# demo.at -- Linking and loading. -*- Autotest -*-
#
#   Copyright (C) 2003-2004, 2011-2019, 2021-2024 Free Software
#   Foundation, Inc.
#   Written by Gary V. Vaughan, 2003
#
#   This file is part of GNU Libtool.
#
# GNU Libtool is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# GNU Libtool is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Libtool.  If not, see <https://www.gnu.org/licenses/>.
####


AT_BANNER([Linking and loading.])

## ------------------------------------------- ##
## Some functions shared by later tests cases. ##
## ------------------------------------------- ##

# This function needs to be used, rather than 'exit', when a 'trap' handler is
# in effect that refers to $?.
func_exit ()
{
  (exit $1); exit $1
}

func_restore_files ()
{
    test -n "$objdir" || exit 1
    mv -f "$objdir"/temp/libs/* "$objdir"
    mv -f "$objdir/temp/libhello.la" .
    rm -rf "$objdir/temp"
}

func_save_files ()
{
    test -n "$objdir" || exit 1
    $lt_INSTALL -d "$objdir/temp/libs"
    cp -f libhello.la "$objdir/temp"
    cp -f "$objdir"/libhello.* "$objdir/lt-hell$EXEEXT" "$objdir/temp/libs"
}


# _LT_DEMO_SETUP
# --------------
m4_define([_LT_DEMO_SETUP],
[AT_DATA([configure.ac],
[[AC_INIT([demo], ]AT_PACKAGE_VERSION[, ]AT_PACKAGE_BUGREPORT[)
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIRS([m4])
AM_INIT_AUTOMAKE
AC_PROG_CC

LT_INIT([dlopen win32-dll])
AC_SUBST([LIBTOOL_DEPS])
STATIC=
test yes = "$enable_static" && STATIC=-static
AC_SUBST([STATIC])

case $lt_cv_sys_global_symbol_pipe in
  ?*) binary_helldl=yes ;;
esac
AM_CONDITIONAL([BINARY_HELLDL], [test yes = "$binary_helldl"])

LT_LIB_M
AC_CONFIG_FILES([Makefile])
AC_CONFIG_HEADERS([config.h:config.in.h])
AC_OUTPUT
]])

AT_DATA([Makefile.am],
[[AUTOMAKE_OPTIONS = no-dependencies foreign
ACLOCAL_AMFLAGS = -I m4

# Build a libtool library, libhello.la for installation in libdir.
lib_LTLIBRARIES = libhello.la
libhello_la_SOURCES = hello.c foo.c
libhello_la_LIBADD = $(LIBM)
libhello_la_LDFLAGS = -no-undefined -version-info 3:12:1
libhello_la_CPPFLAGS = $(AM_CPPFLAGS) -DBUILDING_LIBHELLO

include_HEADERS = foo.h

if BINARY_HELLDL
BUILD_helldl = helldl
else
BUILD_helldl =
endif

bin_PROGRAMS = hell hell_static $(BUILD_helldl)

# Build hell from main.c and libhello.la
hell_SOURCES = main.c
hell_LDADD = libhello.la

# Create a statically linked version of hell.
hell_static_SOURCES = main.c
hell_static_LDADD = libhello.la
hell_static_LDFLAGS = $(STATIC)

if BINARY_HELLDL

# Create a version of hell that does a preloaded dlopen.
helldl_SOURCES = dlmain.c
helldl_LDFLAGS = -export-dynamic -dlpreopen libhello.la
helldl_DEPENDENCIES = libhello.la

else

# Create a script that says that -dlopen is not supported.
bin_SCRIPTS = helldl
helldl helldl$(EXEEXT):
	rm -rf $@
	echo '#! /bin/sh' > $@
	echo 'echo sorry, -dlopen is unsupported' >> $@
	chmod +x $@

endif

libtool: $(LIBTOOL_DEPS)
	$(SHELL) ./config.status --recheck

include $(srcdir)/demo.mk
]])

AT_DATA([demo.mk],
[[## Don't abort for lack of demo.mk
]])

AT_DATA([foo.h],
[[#ifndef FOO_H
#define FOO_H

/* At some point, cygwin will stop defining __CYGWIN32__, but b19 and
 * earlier do not define __CYGWIN__.  This snippet allows us to check
 * for __CYGWIN__ reliably for both current, old, and (probable) future
 * releases.
 */
#ifdef __CYGWIN32__
#  ifndef __CYGWIN__
#    define __CYGWIN__
#  endif
#endif

