# static.at -- test flags for static/dynamic linking          -*- Autotest -*-
#
#   Copyright (C) 2006, 2007, 2008 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.
####

##### NOTES #####
#
# - How do we test whether a library was linked statically?
#   We could
#   - try $NM on the program to see whether it includes the symbol definitions.
#     disadvantage: for uninstalled programs, we may need to find out the name
#     of the _real_ linked-against-uninstalled executable
#     (.libs/prog vs .libs/lt-prog etc).
#   - simply remove the libraries before execution.  If the program still works,
#     then the library was linked statically.
#     -Does this work on all systems?
#     -No, it will fail on AIX with non-rtl-created libraries: plain `-static'
#     will only cause the linker not to consider `*.so' libraries, but only
#     `*.a'.  The latter, however, may still be shared images.  :-/
#     `-all-static' still works, however.
#   
#     It will not work with dlpreloading until we fix its related bug.
#   
#   Let's try the latter until we know better.

# - Test -Bstatic/-Bdynamic.  It should work with all of:
#   - (un)installed libtool libraries
#   - non-libtool libraries
#   - direct or pulled-in libraries
#   - libraries of which there are only one kind available (TODO)
#     (in the static case, should having only the shared one provoke failure?)

# - Check no extraneous run paths have been added.

# - make sure -Bstatic/-Bdynamic cannot be mixed with -all-static (TODO)

# - should -Bstatic/-Bdynamic be mixable with -static or -static-libtool-libs?
#   Semantics could be as follows:
#   - `-static'/`-static-libtool-libs' set the default which is the initial
#     value, then `-Bstatic'/`-Bdynamic' override that
#   - `-Bdefault' resets to the default value given by the other switches.

# - TODO: test exposure for dlopened and dlpreopened modules,
#   without and with diverse static flag combinations.

# - TODO: test other tags: C++ etc.
#   (most likely the Sun compiler suite will be the only problem child).

AT_SETUP([static linking flags for programs])
AT_KEYWORDS([libtool])

LDFLAGS="$LDFLAGS -no-undefined"
prefix=`pwd`/inst
bindir=$prefix/bin
prefix1=`pwd`/inst1
prefix2=`pwd`/inst2
prefix3=`pwd`/inst3
libdir1=$prefix1/lib
libdir2=$prefix2/lib
libdir3=$prefix3/lib
srcdir_broken=`pwd`/broken-src
prefix_broken=`pwd`/broken
libdir_broken=$prefix_broken/lib
bindir_broken=$prefix_broken/bin

have_static=false
have_shared=false
per_deplib=false
$LIBTOOL --features | grep 'enable static libraries' >/dev/null && have_static=:
$LIBTOOL --features | grep 'enable shared libraries' >/dev/null && have_shared=:
eval `$LIBTOOL --config |
        $EGREP '^(per_deplib_(static|dynamic)_flag|shlibpath_var|link_static_flag)='`
if test -n "$per_deplib_static_flag" && test -n "$per_deplib_dynamic_flag"; then
  per_deplib=:
fi
# On GNU/Linux with --disable-static, m-all-static fails to link.
# What we'd like to state here is: if the user actively passed
# --disable-static (as opposed to: the libtool.m4 macros set
# enable_static=no), then they cannot expect -all-static to work.
# So we punt, knowing that we mangle enable_static on AIX only.
can_link_all_static=-all-static
case $host_os,$have_static,$link_static_flag in
  aix*) ;;
  *,false,?*) can_link_all_static= ;;
esac

# Create broken libraries.  They will later be moved to those
# directories where the respective libraries should be linked
# statically from.  This detects both failure to link statically
# and failure to omit extraneous run paths.
mkdir $srcdir_broken $prefix_broken $libdir_broken
(
  cd $srcdir_broken
  echo 'int this_should_not_be_linked_against() { return 0; }' > a.c
  $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c a.c
  for i in 1 1dep 2 2dep 3 3dep; do
    $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o liba$i.la a.lo -rpath $libdir_broken
    $LIBTOOL --mode=install cp liba$i.la $libdir_broken/liba$i.la
  done
)

func_fix_path ()
{
  # For w32, hardcoding cannot work, but $libdir/../bin is where binaries
  # usually are installed.  Since we use several prefixes for testing
  # convenience -- it allows us to replace the good libraries easily with
  # broken ones and vice versa -- we have to set PATH to find them.
  # Since OTOH we put broken libs of all names in the "moved" prefixes,
  # we have to ensure that this prefix comes last: otherwise we may link
  # against a broken library but the good one would come later in the PATH.
  # So we let the caller of this function set the order: the "other" two
  # come first.
  if test "$shlibpath_var" = PATH; then
    save_PATH=$PATH
    sep=
    test -z "$PATH" || sep=:
    PATH=${2}/bin:${3}/bin:${1}/bin$sep$PATH
  fi

}

func_restore_path ()
{
  if test "$shlibpath_var" = PATH; then
    PATH=$save_PATH
  fi
}

