FLEX_V_ = $(FLEX_V_@AM_DEFAULT_V@)
FLEX_V_0 = @printf ' %$(DX_ALIGN_V)s %s\n' 'FLEX ' $<;
-.y.c: ;
-.l.c: ;
+DEV_TOOL_ERROR = { \
+ echo "ERROR: *** $$tool is missing on your system."; \
+ echo " *** Because of this, I cannot compile $$toolsrc, but"; \
+ echo " *** (perhaps because you modified it) the sources appear out"; \
+ echo " *** of date. If $$tool is installed but was not detected by"; \
+ echo " *** configure, consired setting $$toolvar and re-running configure."; \
+ echo " *** See config.log for more details."; } >&2; false
+.y.c: ;
.y.stamp:
+if !HAVE_BISON
+ $(BISON_V)tool=bison toolvar=BISON toolsrc=$<; $(DEV_TOOL_ERROR)
+endif
$(AM_V_at) touch $@.tmp
$(BISON_V) $(BISON) $(BISON_COMPAT) -o $*.c --defines=$*.h.tmp $(BISONFLAGS) $<
$(AM_V_at) if cmp $*.h.tmp $*.h >/dev/null 2>&1; then \
fi
$(AM_V_at) mv -f $@.tmp $@
+.l.c: ;
.l.stamp:
+if !HAVE_FLEX
+ $(FLEX_V)tool=flex toolvar=FLEX toolsrc=$<; $(DEV_TOOL_ERROR)
+endif
$(AM_V_at) touch $@.tmp
$(FLEX_V) $(FLEX) -o $*.c --header-file=$*.h.tmp $(FLEXFLAGS) $<
$(AM_V_at) if cmp $*.h.tmp $*.h >/dev/null 2>&1; then \
AM_GNU_GETTEXT([external])
DX_LINGUAS
-DX_PROG_FLEX([], [], [FLEX=false])
-DX_PROG_BISON([], [], [BISON=false])
+DX_PROG_FLEX([], [have_flex=yes], [have_flex=no])
+AM_CONDITIONAL([HAVE_FLEX], [test x"$have_flex" = x"yes"])
+
+DX_PROG_BISON([], [have_bison=yes], [have_bison=no])
+AM_CONDITIONAL([HAVE_BISON], [test x"$have_bison" = x"yes"])
+
DX_BISON_COMPAT
BISON_I18N