build system overhaul

git-svn-id: svn://busybox.net/trunk/busybox@16307 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 18 insertions, 0 deletions

diff --git a/scripts/basic/Makefile b/scripts/basic/Makefile
new file mode 100644
index 000000000..f22e94c3a
--- /dev/null
+++ b/scripts/basic/Makefile
@@ -0,0 +1,18 @@
+###
+# Makefile.basic list the most basic programs used during the build process.
+# The programs listed herein is what is needed to do the basic stuff,
+# such as splitting .config and fix dependency file.
+# This initial step is needed to avoid files to be recompiled
+# when kernel configuration changes (which is what happens when
+# .config is included by main Makefile.
+# ---------------------------------------------------------------------------
+# fixdep:        Used to generate dependency information during build process
+# split-include: Divide all config symbols up in a number of files in
+#                include/config/...
+# docproc:       Used in Documentation/docbook
+
+hostprogs-y     := fixdep split-include docproc
+always          := $(hostprogs-y)
+
+# fixdep is needed to compile other host programs
+$(addprefix $(obj)/,$(filter-out fixdep,$(always))): $(obj)/fixdep