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NOTE: The instructions and examples are based on Windows 10.
EMQX includes Erlang NIF (Native Implmented Function) components, implemented in C/C++. To compile and link C/C++ libraries, the easiest way is perhaps to install Visual Studio.
Visual Studio 2019 is used in our tests. If you are like me (@zmstone), do not know where to start, please follow this OTP guide: https://github.com/erlang/otp/blob/master/HOWTO/INSTALL-WIN32.md
NOTE: To avoid surprises, you may need to add below two paths to Path
environment variable
and order them before other paths.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29910\bin\Hostx64\x64
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build
Depending on your visual studio version and OS, the paths may differ.
The first path is for rebar3 port compiler to find cl.exe
and link.exe
The second path is for CMD to setup environment variables.
Install Erlang/OTP 24.2.1 from https://www.erlang.org/downloads
You may need to edit the Path
environment variable to allow running
Erlang commands such as erl
from CMD.
To validate Erlang installation in CMD :
Start (or restart) CMD
Execute erl
command to enter Erlang shell
Evaluate Erlang expression halt().
to exit Erlang shell.
e.g.
PS C:\Users\zmsto> erl
Eshell V12.2.1 (abort with ^G)
1> halt().
All EMQX build/run scripts are either in bash
or escript
.
escript
is installed as a part of Erlang. To install a bash
environment in Windows, there are quite a few options.
Cygwin is what we tested with.
Add cygwin\bin
dir to Path
environment variable
To do so, search for Edit environment variable in control pannel and
add C:\tools\cygwin\bin
(depending on the location where it was installed)
to Path
list.
Validate installation.
Start (restart) CMD console and execute which bash
, it should
print out /usr/bin/bash
Some of the unix world tools are required to build EMQX. Including:
We recommend using scoop, or Chocolatey to install the tools.
When using scoop:
scoop install git curl make jq zip unzip
Clone the repo: git clone https://github.com/emqx/emqx.git
Start CMD
Execute vcvarsall.bat x86_amd64
to load environment variables
Change to emqx directory and execute make
'cl.exe' is not recognized as an internal or external command
This error is likely due to Visual Studio executables are not set in Path
environment variable.
To fix it, either add path like C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29910\bin\Hostx64\x64
to Paht
. Or make sure vcvarsall.bat x86_amd64
is executed prior to the make
command
fatal error C1083: Cannot open include file: 'assert.h': No such file or directory
If Visual Studio is installed correctly, this is likely LIB
and LIB_PATH
environment
variables are not set. Make sure vcvarsall.bat x86_amd64
is executed prior to the make
command
link: extra operand 'some.obj'
This is likely due ot the usage of GNU lnik.exe
but not the one from Visual Studio.
Exeucte link.exe --version
to inspect which one is in use. The one installed from
Visual Studio should print out Microsoft (R) Incremental Linker
.
To fix it, Visual Studio's bin paths should be ordered prior to Cygwin's (or similar installation's)
bin paths in Path
environment variable.
To start EMQX broker.
Execute _build\emqx\rel\emqx>.\bin\emqx console
or _build\emqx\rel\emqx>.\bin\emqx start
to start EMQX.
Then execute _build\emqx\rel\emqx>.\bin\emqx_ctl status
to check status.
If everything works fine, it should print out
Node 'emqx@127.0.0.1' 4.3-beta.1 is started
Application emqx 4.3.0 is running
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