bzip2: build separate devel package

app-arch/bzip2/bzip2-1.0.6.recipe

@@ -5,7 +5,7 @@ LICENSE="bzip2"
 COPYRIGHT="1996-2010 Julian R Seward"
 SRC_URI="http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz"
 CHECKSUM_MD5="00b516f4704d4a7cb50a1d97e6e8e15b"
-REVISION="2"
+REVISION="3"
 ARCHITECTURES="x86_gcc2 ?x86"
 
 PROVIDES="
@@ -27,7 +27,6 @@ REQUIRES="
 	haiku >= $haikuVersion
 	"
 BUILD_REQUIRES="
-	$REQUIRES
 	cmd:ar
 	cmd:gcc
 	cmd:ld
@@ -67,4 +66,18 @@ INSTALL()
 
 	# prepare development lib links 
 	prepareInstalledDevelLibs libbz2
+
+	# devel package
+	packageEntries devel \
+		$developDir
 }
+
+# ----- devel package -------------------------------------------------------
+
+PROVIDES_devel="
+	bzip2_devel = $portVersion compat >= 1
+	devel:libbz2 = $portVersion compat >= 1.0
+	"
+REQUIRES_devel="
+	bzip2 == $portVersion base
+	"