From 4902ad7b078450e54c21bb5caf4505b3715acbb9 Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN\"" <yann.morin.1998@anciens.enib.fr>
Date: Mon, 23 Apr 2007 21:06:09 +0000
Subject: The linux kernel config file is now optional. If none is given, a
 default one is created using the default target for the given architecture.


diff --git a/config/kernel_linux.in b/config/kernel_linux.in
index c1699ae..4d74961 100644
--- a/config/kernel_linux.in
+++ b/config/kernel_linux.in
@@ -117,8 +117,9 @@ config KERNEL_LINUX_CONFIG_FILE
     prompt "Configuration file"
     default ""
     help
-      Path to the kernel configuration file.
+      Path to a kernel configuration file.
       
-      You _must_ provide one (for now).
+      If you don't provide one, then the default configuration for
+      your target will be used.
 
 endif
diff --git a/scripts/build/kernel_linux.sh b/scripts/build/kernel_linux.sh
index d9d4de5..f23487f 100644
--- a/scripts/build/kernel_linux.sh
+++ b/scripts/build/kernel_linux.sh
@@ -6,8 +6,21 @@
 do_kernel_check_config() {
     CT_DoStep INFO "Checking kernel configuration"
 
-    if [ "${CT_KERNEL_LINUX_HEADERS_USE_CUSTOM_DIR}" != "y" ]; then
-        CT_TestOrAbort "You did not provide a kernel config file!" -n "${CT_KERNEL_LINUX_CONFIG_FILE}" -a -f "${CT_KERNEL_LINUX_CONFIG_FILE}"
+    if [    "${CT_KERNEL_LINUX_HEADERS_USE_CUSTOM_DIR}" != "y" \
+         -a \( -z "${CT_KERNEL_LINUX_CONFIG_FILE}" -o ! -r "${CT_KERNEL_LINUX_CONFIG_FILE}" \) ]; then
+        CT_DoLog WARN "You did not provide a kernel configuration file!"
+        CT_DoLog WARN "I will try to generate one for you, but beware!"
+
+        CT_DoStep INFO "Building a default configuration file for linux kernel"
+
+        mkdir -p "${CT_BUILD_DIR}/build-kernel-defconfig"
+        cd "${CT_BUILD_DIR}/build-kernel-defconfig"
+        make -C "${CT_SRC_DIR}/${CT_KERNEL_FILE}" O=`pwd`   \
+             ARCH=${CT_KERNEL_ARCH} defconfig               2>&1 |CT_DoLog DEBUG
+
+        CT_KERNEL_LINUX_CONFIG_FILE="`pwd`/.config"
+
+        CT_EndStep
     fi
 
     CT_EndStep
-- 
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