kc3-lang/gnulib/modules/sigsegv

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• Hash : b4c57b42
  Author :
  Date : 2021-12-24T17:22:00
  

  maint: avoid empty lines in recipes
  
  AIX 7.2 ‘make’ complains about recipe lines that are empty after
  macro expansion, and I suppose there’s a good chance some
  non-POSIX ‘make’ would prohibit them.  Rework macros so
  that we can avoid them.
  * gnulib-tool (func_emit_lib_Makefile_am)
  (func_emit_lib_Makefile_am): Support @!NMD@ too.
  * modules/gen-header (@gl_V_at): New macro.
  * modules/alloca-opt, modules/argz, modules/assert-h:
  * modules/byteswap, modules/configmake, modules/ctype:
  * modules/dirent, modules/errno, modules/execinfo, modules/fcntl-h:
  * modules/float, modules/fnmatch-h, modules/getopt-posix:
  * modules/glob-h, modules/iconv-h, modules/ieee754-h:
  * modules/inttypes-incomplete, modules/langinfo:
  * modules/libtextstyle-optional, modules/limits-h, modules/locale:
  * modules/malloc-h, modules/math, modules/monetary, modules/netdb:
  * modules/openmp-init, modules/poll-h, modules/posix-shell:
  * modules/pthread-h, modules/pty, modules/sched, modules/search:
  * modules/signal-h, modules/sigsegv, modules/snippet/link-warning:
  * modules/spawn, modules/stdalign, modules/stdarg, modules/stdbool:
  * modules/stddef, modules/stdint, modules/stdio, modules/stdlib:
  * modules/stdnoreturn, modules/string, modules/strings:
  * modules/sysexits, modules/termios, modules/threads-h:
  * modules/time, modules/uchar, modules/unicase/base:
  * modules/uniconv/base, modules/unictype/base, modules/unigbrk/base:
  * modules/unilbrk/base, modules/uniname/base, modules/uninorm/base:
  * modules/unistd, modules/unistdio/base, modules/unistr/base:
  * modules/unitypes, modules/uniwbrk/base, modules/uniwidth/base:
  * modules/utime-h, modules/wchar, modules/wctype-h:
  Use it.
  

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• modules/sigsegv

• Description:
  A simplified variant of GNU libsigsegv.
  It implements the most important features of GNU libsigsegv: catching SIGSEGV
  and catching stack overflow. It does *not* implement the 'sigsegv_dispatcher'
  type (which is not multithread-safe).
  It supports all modern Unix-like platforms: Linux, Hurd, FreeBSD, NetBSD,
  OpenBSD, macOS, AIX, Solaris, Cygwin, Haiku, even IRIX. It does *not* support
  HP-UX, Minix, native Windows; on these platforms the module compiles and
  provides a <sigsegv.h> header file, but it does not define HAVE_SIGSEGV_RECOVERY
  and HAVE_STACK_OVERFLOW_RECOVERY.
  Unlike GNU libsigsegv, which consists of many .h and .c files, this module
  compiles to just two object files, rather than a library.
  
  Files:
  lib/sigsegv.in.h
  lib/sigsegv.c
  lib/stackvma.h
  lib/stackvma.c
  m4/mmap-anon.m4
  m4/sigaltstack.m4
  m4/stack-direction.m4
  m4/libsigsegv.m4
  m4/sigsegv.m4
  
  Depends-on:
  gen-header
  havelib
  host-cpu-c-abi
  stdint
  getpagesize
  
  configure.ac:
  AC_REQUIRE([gl_SIGSEGV])
  if test $gl_sigsegv_uses_libsigsegv = yes; then
    GL_GENERATE_SIGSEGV_H=false
  else
    GL_GENERATE_SIGSEGV_H=true
  fi
  gl_CONDITIONAL_HEADER([sigsegv.h])
  AC_PROG_MKDIR_P
  if $GL_GENERATE_SIGSEGV_H; then
    dnl Persuade glibc <sys/ucontext.h> to declare macros designating register
    dnl indices: REG_RSP on x86_64, REG_ESP on i386.
    dnl Persuade Solaris OpenIndiana <ucontext.h> to include <sys/regset.h>,
    dnl which declares macros designating register indices, such as ESP on i386.
    dnl Persuade Solaris OpenIndiana <unistd.h> to declare mincore().
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  
    AC_REQUIRE([AC_CANONICAL_HOST])
    case "$host_os" in
      solaris2.11)
        AC_DEFINE([SOLARIS11], [1], [Define on Solaris 11 and its derivates.])
        ;;
    esac
  
    gl_FUNC_MMAP_ANON
  
    dnl Stack direction.
    SV_STACK_DIRECTION
  
    dnl Catching stack overflow requires an alternate signal stack.
    dnl The old "install a guard page" trick would be unreliable, because
    dnl we don't know where exactly to place the guard page.
    SV_SIGALTSTACK
  
    AC_CHECK_FUNCS_ONCE([getrlimit])
  fi
  
  Makefile.am:
  BUILT_SOURCES += $(SIGSEGV_H)
  
  if GL_GENERATE_SIGSEGV_H
  sigsegv.h: sigsegv.in.h $(top_builddir)/config.status
  @NMD@	$(AM_V_GEN)$(MKDIR_P) '%reldir%'
  	$(gl_V_at)$(SED_HEADER_TO_AT_t) $(srcdir)/sigsegv.in.h
  	$(AM_V_at)mv $@-t $@
  else
  sigsegv.h: $(top_builddir)/config.status
  	rm -f $@
  endif
  MOSTLYCLEANFILES += sigsegv.h sigsegv.h-t
  
  if GL_GENERATE_SIGSEGV_H
  lib_SOURCES += sigsegv.c stackvma.c
  endif
  
  Include:
  <sigsegv.h>
  
  Link:
  $(LTLIBSIGSEGV) when linking with libtool, $(LIBSIGSEGV) otherwise
  
  License:
  GPLv2+
  
  Maintainer:
  Bruno Haible
  

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