#if (defined _WIN32 || defined _WIN32_WCE) && !defined __GNUC__
# ifdef BUILDING_LIBHELLO
#  ifdef DLL_EXPORT
#   define LIBHELLO_SCOPE extern __declspec (dllexport)
#  endif
# else
#  define LIBHELLO_SCOPE extern __declspec (dllimport)
# endif
#endif
#ifndef LIBHELLO_SCOPE
# define LIBHELLO_SCOPE extern
#endif

/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests.  */
#if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE
/* DATA imports from DLLs on WIN32 can't be const, because runtime
   relocations are performed -- see ld's documentation on pseudo-relocs.  */
# define LT_DLSYM_CONST
#elif defined __osf__
/* This system does not cope well with relocations in const data.  */
# define LT_DLSYM_CONST
#else
# define LT_DLSYM_CONST const
#endif

/* Silly constants that the functions return. */
#define HELLO_RET 0xe110
#define FOO_RET 0xf00

#ifdef __cplusplus
extern "C" {
#endif

int foo (void);
int hello (void);
LIBHELLO_SCOPE int nothing;

#ifdef __cplusplus
}
#endif

#endif
]])

AT_DATA([foo.c],
[[#include <config.h>
#include <stdio.h>
#include <math.h>

#include "foo.h"

/* Give a global variable definition. */
int nothing = FOO_RET;

int foo (void) {
  printf ("cos (0.0) = %g\n", (double) cos ((double) 0.0));
  return FOO_RET;
}
]])

AT_DATA([hell1.c],
[[#include <config.h>
int hell1 (void) { return 1; }
]])

AT_DATA([hell2.c],
[[#include <config.h>
int hell2 (void) { return 2; }
]])

AT_DATA([hello.c],
[[#include <config.h>
#include <stdio.h>

#include "foo.h"

int hello (void) {
  printf ("** This is not GNU Hello. There is no built-in mail reader. **\n");
  return HELLO_RET;
}
]])

AT_DATA([main.c],
[[#include <config.h>
#include <stdio.h>

#include "foo.h"

int main ()
{
  printf ("Welcome to GNU Hell!\n");

  /* Try assigning to the nothing variable. */
  nothing = 1;

  /* Just call the functions and check return values. */
  if (foo () != FOO_RET)
    return 1;

  if (hello () != HELLO_RET)
    return 2;

  return 0;
}
]])

AT_DATA([dlmain.c],
[[#include <config.h>
#include <stdio.h>
#include <string.h>

#include "foo.h"

#define STREQ !strcmp

#define lt_preloaded_symbols lt__PROGRAM__LTX_preloaded_symbols

typedef struct
{
  const char *name;
  void *address;
} lt_dlsymlist;

extern LT_DLSYM_CONST lt_dlsymlist lt_preloaded_symbols[];

int main ()
{
  const lt_dlsymlist *s;
  int (*pfoo)() = 0;
  int (*phello)() = 0;
  int *pnothing = 0;

  printf ("Welcome to *modular* GNU Hell!\n");

  /* Look up the symbols we require for this demonstration. */
  s = lt_preloaded_symbols;
  while (s->name)
    {
      if (s->address) {
        const char *name = s->name;
        printf ("found symbol: %s\n", name);
        if (STREQ ("@INIT@", name))
	  ((void(*)())s->address)();
        if (STREQ ("hello", name))
	  phello = (int(*)())s->address;
        else if (STREQ ("foo", name))
	  pfoo = (int(*)())s->address;
        else if (STREQ ("nothing", name))
#ifndef _WIN32
	  /* In an ideal world we could do this... */
	  pnothing = (int*)s->address;
#else /* !_WIN32 */
	  /* In an ideal world a shared lib would be able to export data */
	  pnothing = (int*)&nothing;
#endif
      } else
        printf ("found file: %s\n", s->name);
      s ++;
    }

  /* Try assigning to the nothing variable. */
  if (pnothing)
    *pnothing = 1;
  else
    fprintf (stderr, "did not find the 'nothing' variable\n");

