Update INSTALL.md

Author: Kappuccino111

INSTALL

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+
+# OpenPrinting libppd v2.0.0 Installation Guide
+------------------------------------------------------------
+
+## Overview
+
+This guide provides instructions for compiling and installing OpenPrinting libppd version 2.0.0 from source code. For more details, refer to "README.md" and for a change log, see "CHANGES.md".
+
+### Before You Begin
+
+#### Prerequisites
+- ANSI-compliant C and C++ compilers (tested with several versions of GCC)
+- make program and POSIX-compliant shell (/bin/sh)
+- GNU make recommended (especially for BSD users)
+
+#### Dependencies
+- libcups of CUPS 2.2.2 or newer
+- libcupsfilters 2.0.0 or newer
+
+### Compiling the GIT Repository Code
+- libppd GIT repository does not include a pre-built configure script.
+- Run GNU autoconf (2.65 or higher) to create it:
+  ```
+  ./autogen.sh
+  ```
+
+### Configuration
+- Use the "configure" script in the main directory:
+  ```
+  ./configure
+  ```
+- Default installation path is "/usr".
+- For custom installation path, use the "--prefix" option:
+  ```
+  ./configure --prefix=/some/directory
+  ```
+- Use `./configure --help` for all configuration options.
+- Set environment variables for libraries in non-default locations.
+
+### Building the Software
+- Run `make` (or `gmake` for BSD systems) to build the software.
+
+### Installing the Software
+- After building, install the software with:
+  ```
+  make install
+  ```
+- For BSD systems:
+  ```
+  gmake install
+  ```
+
+### Packaging for Operating System Distributions
+- libppd is for retro-fitting legacy CUPS drivers using PPD files.
+- Needed if Printer Applications are installed as classic packages (RPM, DEB).
+- Not required for Printer Application Snaps or for modern IPP printers only.
+
+## Installing Required Tools
+
+### For Debian/Ubuntu-based Systems
+- Install C and C++ compilers, make, autoconf:
+  ```
+  sudo apt-get install build-essential autoconf
+  ```
+- Install libcups and libcupsfilters
+
+### For Red Hat/Fedora-based Systems
+- Install C and C++ compilers, make, autoconf:
+  ```
+  sudo dnf install gcc gcc-c++ make autoconf
+  ```
+- Install libcups and libcupsfilters:
+
+Note: The above commands are for common Linux distributions. For other operating systems or distributions, refer to respective package management instructions.