[RFC PATCH 3/5] Trigger Module.ksymb generation in Makefile

[Cristina Moraru <cristina.moraru09@gmail.com>]

Trigger the generation of file scripts/Module.ksymb in
Makefile by calling updated scripts/streamline_config.pl
with corresponding parameter (--genmodulesymb). The file
is generated at each compilation considering that
associations may change after tree updates.

This patch is part of a research project within
Google Summer of Code of porting 'make localmodconfig'
for backported drivers. The goal is to enable each
module to expose in /sys its corresponding CONFIG_* option.
The value of this attribute will be dynamically pegged by
modpost without requiring extra work from the driver developers.
Further, this information will be used by a hardware interogation
tool to extract build information about the existing devices.

Signed-off-by: Cristina Moraru <cristina.moraru09@gmail.com>
---
 Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Makefile b/Makefile
index 393b615..286b949 100644
--- a/Makefile
+++ b/Makefile
@@ -219,6 +219,10 @@ VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 
 export srctree objtree VPATH
 
+KSYMB_GENERATOR := $(objtree)/scripts/kconfig/streamline_config.pl
+ksymb_gen_command = perl $(KSYMB_GENERATOR) --genmoduleksymb $(objtree) $(Kconfig)
+ksymb_update := $(shell objtree=$(objtree) srctree=$(srctree) $(ksymb_gen_command))
+
 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 # first, and if a usermode build is happening, the "ARCH=um" on the command
 # line overrides the setting of ARCH below.  If a native build is happening,
-- 
2.7.4