Merge pull request #1081 from metalefty/describe_cmake_flags

Describe CMake options added by myself

AUTHORS.TXT

@@ -1,5 +1,5 @@
 SoftEther VPN is developed by SoftEther VPN Project at University of Tsukuba.
-http://www.softether.org/
+https://www.softether.org/
 
 AUTHORS OF SOFTETHER VPN
 ------------------------
@@ -89,6 +89,7 @@ CONTRIBUTORS:
   - Johan de Vries <devries@wivion.nl>
   - Josh Soref <https://github.com/jsoref>
   - Joshua Perry <josh@6bit.com>
+  - Koichiro Iwao <meta@FreeBSD.org>
   - Luiz Eduardo Gava <luiz.gava@procempa.com.br>
   - macvk <tutumbul@gmail.com>
   - Maks Naumov <maksqwe1@ukr.net>
@@ -134,5 +135,5 @@ JOIN THE SOFTETHER VPN DEVELOPMENT
 Want to become a contributor? Please send us a patch.
 
 See also: SoftEther VPN Patch Acceptance Policy
-http://www.softether.org/5-download/src/9.patch
+https://www.softether.org/5-download/src/9.patch
 

configure

@@ -21,8 +21,12 @@ if [ ! -d "tmp" ]; then
   mkdir tmp
 fi
 
+if [ ! -z ${CMAKE_FLAGS+x} ]; then
+	CMAKE_FLAGS="${CMAKE_FLAGS}"
+fi
+
 if [ ! -z ${CMAKE_INSTALL_PREFIX+x} ]; then
-	CMAKE_FLAGS="-DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}"
+	CMAKE_FLAGS="-DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX} ${CMAKE_FLAGS}"
 fi
 
 if [ -z ${OPENSSL_ROOT_DIR} ]; then

src/BUILD_UNIX.md

@@ -5,6 +5,7 @@ This document describes how to build SoftEtherVPN for UNIX based Operating syste
   * [Install Requirements on Debian/Ubuntu](#install-requirements-on-debianubuntu)
   * [Install Requirements on macOS](#install-requirements-on-macos)
 - [Build from source code and install](#build-from-source-code-and-install)
+- [Additional Build Options](#additional-build-options)
 - [How to Run SoftEther](#how-to-run-softether)
   * [Start/Stop SoftEther VPN Server](#startstop-softether-vpn-server)
   * [Start/Stop SoftEther VPN Bridge](#startstop-softether-vpn-bridge)
@@ -18,18 +19,15 @@ This document describes how to build SoftEtherVPN for UNIX based Operating syste
 
 You need to install the following software to build SoftEther VPN for UNIX.
 
-- Linux, FreeBSD, Solaris or Mac OS X.
+- [CMake](https://cmake.org)
-- GNU Compiler Collection (gcc) and binary utilities. ***
+- C compiler (GCC, Clang, etc)
-- GNU Make (gmake).
+- C Library (BSD libc, GNU libc, musl libc, etc)
-- GNU C Library (glibc).
+- POSIX threads library (pthread)
-- POSIX Threads (pthread).
+- OpenSSL or LibreSSL (crypto, ssl)
-- OpenSSL (crypto, ssl).
+- make (GNU make, BSD make, etc)
-- libiconv.
+- libiconv
-- readline.
+- readline
-- ncurses.
+- ncurses
-
-*It has been noted that clang is also supported as an alternative to gcc.*
-
 
 ## Install requirements on Centos/RedHat
 
@@ -82,6 +80,38 @@ make -C tmp install
 
 Building without USE_MUSL environment variable set compiles, but produced executables exhibit bad run-time behaviour.
 
