kc3-lang/gnulib/m4/strsignal.m4

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• m4/strsignal.m4

• # strsignal.m4 serial 10
  dnl Copyright (C) 2008-2023 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
  dnl with or without modifications, as long as this notice is preserved.
  
  AC_DEFUN([gl_FUNC_STRSIGNAL],
  [
    dnl Persuade glibc <string.h> to declare strsignal().
    AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  
    AC_REQUIRE([gl_STRING_H_DEFAULTS])
    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  
    AC_CHECK_DECLS_ONCE([strsignal])
    if test $ac_cv_have_decl_strsignal = no; then
      HAVE_DECL_STRSIGNAL=0
    fi
  
    AC_CHECK_FUNCS([strsignal])
    if test $ac_cv_func_strsignal = yes; then
      HAVE_STRSIGNAL=1
      dnl Check if strsignal behaves reasonably for out-of-range signal numbers.
      dnl On Solaris it returns NULL; on AIX 5.1 it returns (char *) -1.
      AC_CACHE_CHECK([whether strsignal always returns a string],
        [gl_cv_func_working_strsignal],
        [AC_RUN_IFELSE(
           [AC_LANG_PROGRAM(
              [[#include <string.h>
  #include <unistd.h> /* NetBSD 5.0 declares it in wrong header. */
              ]],
              [[int result = 0;
                char *s = strsignal (-1);
                if (s == (char *) 0)
                  result |= 1;
                if (s == (char *) -1)
                  result |= 2;
                return result;
              ]])],
           [gl_cv_func_working_strsignal=yes],
           [gl_cv_func_working_strsignal=no],
           [case "$host_os" in
              solaris* | aix*) gl_cv_func_working_strsignal=no;;
              *)               gl_cv_func_working_strsignal="guessing yes";;
            esac])])
      if test "$gl_cv_func_working_strsignal" = no; then
        REPLACE_STRSIGNAL=1
      fi
    else
      HAVE_STRSIGNAL=0
    fi
  ])
  
  # Prerequisites of lib/strsignal.c.
  AC_DEFUN([gl_PREREQ_STRSIGNAL], [
    AC_CHECK_HEADERS_ONCE([unistd.h])
    AC_CHECK_DECLS([sys_siglist], [], [], [[#include <signal.h>]])
    AC_CHECK_DECLS([_sys_siglist], [], [], [[#include <signal.h>]])
  ])
  

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