Replace AC_SUBST_FILE in configure with include in Makefiles.

* configure.ac (DEPDIR, MKDEPDIR, deps_frag, lwlib_deps_frag)
(oldxmenu_deps_frag, lisp_frag): Remove output variables/files.
(AUTO_DEPEND): New output variable.
* lwlib/Makefile.in (AUTO_DEPEND): New, set by configure.
(DEPFLAGS, MKDEPDIR): Set directly via conditional.
(lwlib_deps_frag): Replace by conditional include.
* lwlib/autodeps.mk: Remove file.
* oldXMenu/Makefile.in (AUTO_DEPEND): New, set by configure.
(DEPFLAGS, MKDEPDIR): Set directly via conditional.
(oldxmenu_deps_frag): Replace by conditional include.
* oldXMenu/autodeps.mk: Remove file.
* src/Makefile.in (AUTO_DEPEND): New, set by configure.
(DEPFLAGS, MKDEPDIR): Set directly via conditional.
(lisp_frag): Replace by an include.
(deps_frag): Replace by conditional include.
* src/autodeps.mk: Remove file.

10 files changed, 49 insertions, 59 deletions

diff --git a/configure.ac b/configure.ac
index 90a40552a35..1cddeb1e45f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1661,9 +1661,7 @@ dnl AC_C_BIGENDIAN is done by gnulib.
 
 dnl check for Make feature
 
-DEPFLAGS=
-MKDEPDIR=":"
-deps_frag=deps.mk
+AUTO_DEPEND=no
 dnl check if we have GCC and autodepend is on.
 if test "$GCC" = yes && test "$ac_enable_autodepend" = yes; then
    AC_MSG_CHECKING([whether gcc understands -MMD -MF])
@@ -1675,24 +1673,10 @@ if test "$GCC" = yes && test "$ac_enable_autodepend" = yes; then
    rm -rf deps.d
    AC_MSG_RESULT([$ac_enable_autodepend])
    if test $ac_enable_autodepend = yes; then
-      DEPFLAGS='-MMD -MF ${DEPDIR}/$*.d -MP'
-      ## MKDIR_P is documented (see AC_PROG_MKDIR_P) to be parallel-safe.
-      MKDEPDIR='${MKDIR_P} ${DEPDIR}'
-      deps_frag=autodeps.mk
+      AUTO_DEPEND=yes
    fi
 fi
-lwlib_deps_frag=$srcdir/lwlib/$deps_frag
-oldxmenu_deps_frag=$srcdir/oldXMenu/$deps_frag
-deps_frag=$srcdir/src/$deps_frag
-AC_SUBST(MKDEPDIR)
-AC_SUBST(DEPFLAGS)
-AC_SUBST_FILE(deps_frag)
-AC_SUBST_FILE(lwlib_deps_frag)
-AC_SUBST_FILE(oldxmenu_deps_frag)
-
-lisp_frag=$srcdir/src/lisp.mk
-AC_SUBST_FILE(lisp_frag)
-
+AC_SUBST(AUTO_DEPEND)
 
 dnl checks for operating system services
 AC_SYS_LONG_FILE_NAMES
diff --git a/lwlib/Makefile.in b/lwlib/Makefile.in
index 1f332e92939..2fd59598e3e 100644
--- a/lwlib/Makefile.in
+++ b/lwlib/Makefile.in
@@ -70,10 +70,15 @@ am__v_at_0 = @
 am__v_at_1 =
 
 DEPDIR = deps
-## -MMD -MF $(DEPDIR)/$*.d if AUTO_DEPEND; else empty.
-DEPFLAGS = @DEPFLAGS@
-## ${MKDIR_P} ${DEPDIR} (if AUTO_DEPEND); else ':'.
-MKDEPDIR = @MKDEPDIR@
+AUTO_DEPEND = @AUTO_DEPEND@
+
+ifeq ($(AUTO_DEPEND),yes)
+DEPFLAGS = -MMD -MF ${DEPDIR}/$*.d -MP
+MKDEPDIR = ${MKDIR_P} ${DEPDIR}
+else
+DEPFLAGS =
+MKDEPDIR = :
+endif
 