  /* Just call the functions and check return values. */
  if (pfoo)
    {
      if ((*pfoo) () != FOO_RET)
	return 1;
    }
  else
    fprintf (stderr, "did not find the 'foo' function\n");

  if (phello)
    {
      if ((*phello) () != HELLO_RET)
	return 3;
    }
  else
    fprintf (stderr, "did not find the 'hello' function\n");

  return 0;
}
]])

LT_AT_HOST_DATA([expout],
[[Welcome to GNU Hell!
cos (0.0) = 1
** This is not GNU Hello. There is no built-in mail reader. **
]])

prefix=`pwd`/_inst
]) # _LT_DEMO_SETUP


# _LT_CHECK_EXECUTE([TARGETS])
# ----------------------------
# Run the listed make rules, and check that the built binaries work.
m4_define([_LT_CHECK_EXECUTE],
[LT_AT_CHECK_EXECUTE([$1],
        [./hell_static], [./hell])
AT_CHECK([./helldl$EXEEXT |
    $EGREP '(Welcome to .*GNU Hell|unsupported)'], 0, [ignore])
])


# _LT_CHECK_INSTALL
# -----------------
# Run the make install rule, and check that installed binaries work too.
m4_define([_LT_CHECK_INSTALL],
[# Windows hosts search for dlls in the command path.
PATH=$prefix/lib:$PATH

LT_AT_CHECK_EXECUTE([install],
        [$prefix/bin/hell_static], [$prefix/bin/hell])
AT_CHECK([$prefix/bin/helldl$EXEEXT |
    $EGREP '(Welcome to .*GNU Hell|unsupported)'], 0, [ignore])
])


## ------------ ##
## Demo static. ##
## ------------ ##

AT_SETUP([link against a preloaded static library])

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG([--disable-shared],
                   [^build_old_libs=yes], [^build_libtool_libs=no])
_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL
LT_AT_CHECK_UNINSTALL

AT_CLEANUP


## ------------ ##
## Demo shared. ##
## ------------ ##

AT_SETUP([build and dynamically load a module])

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG([--disable-static],
                   [^build_old_libs=no], [^build_libtool_libs=yes])
_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL
LT_AT_CHECK_UNINSTALL

AT_CLEANUP


## ---------- ##
## Demo conf. ##
## ---------- ##

AT_SETUP([preload static and dynamic module])

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG([],
                   [^build_old_libs=yes], [^build_libtool_libs=yes])
_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL
LT_AT_CHECK_UNINSTALL

AT_CLEANUP


## ------------ ##
## Demo deplib. ##
## ------------ ##

# This is one of the essential tests for deplibs_check_method=pass_all.
# If this one passes with pass_all, it is likely that pass_all works.

AT_SETUP([deplibs_check_method])

AT_CHECK([(exit 77)])

_LT_DEMO_SETUP

AT_DATA([demo.mk],
[[EXTRA_LIBRARIES = libhell0.a
libhell0_a_SOURCES =
libhell0_a_LIBADD = hello.$(OBJEXT) foo.$(OBJEXT)
EXTRA_LTLIBRARIES = libhell1.la libhell2.la
libhell1_la_SOURCES = hell1.c
libhell1_la_LIBADD = -L. -lhell0
libhell1_la_LDFLAGS = -no-undefined -rpath $(libdir)
libhell1_la_DEPENDENCIES = libhell0.a
libhell2_la_SOURCES = hell2.c
libhell2_la_LIBADD = -L. -lhell0
libhell2_la_LDFLAGS = -no-undefined -rpath $(libdir)
libhell2_la_DEPENDENCIES = libhell0.a
EXTRA_PROGRAMS = hell0
hell0_SOURCES = main.c
hell0_LDADD = libhell1.la libhell2.la $(LIBM)

# 'hell0' in EXTRA_PROGRAMS gets translated to 'hell0.exe'; but we
# must explicitly list the wrapper script 'hell0'.  (bin_PROGRAMS
# are handled seamlessly by automake rules; the extra step is only
# necessary for EXTRA_PROGRAMS)
CLEANFILES = $(EXTRA_LIBRARIES) $(EXTRA_LTLIBRARIES) $(EXTRA_PROGRAMS) hell0

deplibs-check: hell0$(EXEEXT)
]])

LT_AT_CHECK_CONFIG([--disable-static])
LT_AT_MAKE([deplibs-check])
LT_AT_EXEC_CHECK([./hell0], 0, [expout])

