From 217f52fb121ef92491e5d5f71394b07ce4ead1d0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9F=D0=B5=D1=82=D1=80=20=D0=A8=D1=83=D1=80=D0=B3=D0=B0?=
 =?UTF-8?q?=D0=BB=D0=B8=D0=BD?= <pshurgal@users.noreply.github.com>
Date: Tue, 9 Jan 2018 07:22:08 +0300
Subject: [PATCH]  CMake: CMAKE_INSTALL_PREFIX for Linux (#243)

* CMake: CMAKE_INSTALL_PREFIX for Linux

If on Linux system CMAKE_INSTALL_PREFIX is set it overrides
CPACK_PACKAGING_INSTALL_PREFIX key.

* Readme: readme for MinGW building and installation

* Update README.markdown
---
 CPackLists.txt  | 12 +++++-------
 README.markdown | 23 +++++++++++++++++++++++
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/CPackLists.txt b/CPackLists.txt
index d0c46b17..7a89ad0c 100644
--- a/CPackLists.txt
+++ b/CPackLists.txt
@@ -15,12 +15,10 @@
  #           DESTINATION include
  #           COMPONENT headers)
 
-IF(MINGW)
-   SET(CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}/g3log")
-ENDIF()
-
 IF(NOT MINGW)
-   IF(NOT CPACK_PACKAGING_INSTALL_PREFIX)
+   IF(NOT CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+      SET(CPACK_PACKAGING_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}")
+   ELSEIF(NOT CPACK_PACKAGING_INSTALL_PREFIX)
       SET(CPACK_PACKAGING_INSTALL_PREFIX /usr/local)
    ENDIF()
 ENDIF()
@@ -82,8 +80,8 @@ message( STATUS "make package" )
 message( STATUS "\nOption to install using 'make install'" )
 message( STATUS "Installation locations: " )
 message( STATUS "====================" )
-message( STATUS "Headers: ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_HEADERDIR}" )
-message( STATUS "Library installation directory: ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" )
+message( STATUS "Headers: ${CPACK_PACKAGING_INSTALL_PREFIX}/${CMAKE_INSTALL_HEADERDIR}" )
+message( STATUS "Library installation directory: ${CPACK_PACKAGING_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" )
 
 message( STATUS "For more information please see g3log/CPackLists.txt\n\n" )
 IF(NOT MINGW)
diff --git a/README.markdown b/README.markdown
index 07cc6b49..aa768b1c 100644
--- a/README.markdown
+++ b/README.markdown
@@ -211,6 +211,14 @@ cd ../../
 mkdir build
 cd build
 ```
+## Configuring for installing on nix (OSX, Linux, MinGW)
+Default install prefix on Linux is `/usr/local`
+To change it please set  `CPACK_PACKAGING_INSTALL_PREFIX `
+
+```
+cmake -DCPACK_PACKAGING_INSTALL_PREFIX= ...
+```
+
 
 ## Building on Linux
 ```
@@ -227,6 +235,21 @@ make package
 sudo dpkg -i g3log-<version>-Linux.deb
 ```
 
+## Building on MinGW
+```
+cmake -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Release ..
+make 
+```
+## Installing on MinGW
+```
+make install
+```
+Alternative using NSIS
+```
+make package
+g3log-<version>-win32.exe
+```
+
 ## Building on Windows
 Please use the Visual Studio 12 (2013) command prompt "Developer command prompt"
 ```