distro: Add new feature to indicate thumb-interworking.

* This would be used to decide if we can use BX in return
  instructions in uclibc.

Signed-off-by: Khem Raj <raj.khem@gmail.com>

5 files changed, 17 insertions, 0 deletions

diff --git a/conf/distro/include/angstrom.inc b/conf/distro/include/angstrom.inc
index f13cc2223d..3ba94fa02a 100644
--- a/conf/distro/include/angstrom.inc
+++ b/conf/distro/include/angstrom.inc
@@ -204,3 +204,6 @@ DISTRO_FEATURES = "largefile ipv4 ipv6 nfs smbfs wifi ppp alsa bluetooth ext2 vf
 
 # Use-like features
 DISTRO_FEATURES += "tk"
+
+# Add thumb-interwork to feature list if selected machine supports it.
+DISTRO_FEATURES += ' ${@["", "thumb-interwork"][bb.data.getVar('THUMB_INTERWORK', d, 1) == "yes"]}'
diff --git a/conf/distro/include/kaeilos.inc b/conf/distro/include/kaeilos.inc
index bdc4aadc87..edbad69990 100644
--- a/conf/distro/include/kaeilos.inc
+++ b/conf/distro/include/kaeilos.inc
@@ -214,3 +214,6 @@ DISTRO_FEATURES = "nfs smbfs wifi ppp alsa bluetooth ext2 vfat irda pcmcia usbga
 
 # Use-like features
 DISTRO_FEATURES += "tk"
+
+# Add thumb-interwork to feature list if selected machine supports it.
+DISTRO_FEATURES += ' ${@["", "thumb-interwork"][bb.data.getVar('THUMB_INTERWORK', d, 1) == "yes"]}'
diff --git a/conf/distro/include/slugos.inc b/conf/distro/include/slugos.inc
index 807d45de61..8d53ffc0ec 100644
--- a/conf/distro/include/slugos.inc
+++ b/conf/distro/include/slugos.inc
@@ -23,9 +23,18 @@ DISTRO_VERSION ?= "${SLUGOS_VERSION}${DISTRO_REVISION}-${DISTRO_TYPE}"
 # DISTRO_FEED ?= "${SLUGOS_VERSION}-${DISTRO_TYPE}"
 DISTRO_FEED ?= "unstable"
 
+THUMB_INTERWORK = "yes"
+# "yes" "no"
+#    Whether to compile with code to allow interworking between the two
+#    instruction sets.  This allows thumb code to be executed on a primarily
+#    arm system and vice versa.  It is strongly recommended that DISTROs not
+#    turn this off - the actual cost is very small.
 # We want images supporting the following features (for task-base)
 DISTRO_FEATURES = "nfs smbfs wifi ppp alsa bluetooth ext2 vfat irda pcmcia usbgadget usbhost pci"
 
+# Add thumb-interwork to feature list if selected machine supports it.
+DISTRO_FEATURES += ' ${@["", "thumb-interwork"][bb.data.getVar('THUMB_INTERWORK', d, 1) == "yes"]}'
+
 IMAGE_BASENAME = "${@['slugos${SITEINFO_ENDIANESS}', 'ucslugc'][bb.data.getVar('TARGET_OS', d, 1) == 'linux-uclibc']}"
 
 # The following need not be set, the defaults should be adequate
diff --git a/conf/distro/minimal-uclibc.conf b/conf/distro/minimal-uclibc.conf
index 44805cf9c3..287d6de2b4 100644
--- a/conf/distro/minimal-uclibc.conf
+++ b/conf/distro/minimal-uclibc.conf
@@ -44,3 +44,4 @@ DISTRO_FEATURES += "pam"
 DISTRO_FEATURES += "largefile"
 # glib-2.0 nneds ipv6 and there is no knob to control it
 DISTRO_FEATURES += "ipv4 ipv6"
+DISTRO_FEATURES += ' ${@["", "thumb-interwork"][bb.data.getVar('THUMB_INTERWORK', d, 1) == "yes"]}'
diff --git a/conf/distro/minimal.conf b/conf/distro/minimal.conf
index 9a081309e1..5fbbc33585 100644
--- a/conf/distro/minimal.conf
+++ b/conf/distro/minimal.conf
@@ -33,6 +33,7 @@ DISTRO_FEATURES += "eabi"
 # or higher
 
 DISTRO_FEATURES += "mplt"
+DISTRO_FEATURES += ' ${@["", "thumb-interwork"][bb.data.getVar('THUMB_INTERWORK', d, 1) == "yes"]}'
 
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 # LIBRARY NAMES