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aclocal.m4
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dnl
dnl Bash specific tests
dnl
dnl Some derived from PDKSH 5.1.3 autoconf tests
dnl
dnl Copyright (C) 1987-2021 Free Software Foundation, Inc.
dnl
dnl
dnl Check for <inttypes.h>. This is separated out so that it can be
dnl AC_REQUIREd.
dnl
dnl BASH_HEADER_INTTYPES
AC_DEFUN(BASH_HEADER_INTTYPES,
[
AC_CHECK_HEADERS(inttypes.h)
])
dnl
dnl check for typedef'd symbols in header files, but allow the caller to
dnl specify the include files to be checked in addition to the default
dnl
dnl This could be changed to use AC_COMPILE_IFELSE instead of AC_EGREP_CPP
dnl
dnl BASH_CHECK_TYPE(TYPE, HEADERS, DEFAULT[, VALUE-IF-FOUND])
AC_DEFUN(BASH_CHECK_TYPE,
[
AC_REQUIRE([BASH_HEADER_INTTYPES])
AC_MSG_CHECKING(for $1)
AC_CACHE_VAL(bash_cv_type_$1,
[AC_EGREP_CPP($1, [#include <sys/types.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STDDEF_H
#include <stddef.h>
#endif
#if HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#if HAVE_STDINT_H
#include <stdint.h>
#endif
$2
], bash_cv_type_$1=yes, bash_cv_type_$1=no)])
AC_MSG_RESULT($bash_cv_type_$1)
ifelse($#, 4, [if test $bash_cv_type_$1 = yes; then
AC_DEFINE($4)
fi])
if test $bash_cv_type_$1 = no; then
AC_DEFINE_UNQUOTED($1, $3)
fi
])
dnl
dnl BASH_CHECK_DECL(FUNC)
dnl
dnl Check for a declaration of FUNC in stdlib.h and inttypes.h like
dnl AC_CHECK_DECL
dnl
AC_DEFUN(BASH_CHECK_DECL,
[
AC_REQUIRE([BASH_HEADER_INTTYPES])
AC_CHECK_DECLS([$1])
])
AC_DEFUN(BASH_DECL_PRINTF,
[AC_MSG_CHECKING(for declaration of printf in <stdio.h>)
AC_CACHE_VAL(bash_cv_printf_declared,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#ifdef __STDC__
typedef int (*_bashfunc)(const char *, ...);
#else
typedef int (*_bashfunc)();
#endif
#include <stdlib.h>
int
main()
{
_bashfunc pf;
pf = (_bashfunc) printf;
exit(pf == 0);
}
]])], [bash_cv_printf_declared=yes], [bash_cv_printf_declared=no],
[AC_MSG_WARN(cannot check printf declaration if cross compiling -- defaulting to yes)
bash_cv_printf_declared=yes]
)])
AC_MSG_RESULT($bash_cv_printf_declared)
if test $bash_cv_printf_declared = yes; then
AC_DEFINE(PRINTF_DECLARED)
fi
])
AC_DEFUN(BASH_DECL_SBRK,
[AC_MSG_CHECKING(for declaration of sbrk in <unistd.h>)
AC_CACHE_VAL(bash_cv_sbrk_declared,
[AC_EGREP_HEADER(sbrk, unistd.h,
bash_cv_sbrk_declared=yes, bash_cv_sbrk_declared=no)])
AC_MSG_RESULT($bash_cv_sbrk_declared)
if test $bash_cv_sbrk_declared = yes; then
AC_DEFINE(SBRK_DECLARED)
fi
])
dnl
dnl Check for sys_siglist[] or _sys_siglist[]
dnl
AC_DEFUN(BASH_DECL_UNDER_SYS_SIGLIST,
[AC_MSG_CHECKING([for _sys_siglist in signal.h or unistd.h])
AC_CACHE_VAL(bash_cv_decl_under_sys_siglist,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif]], [[ char *msg = _sys_siglist[2]; ]])],
[bash_cv_decl_under_sys_siglist=yes], [bash_cv_decl_under_sys_siglist=no],
[AC_MSG_WARN(cannot check for _sys_siglist[] if cross compiling -- defaulting to no)])])dnl
