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8082d91e1c
Many of the things defined by bits/signum.h are invariant across all supported operating systems. This patch factors out all of them to a new header bits/signum-generic.h, which each bits/signum.h will include and then override whichever things need adjustment. Normally that will mean, at most, adding or changing a few signal numbers. A user-visible side effect is that the obsolete signal constant SIGUNUSED (which is an alias for SIGSYS on all platforms that define it) is no longer exposed by any version of bits/signum.h. A side effect only relevant to glibc hackers is that _NSIG is now defined in terms of __SIGRTMAX, instead of the other way around. This is because __SIGRTMAX varies from platform to platform, but _NSIG==__SIGRTMAX+1 is true universally. If your platform doesn't support realtime signals, leave __SIGRTMAX equal to __SIGRTMIN. I also added a Linux-specific test to make sure that our signal constants match the ones in <asm/signal.h>, since we can't use that header (it's not even vaguely namespace-clean). * bits/signum-generic.h: Renamed from bits/signum.h. Add proper multiple include guard and misuse check. Define __SIGRTMIN = __SIGRTMAX = 32, and define _NSIG = __SIGRTMAX+1. Move definition of SIGIO to "archaic names for compatibility" section. * bits/signum.h: New file which just includes bits/signum-generic.h. * sysdeps/unix/bsd/bits/signum.h * sysdeps/unix/sysv/linux/bits/signum.h * sysdeps/unix/sysv/linux/alpha/bits/signum.h * sysdeps/unix/sysv/linux/hppa/bits/signum.h * sysdeps/unix/sysv/linux/mips/bits/signum.h * sysdeps/unix/sysv/linux/sparc/bits/signum.h Just include <bits/signum-generic.h> and then add or adjust signal constants. Do not define SIGUNUSED, SIGRTMIN, or SIGRTMAX. * signal/Makefile: Install bits/signum-generic.h. * signal/signal.h: Define SIGRTMIN and SIGRTMAX here. * sysdeps/generic/siglist.h: SIGSYS and SIGWINCH are universal. Prefer SIGPOLL to SIGIO. Simplify #ifdeffage. * sysdeps/unix/sysv/linux/tst-signal-numbers.sh: New test. * sysdeps/unix/sysv/linux/Makefile: Run it.
59 lines
2.1 KiB
Makefile
59 lines
2.1 KiB
Makefile
# Copyright (C) 1991-2017 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Makefile for signal routines.
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#
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subdir := signal
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include ../Makeconfig
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headers := signal.h sys/signal.h \
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bits/signum.h bits/signum-generic.h \
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bits/sigcontext.h bits/sigaction.h \
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bits/sigevent-consts.h bits/siginfo-consts.h \
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bits/sigstack.h bits/sigthread.h bits/ss_flags.h \
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bits/types/__sigset_t.h bits/types/sig_atomic_t.h \
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bits/types/sigevent_t.h bits/types/siginfo_t.h \
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bits/types/sigset_t.h bits/types/sigval_t.h \
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bits/types/stack_t.h bits/types/struct_sigstack.h
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routines := signal raise killpg \
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sigaction sigprocmask kill \
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sigpending sigsuspend sigwait \
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sigblock sigsetmask sigpause sigvec \
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sigstack sigaltstack sigintr \
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sigsetops sigempty sigfillset sigaddset sigdelset sigismem \
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sigreturn \
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siggetmask sysv_signal \
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sigisempty sigandset sigorset \
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allocrtsig sigtimedwait sigwaitinfo sigqueue \
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sighold sigrelse sigignore sigset
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tests := tst-signal tst-sigset tst-sigsimple tst-raise tst-sigset2
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include ../Rules
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CFLAGS-sigpause.c = -fexceptions
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CFLAGS-sigsuspend.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-sigtimedwait.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-sigwait.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-sigwaitinfo.c = -fexceptions -fasynchronous-unwind-tables
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CFLAGS-sigreturn.c = $(no-stack-protector)
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