2008-07-30 Paolo Bonzini <bonzini@gnu.org>

	* configure.ac: Add makefile fragments for hpux.
	* Makefile.def (flags_to_pass): Add ADA_CFLAGS.
	* Makefile.tpl (HOST_EXPORTS): Pass ADA_CFLAGS.
	* configure: Regenerate.
	* Makefile.in: Regenerate.

config:
2008-07-30  Paolo Bonzini  <bonzini@gnu.org>

	* mh-pa: New, from gcc/config/pa/x-ada.
	* mh-pa-hpux10: New, from gcc/config/pa/x-ada-hpux10.

gcc:
2008-07-30  Paolo Bonzini  <bonzini@gnu.org>

	* configure.ac: Substitute ADA_CFLAGS.
	* configure: Regenerate.
	* config.host: Remove mention of pa/x-ada and pa/x-ada-hpux10 files.
	* Makefile.in: Remove mention of X_* variables.
	* config/pa/x-ada-hpux10: Remove.
	* config/pa/x-ada: Remove.

	* doc/fragments.texi: Update.

gcc/ada:
2008-07-30  Paolo Bonzini  <bonzini@gnu.org>

	* gcc-interface/Make-lang.in (ALL_ADAFLAGS): Remove X_ADAFLAGS and
	T_ADAFLAGS, replace ALL_ADA_CFLAGS with ADA_CFLAGS.
	(ALL_ADA_CFLAGS): Remove, replace throughout with ADA_CFLAGS.
	* gcc-interface/Makefile.in (XCFLAGS, X_CFLAGS, X_CPPFLAGS, T_CPPFLAGS,
	X_ADA_CFLAGS, T_ADA_CFLAGS, X_ADAFLAGS, T_ADAFLAGS, ADA_CFLAGS,
	ALL_ADA_CFLAGS): Remove.
	(ALL_ADAFLAGS, MOST_ADAFLAGS): Remove X_ADAFLAGS and T_ADAFLAGS,
        replace ALL_ADA_CFLAGS with ADA_CFLAGS.
	(GCC_CFLAGS): Remove X_CFLAGS.
	(LOOSE_CFLAGS): Remove X_CFLAGS and XCFLAGS.
	(ALL_CPPFLAGS): Remove X_CPPFLAGS and T_CPPFLAGS.
	(ADA_CFLAGS): Substitute.
	
gnattools:
2008-07-30  Paolo Bonzini  <bonzini@gnu.org>

	* configure.ac (x_ada_cflags): Remove.
	(ADA_CFLAGS): Substitute.
	* configure: Regenerate.
	* Makefile.in (ADA_CFLAGS): Substitute.
	(T_ADA_CFLAGS, X_ADA_CFLAGS, ALL_ADA_CFLAGS): Remove.
	(TOOLS_FLAGS_TO_PASS_1, TOOLS_FLAGS_TO_PASS_1re,
	TOOLS_FLAGS_TO_PASS_NATIVE, TOOLS_FLAGS_TO_PASS_CROSS):
	Pass ADA_CFLAGS.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@138301 138bc75d-0d04-0410-961f-82ee72b054a4

ChangeLog

@@ -1,3 +1,11 @@
+2008-07-30 Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac: Add makefile fragments for hpux.
+	* Makefile.def (flags_to_pass): Add ADA_CFLAGS.
+	* Makefile.tpl (HOST_EXPORTS): Pass ADA_CFLAGS.
+	* configure: Regenerate.
+	* Makefile.in: Regenerate.
+
 2008-07-28 Aldy Hernandez <aldyh@redhat.com>
 
 	* MAINTAINERS: Add Jakub and myself as gimple maintainers.

Makefile.def

@@ -226,6 +226,7 @@ flags_to_pass = { flag= YACC ; };
 
 // Host tools
 flags_to_pass = { flag= ADAFLAGS ; optional=true ; };
+flags_to_pass = { flag= ADA_CFLAGS ; };
 flags_to_pass = { flag= AR_FLAGS ; };
 flags_to_pass = { flag= BOOT_ADAFLAGS ; optional=true ; };
 flags_to_pass = { flag= BOOT_CFLAGS ; };