AC_MSG_RESULT($bash_cv_decl_under_sys_siglist)
if test $bash_cv_decl_under_sys_siglist = yes; then
AC_DEFINE(UNDER_SYS_SIGLIST_DECLARED)
fi
])
AC_DEFUN(BASH_UNDER_SYS_SIGLIST,
[AC_REQUIRE([BASH_DECL_UNDER_SYS_SIGLIST])
AC_MSG_CHECKING([for _sys_siglist in system C library])
AC_CACHE_VAL(bash_cv_under_sys_siglist,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#ifndef UNDER_SYS_SIGLIST_DECLARED
extern char *_sys_siglist[];
#endif
int
main()
{
char *msg = (char *)_sys_siglist[2];
exit(msg == 0);
}
]])],
[bash_cv_under_sys_siglist=yes], [bash_cv_under_sys_siglist=no],
[AC_MSG_WARN(cannot check for _sys_siglist[] if cross compiling -- defaulting to no)
bash_cv_under_sys_siglist=no]
)])
AC_MSG_RESULT($bash_cv_under_sys_siglist)
if test $bash_cv_under_sys_siglist = yes; then
AC_DEFINE(HAVE_UNDER_SYS_SIGLIST)
fi
])
dnl this defines HAVE_DECL_SYS_SIGLIST
AC_DEFUN([BASH_DECL_SYS_SIGLIST],
[AC_CHECK_DECLS([sys_siglist],,,
[#include <signal.h>
/* NetBSD declares sys_siglist in unistd.h. */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
])
])
AC_DEFUN(BASH_SYS_SIGLIST,
[AC_REQUIRE([BASH_DECL_SYS_SIGLIST])
AC_MSG_CHECKING([for sys_siglist in system C library])
AC_CACHE_VAL(bash_cv_sys_siglist,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#if !HAVE_DECL_SYS_SIGLIST
extern char *sys_siglist[];
#endif
int
main()
{
char *msg = sys_siglist[2];
exit(msg == 0);
}
]])], [bash_cv_sys_siglist=yes], [bash_cv_sys_siglist=no],
[AC_MSG_WARN(cannot check for sys_siglist if cross compiling -- defaulting to no)
bash_cv_sys_siglist=no]
)])
AC_MSG_RESULT($bash_cv_sys_siglist)
if test $bash_cv_sys_siglist = yes; then
AC_DEFINE(HAVE_SYS_SIGLIST)
fi
])
dnl Check for the various permutations of sys_siglist and make sure we
dnl compile in siglist.o if they're not defined
AC_DEFUN(BASH_CHECK_SYS_SIGLIST, [
AC_REQUIRE([BASH_SYS_SIGLIST])
AC_REQUIRE([BASH_DECL_UNDER_SYS_SIGLIST])
AC_REQUIRE([BASH_FUNC_STRSIGNAL])
if test "$bash_cv_sys_siglist" = no && test "$bash_cv_under_sys_siglist" = no && test "$bash_cv_have_strsignal" = no; then
SIGLIST_O=siglist.o
else
SIGLIST_O=
fi
AC_SUBST([SIGLIST_O])
])
dnl Check for sys_errlist[] and sys_nerr, check for declaration
AC_DEFUN(BASH_SYS_ERRLIST,
[AC_MSG_CHECKING([for sys_errlist and sys_nerr])
AC_CACHE_VAL(bash_cv_sys_errlist,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <errno.h>
]],[[
extern char *sys_errlist[];
extern int sys_nerr;
char *msg = sys_errlist[sys_nerr - 1];
]] )],
[bash_cv_sys_errlist=yes], [bash_cv_sys_errlist=no]
)])
AC_MSG_RESULT($bash_cv_sys_errlist)
if test $bash_cv_sys_errlist = yes; then
AC_DEFINE(HAVE_SYS_ERRLIST)
fi
])
dnl
dnl Check if dup2() does not clear the close on exec flag
dnl
AC_DEFUN(BASH_FUNC_DUP2_CLOEXEC_CHECK,
[AC_MSG_CHECKING(if dup2 fails to clear the close-on-exec flag)
AC_CACHE_VAL(bash_cv_dup2_broken,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
int
main()
{
int fd1, fd2, fl;
fd1 = open("/dev/null", 2);
if (fcntl(fd1, 2, 1) < 0)
