Config.in: mark BR2_CONFIG_CACHE as experimental and disable by default

As it is known to break with certain package combinations.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

CHANGES

@@ -8,6 +8,10 @@
 	Mark CRIS architecture as deprecated, as it is discontinued
 	upstream.
 
+	Marked shared config.cache as experimental and disabled by
+	default as it is known to break with certain package
+	combinations.
+
 	Toolchain: fixed gcc 4.2.x build after uClibc NPTL support got
 	added.
 

Config.in

@@ -267,9 +267,11 @@ config BR2_HAVE_DEVFILES
 menu "Advanced"
 
 config BR2_CONFIG_CACHE
-	bool "Use a central configure cache file"
-	default y
+	bool "Use a central configure cache file (EXPERIMENTAL)"
 	help
+	  Notice: This is experimental and known to break with certain
+	  package combinations.
+
 	  This determines if a central config cache is used by
 	  packages, reducing the configure time for packages as each
 	  one caches its findings.

configs/arm_nptl_toolchain_defconfig

@@ -155,7 +155,7 @@ BR2_OPTIMIZE_2=y
 #
 # Advanced
 #
-BR2_CONFIG_CACHE=y
+# BR2_CONFIG_CACHE is not set
 
 #
 # Toolchain

configs/arm_toolchain_defconfig

@@ -161,7 +161,7 @@ BR2_TOPDIR_SUFFIX=""
 BR2_ROOTFS_PREFIX="rootfs"
 BR2_JLEVEL=2
 # BR2_DEPRECATED is not set
-BR2_CONFIG_CACHE=y
+# BR2_CONFIG_CACHE is not set
 # BR2_ENABLE_DEBUG is not set
 BR2_STRIP_strip=y
 # BR2_STRIP_sstrip is not set

configs/at91sam9261ek_defconfig

@@ -182,7 +182,7 @@ BR2_TOPDIR_SUFFIX=""
 BR2_ROOTFS_PREFIX="at91sam9261ek-NAND"
 BR2_JLEVEL=2
 # BR2_DEPRECATED is not set
-BR2_CONFIG_CACHE=y
+# BR2_CONFIG_CACHE is not set
 # BR2_ENABLE_DEBUG is not set
 BR2_STRIP_strip=y
 # BR2_STRIP_sstrip is not set

configs/at91sam9261ek_ext_defconfig

@@ -183,7 +183,7 @@ BR2_TOPDIR_SUFFIX=""
 BR2_ROOTFS_PREFIX="at91sam9261ek-NAND"
 BR2_JLEVEL=2
 # BR2_DEPRECATED is not set
-BR2_CONFIG_CACHE=y
+# BR2_CONFIG_CACHE is not set
 # BR2_ENABLE_DEBUG is not set
 BR2_STRIP_strip=y
 # BR2_STRIP_sstrip is not set

configs/at91sam9263ek_defconfig

@@ -180,7 +180,7 @@ BR2_TOPDIR_SUFFIX=""
 BR2_ROOTFS_PREFIX="at91sam9263ek-NAND"
 BR2_JLEVEL=2
 # BR2_DEPRECATED is not set
-BR2_CONFIG_CACHE=y
+# BR2_CONFIG_CACHE is not set
 # BR2_ENABLE_DEBUG is not set
 BR2_STRIP_strip=y
 # BR2_STRIP_sstrip is not set

configs/at91sam9263ek_ext_defconfig

@@ -182,7 +182,7 @@ BR2_TOPDIR_SUFFIX=""
 BR2_ROOTFS_PREFIX="at91sam9263ek-NAND"
 BR2_JLEVEL=2
 # BR2_DEPRECATED is not set
-BR2_CONFIG_CACHE=y
+# BR2_CONFIG_CACHE is not set
 # BR2_ENABLE_DEBUG is not set
 BR2_STRIP_strip=y
 # BR2_STRIP_sstrip is not set

configs/atngw100_defconfig

@@ -109,7 +109,7 @@ BR2_OPTIMIZE_S=y
 #
 # Advanced
 #
-BR2_CONFIG_CACHE=y
+# BR2_CONFIG_CACHE is not set
 
 #
 # Toolchain