link-order.test

GNU libtool 是一个通用库支持脚本

#! /bin/sh
# link-order.test - make sure that library linking order matches

# Test script header.
need_prefix=no
if test -z "$srcdir"; then
  srcdir=`echo "$0" | sed 's%/[^/]*$%%'`
  test "$srcdir" = "$0" && srcdir=.
  test "${VERBOSE+set}" != "set" && VERBOSE=yes
fi
. $srcdir/defs || exit 1

retcode=0

eval `$libtool --config | $EGREP '^(hardcode_direct|shrext_cmds)='`
module=no
eval shared_ext=\"$shrext_cmds\"

rm -rf linkorder.dir
mkdir linkorder.dir
top_dir=`pwd`/linkorder.dir
prefix_old=$top_dir/old
prefix_new=$top_dir/new
srcdir=linkorder.dir/src
mkdir $srcdir $prefix_old $prefix_new $prefix_old/lib $prefix_new/lib

cat >$srcdir/c.c <<EOF
int c = 1;
EOF

$libtool --mode=compile $CC $CFLAGS -c $srcdir/c.c -o $srcdir/c.lo
$libtool --mode=link $CC $CFLAGS $LDFLAGS -o $srcdir/libcee.la $srcdir/c.lo \
    -rpath $prefix_old/lib
$libtool --mode=install cp $srcdir/libcee.la $prefix_old/lib/libcee.la

for i in old new; do
  rm -rf $srcdir
  mkdir $srcdir

  cat >$srcdir/a_$i.c <<EOF
extern int c;
extern int b_$i();
int a_$i() { return c + b_$i(); }
EOF

  cat >$srcdir/b_$i.c <<EOF
extern int c;
int b_$i() { return 1 + c; }
EOF

  prefix=`eval echo \\$prefix_$i`
  $libtool --mode=compile $CC $CFLAGS -c $srcdir/a_$i.c -o $srcdir/a.lo
  $libtool --mode=compile $CC $CFLAGS -c $srcdir/b_$i.c -o $srcdir/b.lo
  $libtool --mode=link $CC $CFLAGS $LDFLAGS -o $srcdir/libb.la $srcdir/b.lo \
      -L$prefix_old/lib -lcee -rpath $prefix/lib
  $libtool --mode=link $CC $CFLAGS -o $srcdir/liba.la $srcdir/a.lo \
      $srcdir/libb.la -L$prefix_old/lib -lcee -rpath $prefix/lib
  $libtool --mode=install cp $srcdir/libb.la $prefix/lib/libb.la
  $libtool --mode=install cp $srcdir/liba.la $prefix/lib/liba.la \
      >$srcdir/stdout 2>$srcdir/stderr || retcode=1
  cat $srcdir/stdout
  cat $srcdir/stderr >&2
done

case $host in
*-*-aix* | *-*-interix*) ;; # These systems have different path syntax
*)
  # Do not error if we do not relink (e.g. static-only systems)
  case $hardcode_direct in
  yes)
    if $EGREP relinking $srcdir/stderr; then
      if $EGREP " .*\/new\/lib/libb$shared_ext .*\/old\/lib/libcee$shared_ext" $srcdir/stdout; then :; else
        echo "$0: wrong link order" 1>&2
        retcode=1
      fi
    fi
    ;;
  *)
    if $EGREP relinking $srcdir/stderr; then
      if $EGREP ' -L.*\/new\/lib -lb -L.*\/old\/lib -lcee' $srcdir/stdout; then :; else
        echo "$0: wrong link order" 1>&2
        retcode=1
      fi
    fi
    ;;
  esac
  ;;
esac

for i in old new; do
  cat >$srcdir/main_$i.c <<EOF
extern int a_$i();
int main(void) { return a_$i() != 3; }
EOF

  prefix=`eval echo \\$prefix_$i`
  $libtool --mode=compile $CC $CFLAGS -c $srcdir/main_$i.c -o $srcdir/main_$i.lo
  $libtool --mode=link $CC $CFLAGS $LDFLAGS -o $srcdir/main_$i $srcdir/main_$i.lo \
      -L$prefix/lib -la || retcode=1
  if $srcdir/main_$i; then :
  else
    echo "$0: cannot execute $srcdir/main_$i" 1>&2
    if test "X$host" != "X$build"; then
      echo "This may be ok since you seem to be cross-compiling." 1>&2
      retcode=77
    else
      retcode=1
    fi
  fi
done

rm -rf $top_dir
exit $retcode