added cmake detection for packages

Note:

The current implementation can be summarized like this:

- check if $runcmake is set to '1' and if there is no Makefile but a
  CMakeLists.txt file inside of the srcdir
- create a dedicated 'build' directory and cd into it
- run cmake using the provided $cmakeopt

doc/PKG-BUILD-VARS

@@ -85,10 +85,12 @@ pyscript ...... script to run 'setup.py', python by default.
 pyconfopt ..... options for 'setup.py' - Python setup scripts
 plconfopt ..... options for 'Makefile.pl' - Perl setup scripts
 
+runcmake ...... set to '0' if you want to skip running 'cmake' (default 1)
 runxmkmf ...... set to '0' if you want to skip running 'xmkmf'
 runmkpl ....... set to '0' if you want to skip running 'perl Makefile.PL'
 runpysetup .... set to '0' if you want to skip running 'python setup.py'
 
+cmakeopt ...... options for 'cmake'
 makeopt ....... options for 'make' (default = ' ')
 makeinstopt ... options for 'make install' (default = 'install')
 

lib/functions.in

@@ -929,6 +929,16 @@ build_this_package() {
 			  fi
 			fi
 
+			# CMake based Makefile generation
+			#
+			if [ -f CMakeLists.txt -a $runcmake = 1 -a ! -f Makefile ]; then
+				# use a dedicated build directory
+				mkdir -p build
+				cd build
+				eval echo "Running cmake $cmakeopt"
+				cmake $( eval echo $cmakeopt ) ..
+			fi
+
 			# automated package build
 
 			# styles without make run first:
@@ -1128,6 +1138,7 @@ detect_confdir()
 init_vars_and_hooks()
 {
 	makeopt='CC="$CC" CPP="$CPP" CXX="$CXX"'
+	cmakeopt='-DCMAKE_INSTALL_PREFIX="$root/$prefix"'
 
 	if atstage toolchain; then
 		makeopt="$makeopt"' prefix="$root${prefix:+/$prefix}"'
@@ -1171,7 +1182,7 @@ init_vars_and_hooks()
 	taropt="--use-compress-program=bzip2 -xf"
 
 	mainfunction="build_this_package"
-	runconf=1 ; runxmkmf=1 ; runmkpl=1 ; runpysetup=1 ; autopatch=1
+	runconf=1 ; runcmake=1 ; runxmkmf=1 ; runmkpl=1 ; runpysetup=1 ; autopatch=1
 	autoextract=1 ; chownsrcdir=1 ; nocvsinsrcdir=1 ; cleanconfopt=1
 	patchopt="-bfp1 -z .orig"
 	createprefix=1 ; createdocs= ; rmemptydir=