objpfx)tst-syscall-list-nr.list \
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$(objpfx)tst-syscall-list-sys.list
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$(BASH) $^ $(AWK) > $@; $(evaluate-test)
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endif # $(subdir) == misc
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ifeq ($(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),signal)
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tests-special += $(objpfx)tst-signal-numbers.out
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# Depending on signal.o* is a hack. What we actually want is a dependency
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# on signal.h and everything it includes. That's impractical to write
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# in this context, but signal.c includes signal.h and not much else so it'll
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# be conservatively correct.
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$(objpfx)tst-signal-numbers.out: \
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../sysdeps/unix/sysv/linux/tst-signal-numbers.sh \
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$(objpfx)signal.o*
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AWK=$(AWK) $(SHELL) ../sysdeps/unix/sysv/linux/tst-signal-numbers.sh \
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$(CC) $(patsubst -DMODULE_NAME=%,-DMODULE_NAME=testsuite,$(CPPFLAGS)) \
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< /dev/null > $@; $(evaluate-test)
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endif
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ifeq ($(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
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CFLAGS-recvmmsg.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-sendmmsg.c = -fexceptions -fasynchronous-unwind-tables
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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 += sched_getcpu
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tests += tst-affinity tst-affinity-pid
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CFLAGS-fork.c = $(libio-mtsafe)
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CFLAGS-getpid.o = -fomit-frame-pointer
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CFLAGS-getpid.os = -fomit-frame-pointer
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endif
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ifeq ($(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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sysdep_routines += netlink_assert_response
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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 ($(subdir),io)
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sysdep_routines += xstatconv internal_statvfs internal_statvfs64 \
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sync_file_range fallocate fallocate64
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sysdep_headers += bits/fcntl-linux.h
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tests += tst-fallocate tst-fallocate64
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endif
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ifeq ($(subdir),elf)
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sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd dl-openat64 dl-opendir \
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dl-fxstatat64
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libof-lddlibc4 = lddlibc4
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others += pldd
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install-bin += pldd
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$(objpfx)pldd: $(objpfx)xmalloc.o
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endif
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ifeq ($(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 ($(subdir),nscd)
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sysdep-CFLAGS += -DHAVE_EPOLL -DHAVE_SENDFILE -DHAVE_INOTIFY -DHAVE_NETLINK
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CFLAGS-gai.c += -DNEED_NETLINK
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endif
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ifeq ($(subdir),nptl)
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tests += tst-align-clone tst-getpid1 \
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tst-thread-affinity-pthread tst-thread-affinity-pthread2 \
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tst-thread-affinity-sched
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tests-internal += tst-setgetname
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endif
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