# func_move_libs srcdir_to_move prefix_to_move other_prefix other_prefix
func_move_libs ()
{
  LT_AT_MVDIR(["${1}"], ["${1}-moved"])
  LT_AT_MVDIR(["${2}"], ["${2}-moved"])
  LT_AT_MVDIR(["$srcdir_broken"], ["${1}"])
  LT_AT_MVDIR(["$prefix_broken"], ["${2}"])
  func_fix_path ${2} ${3} ${4}
}

# func_restore_libs srcdir_to_restore prefix_to_restore
func_restore_libs ()
{
  func_restore_path
  LT_AT_MVDIR(["${2}"], ["$prefix_broken"])
  LT_AT_MVDIR(["${1}"], ["$srcdir_broken"])
  LT_AT_MVDIR(["${2}-moved"], ["${2}"])
  LT_AT_MVDIR(["${1}-moved"], ["${1}"])
}

# make sure the program can be run.
func_test_exec ()
{
  # On AIX without runtimelinking, this does not make sense.
  if $have_static; then
    echo "## The following should succeed:"
    for st
    do
      echo "# m$st"
      LT_AT_EXEC_CHECK([./m$st])
      # For some per-deplib flag combinations there may be no installed program,
      # because liba2 is not yet installed.
      if test -f "$bindir/m$st"; then
	LT_AT_EXEC_CHECK([$bindir/m$st])
      fi
    done
  fi
}

# make sure the program cannot be run.
func_test_exec_fail ()
{
  # No point in testing if we're linking statically anyway.
  # TODO: Maybe in the `else' case we could test for success?
  if $have_shared; then
    echo "## The following should fail:"
    for st
    do
      echo "# m$st"
      LT_AT_EXEC_CHECK([./m$st || (exit 1)], [1], [], [ignore])
      # For some per-deplib flag combinations there may be no installed program,
      # because liba2 is not yet installed.
      if test -f "$bindir/m$st"; then
	LT_AT_EXEC_CHECK([$bindir/m$st || (exit 1)], [1], [], [ignore])
      fi
    done
  fi
}


# Try three independent libraries,
#   one installed libtool library,
#   one uninstalled libtool library,
#   one non-libtool library,
# the libtool libraries each having a dependency, or not.
# Try both an uninstalled and the corresponding installed program.

for withdep in no yes; do
  echo
  echo "### libraries with dependencies: $withdep"
  rm -rf src $prefix $prefix1 $prefix2 $prefix3
  mkdir src $prefix $bindir $prefix1 $prefix2 $prefix3
  cd src

  ### build the libraries.
  for i in 1 2 3; do
    eval ldir=\$libdir$i
    mkdir a$i $ldir
    cd a$i
    case $withdep,$i in
    no,* | yes,3)
      echo "int a$i() { return 0; }" > a$i.c
      $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c a$i.c
      $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o liba$i.la a$i.lo -rpath $ldir
      ;;
    *)
      echo "int a${i}dep() { return 0; }" > a${i}dep.c
      $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c a${i}dep.c
      $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o liba${i}dep.la a${i}dep.lo -rpath $ldir
      echo "extern int a${i}dep(); int a$i() { return a${i}dep(); }" > a$i.c
      $LIBTOOL --mode=compile $CC $CPPFLAGS $CFLAGS -c a$i.c
      $LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o liba$i.la a$i.lo -rpath $ldir ./liba${i}dep.la
      ;;
    esac
    cd ..
  done

  ### install the libraries.
  test "$withdep" = yes && $LIBTOOL --mode=install cp a1/liba1dep.la $libdir1/liba1dep.la
  $LIBTOOL --mode=install cp a1/liba1.la $libdir1/liba1.la
  $LIBTOOL --mode=install cp a3/liba3.la $libdir3/liba3.la
  $LIBTOOL --mode=clean rm -f a1/liba1.la a3/liba3.la
  test "$withdep" = yes && $LIBTOOL --mode=clean rm -f a1/liba1dep.la 
  # simulate a non-libtool lib:
  rm -f $libdir3/liba3.la


  ### build the programs.
  echo 'extern int a1(), a2(), a3();
  int main() { return a1() + a2() + a3(); }' > m.c
  $CC $CPPFLAGS $CFLAGS -c m.c

  # global static flags.
  for st in -static -static-libtool-libs $can_link_all_static; do
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS $st -o m$st m.$OBJEXT \
	-L$libdir1 -la1 a2/liba2.la -L$libdir3 -R$libdir3 -la3],
       [0], [ignore], [ignore])
  done