Makefile.in

@@ -164,6 +164,7 @@ HOST_SUBDIR = @host_subdir@
 HOST_EXPORTS = \
 	$(BASE_EXPORTS) \
 	CC="$(CC)"; export CC; \
+	ADA_CFLAGS="$(ADA_CFLAGS)"; export ADA_CFLAGS; \
 	CFLAGS="$(CFLAGS)"; export CFLAGS; \
 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
 	CXX="$(CXX)"; export CXX; \
@@ -514,6 +515,7 @@ BASE_FLAGS_TO_PASS = \
 	"SHELL=$(SHELL)" \
 	"YACC=$(YACC)" \
 	"`echo 'ADAFLAGS=$(ADAFLAGS)' | sed -e s'/[^=][^=]*=$$/XFOO=/'`" \
+	"ADA_CFLAGS=$(ADA_CFLAGS)" \
 	"AR_FLAGS=$(AR_FLAGS)" \
 	"`echo 'BOOT_ADAFLAGS=$(BOOT_ADAFLAGS)' | sed -e s'/[^=][^=]*=$$/XFOO=/'`" \
 	"BOOT_CFLAGS=$(BOOT_CFLAGS)" \

Makefile.tpl

@@ -167,6 +167,7 @@ HOST_SUBDIR = @host_subdir@
 HOST_EXPORTS = \
 	$(BASE_EXPORTS) \
 	CC="$(CC)"; export CC; \
+	ADA_CFLAGS="$(ADA_CFLAGS)"; export ADA_CFLAGS; \
 	CFLAGS="$(CFLAGS)"; export CFLAGS; \
 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
 	CXX="$(CXX)"; export CXX; \

config/ChangeLog

@@ -1,3 +1,8 @@
+2008-07-30  Paolo Bonzini  <bonzini@gnu.org>
+
+	* mh-pa: New, from gcc/config/pa/x-ada.
+	* mh-pa-hpux10: New, from gcc/config/pa/x-ada-hpux10.
+
 2008-07-11  Joseph Myers  <joseph@codesourcery.com>
 
 	* mh-mingw (LDFLAGS): Append to rather than replacing previous

gcc/config/pa/x-ada → config/mh-pa

@@ -1,4 +1,4 @@
 # The ada virtual array implementation requires that indexing be disabled on
 # hosts such as hpux that use a segmented memory architecture.  Both the c
 # and ada files need to be compiled with this option for correct operation.
-X_ADA_CFLAGS=-mdisable-indexing
+ADA_CFLAGS = -mdisable-indexing

gcc/config/pa/x-ada-hpux10 → config/mh-pa-hpux10

@@ -1,4 +1,4 @@
 # The ada virtual array implementation requires that indexing be disabled on
 # hosts such as hpux that use a segmented memory architecture.  Both the c
 # and ada files need to be compiled with this option for correct operation.
-X_ADA_CFLAGS = -mdisable-indexing -D_X_HPUX10
+ADA_CFLAGS = -mdisable-indexing -D_X_HPUX10

configure.ac

@@ -1067,10 +1067,18 @@ case "${host}" in
     # without overflowing the jump tables (-J says to use a 32 bit table)
     tentative_cc="cc -J"
     ;;
-  *-hp-hpux*)
+  hppa*-hp-hpux10*)
     tentative_cc="cc -Wp,-H256000"
+    host_makefile_frag="config/mh-pa-hpux10"
     ;;
-  *-*-hiux*)
+  hppa*-hp-hpux* | hppa*-*-hiux*)
+    tentative_cc="cc -Wp,-H256000"
+    host_makefile_frag="config/mh-pa"
+    ;;
+  hppa*-*)	
+    host_makefile_frag="config/mh-pa"
+    ;;
+  *-hp-hpux* | *-*-hiux*)
     tentative_cc="cc -Wp,-H256000"
     ;;
   rs6000-*-lynxos*)

gcc/ChangeLog

@@ -1,3 +1,14 @@
+2008-07-30  Paolo Bonzini  <bonzini@gnu.org>
+
+	* configure.ac: Substitute ADA_CFLAGS.
+	* configure: Regenerate.
+	* config.host: Remove mention of pa/x-ada and pa/x-ada-hpux10 files.
+	* Makefile.in: Remove mention of X_* variables.
+	* config/pa/x-ada-hpux10: Remove.
+	* config/pa/x-ada: Remove.
+
+	* doc/fragments.texi: Update.
+
 2008-07-30  Olivier Hainque  <hainque@adacore.com>
 
 	* config/mips/irix-crti.asm: .hide __gcc_init and __gcc_fini.

gcc/Makefile.in

@@ -113,15 +113,6 @@ VPATH = @srcdir@
 vpath %.texi $(gcc_docdir)
 vpath %.texi $(gcc_docdir)/include
 