exit(1);
fd2 = dup2(fd1, 1);
if (fd2 < 0)
exit(2);
fl = fcntl(fd2, 1, 0);
/* fl will be 1 if dup2 did not reset the close-on-exec flag. */
exit(fl != 1);
}
]])], [bash_cv_dup2_broken=yes], [bash_cv_dup2_broken=no],
[AC_MSG_WARN(cannot check dup2 if cross compiling -- defaulting to no)
bash_cv_dup2_broken=no]
)])
AC_MSG_RESULT($bash_cv_dup2_broken)
if test $bash_cv_dup2_broken = yes; then
AC_DEFINE(DUP2_BROKEN)
fi
])
AC_DEFUN(BASH_FUNC_STRSIGNAL,
[AC_MSG_CHECKING([for the existence of strsignal])
AC_CACHE_VAL(bash_cv_have_strsignal,
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#include <sys/types.h>
#include <signal.h>
#include <string.h>]],
[[char *s = (char *)strsignal(2);]])],
[bash_cv_have_strsignal=yes], [bash_cv_have_strsignal=no])])
AC_MSG_RESULT($bash_cv_have_strsignal)
if test $bash_cv_have_strsignal = yes; then
AC_DEFINE(HAVE_STRSIGNAL)
fi
])
dnl Check to see if opendir will open non-directories (not a nice thing)
AC_DEFUN(BASH_FUNC_OPENDIR_CHECK,
[AC_REQUIRE([AC_HEADER_DIRENT])dnl
AC_MSG_CHECKING(if opendir() opens non-directories)
AC_CACHE_VAL(bash_cv_opendir_not_robust,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if defined(HAVE_DIRENT_H)
# include <dirent.h>
#else
# define dirent direct
# ifdef HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif /* SYSNDIR */
# ifdef HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif /* SYSDIR */
# ifdef HAVE_NDIR_H
# include <ndir.h>
# endif
#endif /* HAVE_DIRENT_H */
#include <stdlib.h>
int
main()
{
DIR *dir;
int fd, err;
err = mkdir("bash-aclocal", 0700);
if (err < 0) {
perror("mkdir");
exit(1);
}
unlink("bash-aclocal/not_a_directory");
fd = open("bash-aclocal/not_a_directory", O_WRONLY|O_CREAT|O_EXCL, 0666);
write(fd, "\n", 1);
close(fd);
dir = opendir("bash-aclocal/not_a_directory");
unlink("bash-aclocal/not_a_directory");
rmdir("bash-aclocal");
exit (dir == 0);
}
]])], [bash_cv_opendir_not_robust=yes], [bash_cv_opendir_not_robust=no],
[AC_MSG_WARN(cannot check opendir if cross compiling -- defaulting to no)
bash_cv_opendir_not_robust=no]
)])
AC_MSG_RESULT($bash_cv_opendir_not_robust)
if test $bash_cv_opendir_not_robust = yes; then
AC_DEFINE(OPENDIR_NOT_ROBUST)
fi
])
dnl
dnl A signed 16-bit integer quantity
dnl
AC_DEFUN(BASH_TYPE_BITS16_T,
[
if test "$ac_cv_sizeof_short" = 2; then
AC_CHECK_TYPE(bits16_t, short)
elif test "$ac_cv_sizeof_char" = 2; then
AC_CHECK_TYPE(bits16_t, char)
else
AC_CHECK_TYPE(bits16_t, short)
fi
])
dnl
dnl An unsigned 16-bit integer quantity
dnl
AC_DEFUN(BASH_TYPE_U_BITS16_T,
[
if test "$ac_cv_sizeof_short" = 2; then
AC_CHECK_TYPE(u_bits16_t, unsigned short)
elif test "$ac_cv_sizeof_char" = 2; then
AC_CHECK_TYPE(u_bits16_t, unsigned char)
else
AC_CHECK_TYPE(u_bits16_t, unsigned short)
fi
])
dnl
dnl A signed 32-bit integer quantity
dnl
AC_DEFUN(BASH_TYPE_BITS32_T,
[
if test "$ac_cv_sizeof_int" = 4; then
AC_CHECK_TYPE(bits32_t, int)
elif test "$ac_cv_sizeof_long" = 4; then
AC_CHECK_TYPE(bits32_t, long)
