sublime custom build command, how to? - sublimetext2

Question

I have a program, which is using what they called wmake to build the code and it's very convenient. Suppose I have a folder and a C++ file: /path/to/file.C, all I have to do is go to /path/to folder and then type the wmake command and return and all is set.
When I am using sublimetext, I would like to open this file.C file and then ctrl+B to build it, but it doesn't work. Currently I customized a build system like:
{
"cmd": "wmake"
}
the error shows as
[Errno 2] No such file or directory
[cmd: wmake]
[dir: /path/to/file.C]
[path: /home/meee/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/bin]
[Finished]
Anyone knows how to customize a build system in sublimetext2? I read the online mannual but still have no clue. Thanks
My aim
All I want to do is to get the same effect as I type in shell window a simple
wmake /path/to
Edit-1
I tried this, it's not working either, the same error. I dont understand why "no such file"?
{
"cmd": "wmake",
"selector" : "source.C",
"shell": false,
"working_dir" : "$file_path",
"variants":
[
{
"name": "Run",
"cmd": ["bash", "-c", "wmake '${file_path}'"]
}
]
}
Edit-2
I tried using full path of wmake, and the error complains environment variable $WM_OPTIONS not set. So in shell, every time the ~/.bashrc is auto loaded, and to initialize all the environment variables, but this is not so in Sublime!!!!!!!!!!!!! What should I do???
{
"cmd": "/fullpath/to/wmake",
"selector" : "source.C",
"shell": false,
"working_dir" : "$file_path",
"variants":
[
{
"name": "Run",
"cmd": ["bash", "-c", "/fullpath/to/wmake '${file_path}'"]
}
]
}

Answer 1

Your build command isn't complete. See my customized C build:
{
"cmd" : ["/usr/local/gfortran/bin/gcc", "$file_name", "-o", "${file_base_name}", "-lgsl","-lgslcblas", "-lm" , "-Wall"],
"selector" : "source.c",
"shell":false,
"working_dir" : "$file_path",
"variants":
[
{
"name": "Run",
"cmd": ["bash", "-c", "/usr/local/gfortran/bin/gcc '${file}' -lgsl -lgslcblas -lm -Wall -o '${file_path}/${file_base_name}' && '${file_path}/${file_base_name}'"]
}
]
}