kbuild: remove dependency on compile.h

We had a dummy dependency on include/linux/compile.h, but it really caused
more trouble than benefits. It's not actually needed for the module
postprocessing, it was only put there to make sure we recognize when
gcc changed under us. However, we really can only do so much, and
the rest of kbuild won't notice a changed gcc either, so if the user replaces
gcc during a build, he just can't rely on the build doing the right thing.

The common cases are still covered, anyway. When the command to invoke
gcc changes ("CC=gcc32") we notice, and when the path to

	/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/stdarg.h

changes (which luckily contains the "2.96", we'll notice and handle that,
too.

diff --git a/Makefile b/Makefile
index c95de1620be2778c737eb4a239d9095427270c9b..2b326138790396cb67d764f6539606055c538e9b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -501,11 +501,8 @@ all: modules
 
 #      Build modules
 
-include/linux/compile.h: FORCE
-       $(Q)$(MAKE) $(build)=init include/linux/compile.h
-
 .PHONY: modules
-modules: $(SUBDIRS) $(if $(KBUILD_BUILTIN),vmlinux) include/linux/compile.h
+modules: $(SUBDIRS) $(if $(KBUILD_BUILTIN),vmlinux)
        @echo '  Building modules, stage 2.';
        $(Q)$(MAKE) -rR -f scripts/Makefile.modpost
 

diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index a7ab45ec783969187e33082dfb4ec7ee2d91cb5e..59b848e943e2364158030de0142ed449b1738ff1 100644 (file)
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -37,10 +37,7 @@ targets += $(modules)
 quiet_cmd_cc_o_c = CC      $@
       cmd_cc_o_c = $(CC) $(CFLAGS) $(CFLAGS_MODULE) -c -o $@ $<
 
-#      We have a fake dependency on compile.h to make sure that we
-#      notice if the compiler version changes under us.
-
-$(modules:.ko=.mod.o): %.mod.o: %.mod.c include/linux/compile.h FORCE
+$(modules:.ko=.mod.o): %.mod.o: %.mod.c
        $(call if_changed,cc_o_c)
 
 targets += $(modules:.ko=.mod.o)