-# ----
-# Default values for variables overridden in Makefile fragments.
-# These need to be quite early in the Makefile so as to avoid
-# trouble induced by changes in fragment ordering.
-# ----
-
-# For ada/Make-lang.in; overridden in, for example, config/pa/x-ada.
-X_ADA_CFLAGS =
-
 # --------
 # UNSORTED
 # --------
@@ -136,9 +127,11 @@ SUBDIRS =@subdirs@ build
 CONFIG_LANGUAGES = @all_selected_languages@
 LANGUAGES = c gcov$(exeext) gcov-dump$(exeext) $(CONFIG_LANGUAGES)
 
-# Various ways of specifying flags for compilations:
+# Default values for variables overridden in Makefile fragments.
 # CFLAGS is for the user to override to, e.g., do a cross build with -O2.
 # TCFLAGS is used for compilations with the GCC just built.
+# T_CFLAGS is used for all compilations and is overridden by t-* files.
+T_CFLAGS =
 TCFLAGS =
 CFLAGS = @CFLAGS@
 LDFLAGS = @LDFLAGS@
@@ -198,9 +191,6 @@ WARN_CFLAGS = @warn_cflags@
 
 CPPFLAGS = @CPPFLAGS@
 
-# These exists to be overridden by the x-* and t-* files, respectively.
-T_CFLAGS =
-
 AWK = @AWK@
 CC = @CC@
 BISON = @BISON@

gcc/ada/ChangeLog

@@ -1,3 +1,18 @@
+2008-07-30  Paolo Bonzini  <bonzini@gnu.org>
+
+	* gcc-interface/Make-lang.in (ALL_ADAFLAGS): Remove X_ADAFLAGS and
+	T_ADAFLAGS, replace ALL_ADA_CFLAGS with ADA_CFLAGS.
+	(ALL_ADA_CFLAGS): Remove, replace throughout with ADA_CFLAGS.
+	* gcc-interface/Makefile.in (XCFLAGS, X_CFLAGS, X_CPPFLAGS, T_CPPFLAGS,
+	X_ADA_CFLAGS, T_ADA_CFLAGS, X_ADAFLAGS, T_ADAFLAGS, ADA_CFLAGS,
+	ALL_ADA_CFLAGS): Remove.
+	(ALL_ADAFLAGS, MOST_ADAFLAGS): Remove X_ADAFLAGS and T_ADAFLAGS,
+	replace ALL_ADA_CFLAGS with ADA_CFLAGS.
+	(GCC_CFLAGS): Remove X_CFLAGS.
+	(LOOSE_CFLAGS): Remove X_CFLAGS and XCFLAGS.
+	(ALL_CPPFLAGS): Remove X_CPPFLAGS and T_CPPFLAGS.
+	(ADA_CFLAGS): Substitute.
+
 2008-07-30  Laurent Guerby  <laurent@guerby.net>
 
         PR ada/5911

gcc/ada/gcc-interface/Make-lang.in

@@ -55,11 +55,9 @@ else
 ADAFLAGS= $(COMMON_ADAFLAGS)
 endif
 
-ALL_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
-	$(ADAFLAGS)
+ALL_ADAFLAGS = $(CFLAGS) $(ADA_CFLAGS) $(ADAFLAGS)
 FORCE_DEBUG_ADAFLAGS = -g
 ADA_CFLAGS =
-ALL_ADA_CFLAGS = $(X_ADA_CFLAGS) $(T_ADA_CFLAGS) $(ADA_CFLAGS)
 ADA_INCLUDES = -nostdinc -I- -I. -Iada -I$(srcdir)/ada -I$(srcdir)/ada/gcc-interface
 ADA_INCLUDE_DIR = $(libsubdir)/adainclude
 ADA_RTL_OBJ_DIR = $(libsubdir)/adalib
@@ -76,9 +74,9 @@ ADA_FLAGS_TO_PASS = \
 # Say how to compile Ada programs.
 .SUFFIXES: .ada .adb .ads
 