else
AC_CHECK_TYPE(bits32_t, int)
fi
])
dnl
dnl An unsigned 32-bit integer quantity
dnl
AC_DEFUN(BASH_TYPE_U_BITS32_T,
[
if test "$ac_cv_sizeof_int" = 4; then
AC_CHECK_TYPE(u_bits32_t, unsigned int)
elif test "$ac_cv_sizeof_long" = 4; then
AC_CHECK_TYPE(u_bits32_t, unsigned long)
else
AC_CHECK_TYPE(u_bits32_t, unsigned int)
fi
])
AC_DEFUN(BASH_TYPE_PTRDIFF_T,
[
if test "$ac_cv_sizeof_int" = "$ac_cv_sizeof_char_p"; then
AC_CHECK_TYPE(ptrdiff_t, int)
elif test "$ac_cv_sizeof_long" = "$ac_cv_sizeof_char_p"; then
AC_CHECK_TYPE(ptrdiff_t, long)
elif test "$ac_cv_type_long_long" = yes && test "$ac_cv_sizeof_long_long" = "$ac_cv_sizeof_char_p"; then
AC_CHECK_TYPE(ptrdiff_t, [long long])
else
AC_CHECK_TYPE(ptrdiff_t, int)
fi
])
dnl
dnl A signed 64-bit quantity
dnl
AC_DEFUN(BASH_TYPE_BITS64_T,
[
if test "$ac_cv_sizeof_char_p" = 8; then
AC_CHECK_TYPE(bits64_t, char *)
elif test "$ac_cv_sizeof_double" = 8; then
AC_CHECK_TYPE(bits64_t, double)
elif test -n "$ac_cv_type_long_long" && test "$ac_cv_sizeof_long_long" = 8; then
AC_CHECK_TYPE(bits64_t, [long long])
elif test "$ac_cv_sizeof_long" = 8; then
AC_CHECK_TYPE(bits64_t, long)
else
AC_CHECK_TYPE(bits64_t, double)
fi
])
AC_DEFUN(BASH_SIZEOF_RLIMIT,
[AC_MSG_CHECKING(for size of struct rlimit fields)
AC_CACHE_VAL(bash_cv_sizeof_rlim_cur,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <stdlib.h>
#include <sys/resource.h>
main()
{
struct rlimit r;
exit(sizeof (r.rlim_cur));
}
]])], [bash_cv_sizeof_rlim_cur=$?], [bash_cv_sizeof_rlim_cur=$?],
[AC_MSG_WARN(cannot check size of rlimit fields if cross compiling -- defaulting to long)
bash_cv_sizeof_rlim_cur=$ac_cv_sizeof_long]
)])
AC_MSG_RESULT($bash_cv_sizeof_rlim_cur)
])
AC_DEFUN(BASH_SIZEOF_QUAD_T,
[AC_MSG_CHECKING(for size of quad_t)
AC_CACHE_VAL(bash_cv_sizeof_quad_t,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <sys/types.h>
#include <stdlib.h>
#if HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#if HAVE_STDINT_H
#include <stdint.h>
#endif
main()
{
#if HAVE_QUAD_T
quad_t x;
exit(sizeof (x));
#else
exit (0);
#endif
}
]])], [bash_cv_sizeof_quad_t=$?], [bash_cv_sizeof_quad_t=$?],
[AC_MSG_WARN(cannot check size of quad_t if cross compiling -- defaulting to 0)
bash_cv_sizeof_quad_t=0]
)])
AC_MSG_RESULT($bash_cv_sizeof_quad_t)
])
dnl
dnl Type of struct rlimit fields: updated to check POSIX rlim_t and
dnl if it doesn't exist determine the best guess based on sizeof(r.rlim_cur)
dnl
AC_DEFUN(BASH_TYPE_RLIMIT,
[AC_MSG_CHECKING(for type of struct rlimit fields)
AC_CACHE_VAL(bash_cv_type_rlimit,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/resource.h>]],
[[rlim_t xxx;]]
)],
[bash_cv_type_rlimit=rlim_t], [
BASH_SIZEOF_RLIMIT
BASH_SIZEOF_QUAD_T
if test $bash_cv_sizeof_rlim_cur = $ac_cv_sizeof_long; then
bash_cv_type_rlimit='unsigned long'
elif test $bash_cv_sizeof_rlim_cur = $ac_cv_sizeof_long_long; then
bash_cv_type_rlimit='unsigned long long'
elif test $bash_cv_sizeof_rlim_cur = $ac_cv_sizeof_int; then
