README.md: update

README.md

@@ -0,0 +1,58 @@
+OpenScop Library 0.9.6
+======================
+
+Installation
+------------
+
+Arch Linux users can install the library via the AUR:
+
+```.bash
+$ yay -S osl
+```
+
+Dependencies
+------------
+
+Recommended packages:
+
+```.bash
+# For Ubuntu
+$ apt install build-essential autoconf automake autotools-dev libtool libgmp-dev autoconf-archive ccache doxygen
+# For Fedora
+$ dnf install @c-development @development-tools libtool gmp-devel autoconf-archive ccache
+# For Arch Linux
+$ pacman -S base-devel posix-c-development autoconf-archive gmp ccache
+```
+
+Build + installation via autotools
+----------------------------------
+
+```.bash
+$ autoreconf -fi
+$ mkdir build
+$ cd build
+$ ../configure CC="ccache cc"
+$ make -j$(nproc)
+$ make install
+```
+
+
+Alternative: build and install with CMake (experimental, may not work!)
+-----------------------------------------------------------------------
+
+```.bash
+$ mkdir build
+$ cd build
+$ cmake .. # -DCMAKE_INSTALL_PREFIX="/your/install/directory"
+$ make
+$ make test
+$ # make install # sudo make install # su -c "make install"
+$ make doc
+```
+
+
+Support
+-------
+
+Please contact:
+[email protected]