  # per-deplib static/shared flags.
  # also try a bit redundant flags, and shuffled order (for run paths check).
  if $per_deplib; then
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m1 m.$OBJEXT \
	      -L$libdir1 -Bstatic -la1 -Bdynamic a2/liba2.la -L$libdir3 -R$libdir3 -la3],
	     [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m2 m.$OBJEXT \
	      -L$libdir1 -la1 -Bstatic a2/liba2.la -Bdynamic -L$libdir3 -R$libdir3 -la3],
	     [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m3 m.$OBJEXT \
	      -L$libdir1 -la1 a2/liba2.la -L$libdir3 -Bstatic -la3 -Bdynamic],
	     [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m12 m.$OBJEXT \
	      -L$libdir1 -Bstatic -la1 a2/liba2.la -Bdynamic -L$libdir3 -R$libdir3 -la3],
	      [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m13 m.$OBJEXT \
	      -L$libdir1 -Bstatic -la1 -Bdynamic a2/liba2.la \
	      -L$libdir3 -Bstatic -la3 -Bdynamic],
	      [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m31 m.$OBJEXT \
	      -L$libdir3 -Bstatic -la3 -Bdynamic a2/liba2.la \
	      -L$libdir1 -Bstatic -la1 -Bdynamic],
	      [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m23 m.$OBJEXT \
	      -L$libdir1 -la1 -Bstatic a2/liba2.la -Bdynamic \
	      -L$libdir3 -Bstatic -la3 -Bdynamic],
	      [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m123 m.$OBJEXT \
	      -L$libdir1 -Bstatic -la1 a2/liba2.la -L$libdir3 -la3 -Bdynamic],
	      [0], [ignore], [ignore])
    AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m123a m.$OBJEXT \
	      -L$libdir1 -Bstatic -la1 -Bdynamic -Bstatic a2/liba2.la -Bdynamic \
	      -Bstatic -L$libdir3 -la3 -Bdynamic],
	      [0], [ignore], [ignore])
    dnl # This usually fails.  So don't do it.
    dnl AT_CHECK([$LIBTOOL --mode=link $CC $CFLAGS $LDFLAGS -o m123b m.$OBJEXT \
    dnl 	 -L$libdir1 -Bstatic -la1 a2/liba2.la -L$libdir3 -la3],
    dnl 	 [0], [ignore], [ignore])
  fi

  ### install the programs.
  # We can't install any program that links dynamically against liba2.
  for st in -static -static-libtool-libs $can_link_all_static `$per_deplib && echo 2 12 23 123 123a`; do 
    echo "# m$st"
    AT_CHECK([$LIBTOOL --mode=install cp m$st $bindir/m$st], [0], [ignore], [stderr])
    if $have_static; then
      AT_CHECK([$EGREP 'relinking|has not been installed' stderr], [1], [], [])
    fi
  done
  dnl AT_CHECK([$LIBTOOL --mode=install cp m123b $bindir/m123b], [0], [ignore], [ignore])


  ### Run each program once so that relinking has happened.
  
  func_fix_path $prefix1 $prefix2 $prefix3
  func_test_exec -static -static-libtool-libs -all-static `$per_deplib && echo 1 2 3 12 13 23 31 123 123a`
  func_restore_path

  # For each library:
  # - remove the library images to catch failure to link statically/dynamically,
  # - add false other deplibs in the paths to catch (some) wrongly added run paths.

  # if -all-static does not work, do not exercise it any more.
  all_static=-all-static
  test -z "$link_static_flag" && all_static=

  echo "### test whether installed libtool library liba2 was linked statically"
  func_move_libs a2 $prefix2 $prefix3 $prefix1
  func_test_exec -static -static-libtool-libs $all_static `$per_deplib && echo 2 12 23 123 123a`
  $per_deplib && func_test_exec_fail 1 3 13 31
  func_restore_libs a2 $prefix2

  echo "### test whether uninstalled libtool library liba1 was linked statically"
  func_move_libs a1 $prefix1 $prefix2 $prefix3
  func_test_exec -static-libtool-libs $all_static `$per_deplib && echo 1 12 13 31 123 123a`
  $per_deplib && func_test_exec_fail -static 2 3 23
  func_restore_libs a1 $prefix1

  echo "### test whether non-libtool library liba3 was linked statically"
  func_move_libs a3 $prefix3 $prefix1 $prefix2
  func_test_exec $all_static `$per_deplib && echo 3 13 23 31 123 123a`
  func_test_exec_fail -static -static-libtool-libs `$per_deplib && echo 1 2 12`
  func_restore_libs a3 $prefix3

  cd ..
done

AT_CLEANUP


AT_SETUP([ccache -all-static])

AT_DATA([ccache],
[[#! /bin/sh
# poor man's ccache clone
case $1 in
-*) echo "bogus argument: $1" >&2; exit 1 ;;
esac
exec "$@"
]])
chmod +x ./ccache

AT_DATA([a.c],
[[int main(void) { return 0; }
]])

AT_CHECK([$CC $CPPFLAGS $CFLAGS -c a.c], [], [ignore])
AT_CHECK([$LIBTOOL --mode=link --tag=CC ./ccache $CC $CFLAGS $LDFLAGS -all-static a.$OBJEXT -o a],
	 [], [ignore], [ignore])

AT_CLEANUP