BUILDING WITH GNU AUTOTOOLS
===========================

Prerequisites:
  - GNU Autotools (autoconf, automake, libtool)
  - C compiler (gcc or clang)
  - OpenSSL development libraries
  - Linux kernel headers (for TUN/TAP)

Quick Build:
  ./autogen.sh           # Only needed first time
  ./configure           # Configure build
  make                  # Build everything
  make check            # Run tests
  sudo make install     # Install to system

Configuration Options:
  --prefix=PATH         Install prefix (default: /usr/local)
  --enable-debug        Enable debug output
  --disable-tests       Skip test compilation
  CFLAGS="-O2"          Set custom compiler flags

Files Generated:
  configure       - Configuration script
  config.h        - Configuration header
  Makefile        - Build rules
  config.log      - Configuration log
  config.status   - Configuration status

Maintainers:
  To update build system after changes:
    autoreconf -fiv

For more info: https://www.gnu.org/software/automake/manual/