AT_CLEANUP


## ------------ ##
## Demo nofast. ##
## ------------ ##

AT_SETUP([disable fast install])

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG([--enable-fast-install=no])
AT_CHECK([$EGREP '^hardcode_action=relink' libtool && (exit 77)], 1)

_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL
LT_AT_CHECK_UNINSTALL

AT_CLEANUP


## --------- ##
## Demo pic. ##
## --------- ##

AT_SETUP([force PIC objects])

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG([--enable-pic])
_LT_CHECK_EXECUTE

AT_CLEANUP


AT_SETUP([force PIC objects (old option name)])

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG([--with-pic])
_LT_CHECK_EXECUTE

AT_CLEANUP


## ----------- ##
## Demo nopic. ##
## ----------- ##

AT_SETUP([force non-PIC objects])

AT_CHECK([case $host in
hppa*|amd64*|x86_64*|s390*|mips*|arm*|sparc64*)
  # These hosts cannot use non-PIC shared libs
  exit 77 ;;
*-solaris*|*-sunos*)
  # Libtool does not build non-PIC shared libs on these hosts
  exit 77 ;;
esac

if test "X$build" = "X$host" && test -d "/etc/selinux"; then
	_selinux=`getenforce 2>/dev/null || echo "Disabled"`
	case $_selinux in
	*Enforcing)
		_sebool_allow_execmod=`getsebool allow_execmod 2>/dev/null`
		case $_sebool_allow_execmod in
		*off)
			# SELinux policy disallows non-PIC
			exit 77
			;;
		esac
		;;
	esac
fi
])

_LT_DEMO_SETUP
LT_AT_CHECK_CONFIG([--disable-pic])
_LT_CHECK_EXECUTE

AT_CLEANUP


## -------------- ##
## Demo hardcode. ##
## -------------- ##

AT_SETUP([hardcoding library path])

_LT_DEMO_SETUP

AT_DATA([demo.mk],
[[hardcode_tests = hc-direct hc-libflag hc-libpath hc-minusL
CLEANFILES = $(hardcode_tests)

# Unfortunately, in order to test libtool thoroughly, we need access
# to its private directory.
objdir = `$(LIBTOOL) --config | $(SED) -n -e 's/^objdir=\(.*\)$$/\1/p'`

# Test programs to see what gets hardcoded.
.PHONY: hardcode
hardcode: $(hardcode_tests)
SET_HARDCODE_FLAGS = \
  eval `$(LIBTOOL) --config | $(SED) -n -e '/^hardcode_.*=/p; /^wl=/p'`
hc-direct: $(hell_OBJECTS) $(hell_DEPENDENCIES) $(libdir)/libhello.la
	@rm -f hc-direct
	@echo "You may ignore any linking errors from the following command:"
	@shlib=./$(objdir)/libhello.a; \
	  eval "`$(GREP) '^library_names' libhello.la`"; \
	  for lib in $$library_names; do \
	    shlib="./$(objdir)/$$lib"; \
	  done; \
	  $(SET_HARDCODE_FLAGS); \
	  libdir=$(libdir); \
	  flag=`eval echo \"$$hardcode_libdir_flag_spec\"`; \
	  echo "$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) $$shlib $(LIBS) $(LIBM) $$flag || echo unsupported > $@"; \
	  eval "$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) $$shlib $(LIBS) $(LIBM) $$flag || echo unsupported > $@"

hc-libflag: $(hell_OBJECTS) $(hell_DEPENDENCIES) $(libdir)/libhello.la
	@$(SET_HARDCODE_FLAGS); \
	  libdir=`pwd`/$(objdir); \
	  flag=`eval echo \"$$hardcode_libdir_flag_spec\"`; \
	  if test -z "$$flag"; then \
	    echo "echo unsupported > $@"; \
	    echo unsupported > $@ || status="$$?"; \
	  else \
	    echo "$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) $$flag -L$(libdir) -lhello $(LIBS) $(LIBM)"; \
	    $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) $$flag -L$(libdir) -lhello $(LIBS) $(LIBM) || status="$$?"; \
	  fi; \
	  exit $$status

