updated build instructions

README.md

@@ -2,24 +2,46 @@
 Common C++ classes and routines used by my applications such as argument parser, IO and conversion utilities.
 
 ## Build instructions
-Building the library is simple:
+### Requirements
+* C++ compiler supporting C++11 (I've tested GNU g++, Clang and mingw-w64 yet.)
+* CMake to build
+* cppunit to build and run unit tests after building
+* The c++utilities library only depends on the C++ standard library. For Dependencies of my other projects
+  see the README.md of these projects.
+
+### How to build
+Just run:
+```
+cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="/where/you/want/to/install" "path/to/projectdirectory"
+make
+make check # build and run unit tests (optional)
+make install
 ```
-INSTALL_ROOT=/where/you/want/to/install qmake-qt5 c++utilities.pro
+
+Building with qmake is also possible:
+```
+INSTALL_ROOT="/where/you/want/to/install" qmake-qt5 "path/to/projectfile"
 make && make install
 ```
-As you can see, the qmake build system is used. However the library itself does *not* depend on Qt.
 
-It is also possible to build the library using CMake:
+Building for Windows with Mingw-w64 cross compiler can be utilized using a small
+[cmake wrapper from Fedora](https://aur.archlinux.org/cgit/aur.git/tree/mingw-cmake.sh?h=mingw-w64-cmake):
 ```
-cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/where/you/want/to/install project/directory
+${_arch}-cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="/where/you/want/to/install" "path/to/projectdirectory"
 make && make install
 ```
+To create *.ico files for application icons ffmpeg is required.
+
+In any case, the make option *-j* can be used for concurrent compilation.
 
-In any case, the make option *-j* might be used to compile multiple files in parallel.
+### Creating Arch Linux package
+The repository PKGBUILDs (also on GitHub) contains files for building Arch Linux packages.
+PKGBUILD files to build for Windows using the Mingw-w64 compiler are also included.
 
-The repository PKGBUILDs (also on GitHub) contains files for building Arch Linux packages. A PKGBUILD file to build for Windows using the Mingw-w64 compiler is also included.
+### Notes
+* Because of [GCC Bug 66145](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66145) usage of the new libstdc++ ABI
+  is currently disabled. Linking against cppunit built using new libstdc++ ABI isn't possible.
 
 ## TODO
-- provide unit tests
 - rewrite argument parser
 - remove unused features