update build instructions

Author: electronstudio

BUILDING.rst

@@ -56,9 +56,7 @@ Build and install Raylib from the raylib-c directory.
    copy raylib\Release\raylib.lib ..\..
    cd ..\..
 
-To update the dynamic libs, download the official release,
-e.g. https://github.com/raysan5/raylib/releases/download/3.7.0/raylib-3.7.0_win64_msvc16.zip
-and extract ``raylib.dll`` into ``dynamic/raylib``.
+
 
 To build a binary wheel distribution:
 
@@ -69,12 +67,10 @@ To build a binary wheel distribution:
    pip3 install wheel
    python setup.py bdist_wheel
 
-Alternatively, if you don’t want the static binaries and just want to
-use DLLs with raylib.dynamic:
-
-::
+.. TODO::
+   There's a hardcoded path (to the raylib header files) in `raylib/build.py` you will probably need to edit.
+   Would be useful if some Windows user could figure out how to auto detect this.
 
-   python3 setup_dynamic.py bdist_wheel
 
 Then install it:
 
@@ -88,8 +84,6 @@ here.)
 Linux manual build
 ~~~~~~~~~~~~~~~~~~~~~~
 
-These instructions have been tested on Ubuntu 20.10 and 16.04.
-
 Clone this repo including submodules so you get correct version of
 Raylib.
 
@@ -99,6 +93,10 @@ Raylib.
 
 Build and install Raylib from the raylib-c directory.
 
+.. note::
+   You can instead use a different version of Raylib you installed from elsewhere, and it should still
+   work!
+
 ::
 
    sudo apt install cmake libasound2-dev mesa-common-dev libx11-dev libxrandr-dev libxi-dev xorg-dev libgl1-mesa-dev libglu1-mesa-dev
@@ -131,7 +129,7 @@ Build
    rm -rf build raylib/_raylib_cffi.*
    python3 raylib/build.py
 
-..  note:: (Optional) To update the Linux dynamic libs (names will be different on other platfroms):
+..  note:: (Optional) To update the Linux dynamic libs (names will be different on other platforms):
 
     ::
 
@@ -185,10 +183,13 @@ Build and install Raylib from the raylib-c directory.
 
 ::
 
-   cd raylib-python-cffi/raylib-c/src
-   make
-   sudo cp libraylib.a  /usr/local/lib/libraylib.a
-   cd ../..
+    cd raylib-python-cffi/raylib-c/
+    mkdir build
+    cd build
+    cmake -DWITH_PIC=on -DCMAKE_BUILD_TYPE=Release ..
+    make
+    sudo make install
+    cd ../..
 
 
 Build and install module.