hc-libpath: $(hell_OBJECTS) $(hell_DEPENDENCIES) $(libdir)/libhello.la
	@rm -f hc-libpath
	@echo "You may ignore any linking errors from the following command:"
	@$(SET_HARDCODE_FLAGS); \
	  eval `$(LIBTOOL) --config | $(GREP) '^shlibpath_var='`; \
	  libdir=$(libdir); \
	  flag=`eval echo \"$$hardcode_libdir_flag_spec\"`; \
	  echo "$$shlibpath_var=./$(objdir) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) -lhello $(LIBS) $(LIBM) $$flag || echo unsupported > $@"; \
	  eval "$$shlibpath_var=./$(objdir) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) -lhello $(LIBS) $(LIBM) $$flag || echo unsupported > $@"

hc-minusL: $(hell_OBJECTS) $(hell_DEPENDENCIES)
	@rm -f hc-minusL
	@$(SET_HARDCODE_FLAGS); \
	  libdir=$(libdir); \
	  flag=`eval echo \"$$hardcode_libdir_flag_spec\"`; \
	  echo "$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) -L./$(objdir) -lhello $(LIBS) $(LIBM) $$flag || echo unsupported > $@"; \
	  eval "$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(hell_OBJECTS) -L./$(objdir) -lhello $(LIBS) $(LIBM) $$flag || echo unsupported > $@"
]])

LT_AT_CHECK_CONFIG([--disable-static])
_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL

eval `$EGREP '^library_names=' libhello.la`
AT_CHECK([test -n "$library_names" || (exit 77)])

# Extra tools we may need
: ${DUMPSTABS="dumpstabs"}

LT_AT_MAKE([hardcode])

eval "`$LIBTOOL --config | $EGREP '^hardcode_(direct|minus_L|shlibpath_var|libdir_flag_spec)='`"

AT_CHECK([[exit_status=0
func_hardcode_filter_fp ()
{
  $FGREP -v "LT_OBJDIR \"$objdir/\"" 2>/dev/null
}
for file in hc-*; do
  case $file in
  hc-direct)  expected="$hardcode_direct" ;;
  hc-libpath) expected="$hardcode_shlibpath_var" ;;
  hc-minusL)  expected="$hardcode_minus_L" ;;

  hc-libflag)
    if test -n "$hardcode_libdir_flag_spec"; then
      expected=yes
    else
      expected=unsupported
    fi
    ;;

  *)
    continue
    ;;
  esac

  # Discover whether the objdir really was hardcoded.
  hardcoded=no

  # Solaris cc may store the command line in a debugging section,
  # which leads to false positives.  Unfortunately, Solaris strip
  # is not capable to remove the section (unlike GNU binutils strip).
  # So we use dumpstabs if it seems to work.
  if { $DUMPSTABS -d $file; } >/dev/null 2>&1; then
    if $DUMPSTABS -d $file 2>/dev/null | $FGREP "$objdir" >/dev/null 2>&1; then
      hardcoded=yes
    else
      hardcoded=no
    fi

  # At least AIX fgrep doesn't work for binary files, and AIX also
  # doesn't have strings(1), so we need this strange conversion
  # (which only works on ASCII).
  # AIX fgrep also has a limited line length, so we turn unprintable
  # characters into newlines.
  elif cat $file | (tr '\000-\037\200-\377' '\n' || cat) 2>/dev/null \
                 | func_hardcode_filter_fp | $FGREP "$objdir" > /dev/null 2>&1; then
    hardcoded=yes

  elif cat $file | func_hardcode_filter_fp | $FGREP "$objdir" > /dev/null 2>&1; then
    # We retry fgrep without tr, in case the above lead to a false negative.
    hardcoded=yes
  elif ($SED -e '1!d' $file | $GREP 'unsupported') >/dev/null 2>&1; then
    hardcoded=unsupported
  fi

  # Check the result.
  case $hardcoded in
  yes)
    if test yes = "$expected"; then
      echo "$objdir was hardcoded in '$file', as libtool expected"
    else
      echo "$objdir was hardcoded in '$file', which fooled libtool" 1>&2
      exit_status=1
    fi
    ;;

  no)
    if test no = "$expected"; then
      echo "$objdir was not hardcoded in '$file', as libtool expected"
    else
      echo "$objdir was not hardcoded in '$file', which fooled libtool" 1>&2
      exit_status=1
    fi
    ;;

  unsupported)
    if test unsupported = "$expected"; then
      echo "'$file' was not linked properly, as libtool expected"
    else
      echo "'$file' was not linked properly, which fooled libtool" 1>&2
      exit_status=1
    fi
    ;;
  esac
done
]], 0, [ignore])

