# link-order2.at -- test link order of deplibs                -*- Autotest -*-
#
#   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
#   Written by Ralf Wildenhues, 2006
#
#   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; see the file COPYING.  If not, a copy
# can be downloaded from  http://www.gnu.org/licenses/gpl.html,
# or obtained by writing to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
####

# link-order2.test: make sure that depdepls are added right after
# the libs that pull them in: necessary at least for static linking
# and on systems where libraries do not link against other libraries.
#
# We test by overriding one symbol from a depdepl library.
# Test both a libtool library and a non-libtool library (simulated
# by removing the .la file, and setting $shlibpath_var so it is
# found at runtime).  In order to ensure that the depdepl is
# actually loaded in each case, we also use an unrelated symbol
# from it directly in the main program.  We test for failure by
# reversing the link order.
# We test both static and shared: it should work in both cases.  
# But for the static case to work, the two symbols in the depdepl
# need to be in separate object files, otherwise duplicate symbol
# definitions can happen.

# The shared case fails on AIX without runtimelinking and on Darwin.
# On Darwin, using shared libs this only works without -no-undefined
# and only with MACOS_DEPLOYMENT_TARGET 10.2 and earlier
# (in that case $allow_undefined_flag contains -flat_namespace).

AT_SETUP([Link order of deplibs.])
AT_KEYWORDS([libtool])

eval `$LIBTOOL --config | $EGREP '^(shlibpath_var|allow_undefined_flag)='`

undefined_setting=-no-undefined
shared_fails=no
case $host_os,$LDFLAGS,$allow_undefined_flag in
aix*,*-brtl*,*) ;;
aix*) shared_fails=yes ;;
darwin*,*,*-flat_namespace*) undefined_setting= ;;
darwin*,*,*) shared_fails=yes ;;
esac

deflibdir=`pwd`/lib
defbindir=`pwd`/lib
libdir=`pwd`/inst/lib
bindir=`pwd`/inst/bin
mkdir bin lib inst inst/bin inst/lib
LDFLAGS="$LDFLAGS $undefined_setting -L$deflibdir"

cat >a0.c <<\EOF
int a (void) { return 1; }
EOF

cat >a1.c <<\EOF
int a (void) { return 0; }
EOF

cat >b.c <<\EOF
int a (void);
int b (void) { return a (); }
EOF

cat >main.c <<\EOF
#include <stdlib.h>
extern int a (void);
extern int b (void);
int main (void)
{
  return a () + b ();
}
EOF

for file in a0 a1 b; do
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c $file.c
done
$CC $CPPFLAGS $CFLAGS -c main.c

# Build an old, installed library.
$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o liba0.la a0.lo -rpath $deflibdir
$LIBTOOL --mode=install cp liba0.la $deflibdir/liba0.la
$LIBTOOL --mode=clean rm -f liba0.la

for type_of_depdepl in libtool non-libtool; do
  echo "type of depdepl: $type_of_depdepl"
  if test $type_of_depdepl = non-libtool; then
    # Simulate a non-Libtool system library.
    rm $deflibdir/liba1.la
    addpath=$deflibdir
    if test "$shlibpath_var" = PATH; then
      addpath=$defbindir
    fi
    sep=
    eval test -n \"\$$shlibpath_var\" && sep=:
    eval $shlibpath_var='$addpath$sep$'$shlibpath_var
    export $shlibpath_var
  fi
  for static in '' -static-libtool-libs; do
    case `$LIBTOOL --features` in
    *disable\ static\ libraries*) test "$static" = '' || continue;;
    esac
    test "$type_of_depdepl,$static" = "non-libtool,-static-libtool-libs" &&
       static=-all-static
    $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o liba1.la a1.lo -rpath $libdir
    $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o libb.la b.lo liba1.la -rpath $libdir
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o main main.$OBJEXT libb.la -la0],
	     [], [ignore], [ignore])
    LT_AT_EXEC_CHECK([./main])
    # Now test that if we reverse the link order, the program fails.
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $static -o wrong main.$OBJEXT -la0 libb.la],
	     [], [ignore], [ignore])
    if test $shared_fails,$static != yes,; then
      LT_AT_EXEC_CHECK([./wrong], [2])
    fi

    $LIBTOOL --mode=install cp liba1.la $libdir/liba1.la
    $LIBTOOL --mode=install cp libb.la $libdir/libb.la
    $LIBTOOL --mode=install cp main $bindir/main
    $LIBTOOL --mode=install cp wrong $bindir/wrong
    $LIBTOOL --mode=clean rm -f liba1.la libb.la
    LT_AT_EXEC_CHECK([$bindir/main])
    if test $shared_fails,$static != yes,; then
      LT_AT_EXEC_CHECK([$bindir/wrong], [2])
    fi
  done
done

AT_CHECK([test $shared_fails = no || (exit 77)])

# Now the converse: if both the program and the library need libm, then
# it needs to be sorted last.  (TODO)

AT_CLEANUP