bash_cv_type_rlimit='unsigned int'
elif test $bash_cv_sizeof_rlim_cur = $bash_cv_sizeof_quad_t; then
bash_cv_type_rlimit='quad_t'
else
bash_cv_type_rlimit='unsigned long'
fi
]
)])
AC_MSG_RESULT($bash_cv_type_rlimit)
AC_DEFINE_UNQUOTED([RLIMTYPE], [$bash_cv_type_rlimit])
])
AC_DEFUN(BASH_TYPE_SIG_ATOMIC_T,
[AC_CACHE_CHECK([for sig_atomic_t in signal.h], ac_cv_have_sig_atomic_t,
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[ #include <signal.h> ]],
[[ sig_atomic_t x; ]])],
[ac_cv_have_sig_atomic_t=yes],[ac_cv_have_sig_atomic_t=no])])
if test "$ac_cv_have_sig_atomic_t" = "no"
then
BASH_CHECK_TYPE(sig_atomic_t, [#include <signal.h>], int)
fi
])
AC_DEFUN(BASH_FUNC_LSTAT,
[dnl Cannot use AC_CHECK_FUNCS(lstat) because Linux defines lstat() as an
dnl inline function in <sys/stat.h>.
AC_CACHE_CHECK([for lstat], bash_cv_func_lstat,
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/stat.h>
]],
[[ lstat(".",(struct stat *)0); ]])],
[bash_cv_func_lstat=yes],[bash_cv_func_lstat=no])])
if test $bash_cv_func_lstat = yes; then
AC_DEFINE(HAVE_LSTAT)
fi
])
AC_DEFUN(BASH_FUNC_INET_ATON,
[
AC_CACHE_CHECK([for inet_aton], bash_cv_func_inet_aton,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct in_addr ap;]], [[ inet_aton("127.0.0.1", &ap); ]])],
[bash_cv_func_inet_aton=yes], [bash_cv_func_inet_aton=no])])
if test $bash_cv_func_inet_aton = yes; then
AC_DEFINE(HAVE_INET_ATON)
else
AC_LIBOBJ(inet_aton)
fi
])
AC_DEFUN(BASH_FUNC_GETENV,
[AC_MSG_CHECKING(to see if getenv can be redefined)
AC_CACHE_VAL(bash_cv_getenv_redef,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdlib.h>
#ifndef __STDC__
# ifndef const
# define const
# endif
#endif
char *
getenv (name)
#if defined (__linux__) || defined (__bsdi__) || defined (convex)
const char *name;
#else
char const *name;
#endif /* !__linux__ && !__bsdi__ && !convex */
{
return "42";
}
int
main()
{
char *s;
/* The next allows this program to run, but does not allow bash to link
when it redefines getenv. I'm not really interested in figuring out
why not. */
#if defined (NeXT)
exit(1);
#endif
s = getenv("ABCDE");
exit(s == 0); /* force optimizer to leave getenv in */
}
]])], [bash_cv_getenv_redef=yes], [bash_cv_getenv_redef=no],
[AC_MSG_WARN(cannot check getenv redefinition if cross compiling -- defaulting to yes)
bash_cv_getenv_redef=yes]
)])
AC_MSG_RESULT($bash_cv_getenv_redef)
if test $bash_cv_getenv_redef = yes; then
AC_DEFINE(CAN_REDEFINE_GETENV)
fi
])
# We should check for putenv before calling this
AC_DEFUN(BASH_FUNC_STD_PUTENV,
[
AC_REQUIRE([AC_C_PROTOTYPES])
AC_CACHE_CHECK([for standard-conformant putenv declaration], bash_cv_std_putenv,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifndef __STDC__
# ifndef const
# define const
# endif
#endif
#ifdef PROTOTYPES
extern int putenv (char *);
#else
extern int putenv ();
#endif
]], [[return (putenv == 0);]] )],
[bash_cv_std_putenv=yes], [bash_cv_std_putenv=no]
)])
if test $bash_cv_std_putenv = yes; then
