libpng: Move libpng-compat package into own build file.

Fixes #10521.

compat-libpng/compat-libpng.nm

@@ -0,0 +1,61 @@
+###############################################################################
+# IPFire.org    - An Open Source Firewall Solution                            #
+# Copyright (C) - IPFire Development Team <info@ipfire.org>                   #
+###############################################################################
+
+name       = compat-libpng
+version    = 1.5.18
+release    = 1
+thisapp    = libpng-%{version}
+
+groups     = System/Libraries
+url        = http://www.libpng.org/pub/png/
+license    = zlib
+summary    = A library of functions for manipulating PNG image format files.
+
+description
+	The libpng package contains a library of functions for creating and
+	manipulating PNG (Portable Network Graphics) image format files.
+	PNG is a bit-mapped graphics format similar to the GIF format. PNG
+	was created to replace the GIF format, since GIF uses a patented
+	data compression algorithm.
+end
+
+source_dl +=  http://downloads.sourceforge.net/project/libpng/libpng15/%{version}/
+source_dl +=  http://downloads.sourceforge.net/project/libpng/history/libpng15/%{version}/
+
+sources    = %{thisapp}.tar.xz
+
+build
+	requires
+		pkg-config
+		zlib-devel
+	end
+
+	install
+		# Install just the library and no headers.
+		mkdir -pv %{BUILDROOT}%{libdir}
+		install -m 755 .libs/libpng15.so.15.18.0 %{BUILDROOT}%{libdir}
+		ln -svf libpng15.so.15.18.0 %{BUILDROOT}%{libdir}/libpng15.so.15
+	end
+end
+
+packages
+	package %{name}
+		provides
+			libpng = %{thisver}
+		end
+
+		obsoletes
+			libpng-compat
+		end
+
+		conflicts
+			libpng <= %{thisver}
+		end
+	end
+
+	package %{name}-debuginfo
+		template DEBUGINFO
+	end
+end

libpng/libpng.nm

@@ -5,9 +5,7 @@
 
 name       = libpng
 version    = 1.6.10
-release    = 1
-
-compat_ver = 1.5.17
+release    = 2
 
 groups     = System/Libraries
 url        = http://www.libpng.org/pub/png/
@@ -25,35 +23,11 @@ end
 source_dl  = http://downloads.sourceforge.net/project/libpng/libpng16/%{version}/
 source_dl += http://downloads.sourceforge.net/project/libpng/history/libpng16/%{version}/
 
-# Source URL for comat package.
-source_dl +=  http://downloads.sourceforge.net/project/libpng/libpng15/%{compat_ver}/
-source_dl +=  http://downloads.sourceforge.net/project/libpng/history/libpng15/%{compat_ver}/
-
-sources    = %{thisapp}.tar.xz
-
-# File for compat package.
-sources   += %{name}-%{compat_ver}.tar.xz
-
 build
 	requires
 		pkg-config
 		zlib-devel
 	end
-
-	# Build compat package.
-	build_cmds
-		cd %{DIR_SRC}/%{name}-%{compat_ver}
-		./configure %{configure_options}
-
-		make %{PARALLELISMFLAGS}
-	end
-
-	# Install compat package.
-	install_cmds
-		cd %{DIR_SRC}/%{name}-%{compat_ver}
-		install -m 755 .libs/libpng15.so.15.17.0 %{BUILDROOT}%{libdir}
-		ln -svf libpng15.so.15.17.0 %{BUILDROOT}%{libdir}/libpng15.so.15
-	end
 end
 
 packages
@@ -65,14 +39,6 @@ packages
 		requires = zlib-devel
 	end
 
-	package %{name}-compat
-		summary = Compat libraries of %{thisapp}.
-
-		files
-			%{libdir}/%{name}15.so*
-		end
-	end
-
 	package %{name}-debuginfo
 		template DEBUGINFO
 	end