[PATCH v2 1/3] package_deb.bbclass, cross-canadian.bbclass: DPKG_ARCH mapping function

[Matt Madison <matt@madison.systems>]

Have DPKG_ARCH set by directly invoking a mapping function, rather
than using an anonymous Python function modify the variable under
the hood, so we can have proper handling of overrides.

Also bring in some additional mappings to Debian architecture names
that weren't being handled.

Signed-off-by: Matt Madison <matt@madison.systems>
---
 meta/classes/cross-canadian.bbclass |  2 +-
 meta/classes/package_deb.bbclass    | 35 +++++++++++++++++++++++++----------
 2 files changed, 26 insertions(+), 11 deletions(-)

diff --git a/meta/classes/cross-canadian.bbclass b/meta/classes/cross-canadian.bbclass
index 7b26ed6..e07b1bd 100644
--- a/meta/classes/cross-canadian.bbclass
+++ b/meta/classes/cross-canadian.bbclass
@@ -103,7 +103,7 @@ HOST_LD_ARCH = "${SDK_LD_ARCH}"
 HOST_AS_ARCH = "${SDK_AS_ARCH}"
 
 #assign DPKG_ARCH
-DPKG_ARCH = "${SDK_ARCH}"
+DPKG_ARCH = "${@debian_arch_map(d.getVar('SDK_ARCH', True), '')}"
 
 CPPFLAGS = "${BUILDSDK_CPPFLAGS}"
 CFLAGS = "${BUILDSDK_CFLAGS}"
diff --git a/meta/classes/package_deb.bbclass b/meta/classes/package_deb.bbclass
index 5feeeb0..8d27adf 100644
--- a/meta/classes/package_deb.bbclass
+++ b/meta/classes/package_deb.bbclass
@@ -6,7 +6,7 @@ inherit package
 
 IMAGE_PKGTYPE ?= "deb"
 
-DPKG_ARCH ?= "${TARGET_ARCH}" 
+DPKG_ARCH ?= "${@debian_arch_map(d.getVar('TARGET_ARCH', True), d.getVar('TUNE_FEATURES', True))}"
 
 PKGWRITEDIRDEB = "${WORKDIR}/deploy-debs"
 
@@ -14,6 +14,28 @@ APTCONF_TARGET = "${WORKDIR}"
 
 APT_ARGS = "${@['', '--no-install-recommends'][d.getVar("NO_RECOMMENDATIONS", True) == "1"]}"
 
+def debian_arch_map(arch, tune):
+    tune_features = tune.split()
+    if arch in ["i586", "i686"]:
+        return "i386"
+    if arch == "x86_64":
+        if "mx32" in tune_features:
+            return "x32"
+        return "amd64"
+    if arch.startswith("mips"):
+        endian = ["el", ""]["bigendian" in tune_features]
+        if "n64" in tune_features:
+            return "mips64" + endian
+        if "n32" in tune_features:
+            return "mipsn32" + endian
+        return "mips" + endian
+    if arch == "powerpc":
+        return arch + ["", "spe"]["spe" in tune_features]
+    if arch == "aarch64":
+        return "arm64"
+    if arch == "arm":
+        return arch + ["el", "hf"]["callconvention-hard" in tune_features]
+    return arch
 #
 # install a bunch of packages using apt
 # the following shell variables needs to be set before calling this func:
@@ -288,6 +310,8 @@ python do_package_deb () {
         cleanupcontrol(root)
         bb.utils.unlockfile(lf)
 }
+# Indirect references to these vars
+do_package_write_deb[vardeps] += "PKGV PKGR PKGV DESCRIPTION SECTION PRIORITY MAINTAINER DPKG_ARCH PN HOMEPAGE"
 # Otherwise allarch packages may change depending on override configuration
 do_package_deb[vardepsexclude] = "OVERRIDES"
 
@@ -311,15 +335,6 @@ python () {
         deps = ' dpkg-native:do_populate_sysroot virtual/fakeroot-native:do_populate_sysroot'
         d.appendVarFlag('do_package_write_deb', 'depends', deps)
         d.setVarFlag('do_package_write_deb', 'fakeroot', "1")
-
-    # Map TARGET_ARCH to Debian's ideas about architectures
-    darch = d.getVar('DPKG_ARCH', True)
-    if darch in ["x86", "i486", "i586", "i686", "pentium"]:
-         d.setVar('DPKG_ARCH', 'i386')
-    elif darch == "x86_64":
-         d.setVar('DPKG_ARCH', 'amd64')
-    elif darch == "arm":
-         d.setVar('DPKG_ARCH', 'armel')
 }
 
 python do_package_write_deb () {
-- 
2.5.0