1 files changed, 110 insertions, 0 deletions
diff --git a/t/depcomp-recover.sh b/t/depcomp-recover.sh
new file mode 100644
index 000000000..486da7f0f
--- /dev/null
+++ b/t/depcomp-recover.sh
@@ -0,0 +1,110 @@
+#! /bin/sh
+# Copyright (C) 2012-2015 Free Software Foundation, Inc.
+#
+# This program 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, or (at your option)
+# any later version.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Dependency tracking:
+#  - we can recover if any .Po file in $(DEPDIR) gets removed;
+#  - in fact, we can recover if the whole $(DEPDIR) directory gets
+#    removed.
+
+required=cc
+. test-init.sh
+
+cat >> configure.ac <<'END'
+AC_PROG_CC
+AC_CONFIG_FILES([sub/Makefile])
+AC_OUTPUT
+END
+
+cat > Makefile.am <<'END'
+SUBDIRS = . sub
+noinst_PROGRAMS = foo
+foo_SOURCES = main.c foo.c foo.h
+get-depdir:
+	@echo '$(DEPDIR)'
+END
+
+cat > main.c <<'END'
+#include "foo.h"
+int main (void)
+{
+  return foo ();
+}
+END
+cat > foo.c <<'END'
+#include "foo.h"
+int foo (void)
+{
+  return 0;
+}
+END
+echo 'int foo (void);' > foo.h
+
+mkdir sub sub/src
+cat > sub/Makefile.am <<'END'
+noinst_PROGRAMS = foo
+foo_SOURCES = src/main.c src/foo.c src/foo.h
+END
+cp main.c foo.c foo.h sub/src
+
+$ACLOCAL
+$AUTOCONF
+$AUTOMAKE -a
+
+for vpath in : false; do
+
+  if $vpath; then
+    srcdir=..
+    mkdir build
+    cd build
+  else
+    srcdir=.
+  fi
+
+  $srcdir/configure --enable-dependency-tracking
+  $MAKE
+  depdir=$($MAKE -s --no-print-directory get-depdir) \
+    && test -n "$depdir" \
+    && test -d $depdir \
+    && test -d sub/src/$depdir \
+    || fatal_ "cannot find the depdir"
+
+  for remove_stuff in \
+    "rm -f $depdir/main.Po" \
+    "rm -f sub/src/$depdir/foo.Po" \
+    "rm -rf $depdir" \
+    "rm -rf $depdir sub/src/$depdir" \
+  ; do
+    $remove_stuff
+    # We can still use make and order a build, even if we have probably
+    # lost the dependency information registered in removed the .Po files.
+    # TODO: maybe we should detect such a situation and force a clean
+    # TODO: rebuild?
+    $MAKE
+    # But if we force a rebuild by hand by cleaning out the existing
+    # objects, everything works out as expected.
+    $MAKE clean
+    $MAKE
+    test -f $depdir/main.Po
+    test -f $depdir/foo.Po
+    test -f sub/src/$depdir/main.Po
+    test -f sub/src/$depdir/foo.Po
+  done
+
+  cd $srcdir
+
+done
+
+: