perl: version modules and non-base packages

Currently external modules and non-base packages are numbered
from their own internal number space, and even though the Perl
ABI number is embedded into them this isn't externally visible.

For example, perl-html-parser-3.72.1 could be built for ABI
5.26 or for 5.28, we can't easily tell.  This changes all of
that by embedding the ABI number into the filename.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

lang/perl/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2006-2016 OpenWrt.org
+# Copyright (C) 2006-2018 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -7,8 +7,10 @@
 
 include $(TOPDIR)/rules.mk
 
+include perlver.mk
+
 PKG_NAME:=perl
-PKG_VERSION:=5.28.0
+PKG_VERSION:=$(PERL_VERSION)
 PKG_RELEASE:=1
 
 PKG_SOURCE_URL:=\

lang/perl/perlmod.mk

@@ -1,7 +1,13 @@
 # This makefile simplifies perl module builds.
 #
 
-PERL_VERSION:=5.28
+include ../perl/perlver.mk
+
+ifneq ($(PKG_NAME),perl)
+  PKG_VERSION:=$(PKG_VERSION)+perl$(PERL_VERSION2)
+endif
+
+PERL_VERSION:=$(PERL_VERSION2)
 
 # Build environment
 HOST_PERL_PREFIX:=$(STAGING_DIR_HOSTPKG)/usr
@@ -9,7 +15,7 @@ ifneq ($(CONFIG_USE_GLIBC),)
 	EXTRA_LIBS:=bsd
 	EXTRA_LIBDIRS:=$(STAGING_DIR)/lib
 endif
-PERL_CMD:=$(STAGING_DIR_HOSTPKG)/usr/bin/perl$(PERL_VERSION).0
+PERL_CMD:=$(STAGING_DIR_HOSTPKG)/usr/bin/perl$(PERL_VERSION3)
 
 MOD_CFLAGS_PERL:=-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 $(TARGET_CFLAGS) $(TARGET_CPPFLAGS)
 ifdef CONFIG_PERL_THREADS

lang/perl/perlver.mk

@@ -0,0 +1,10 @@
+PERL_VERSION:=5.28.0
+
+PERL_EXPLODE:=$(subst ., ,$(PERL_VERSION))
+
+PERL_MAJOR:=$(word 1,$(PERL_EXPLODE))
+PERL_MINOR:=$(word 2,$(PERL_EXPLODE))
+PERL_REL:=$(word 3,$(PERL_EXPLODE))
+
+PERL_VERSION3:=$(PERL_VERSION)
+PERL_VERSION2:=$(PERL_MAJOR).$(PERL_MINOR)