git: Moved build instructions from the readme to individual files

dist/compiling/linux.md

@@ -0,0 +1,41 @@
+### Compiling ImHex on Linux
+
+Dependency installation scripts are available for many common Linux distributions in the [/dist](dist) folder.
+After all the dependencies are installed, run the following commands to build ImHex:
+
+```sh
+mkdir -p build
+cd build
+CC=gcc-12 CXX=g++-12 cmake                    \
+    -DCMAKE_BUILD_TYPE=Release                \
+    -DCMAKE_INSTALL_PREFIX="/usr" 	          \
+    -DCMAKE_C_COMPILER_LAUNCHER=ccache        \
+    -DCMAKE_CXX_COMPILER_LAUNCHER=ccache      \
+    -DCMAKE_C_FLAGS="-fuse-ld=lld"            \
+    -DCMAKE_CXX_FLAGS="-fuse-ld=lld"          \
+    -DCMAKE_OBJC_COMPILER_LAUNCHER=ccache     \
+    -DCMAKE_OBJCXX_COMPILER_LAUNCHER=ccache   \
+    -DRUST_PATH="$HOME/.cargo/bin/"           \
+    ..
+make -j 4 install
+```
+
+---
+
+Put the ImHex executable into the `/usr/bin` folder.
+Put libimhex.so into the `/usr/lib` folder.
+Configuration files go to `/usr/etc/imhex` or `~/.config/imhex`.
+All other files belong in `/usr/share/imhex` or `~/.local/share/imhex`:
+
+```
+Patterns: /usr/share/imhex/patterns
+Pattern Includes: /usr/share/imhex/includes
+Magic files: /usr/share/imhex/magic
+Python: /usr/share/imhex/lib/pythonX.X
+Plugins: /usr/share/imhex/plugins
+Configuration: /etc/xdg/imhex/config
+```
+
+All paths follow the XDG Base Directories standard, and can thus be modified
+with the environment variables `XDG_CONFIG_HOME`, `XDG_CONFIG_DIRS`,
+`XDG_DATA_HOME` and `XDG_DATA_DIRS`.