On Thu, Jan 13, 2011 at 06:01:31PM +0100, Sam Ravnborg wrote:

On Thu, Jan 13, 2011 at 05:14:05PM +0100, Michal Marek wrote:

quoted

On 9.1.2011 20:29, Sam Ravnborg wrote:

quoted

diff --git a/scripts/asm-generic.sh b/scripts/asm-generic.sh
new file mode 100644
index 0000000..d28127f
--- /dev/null
+++ b/scripts/asm-generic.sh

@@ -0,0 +1,33 @@
+#!/bin/sh
+#
+# include/asm-generic contains a lot of files that are used
+# verbatim by several architectures.
+#
+# This scripts read the file arch/$(ARCH)/include/asm/Kbuild
+# and for each file listed in this file with generic-y create
+# a small wrapper file in arch/$(ARCH)/include/generated/
+
+# read list of header files form Kbuild
+# The file has make syntax which looks like this:
+#
+# generic-y += <filename>
+
+srcdir=${srctree}/arch/$1/include/asm
+gendir=arch/$1/include/generated/asm
+
+# Read the list of files (note that the list uses make syntax)
+files=$( cat ${srcdir}/Kbuild | \
+          grep -v ^# | grep generic-y | cut -d '=' -f 2)

Now that the list of required generic headers is in a Kbuild file, it
would be better to let make parse it, instead of enforcing one way to
construct the list (it is the preferred way, but C files that do not
conform to Documentation/CodingStyle are not rejected by the compiler
either). I will post a patch when I'm back online in the evening.

Would be great!

Guan also pointed out a less than minor issue...
I overwrite the files each time so that I force a rebuild.

Hi,

this should do the trick (the deletion of scripts/asm-generic.sh is left
out for brevity). I initially wanted to use this also from
Makefile.headersinst, but there we only want to export headers listed in
header-y, so I gave up on this idea.

Michal

diff --git a/Makefile b/Makefile
index 5a29426..6ede051 100644
--- a/Makefile
+++ b/Makefile

@@ -416,7 +416,7 @@ endif
 # Support for using generic headers in asm-generic
 PHONY += asm-generic
 asm-generic:
-	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/asm-generic.sh $(SRCARCH)
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic obj=arch/$(SRCARCH)/include/generated/asm
 
 # To make sure we do not include .config for any of the *config targets
 # catch them early, and hand them over to scripts/kconfig/Makefile

diff --git a/scripts/Makefile.asm-generic b/scripts/Makefile.asm-generic
new file mode 100644
index 0000000..b4f2547
--- /dev/null
+++ b/scripts/Makefile.asm-generic

@@ -0,0 +1,26 @@
+# include/asm-generic contains a lot of files that are used
+# verbatim by several architectures.
+#
+# This Makefile reads the file arch/$(SRCARCH)/include/asm/Kbuild
+# and for each file listed in this file with generic-y creates
+# a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/asm)
+
+kbuild-file := $(srctree)/arch/$(SRCARCH)/include/asm/Kbuild
+include $(kbuild-file)
+
+include scripts/Kbuild.include
+
+
+ifneq ($(KBUILD_SRC),)
+# Create output directory if not already present
+_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
+endif
+
+quiet_cmd_wrap = WRAP    $@
+cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@
+
+all: $(patsubst %, $(obj)/%, $(generic-y))
+
+$(obj)/%.h:
+	$(call cmd,wrap)
+