+# Additional Build Options
+
+There are some additional build options useful if you're a distro package maintainer and creating a package of SoftEther VPN. It is recommended that you only specify these options when you understand what happens.
+
+## Specify log, config, PID directories
+
+By default, SoftEther VPN writes out all files such as logs, config files, PID files under the same directory as `vpnserver`, `vpnbridge`, `vpnclient` executables. This behaviour is suitable when [using SoftEther without installation](#using-softether-without-installation) however not appropriate using with installation.
+Usually PID files are to put in `/var/run` or `/run`. Logs are `/var/log`. Other variable state information files including config files are `/var/lib` or `/var/db`.
+
+These directories can be changed at compile-time by specifying via CMake variables.
+* `SE_PIDDIR` - PID directory
+* `SE_LOGDIR` - root log directory
+* `SE_DBDIR`  - config files and variable state directory
+
+To specify directories, perform `./configure` like below.
+
+```bash
+CMAKE_FLAGS="-DSE_PIDDIR=/run/softether -DSE_LOGDIR=/var/log/softether -DSE_DBDIR=/var/lib/softether" ./configure
+```
+
+Please note that these directories are not created automatically after installation. Make sure to create these directories before starting SoftEther VPN Server, Bridge or Client.
+
+## Build without [cpu_features](https://github.com/google/cpu_features)
+
+SoftEther VPN uses cpu_features library to retrieve CPU features such as available processor instructions. However, cpu_features is not available on some architectures. Whether to build with cpu_features is auto detected but autodetection is not so smart.
+
+If you want to build without cpu_features explicitly, perform `./configure` like below.
+
+```bash
+CMAKE_FLAGS="-DSKIP_CPU_FEATURES" ./configure
+```
+
 # How to Run SoftEther
 
 ## Start/Stop SoftEther VPN Server
@@ -107,9 +137,7 @@ vpncmd
 
 Or you can also use VPN Server Manager GUI Tool on other Windows PC to
 connect to the VPN Server remotely. You can download the GUI Tool
-from http://www.softether-download.com/.
+from https://www.softether-download.com/.
-
-
 
 
 ## Start/Stop SoftEther VPN Bridge
@@ -135,7 +163,7 @@ vpncmd
 
 Or you can also use VPN Server Manager GUI Tool on other Windows PC to
 connect to the VPN Bridge remotely. You can download the GUI Tool
-from http://www.softether-download.com/.
+from https://www.softether-download.com/.
 
 
 ## Start/Stop SoftEther VPN Client
@@ -161,7 +189,7 @@ vpncmd
 
 Or you can also use VPN Client Manager GUI Tool on other Windows PC to
 connect to the VPN Client remotely. You can download the GUI Tool
-from http://www.softether-download.com/.
+from https://www.softether-download.com/.
 
 
 # About HTML5-based Modern Admin Console and JSON-RPC API Suite
@@ -205,4 +233,4 @@ In this case please do not run the `make install` command after compiling the so
 ************************************
 Thank You Using SoftEther VPN !
 By SoftEther VPN Open-Source Project
-http://www.softether.org/
+https://www.softether.org/

src/BUILD_WINDOWS.md

@@ -74,4 +74,4 @@ Download Links:
 ************************************
 Thank You Using SoftEther VPN !
 By SoftEther VPN Open-Source Project
-http://www.softether.org/
+https://www.softether.org/

src/WARNING.TXT

@@ -332,7 +332,7 @@ VPN Gate Academic Experiment Project is an online service operated for just
 the academic research purpose at the graduate school of University of Tsukuba,
 Japan. The purpose of this research is to expend our knowledge about the
 "Global Distributed Public VPN Relay Server" (GDPVRS) technology. For details,
-please visit http://www.vpngate.net/.
+please visit https://www.vpngate.net/.
 
 5.2. About VPN Gate Service
 SoftEther VPN Server and SoftEther VPN Client may contain "VPN Gate Service"
@@ -468,7 +468,7 @@ Gate Service's user illegally abused your VPN Gate Service and you have to
 decode the packet logs in order to comply the laws), contact the administrator
 of the VPN Gate Academic Experiment Service at Graduate School of University
 of Tsukuba, Japan. You can find the contact address at
-http://www.vpngate.net/. The administrator of VPN Gate Service will respond to
+https://www.vpngate.net/. The administrator of VPN Gate Service will respond to
 decode the packet logs if there is an appropriate and legal request from court
 or other judicial authorities, according to laws.