 ## ../src is where the generated file (config.h, globals.h) are.
 ## $(srcdir)/../src is where the non-generated files (lisp.h) are.
@@ -102,8 +107,11 @@ globals_h = ../src/globals.h
 $(globals_h):
         $(MAKE) -C ../src globals.h
 
-## Insert either autodeps.mk (if AUTO_DEPEND), else deps.mk.
-@lwlib_deps_frag@
+ifeq ($(AUTO_DEPEND),yes)
+-include $(ALLOBJS:%.o=${DEPDIR}/%.d)
+else
+include $(srcdir)/deps.mk
+endif
 
 .PHONY: mostlyclean clean distclean bootstrap-clean maintainer-clean
 
diff --git a/lwlib/autodeps.mk b/lwlib/autodeps.mk
deleted file mode 100644
index f7109295ce2..00000000000
--- a/lwlib/autodeps.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-### autodeps.mk --- lwlib/Makefile fragment for GNU Emacs
-
-## This is inserted in lwlib/Makefile if AUTO_DEPEND=yes.
-
--include $(ALLOBJS:%.o=${DEPDIR}/%.d)
diff --git a/lwlib/deps.mk b/lwlib/deps.mk
index 11cc0567428..a19e51f34d1 100644
--- a/lwlib/deps.mk
+++ b/lwlib/deps.mk
@@ -20,7 +20,7 @@
 
 ### Commentary:
 
-## This file is inserted in lwlib/Makefile if AUTO_DEPEND=no.
+## This file is included in lwlib/Makefile if AUTO_DEPEND=no.
 ## It defines static dependencies between the various source files.
 
 ### Code:
diff --git a/oldXMenu/Makefile.in b/oldXMenu/Makefile.in
index ef2a3600a6b..de5b8e1114c 100644
--- a/oldXMenu/Makefile.in
+++ b/oldXMenu/Makefile.in
@@ -112,10 +112,15 @@ am__v_at_0 = @
 am__v_at_1 =
 
 DEPDIR = deps
-## -MMD -MF $(DEPDIR)/$*.d if AUTO_DEPEND; else empty.
-DEPFLAGS = @DEPFLAGS@
-## ${MKDIR_P} ${DEPDIR} (if AUTO_DEPEND); else ':'.
-MKDEPDIR = @MKDEPDIR@
+AUTO_DEPEND = @AUTO_DEPEND@
+
+ifeq ($(AUTO_DEPEND),yes)
+DEPFLAGS = -MMD -MF ${DEPDIR}/$*.d -MP
+MKDEPDIR = ${MKDIR_P} ${DEPDIR}
+else
+DEPFLAGS =
+MKDEPDIR = :
+endif
 
 ALL_CFLAGS=$(C_SWITCH_SYSTEM) $(C_SWITCH_MACHINE) \
   $(C_SWITCH_X_SITE) $(DEPFLAGS) \
@@ -132,8 +137,11 @@ libXMenu11.a: $(OBJS) $(EXTRA)
         $(AM_V_at)$(AR) $(ARFLAGS) $@ $(OBJS) $(EXTRA)
         $(AM_V_at)$(RANLIB) $@
 
-## Insert either autodeps.mk (if AUTO_DEPEND), else deps.mk.
-@oldxmenu_deps_frag@
+ifeq ($(AUTO_DEPEND),yes)
+-include $(ALLOBJS:%.o=${DEPDIR}/%.d)
+else
+include $(srcdir)/deps.mk
+endif
 