AT_CLEANUP


## ------------ ##
## Demo relink. ##
## ------------ ##

AT_SETUP([binary relinking at install time])
AT_KEYWORDS([interactive])dnl This test causes a popup on Windows

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG
_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL

# Check to make sure we have a dynamic library.
eval `$EGREP '^library_names=' libhello.la`
AT_CHECK([test -n "$library_names" || (exit 77)])

func_save_files
# AIX 5.3 '/bin/sh' will invoke the trap for 0 at the end of a
# function, so we set the trap outside of a function to be portable.
trap func_restore_files 0 1 2 13 15

eval "`$LIBTOOL --config | $EGREP '^shlibpath_overrides_runpath='`"
eval "`$LIBTOOL --config | $EGREP '^hardcode_(action|direct|into_libs)='`"

# Allow the binary to link on-demand if need be.
./hell$EXEEXT >/dev/null || :

# Remove libhello.la from build tree.
rm -f libhello.la "$objdir"/libhello.*

# Either uninstalled ./hell will run using the just installed libraries
# when the uninstalled libs are missing, or relinking at install time
# is necessary, and the uninstalled ./hell has only the uninstalled
# library paths hardcoded.
AT_CHECK([./hell$EXEEXT >/dev/null || test relink,yes = "$hardcode_action,$hardcode_direct"])

# Link an incomplete libhello.la.
LT_AT_MAKE([libhello.la], [libhello_la_OBJECTS=hello.lo])
AT_CHECK([test -f libhello.la])

# Try running uninstalled ./hell with only broken libhello.la in build tree.
# If the following has normal exit status, shlibpath_overrides_runpath is
# wrong, and should be set to 'no' on this host.
# The unusual '|| (exit 1)' is to normalize all non-zero exit statuses.
LT_AT_CHECK([./hell || (exit 1)], 1, [ignore], [ignore])

test relink = "$hardcode_action" ||
test yes = "$shlibpath_overrides_runpath" ||
{
    AT_CHECK([rm -f $objdir/lt-hell$EXEEXT])
    AT_CHECK([cp $objdir/hell$EXEEXT $objdir/lt-hell$EXEEXT])

    # Running demo/hell with installed libhello.la.
    # If the following check fails, then shlibpath_overrides_runpath is
    # wrong, and should be set to 'yes' on this host.
    LT_AT_CHECK([./hell], 0, [expout])
}

func_restore_files

# Undo the effect of the previous 'trap' command. Some shellology:
# We cannot use "trap - 0 1 2 3 13 15", because Solaris sh would attempt to
# execute the command "-". "trap '' ..." is fine only for signal 0 (= normal
# exit); for the others we need to call 'exit' explicitly. The value of $? is
# 128 + signal number and is set before the trap-registered command is run.
trap '' 0
trap 'func_exit $?' 1 2 3 13 15

AT_CLEANUP


## ----------------- ##
## Demo noinst link. ##
## ----------------- ##

AT_SETUP([uninstalled libraries have priority])

_LT_DEMO_SETUP

LT_AT_CHECK_CONFIG
_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL

# Remove libhello.la and hell from build tree.
rm -f libhello.la "hell$EXEEXT"

# If this check fails (i.e. the make succeeds), then the installed library
# was used, which is wrong.
AT_CHECK([$as_unset LIBTOOL; $as_unset LIBTOOLIZE; $MAKE hell$EXEEXT libhello_la_OBJECTS=hello.lo || (exit 1)],
         [1], [ignore], [ignore])

AT_CLEANUP


## ----------- ##
## Pdemo conf. ##
## ----------- ##

AT_SETUP([linking with long file names])

_LT_DEMO_SETUP

AT_DATA([Makefile.am],
[[AUTOMAKE_OPTIONS = no-dependencies foreign
ACLOCAL_AMFLAGS = -I m4