AC_DEFINE(HAVE_STD_PUTENV)
fi
])
# We should check for unsetenv before calling this
AC_DEFUN(BASH_FUNC_STD_UNSETENV,
[
AC_REQUIRE([AC_C_PROTOTYPES])
AC_CACHE_CHECK([for standard-conformant unsetenv declaration], bash_cv_std_unsetenv,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifndef __STDC__
# ifndef const
# define const
# endif
#endif
#ifdef PROTOTYPES
extern int unsetenv (const char *);
#else
extern int unsetenv ();
#endif
]], [[return (unsetenv == 0);]] )],
[bash_cv_std_unsetenv=yes], [bash_cv_std_unsetenv=no]
)])
if test $bash_cv_std_unsetenv = yes; then
AC_DEFINE(HAVE_STD_UNSETENV)
fi
])
AC_DEFUN(BASH_FUNC_ULIMIT_MAXFDS,
[AC_MSG_CHECKING(whether ulimit can substitute for getdtablesize)
AC_CACHE_VAL(bash_cv_ulimit_maxfds,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdlib.h>
#ifdef HAVE_ULIMIT_H
#include <ulimit.h>
#endif
int
main()
{
long maxfds = ulimit(4, 0L);
exit (maxfds == -1L);
}
]])], [bash_cv_ulimit_maxfds=yes], [bash_cv_ulimit_maxfds=no],
[AC_MSG_WARN(cannot check ulimit if cross compiling -- defaulting to no)
bash_cv_ulimit_maxfds=no]
)])
AC_MSG_RESULT($bash_cv_ulimit_maxfds)
if test $bash_cv_ulimit_maxfds = yes; then
AC_DEFINE(ULIMIT_MAXFDS)
fi
])
AC_DEFUN(BASH_FUNC_GETCWD,
[AC_MSG_CHECKING([if getcwd() will dynamically allocate memory with 0 size])
AC_CACHE_VAL(bash_cv_getcwd_malloc,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
int
main()
{
char *xpwd;
xpwd = getcwd(0, 0);
exit (xpwd == 0);
}
]])], [bash_cv_getcwd_malloc=yes], [bash_cv_getcwd_malloc=no],
[AC_MSG_WARN(cannot check whether getcwd allocates memory when cross-compiling -- defaulting to no)
bash_cv_getcwd_malloc=no]
)])
AC_MSG_RESULT($bash_cv_getcwd_malloc)
if test $bash_cv_getcwd_malloc = no; then
AC_DEFINE(GETCWD_BROKEN)
AC_LIBOBJ(getcwd)
fi
])
dnl
dnl This needs BASH_CHECK_SOCKLIB, but since that's not called on every
dnl system, we can't use AC_PREREQ. Only called if we need the socket library
dnl
AC_DEFUN(BASH_FUNC_GETHOSTBYNAME,
[if test "X$bash_cv_have_gethostbyname" = "X"; then
_bash_needmsg=yes
else
AC_MSG_CHECKING(for gethostbyname in socket library)
_bash_needmsg=
fi
AC_CACHE_VAL(bash_cv_have_gethostbyname,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <netdb.h>
]], [[
struct hostent *hp;
hp = gethostbyname("localhost");
]] )],
[bash_cv_have_gethostbyname=yes], [bash_cv_have_gethostbyname=no]
)])
if test "X$_bash_needmsg" = Xyes; then
AC_MSG_CHECKING(for gethostbyname in socket library)
fi
AC_MSG_RESULT($bash_cv_have_gethostbyname)
if test "$bash_cv_have_gethostbyname" = yes; then
AC_DEFINE(HAVE_GETHOSTBYNAME)
fi
])
AC_DEFUN(BASH_FUNC_FNMATCH_EXTMATCH,
[AC_MSG_CHECKING(if fnmatch does extended pattern matching with FNM_EXTMATCH)
AC_CACHE_VAL(bash_cv_fnm_extmatch,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <fnmatch.h>
int
main()
{
#ifdef FNM_EXTMATCH
return (0);
#else
return (1);
#endif
}
]])], [bash_cv_fnm_extmatch=yes], [bash_cv_fnm_extmatch=no],
