updated README

README

@@ -153,14 +153,14 @@ described in the following.
 BUILDING ON WINDOWS
 ===================
 
-Microsoft Visual Studio 2008 or newer is required to build the POCO C++ Libraries on
-Windows platforms. Solution and project files for all versions from 2008 to 2017 are included.
+Microsoft Visual Studio 2015 or newer is required to build the POCO C++ Libraries on
+Windows platforms. Solution and project files for all versions from 2015 to 2019 are included.
 64-bit (x64) builds are supported as well.
 You can either build from within Visual Studio (Build->Batch Build->Select All;Rebuild)
 or from the command line. To build from the command line, start the
 Visual Studio Command Prompt and cd to the directory where you
 have extracted the POCO C++ Libraries sources. Then, simply start the buildwin.cmd script
-and pass as argument the version of visual studio (90, 100, 110, etc.). You can customize
+and pass as argument the version of visual studio (140, 150, 160, etc.). You can customize
 what is being built by buildwin.cmd by passing appropriate command line arguments to
 it. Call buildwin.cmd without arguments to see what is available.
 
@@ -182,17 +182,6 @@ POCO C++ Libraries source tree does not contain spaces. Otherwise, the Microsoft
 message compiler may fail when building the Foundation library.
 
 
-BUILDING FOR WINDOWS CE
-
-Building for Windows CE 6.0 and Windows Embedded Compact 2013 is supported with
-Microsoft Visual Studio 2008 (CE 6.0), and Visual Studio 2012/2013 (WEC 2013), respectively.
-For CE 6.0, unless you have the Digi JumpStart Windows CE 6.0 SDK installed, you'll
-have to modify the included Visual Studio project and solution files. Same applies
-to the WEC2013 projects, which are based on the AM335X SDK.
-Please see the SDK Reference Documentation (http://pocoproject.org/documentation)
-for instructions.
-
-
 BUILDING ON UNIX/LINUX/macOS
 ============================
 

README.md

@@ -28,33 +28,117 @@ and [Getting Started](https://pocoproject.org/docs/00200-GettingStarted.html) do
 
 - CMake 3.5 or newer
 - A C++14 compiler (Visual C++ 2015, GCC 5.0, Clang 3.4, or newer)
-- OpenSSL headers and libraries (optional, but recommended; on macOS, via Homebrew: `brew install openssl`)
+- OpenSSL headers and libraries (optional, but recommended)
+- MySQL, PostgreSQL and ODBC client libraries (optional)
 
-### Building
+Most Unix/Linux systems already have OpenSSL preinstalled. If your system
+does not have OpenSSL, please get it from <http://www.openssl.org> or
+another source. You do not have to build OpenSSL yourself - a binary
+distribution is fine. For example, via Debian APT:
+
+```
+$ apt-get install openssl libssl-dev
+```
+
+On macOS, the easiest way to install OpenSSL is via [Homebrew](https://brew.sh):
+
+```
+$ brew install openssl
+```
+
+The easiest way to install OpenSSL on Windows is to use a binary
+(prebuild) release, for example the one from Shining Light
+Productions that comes with a
+[Windows installer](https://www.slproweb.com/products/Win32OpenSSL.html).
+
+On Windows, POCO can also use the native Windows TLS APIs (SChannel).
+
+### Installing All Dependencies (Linux and macOS)
+
+All dependencies can be installed with the following commands:
+
+#### Debian Linux (including Ubuntu and Raspbian)
+
+```
+$ sudo apt-get -y update && sudo apt-get -y install git g++ make cmake libssl-dev
+```
+
+#### RedHat Linux
+
+```
+$ sudo yum install -y git gcc-c++ make cmake3 openssl-devel
+```
+
+#### macOS (with Homebrew)
+
+```
+$ brew install cmake openssl
+```
+
+### Building with CMake (Linux, macOS, Windows)
+
+[CMake](https://cmake.org) (version 3.5 or newer) is the recommended build system for
+building the POCO C++ Libraries.
 
 ```
 $ git clone -b master https://github.com/pocoproject/poco.git
 $ cd poco
 $ mkdir cmake-build
 $ cd cmake-build
-$ cmake .. && cmake --build .
+$ cmake ..
+$ cmake --build . --config Release
 ```
 
-You can also run:
+On macOS, it's necessary to tell CMake where to find the OpenSSL headers
+and libraries by setting the `OPENSSL_ROOT_DIR` CMake variable.
+For example, if OpenSSL has been installed with Homebrew,
+the `cmake` invocation becomes:
+
+```
+$ cmake .. -DOPENSSL_ROOT_DIR=/usr/local/opt/openssl
+```
+
+Other common ways of building with CMake (e.g., `cmake-gui`) will also work.
+
+There are also a number of project-specific CMake variables that can be changed.
+
+
+#### Cross-Compiling
+
+With a proper CMake toolchain file (specified via the `CMAKE_TOOLCHAIN_FILE` CMake variable),
+the POCO C++ Libraries can be cross-compiled for embedded Linux systems:
+
+```
+$ cmake .. -DCMAKE_TOOLCHAIN_FILE=/path/to/mytoolchain.cmake -DCMAKE_INSTALL_PREFIX=/path/to/target
+```
+
+
+#### Installing
+
+The POCO C++ Libraries headers and libraries can be optionally be installed by building the `install` target.
 
 ```
 $ sudo cmake --build . --target install
 ```
 
-in the `cmake-build` directory to install POCO (default `/usr/local` on Linux or macOS).
+The default install location is `/usr/local/` on Linux and macOS and
+`C:\Program Files (x64)\` on Windows and can be overridden by setting
+the `CMAKE_INSTALL_PREFIX` CMake variable.
+
+
+### Building Without CMake
 
 If you do not want to or cannot use CMake, POCO can also be built with Visual Studio
-(project and solution files included) or GNU Make.
+(project and solution files included) or GNU Make (Linux, macOS and other supported Unix platforms).
 
 Please refer to the [documentation](https://pocoproject.org/docs) for more information.
 
+
+### Getting POCO via a Package Manager
+
 POCO can also be obtained via different [package managers](https://pocoproject.org/download.html).
 
+
 ## Community and Contributing
 
 POCO has an active user and contributing community, please visit our [website](https://pocoproject.org) and [blog](https://pocoproject.org/blog).