Update Readme

README.md

@@ -48,7 +48,7 @@ You will need the tools :
 - `six` : use 'pip install six --user'
 - `git`
 
-For Desktop : you will need [Qt5](https://www.qt.io/download-thank-you) (_5.12 or newer_). `C++11` support is required!
+For Desktop : you will need [Qt5](https://www.qt.io/download-thank-you) (_5.15 or newer_). `C++11` support is required!
 
 ### Set your environment
 
@@ -58,8 +58,8 @@ For Desktop : you will need [Qt5](https://www.qt.io/download-thank-you) (_5.12 o
 
 2. You have to set the environment variable `Qt5_DIR` to point to the path containing the cmake folders of Qt5, and the `PATH` to the Qt5 `bin`. Example:
 
-        Qt5_DIR="~/Qt/5.12.5/gcc_64/lib/cmake/Qt5"
-        PATH="~/Qt/5.12.5/gcc_64/bin/:$PATH"
+        Qt5_DIR="~/Qt/5.15.2/gcc_64/lib/cmake/Qt5"
+        PATH="~/Qt/5.15.2/gcc_64/bin/:$PATH"
 
 Note: If you have the third party tool `qtchooser` installed : 
         eval "$(qtchooser -print-env)"
@@ -177,18 +177,14 @@ For example:
 
 ## Specific instructions for the Windows platform
 
-64-bit version is not fully supported at this moment by Linphone Desktop and wasn't tested.
-If a build for 64bits is needed, replace all `mingw32` by `mingw64`, `i686` by `x86_64`, `-A Win32` by `-A x64` or simply remove it.
-
 1. Install main tools:
   - `MinGW/MSYS2` : [download](https://www.msys2.org/)
     - Follow instructions on their "Getting Started" page.
     - Install toolchains and prepare python:
-      - `pacman -Sy --needed base-devel mingw-w64-i686-toolchain`
+      - `pacman -Sy --needed base-devel mingw-w64-x86_64-toolchain`
       - `pacman -S python3-pip` in `MSYS2 MSYS` console
       - `python3 -m pip install pystache six` in `cmd`
-      - In this order, add `C:\msys64\mingw<N>\bin`, `C:\msys64\` and `C:\msys64\usr\bin` in your PATH environement variable from Windows advanced settings. Binaries from the msys folder (not from mingw32/64) doesn't fully support Windows Path and thus, they are to be avoided.
-*<N> is the version of MinGW32/64*
+      - In this order, add `C:\msys64\mingw64\bin`, `C:\msys64\` and `C:\msys64\usr\bin` in your PATH environement variable from Windows advanced settings. Binaries from the msys folder (not from mingw32/64) doesn't fully support Windows Path and thus, they are to be avoided.
     
 When building the SDK, it will install automatically from MSYS2 : `toolchain`, `python`, `doxygen`, `perl`, `yasm`, `gawk`, `bzip2`, `nasm`, `sed`, `patch`, `pkg-config`, `gettext`, `glib2`, `intltool` and `graphviz` (if needed)
 
@@ -196,15 +192,13 @@ When building the SDK, it will install automatically from MSYS2 : `toolchain`, `
   
   - Visual Studio must also be properly configured with addons. Under "Tools"->"Obtain tools and features", make sure that the following components are installed:
     - Tasks: Select Windows Universal Platform development, Desktop C++ Development, .NET Development
-    - Under "Installation details". Go to "Desktop C++ Development" and add "SDK Windows 8.1 and SDK UCRT"
-    - Individual component: Windows 8.1 SDK
 
-2. Ensure that you have downloaded the `Qt msvc2015 version` or `Qt msvc2017 version` (32-bit). 
+2. Ensure that you have downloaded the `Qt msvc2019 version` (64-bit). Note that `Qt msvc2019` can be use with earlier version of Visual Studio.
 
-3. Or open a Command line with Visual Studio `Developer Command Prompt for VS 2017` and call qtenv2.bat that is in your qt binaries eg: `C:\Qt\<version>\msvc2017\bin\qtenv2.bat`
+3. Or open a Command line with Visual Studio `Developer Command Prompt for VS 2019` and call qtenv2.bat that is in your qt binaries eg: `C:\Qt\<version>\msvc2019\bin\qtenv2.bat`
 
-4. Build as usual with adding `-A Win32` to `cmake ..` (General Steps) :
-  - `cmake .. -DCMAKE_BUILD_PARALLEL_LEVEL=10 -DCMAKE_BUILD_TYPE=RelWithDebInfo -A Win32`
+4. Build as usual with adding `-A x64` to `cmake ..` (General Steps) :
+  - `cmake .. -DCMAKE_BUILD_PARALLEL_LEVEL=10 -DCMAKE_BUILD_TYPE=RelWithDebInfo -A x64`
 The default build is very long. It is prefered to use the Ninja generator `-G "Ninja"`
   - `cmake --build . --target ALL_BUILD --parallel 10 --config RelWithDebInfo`