# Build a libtool library, libhello.la for installation in libdir.
lib_LTLIBRARIES = libhello.la
libhello_la_SOURCES = longer_file_name_hello.c longer_file_name_foo.c longer_file_name_foo2.c
libhello_la_LIBADD = $(LIBM)
libhello_la_LDFLAGS = -no-undefined -version-info 3:12:1
libhello_la_CPPFLAGS = $(AM_CPPFLAGS) -DBUILDING_LIBHELLO

include_HEADERS = foo.h

if BINARY_HELLDL
BUILD_helldl = helldl
else
BUILD_helldl =
endif

bin_PROGRAMS = hell hell_static $(BUILD_helldl)

# Build hell from longer_file_name_main.c and libhello.la
hell_SOURCES = longer_file_name_main.c
hell_LDADD = libhello.la

# Create a statically linked version of hell.
hell_static_SOURCES = longer_file_name_main.c
hell_static_LDADD = libhello.la
hell_static_LDFLAGS = $(STATIC)

if BINARY_HELLDL

# Create a version of hell that does a preloaded dlopen.
helldl_SOURCES = longer_file_name_dlmain.c
helldl_LDFLAGS = -export-dynamic -dlpreopen libhello.la
helldl_DEPENDENCIES = libhello.la

else

# Create a script that says that -dlopen is not supported.
bin_SCRIPTS = helldl
helldl helldl$(EXEEXT):
	rm -rf $@
	echo '#! /bin/sh' > $@
	echo 'echo sorry, -dlopen is unsupported' >> $@
	chmod +x $@

endif

libtool: $(LIBTOOL_DEPS)
	$(SHELL) ./config.status --recheck
]])

AT_DATA([main.c],
[[#include <config.h>
#include <stdio.h>

#include "foo.h"

int main ()
{
  printf ("Welcome to GNU Hell!\n");

  /* Try assigning to the nothing variable. */
  nothing = 1;

  /* Just call the functions and check return values. */
  if (foo () != FOO_RET)
    return 1;

  if (foo2 () != FOO_RET)
    return 1;

  if (hello () != HELLO_RET)
    return 2;

  return 0;
}
]])

AT_DATA([foo.h],
[[#ifndef FOO_H
#define FOO_H

/* At some point, cygwin will stop defining __CYGWIN32__, but b19 and
 * earlier do not define __CYGWIN__.  This snippet allows us to check
 * for __CYGWIN__ reliably for both current, old, and (probable) future
 * releases.
 */
#ifdef __CYGWIN32__
#  ifndef __CYGWIN__
#    define __CYGWIN__
#  endif
#endif

#if (defined _WIN32 || defined _WIN32_WCE) && !defined __GNUC__
# ifdef BUILDING_LIBHELLO
#  ifdef DLL_EXPORT
#   define LIBHELLO_SCOPE extern __declspec (dllexport)
#  endif
# else
#  define LIBHELLO_SCOPE extern __declspec (dllimport)
# endif
#endif
#ifndef LIBHELLO_SCOPE
# define LIBHELLO_SCOPE extern
#endif

/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests.  */
#if defined _WIN32 || defined __CYGWIN__ || defined _WIN32_WCE
/* DATA imports from DLLs on WIN32 can't be const, because runtime
   relocations are performed -- see ld's documentation on pseudo-relocs.  */
# define LT_DLSYM_CONST
#elif defined __osf__
/* This system does not cope well with relocations in const data.  */
# define LT_DLSYM_CONST
#else
# define LT_DLSYM_CONST const
#endif

/* Silly constants that the functions return. */
#define HELLO_RET 0xe110
#define FOO_RET 0xf00

#ifdef __cplusplus
extern "C" {
#endif

int foo (void);
int foo2 (void);
int hello (void);
LIBHELLO_SCOPE int nothing;

#ifdef __cplusplus
}
#endif

#endif
]])

AT_DATA([foo2.c],
[[#include <config.h>
#include <stdio.h>
#include <math.h>

#include "foo.h"

int foo2 (void) {
  printf ("foo2 cos (0.0) = %g\n", (double) cos ((double) 0.0));
  return FOO_RET;
}
]])

LT_AT_HOST_DATA([expout],
[[Welcome to GNU Hell!
cos (0.0) = 1
foo2 cos (0.0) = 1
** This is not GNU Hello. There is no built-in mail reader. **
]])

for file in dlmain.c foo.c foo2.c hello.c main.c; do
  mv $file longer_file_name_$file
done

LT_AT_CHECK_CONFIG
_LT_CHECK_EXECUTE
_LT_CHECK_INSTALL

AT_CLEANUP