base.bbclass: extend PACKAGECONFIG for conflict package configs

There are mutually exclusive PACKAGECONFIGs in recipes. Though it
declares that package configs are exclusive, it can't prevent users to
set them at same time. Extend PACKAGECONFIG to support specifying
conflicted package configs.

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 7bfb1d1912eccbac470e260a8a84491f3f4cd0d9..45f9435fd8ed718207b890ad4e6b394d3cb8323f 100644 (file)
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -393,7 +393,7 @@ python () {
     # These take the form:
     #
     # PACKAGECONFIG ??= "<default options>"
-    # PACKAGECONFIG[foo] = "--enable-foo,--disable-foo,foo_depends,foo_runtime_depends,foo_runtime_recommends"
+    # PACKAGECONFIG[foo] = "--enable-foo,--disable-foo,foo_depends,foo_runtime_depends,foo_runtime_recommends,foo_conflict_packageconfig"
     pkgconfigflags = d.getVarFlags("PACKAGECONFIG") or {}
     if pkgconfigflags:
         pkgconfig = (d.getVar('PACKAGECONFIG') or "").split()
@@ -440,8 +440,8 @@ python () {
         for flag, flagval in sorted(pkgconfigflags.items()):
             items = flagval.split(",")
             num = len(items)
-            if num > 5:
-                bb.error("%s: PACKAGECONFIG[%s] Only enable,disable,depend,rdepend,rrecommend can be specified!"
+            if num > 6:
+                bb.error("%s: PACKAGECONFIG[%s] Only enable,disable,depend,rdepend,rrecommend,conflict_packageconfig can be specified!"
                     % (d.getVar('PN'), flag))
 
             if flag in pkgconfig:
@@ -455,6 +455,20 @@ python () {
                     extraconf.append(items[0])
             elif num >= 2 and items[1]:
                     extraconf.append(items[1])
+
+            if num >= 6 and items[5]:
+                conflicts = set(items[5].split())
+                invalid = conflicts.difference(set(pkgconfigflags.keys()))
+                if invalid:
+                    bb.error("%s: PACKAGECONFIG[%s] Invalid conflict package config%s '%s' specified."
+                        % (d.getVar('PN'), flag, 's' if len(invalid) > 1 else '', ' '.join(invalid)))
+
+                if flag in pkgconfig:
+                    intersec = conflicts.intersection(set(pkgconfig))
+                    if intersec:
+                        bb.fatal("%s: PACKAGECONFIG[%s] Conflict package config%s '%s' set in PACKAGECONFIG."
+                            % (d.getVar('PN'), flag, 's' if len(intersec) > 1 else '', ' '.join(intersec)))
+
         appendVar('DEPENDS', extradeps)
         appendVar('RDEPENDS_${PN}', extrardeps)
         appendVar('RRECOMMENDS_${PN}', extrarrecs)