packages: set more explicit ABI_VERSION values

In the case of upstream libraries, set the ABI_VERSION variable to the
soname value of the first version version after the last backwards
incompatible change.

For custom OpenWrt libraries, set the ABI_VERSION to the date of the
last Git commit doing backwards incompatible changes to the source,
such as changing function singatures or dropping exported symbols.

The soname values have been determined by either checking
https://abi-laboratory.pro/index.php?view=tracker or - in the case
of OpenWrt libraries - by carefully reviewing the changes made to
header files thorough the corresponding Git history.

In the future, the ABI_VERSION values must be bumped whenever the
library is updated to an incpompatible version but not with every
package update, in order to reduce the dependency churn in the
binary package repository.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

package/libs/libubox/Makefile

@@ -27,7 +27,7 @@ define Package/libubox
   SECTION:=libs
   CATEGORY:=Libraries
   TITLE:=Basic utility library
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=20170601
   DEPENDS:=
 endef
 

package/libs/mbedtls/Makefile

@@ -39,7 +39,7 @@ $(call Package/mbedtls/Default)
   CATEGORY:=Libraries
   SUBMENU:=SSL
   TITLE+= (library)
-  ABI_VERSION:=$(PKG_VERSION)-$(PKG_RELEASE)
+  ABI_VERSION:=12
 endef
 
 define Package/mbedtls-util

package/libs/ncurses/Makefile

@@ -41,7 +41,7 @@ define Package/libncurses
   URL:=http://www.gnu.org/software/ncurses/
   PROVIDES:=libncursesw
   DEPENDS:= +terminfo
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=6
 endef
 
 define Package/libncurses-dev

package/libs/openssl/Makefile

@@ -74,7 +74,7 @@ $(call Package/openssl/Default)
   CATEGORY:=Libraries
   DEPENDS:=+OPENSSL_WITH_COMPRESSION:zlib
   TITLE+= (libraries)
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=1.0.0
   MENU:=1
 endef
 

package/libs/readline/Makefile

@@ -31,7 +31,7 @@ define Package/libreadline
   CATEGORY:=Libraries
   TITLE:=Command lines edition library
   URL:=http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=7
 endef
 
 define Package/libreadline/description

package/libs/ustream-ssl/Makefile

@@ -25,7 +25,7 @@ define Package/libustream/default
   CATEGORY:=Libraries
   TITLE:=ustream SSL Library
   DEPENDS:=+libubox
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=20150806
 endef
 
 define Package/libustream-openssl

package/network/utils/iptables/Makefile

@@ -493,7 +493,7 @@ $(call Package/iptables/Default)
   SECTION:=libs
   CATEGORY:=Libraries
   DEPENDS:=+libip4tc +libip6tc +libxtables
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=0
   TITLE:=IPv4/IPv6 firewall - shared libiptc library (nf compatibility stub)
 endef
 
@@ -502,7 +502,7 @@ $(call Package/iptables/Default)
   SECTION:=libs
   CATEGORY:=Libraries
   TITLE:=IPv4 firewall - shared libiptc library
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=0
   DEPENDS:=+libxtables
 endef
 
@@ -511,7 +511,7 @@ $(call Package/iptables/Default)
   SECTION:=libs
   CATEGORY:=Libraries
   TITLE:=IPv6 firewall - shared libiptc library
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=0
   DEPENDS:=+libxtables
 endef
 
@@ -520,7 +520,7 @@ define Package/libxtables
  SECTION:=libs
  CATEGORY:=Libraries
  TITLE:=IPv4/IPv6 firewall - shared xtables library
- ABI_VERSION:=$(PKG_VERSION)
+ ABI_VERSION:=12
  DEPENDS:= \
 	+IPTABLES_CONNLABEL:libnetfilter-conntrack \
 	+IPTABLES_NFTABLES:libnftnl
@@ -531,7 +531,7 @@ define Package/libxtables-nft
  SECTION:=libs
  CATEGORY:=Libraries
  TITLE:=IPv4/IPv6 firewall - shared xtables nft library
- ABI_VERSION:=$(PKG_VERSION)
+ ABI_VERSION:=12
  DEPENDS:=libxtables
 endef
 

package/network/utils/iwinfo/Makefile

@@ -33,7 +33,7 @@ define Package/libiwinfo
   CATEGORY:=Libraries
   TITLE:=Generalized Wireless Information Library (iwinfo)
   DEPENDS:=+PACKAGE_kmod-cfg80211:libnl-tiny +libuci +libubus
-  ABI_VERSION:=$(PKG_RELEASE)
+  ABI_VERSION:=20181126
 endef
 
 define Package/libiwinfo/description

package/system/ubus/Makefile

@@ -36,7 +36,7 @@ define Package/libubus
   SECTION:=libs
   CATEGORY:=Libraries
   DEPENDS:=+libubox
-  ABI_VERSION:=$(PKG_VERSION)
+  ABI_VERSION:=20170705
   TITLE:=OpenWrt RPC client library
 endef