package/dtc: new package

dtc is the Device Tree Compiler, and manipulates device trees.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/Config.in

@@ -459,6 +459,7 @@ endmenu
 
 menu "Hardware handling"
 source "package/ccid/Config.in"
+source "package/dtc/Config.in"
 source "package/imx-lib/Config.in"
 source "package/lcdapi/Config.in"
 source "package/libaio/Config.in"

package/dtc/Config.in

@@ -0,0 +1,9 @@
+config BR2_PACKAGE_DTC
+	bool "dtc"
+	help
+	  The Device Tree Compiler, dtc, takes as input a device-tree in
+	  a given format and outputs a device-tree in another format.
+
+	  Note that only the library is installed for now.
+
+	  http://git.jdl.com/gitweb/?p=dtc.git  (no home page)

package/dtc/dtc-extra_cflags.patch

@@ -0,0 +1,28 @@
+Makefile: append the CFLAGS to existing ones
+
+Allow the user to pass custom CFLAGS (eg. optimisation flags).
+
+Do not use EXTRA_CFLAGS, append to existing CFLAGS with +=  (Arnout)
+
+Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
+Cc: Arnout Vandecappelle <arnout@mind.be>
+
+---
+Patch not sent upstream.
+
+Although not specific to buildroot, I am not sure this is the best
+way to handle user-supplied CFLAGS.
+
+diff -durN dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef.orig/Makefile dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef/Makefile
+--- dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef.orig/Makefile	2012-10-22 22:02:47.541240846 +0200
++++ dtc-e4b497f367a3b2ae99cc52089a14a221b13a76ef/Makefile	2012-10-22 22:03:21.151047833 +0200
+@@ -18,7 +18,8 @@
+ CPPFLAGS = -I libfdt -I .
+ WARNINGS = -Werror -Wall -Wpointer-arith -Wcast-qual -Wnested-externs \
+ 	-Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls
+-CFLAGS = -g -Os -fPIC -Werror $(WARNINGS)
++CFLAGS ?= -g -Os
++CFLAGS += -fPIC $(WARNINGS)
+ 
+ BISON = bison
+ LEX = flex

package/dtc/dtc-separate-lib-install.patch

@@ -0,0 +1,28 @@
+Makefile: add a rule to only install libfdt
+
+Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
+
+---
+Patch not sent upstream.
+
+It's really specific to buildroot, and is probably not
+good (aka generic) enough to be pushed upstream.
+
+diff --git a/Makefile b/Makefile
+index 1169e6c..39e7190 100644
+--- a/Makefile
++++ b/Makefile
+@@ -160,10 +160,12 @@ endif
+ # intermediate target and building them again "for real"
+ .SECONDARY: $(DTC_GEN_SRCS) $(CONVERT_GEN_SRCS)
+ 
+-install: all $(SCRIPTS)
++install: all $(SCRIPTS) libfdt_install
+ 	@$(VECHO) INSTALL
+ 	$(INSTALL) -d $(DESTDIR)$(BINDIR)
+ 	$(INSTALL) $(BIN) $(SCRIPTS) $(DESTDIR)$(BINDIR)
++
++libfdt_install: libfdt
+ 	$(INSTALL) -d $(DESTDIR)$(LIBDIR)
+ 	$(INSTALL) $(LIBFDT_lib) $(DESTDIR)$(LIBDIR)
+ 	ln -sf $(notdir $(LIBFDT_lib)) $(DESTDIR)$(LIBDIR)/$(LIBFDT_soname)

package/dtc/dtc.mk

@@ -0,0 +1,33 @@
+#############################################################
+#
+# dtc
+#
+#############################################################
+
+DTC_VERSION         = e4b497f367a3b2ae99cc52089a14a221b13a76ef
+DTC_SITE            = git://git.jdl.com/software/dtc.git
+DTC_LICENSE         = GPLv2+/BSD-2c
+DTC_LICENSE_FILES   = README.license GPL
+# Note: the dual-license only applies to the library.
+#       The DT compiler (dtc) is GPLv2+, but we do not install it.
+DTC_INSTALL_STAGING = YES
+
+define DTC_BUILD_CMDS
+	$(TARGET_CONFIGURE_OPTS)    \
+	$(MAKE) -C $(@D) PREFIX=/usr libfdt
+endef
+
+# libfdt_install is our own install rule added by our patch
+define DTC_INSTALL_STAGING_CMDS
+	$(MAKE) -C $(@D) DESTDIR=$(STAGING_DIR) PREFIX=/usr libfdt_install
+endef
+
+define DTC_INSTALL_TARGET_CMDS
+	$(MAKE) -C $(@D) DESTDIR=$(TARGET_DIR) PREFIX=/usr libfdt_install
+endef
+
+define DTC_CLEAN_CMDS
+	$(MAKE) -C $(@D) libfdt_clean
+endef
+
+$(eval $(generic-package))