-# FIXME: need to add $(ALL_ADA_CFLAGS) to .c.o suffix rule
+# FIXME: need to add $(ADA_CFLAGS) to .c.o suffix rule
 # Use loose warnings for this front end, but add some special flags
-ada-warn = $(ALL_ADA_CFLAGS) $(WERROR)
+ada-warn = $(ADA_CFLAGS) $(WERROR)
 # unresolved warnings in a couple of files
 ada/tracebak.o-warn = -Wno-error
 ada/b_gnat1.o-warn = -Wno-error
@@ -1058,25 +1056,25 @@ ada/targext.o : ada/targext.c $(SYSTEM_H) coretypes.h $(TM_H)
 		$< $(OUTPUT_OPTION)
 
 ada/cio.o     : ada/cio.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h
-	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
 	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 ada/init.o    : ada/init.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h ada/raise.h
-	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
 	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 ada/initialize.o : ada/initialize.c
-	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
 	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 ada/raise.o   : ada/raise.c $(CONFIG_H) $(SYSTEM_H) ada/adaint.h ada/raise.h
-	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) \
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
 		 $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 # Need to keep the frame pointer in this file to pop the stack properly on
 # some targets.
 ada/tracebak.o  : ada/tracebak.c $(CONFIG_H) $(SYSTEM_H)
-	$(CC) -c $(ALL_CFLAGS) $(ALL_ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
 	      -fno-omit-frame-pointer $< $(OUTPUT_OPTION)
 
 ada/cuintp.o : ada/gcc-interface/cuintp.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) \

gcc/ada/gcc-interface/Makefile.in

@@ -66,23 +66,11 @@
 # CFLAGS is for the user to override to, e.g., do a bootstrap with -O2.
 # BOOT_CFLAGS is the value of CFLAGS to pass
 # to the stage2 and stage3 compilations
-# XCFLAGS is used for most compilations but not when using the GCC just built.
-XCFLAGS =
 CFLAGS = -g
 BOOT_CFLAGS = -O $(CFLAGS)
-# These exists to be overridden by the x-* and t-* files, respectively.
-X_CFLAGS =
+# These exists to be overridden by the t-* files, respectively.
 T_CFLAGS =
 
-X_CPPFLAGS =
-T_CPPFLAGS =
-
-X_ADA_CFLAGS =
-T_ADA_CFLAGS =
-
-X_ADAFLAGS =
-T_ADAFLAGS =
-
 CC = cc
 BISON = bison
 BISONFLAGS =
@@ -119,11 +107,8 @@ GNATLIBFLAGS = -gnatpg -nostdinc
 GNATLIBCFLAGS = -g -O2
 GNATLIBCFLAGS_FOR_C = $(GNATLIBCFLAGS) $(TARGET_LIBGCC2_CFLAGS) -fexceptions \
 	-DIN_RTS
-ALL_ADA_CFLAGS = $(X_ADA_CFLAGS) $(T_ADA_CFLAGS) $(ADA_CFLAGS)
-ALL_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
-	$(ADAFLAGS)
-MOST_ADAFLAGS = $(CFLAGS) $(ALL_ADA_CFLAGS) $(X_ADAFLAGS) $(T_ADAFLAGS) \
-	$(SOME_ADAFLAGS)
+ALL_ADAFLAGS = $(CFLAGS) $(ADA_CFLAGS) $(ADAFLAGS)
+MOST_ADAFLAGS = $(CFLAGS) $(ADA_CFLAGS) $(SOME_ADAFLAGS)
 THREAD_KIND = native
 THREADSLIB =
 GMEM_LIB =
@@ -144,9 +129,9 @@ hyphen = -
 P =
 
 # This is used instead of ALL_CFLAGS when compiling with GCC_FOR_TARGET.
-# It omits XCFLAGS, and specifies -B./.
+# It specifies -B./.
 # It also specifies -B$(tooldir)/ to find as and ld for a cross compiler.
-GCC_CFLAGS = $(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(CFLAGS)
+GCC_CFLAGS = $(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS)
 
 # Tools to use when building a cross-compiler.
 # These are used because `configure' appends `cross-make'
@@ -231,11 +216,10 @@ INTERNAL_CFLAGS = @CROSS@ -DIN_GCC
 
 # This is the variable actually used when we compile.
 LOOSE_CFLAGS = `echo $(CFLAGS) $(WARN2_CFLAGS)|sed -e 's/-pedantic//g' -e 's/-Wtraditional//g'`
-ALL_CFLAGS = $(INTERNAL_CFLAGS) $(X_CFLAGS) $(T_CFLAGS) $(LOOSE_CFLAGS) \
-	$(XCFLAGS)
+ALL_CFLAGS = $(INTERNAL_CFLAGS) $(T_CFLAGS) $(LOOSE_CFLAGS)
 
