Makefiles: Add a default BISONFLAGS variable for widl, wmc, wrc and wpp.

[Robert Shearman]

They all allow debugging to be turned on by the user and this doesn't 
work without passing the "-t" flag to BISON.
---
  libs/wpp/Makefile.in   |    2 ++
  tools/widl/Makefile.in |    2 ++
  tools/wmc/Makefile.in  |    2 ++
  tools/wrc/Makefile.in  |    2 ++
  4 files changed, 8 insertions(+), 0 deletions(-)
-------------- next part --------------
diff --git a/libs/wpp/Makefile.in b/libs/wpp/Makefile.in
index 5d818b7..1bf581a 100644
--- a/libs/wpp/Makefile.in
+++ b/libs/wpp/Makefile.in
@@ -4,6 +4,8 @@ SRCDIR    = @srcdir@
 VPATH     = @srcdir@
 MODULE    = libwpp.a
 
+BISONFLAGS = -t
+
 C_SRCS = \
 	preproc.c \
 	wpp.c
diff --git a/tools/widl/Makefile.in b/tools/widl/Makefile.in
index 64aaedb..e6c13f9 100644
--- a/tools/widl/Makefile.in
+++ b/tools/widl/Makefile.in
@@ -8,6 +8,8 @@ PROGRAMS = widl$(EXEEXT)
 MANPAGES = widl.man
 MODULE   = none
 
+BISONFLAGS = -t
+
 C_SRCS = \
 	client.c \
 	hash.c \
diff --git a/tools/wmc/Makefile.in b/tools/wmc/Makefile.in
index 5f347da..de492c0 100644
--- a/tools/wmc/Makefile.in
+++ b/tools/wmc/Makefile.in
@@ -8,6 +8,8 @@ PROGRAMS = wmc$(EXEEXT)
 MANPAGES = wmc.man
 MODULE   = none
 
+BISONFLAGS = -t
+
 C_SRCS = \
 	lang.c \
 	mcl.c \
diff --git a/tools/wrc/Makefile.in b/tools/wrc/Makefile.in
index e0efa18..8c4c925 100644
--- a/tools/wrc/Makefile.in
+++ b/tools/wrc/Makefile.in
@@ -9,6 +9,8 @@ PROGRAMS = wrc$(EXEEXT)
 MANPAGES = wrc.man
 MODULE   = none
 
+BISONFLAGS = -t
+
 C_SRCS = \
 	dumpres.c \
 	genres.c \