 .PHONY: mostlyclean clean distclean bootstrap-clean maintainer-clean
 
diff --git a/oldXMenu/autodeps.mk b/oldXMenu/autodeps.mk
deleted file mode 100644
index f7109295ce2..00000000000
--- a/oldXMenu/autodeps.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-### autodeps.mk --- lwlib/Makefile fragment for GNU Emacs
-
-## This is inserted in lwlib/Makefile if AUTO_DEPEND=yes.
-
--include $(ALLOBJS:%.o=${DEPDIR}/%.d)
diff --git a/oldXMenu/deps.mk b/oldXMenu/deps.mk
index cdb89f9ead9..54ce3587574 100644
--- a/oldXMenu/deps.mk
+++ b/oldXMenu/deps.mk
@@ -32,7 +32,7 @@
 
 ### Commentary:
 
-## This file is inserted in oldXMenu/Makefile if AUTO_DEPEND=no.
+## This file is included in oldXMenu/Makefile if AUTO_DEPEND=no.
 ## It defines static dependencies between the various source files.
 
 ### Code:
diff --git a/src/Makefile.in b/src/Makefile.in
index 1c03b27c2c3..51a5b982474 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -323,10 +323,15 @@ am__v_at_0 = @
 am__v_at_1 =
 
 DEPDIR=deps
-## -MMD -MF $(DEPDIR)/$*.d if AUTO_DEPEND; else empty.
-DEPFLAGS=@DEPFLAGS@
-## ${MKDIR_P} ${DEPDIR} (if AUTO_DEPEND); else ':'.
-MKDEPDIR=@MKDEPDIR@
+AUTO_DEPEND = @AUTO_DEPEND@
+
+ifeq ($(AUTO_DEPEND),yes)
+DEPFLAGS = -MMD -MF ${DEPDIR}/$*.d -MP
+MKDEPDIR = ${MKDIR_P} ${DEPDIR}
+else
+DEPFLAGS =
+MKDEPDIR = :
+endif
 
 ## DO NOT use -R.  There is a special hack described in lastfile.c
 ## which is used instead.  Some initialized data areas are modified
@@ -413,9 +418,7 @@ otherobj= $(TERMCAP_OBJ) $(PRE_ALLOC_OBJ) $(GMALLOC_OBJ) $(RALLOC_OBJ) \
 FIRSTFILE_OBJ=@FIRSTFILE_OBJ@
 ALLOBJS = $(FIRSTFILE_OBJ) $(VMLIMIT_OBJ) $(obj) $(otherobj)
 
-## Configure inserts the file lisp.mk at this point, defining $lisp.
-@lisp_frag@
-
+include $(srcdir)/lisp.mk
 
 ## Construct full set of libraries to be linked.
 LIBES = $(LIBS) $(W32_LIBS) $(LIBS_GNUSTEP) $(LIBX_BASE) $(LIBIMAGE) \
@@ -667,8 +670,10 @@ endif
         @: Compile some files earlier to speed up further compilation.
         $(MAKE) -C ../lisp compile-first EMACS="$(bootstrap_exe)"
 
-## Insert either autodeps.mk (if AUTO_DEPEND), else deps.mk.
-@deps_frag@
-
+ifeq ($(AUTO_DEPEND),yes)
+-include $(ALLOBJS:%.o=${DEPDIR}/%.d)
+else
+include $(srcdir)/deps.mk
+endif
 
 ### Makefile.in ends here
diff --git a/src/autodeps.mk b/src/autodeps.mk
deleted file mode 100644
index 8b014a7508c..00000000000
--- a/src/autodeps.mk
+++ /dev/null
@@ -1,5 +0,0 @@
-### autodeps.mk --- src/Makefile fragment for GNU Emacs
-
-## This is inserted in src/Makefile if AUTO_DEPEND=yes.
-
--include $(ALLOBJS:%.o=${DEPDIR}/%.d)
diff --git a/src/deps.mk b/src/deps.mk
index 71a5f42d22e..23789384fdb 100644
--- a/src/deps.mk
+++ b/src/deps.mk
@@ -20,7 +20,7 @@
 
 ## Commentary:
 ##
-## This file is inserted in src/Makefile if AUTO_DEPEND=no.
+## This file is included in src/Makefile if AUTO_DEPEND=no.
 ## It defines static dependencies between the various source files.
 
 ## FIXME some of these dependencies are platform-specific.