 # Likewise.
-ALL_CPPFLAGS = $(CPPFLAGS) $(X_CPPFLAGS) $(T_CPPFLAGS)
+ALL_CPPFLAGS = $(CPPFLAGS)
 
 # This is where we get libiberty.a from.
 LIBIBERTY = ../../libiberty/libiberty.a
@@ -2260,15 +2244,15 @@ gen-soccon: gen-soccon.c gsocket.h
 
 cio.o     : cio.c
 	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+		 $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 init.o    : init.c adaint.h raise.h
 	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+		 $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 initialize.o : initialize.c raise.h
 	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+		 $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 targext.o : targext.c
 	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) \
@@ -2279,7 +2263,7 @@ targext.o : targext.c
 # the SEH handling on Windows. The reasons are not clear.
 seh_init.o : seh_init.c raise.h
 	$(CC) -c $(ALL_CFLAGS) $(ADA_CFLAGS) -O0 \
-	         $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
+		 $(ALL_CPPFLAGS) $(INCLUDES) $< $(OUTPUT_OPTION)
 
 # Need to keep the frame pointer in this file to pop the stack properly on
 # some targets.

gcc/config.host

@@ -141,26 +141,14 @@ case ${host} in
     prefix=/gnu
     local_prefix=/gnu
     ;;
-  hppa1.1-*-pro*)
-    host_xmake_file="${host_xmake_file} pa/x-ada"
-    ;;
-  hppa1.1-*-osf*)
-    host_xmake_file="${host_xmake_file} pa/x-ada"
-    ;;
-  hppa1.1-*-rtems*)
-    host_xmake_file="${host_xmake_file} pa/x-ada"
-    ;;
-  hppa1.1-*-bsd*)
-    host_xmake_file="${host_xmake_file} pa/x-ada"
-    ;;
   hppa1.0-*-hpux10* | hppa1.1-*-hpux10* | hppa2*-*-hpux10*)
     out_host_hook_obj=host-hpux.o
-    host_xmake_file="${host_xmake_file} pa/x-ada-hpux10 x-hpux"
+    host_xmake_file="${host_xmake_file} x-hpux"
     ;;
   hppa1.0-*-hpux11* | hppa1.1-*-hpux11* | hppa2*-*-hpux11* | \
   hppa*64*-*-hpux11*)
     out_host_hook_obj=host-hpux.o
-    host_xmake_file="${host_xmake_file} pa/x-ada x-hpux"
+    host_xmake_file="${host_xmake_file} x-hpux"
     ;;
   hppa*-*-linux*)
     out_host_hook_obj=host-hpux.o

gcc/doc/fragments.texi

@@ -172,43 +172,17 @@ some other filename (say @file{specs.install}), that will then be
 created out of the built-in specs, and introduce a @file{Makefile}
 rule to generate the @file{specs} file that's going to be used at
 build time out of your @file{specs.install}.
+
+@item T_CFLAGS
+These are extra flags to pass to the C compiler.  They are used both
+when building GCC, and when compiling things with the just-built GCC@.
+This variable is deprecated and should not be used.
 @end table
 
 @node Host Fragment
 @section Host Makefile Fragments
 @cindex host makefile fragment
 @cindex @file{x-@var{host}}
 
-The use of @file{x-@var{host}} fragments is discouraged.  You should do
-so only if there is no other mechanism to get the behavior desired.
-Host fragments should never forcibly override variables set by the
-configure script, as they may have been adjusted by the user.
-
-Variables provided for host fragments to set include:
-
-@table @code
-
-@item X_CFLAGS
-@itemx X_CPPFLAGS
-These are extra flags to pass to the C compiler and preprocessor,
-respectively.  They are used both when building GCC, and when compiling
-things with the just-built GCC@.
-
-@item XCFLAGS
-These are extra flags to use when building the compiler.  They are not
-used when compiling @file{libgcc.a}.  However, they @emph{are} used when
-recompiling the compiler with itself in later stages of a bootstrap.
-
-@item BOOT_LDFLAGS
-Flags to be passed to the linker when recompiling the compiler with
-itself in later stages of a bootstrap.  You might need to use this if,
-for instance, one of the front ends needs more text space than the
-linker provides by default.
-
-@item EXTRA_PROGRAMS
-A list of additional programs required to use the compiler on this host,
-which should be compiled with GCC and installed alongside the front
-ends.  If you set this variable, you must also provide rules to build
-the extra programs.
-
-@end table
+The use of @file{x-@var{host}} fragments is discouraged.  You should only
+use it for makefile dependencies.