[AC_MSG_WARN(cannot check FNM_EXTMATCH if cross compiling -- defaulting to no)
bash_cv_fnm_extmatch=no]
)])
AC_MSG_RESULT($bash_cv_fnm_extmatch)
if test $bash_cv_fnm_extmatch = yes; then
AC_DEFINE(HAVE_LIBC_FNM_EXTMATCH)
fi
])
AC_DEFUN(BASH_FUNC_POSIX_SETJMP,
[AC_REQUIRE([BASH_SYS_SIGNAL_VINTAGE])
AC_MSG_CHECKING(for presence of POSIX-style sigsetjmp/siglongjmp)
AC_CACHE_VAL(bash_cv_func_sigsetjmp,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#include <signal.h>
#include <setjmp.h>
#include <stdlib.h>
int
main()
{
#if !defined (_POSIX_VERSION) || !defined (HAVE_POSIX_SIGNALS)
exit (1);
#else
int code;
sigset_t set, oset, nset;
sigjmp_buf xx;
/* get the mask */
sigemptyset(&set);
sigemptyset(&oset);
sigprocmask(SIG_BLOCK, (sigset_t *)NULL, &oset);
/* paranoia -- make sure SIGINT is not blocked */
sigdelset (&oset, SIGINT);
sigprocmask (SIG_SETMASK, &oset, (sigset_t *)NULL);
/* save it */
code = sigsetjmp(xx, 1);
if (code)
{
sigprocmask(SIG_BLOCK, (sigset_t *)NULL, &nset);
/* could compare nset to oset here, but we just look for SIGINT */
if (sigismember (&nset, SIGINT))
exit(1);
exit(0);
}
/* change it so that SIGINT is blocked */
sigaddset(&set, SIGINT);
sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
/* and siglongjmp */
siglongjmp(xx, 10);
exit(1);
#endif
}
]])], [bash_cv_func_sigsetjmp=present], [bash_cv_func_sigsetjmp=missing],
[AC_MSG_WARN(cannot check for sigsetjmp/siglongjmp if cross-compiling -- defaulting to $bash_cv_posix_signals)
if test "$bash_cv_posix_signals" = "yes" ; then
bash_cv_func_sigsetjmp=present
else
bash_cv_func_sigsetjmp=missing
fi]
)])
AC_MSG_RESULT($bash_cv_func_sigsetjmp)
if test $bash_cv_func_sigsetjmp = present; then
AC_DEFINE(HAVE_POSIX_SIGSETJMP)
fi
])
AC_DEFUN(BASH_FUNC_STRCOLL,
[AC_MSG_CHECKING(whether or not strcoll and strcmp differ)
AC_CACHE_VAL(bash_cv_func_strcoll_broken,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#if defined (HAVE_LOCALE_H)
#include <locale.h>
#endif
#include <string.h>
#include <stdlib.h>
int
main(c, v)
int c;
char *v[];
{
int r1, r2;
char *deflocale, *defcoll;
#ifdef HAVE_SETLOCALE
deflocale = setlocale(LC_ALL, "");
defcoll = setlocale(LC_COLLATE, "");
#endif
#ifdef HAVE_STRCOLL
/* These two values are taken from tests/glob-test. */
r1 = strcoll("abd", "aXd");
#else
r1 = 0;
#endif
r2 = strcmp("abd", "aXd");
/* These two should both be greater than 0. It is permissible for
a system to return different values, as long as the sign is the
same. */
/* Exit with 1 (failure) if these two values are both > 0, since
this tests whether strcoll(3) is broken with respect to strcmp(3)
in the default locale. */
exit (r1 > 0 && r2 > 0);
}
]])], [bash_cv_func_strcoll_broken=yes], [bash_cv_func_strcoll_broken=no],
[AC_MSG_WARN(cannot check strcoll if cross compiling -- defaulting to no)
bash_cv_func_strcoll_broken=no]
)])
AC_MSG_RESULT($bash_cv_func_strcoll_broken)
if test $bash_cv_func_strcoll_broken = yes; then
AC_DEFINE(STRCOLL_BROKEN)
fi
])
AC_DEFUN(BASH_FUNC_PRINTF_A_FORMAT,
