Use $(PERL) instead of simply `perl' (pointed out by John Burnell)

git-svn-id: https://svn.dealii.org/trunk@3307 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/common/scripts/forward_declarations b/deal.II/common/scripts/forward_declarations
index a3b4ee632042fd231a721bceb527edde617822b1..b697e6a0c82f7eb80a006ef247d632f20c0a002c 100644 (file)
--- a/deal.II/common/scripts/forward_declarations
+++ b/deal.II/common/scripts/forward_declarations
@@ -23,7 +23,7 @@ $(forward-declarations): $(filter-out %forward-declarations%,$(h-files)) \
        @echo ============================ Remaking $(@F)
        @touch $@.old
        @-cp $@ $@.old > /dev/null 2>&1
-       @perl $D/common/scripts/forward_declarations.pl   \
+       @$(PERL) $D/common/scripts/forward_declarations.pl   \
               $(filter-out %$(notdir $(forward-declarations)),$(h-files)) \
             > $@.new
        @if test -n "`diff $(forward-declarations).old $(forward-declarations).new`" ; then \