When compiling pcl-ros, bitbake aborts because for compiling the
Crypto library in libpoco, it needs the openssl headers.

The condensed error output is

** Compiling src/CipherKeyImpl.cpp (debug, shared)
arm-oe-linux-gnueabi-g++  -march=armv5te -marm -mthumb-interwork
-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed
--sysroot=/home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm
-I ... -DPOCO_BUILD_HOST=host -DPOCO_NO_WSTRING -DPOCO_UNBUNDLED
-D_XOPEN_SOURCE=500 -D_BSD_SOURCE -D_REENTRANT -D_THREAD_SAFE
-DPOCO_NO_FPENVIRONMENT  -g -D_DEBUG -fPIC -c src/CipherKeyImpl.cpp
-o ...
In file included from include/Poco/Crypto/CipherKeyImpl.h:44:0,
                 from include/Poco/Crypto/CipherKey.h:44,
                 from src/CipherKey.cpp:37:
include/Poco/Crypto/OpenSSLInitializer.h:45:33: fatal error: openssl/opensslconf.h: No such file or directory
 #include <openssl/opensslconf.h>
                                 ^
compilation terminated.
In file included from include/Poco/Crypto/CipherKeyImpl.h:44:0,
                 from src/CipherKeyImpl.cpp:37:
include/Poco/Crypto/OpenSSLInitializer.h:45:33: fatal error: openssl/opensslconf.h: No such file or directory
 #include <openssl/opensslconf.h>
                                 ^
compilation terminated.
make[1]: *** [.../tmp-eglibc/work/armv5te-oe-linux-gnueabi/libpoco/1.4.6p1-r0/poco-1.4.6p1-all/Crypto/obj/Linux/armv5te/debug_shared/CipherKey.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make -C /home/lukas/oe-core/build/tmp-eglibc/work/armv5te-oe-linux-gnueabi/libpoco/1.4.6p1-r0/poco-1.4.6p1-all/Util
make[1]: *** [.../tmp-eglibc/work/armv5te-oe-linux-gnueabi/libpoco/1.4.6p1-r0/poco-1.4.6p1-all/Crypto/obj/Linux/armv5te/debug_shared/CipherKeyImpl.o] Error 1
make[1]: Entering directory `/home/lukas/oe-core/build/tmp-eglibc/work/armv5te-oe-linux-gnueabi/libpoco/1.4.6p1-r0/poco-1.4.6p1-all/Util'

The error message when compiling nodelet, which links the poco library, is:

| Linking CXX executable devel/lib/nodelet/nodelet
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/x86_64-linux/usr/bin/cmake -E cmake_link_script CMakeFiles/nodelet.dir/link.txt --verbose=1
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/x86_64-linux/usr/bin/armv5te-oe-linux-gnueabi/arm-oe-linux-gnueabi-g++    -march=armv5te -marm -mthumb-interwork  --sysroot=/home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm  -O2 -pipe -g -feliminate-unused-debug-types -fpermissive -fvisibility-inlines-hidden -fpermissive  -march=armv5te -marm -mthumb-interwork  --sysroot=/home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm  -O2 -pipe -g -feliminate-unused-debug-types -fpermissive -fvisibility-inlines-hidden -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed  -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed CMakeFiles/nodelet.dir/src/nodelet.cpp.o  -o devel/lib/nodelet/nodelet -rdynamic devel/lib/libnodeletlib.so -luuid -lbondcpp -luuid -lcpp_common -lroscpp_serialization -lrostime -lboost_date_time-mt -lboost_system-mt -lboost_thread-mt -lroscpp -lboost_signals-mt -lboost_filesystem-mt -lrosconsole -lboost_regex-mt -llog4cxx -lxmlrpcpp -ltinyxml -lclass_loader -lPocoFoundation -ldl -lconsole_bridge -lroslib -Wl,-rpath,/home/lukas/oe-core/build/tmp-eglibc/work/armv5te-oe-linux-gnueabi/nodelet/1.8.0-r0/nodelet_core-1.8.0/nodelet/build/devel/lib:
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucd_stage1'
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucd_records'
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucp_gentype'
| /home/lukas/oe-core/build/tmp-eglibc/sysroots/qemuarm/usr/lib/libPocoFoundation.so: undefined reference to `_pcre_ucd_stage2'
| collect2: error: ld returned 1 exit status
| make[2]: *** [devel/lib/nodelet/nodelet] Error 1

This commit formats the libpoco recipe to follow the common
OpenEmbedded style more closely and removes a comment that points
to warnings that do not occur with the current recipe.

A previously written recipe for the poco library and
a special OpenEmbedded config file for poco is included from
https://gitorious.digitalstrom.org/dss-oe/dss-oe/blobs/raw/master/dS/meta-dss11-production/recipes-support/poco/poco_1.3.6p2.bb
and https://gitorious.digitalstrom.org/dss-oe/dss-oe/blobs/raw/master/dS/meta-dss11-production/recipes-support/poco/files/OE



This recipe and the config is redistributed here under the same
license agreement as the original.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@oss.bmw-carit.de>

The flann library is required by the ROS pcl package.

The poco library is used by the class loader.

This commit adds the eigen library from Kartik Mohta's OpenEmbedded
layer. Acknowledgements are added in the README file.