[AC_MSG_CHECKING([for printf floating point output in hex notation])
AC_CACHE_VAL(bash_cv_printf_a_format,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int
main()
{
double y = 0.0;
char abuf[1024];
sprintf(abuf, "%A", y);
exit(strchr(abuf, 'P') == (char *)0);
}
]])], [bash_cv_printf_a_format=yes], [bash_cv_printf_a_format=no],
[AC_MSG_WARN(cannot check printf if cross compiling -- defaulting to no)
bash_cv_printf_a_format=no]
)])
AC_MSG_RESULT($bash_cv_printf_a_format)
if test $bash_cv_printf_a_format = yes; then
AC_DEFINE(HAVE_PRINTF_A_FORMAT)
fi
])
AC_DEFUN(BASH_STRUCT_TERMIOS_LDISC,
[
AC_CHECK_MEMBER(struct termios.c_line, AC_DEFINE(TERMIOS_LDISC), ,[
#include <sys/types.h>
#include <termios.h>
])
])
AC_DEFUN(BASH_STRUCT_TERMIO_LDISC,
[
AC_CHECK_MEMBER(struct termio.c_line, AC_DEFINE(TERMIO_LDISC), ,[
#include <sys/types.h>
#include <termio.h>
])
])
dnl
dnl Like AC_STRUCT_ST_BLOCKS, but doesn't muck with LIBOBJS
dnl
dnl sets bash_cv_struct_stat_st_blocks
dnl
dnl unused for now; we'll see how AC_CHECK_MEMBERS works
dnl
AC_DEFUN(BASH_STRUCT_ST_BLOCKS,
[
AC_MSG_CHECKING([for struct stat.st_blocks])
AC_CACHE_VAL(bash_cv_struct_stat_st_blocks,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/stat.h>
]], [[
int
main()
{
static struct stat a;
if (a.st_blocks) return 0;
return 0;
}
]])], [bash_cv_struct_stat_st_blocks=yes], [bash_cv_struct_stat_st_blocks=no])
])
AC_MSG_RESULT($bash_cv_struct_stat_st_blocks)
if test "$bash_cv_struct_stat_st_blocks" = "yes"; then
AC_DEFINE(HAVE_STRUCT_STAT_ST_BLOCKS)
fi
])
AC_DEFUN([BASH_CHECK_LIB_TERMCAP],
[
if test "X$bash_cv_termcap_lib" = "X"; then
_bash_needmsg=yes
else
AC_MSG_CHECKING(which library has the termcap functions)
_bash_needmsg=
fi
AC_CACHE_VAL(bash_cv_termcap_lib,
[AC_CHECK_FUNC(tgetent, bash_cv_termcap_lib=libc,
[AC_CHECK_LIB(termcap, tgetent, bash_cv_termcap_lib=libtermcap,
[AC_CHECK_LIB(tinfo, tgetent, bash_cv_termcap_lib=libtinfo,
[AC_CHECK_LIB(curses, tgetent, bash_cv_termcap_lib=libcurses,
[AC_CHECK_LIB(ncurses, tgetent, bash_cv_termcap_lib=libncurses,
[AC_CHECK_LIB(ncursesw, tgetent, bash_cv_termcap_lib=libncursesw,
bash_cv_termcap_lib=gnutermcap)])])])])])])
if test "X$_bash_needmsg" = "Xyes"; then
AC_MSG_CHECKING(which library has the termcap functions)
fi
AC_MSG_RESULT(using $bash_cv_termcap_lib)
if test $bash_cv_termcap_lib = gnutermcap && test -z "$prefer_curses"; then
LDFLAGS="$LDFLAGS -L./lib/termcap"
TERMCAP_LIB="./lib/termcap/libtermcap.a"
TERMCAP_DEP="./lib/termcap/libtermcap.a"
elif test $bash_cv_termcap_lib = libtermcap && test -z "$prefer_curses"; then
TERMCAP_LIB=-ltermcap
TERMCAP_DEP=
elif test $bash_cv_termcap_lib = libtinfo; then
TERMCAP_LIB=-ltinfo
TERMCAP_DEP=
elif test $bash_cv_termcap_lib = libncurses; then
TERMCAP_LIB=-lncurses
TERMCAP_DEP=
elif test $bash_cv_termcap_lib = libc; then
TERMCAP_LIB=
TERMCAP_DEP=
else
# we assume ncurses is installed somewhere the linker can find it
TERMCAP_LIB=-lncurses
TERMCAP_DEP=
fi
])