Support mutiple-compiler config and select

[chen3feng]

cc_toolchain(
    name = 'gcc',
    version = '4.1.2',
    path = '/usr/local/bin'
)

cc_toolchain(
    name = 'clang',
    version = '4.1.2',
    cpp = 'clang -E',
    cc = 'clang',
    cxx = 'clang++'
)

cc_config(
    toolchain = 'gcc-4.1.2'
)

$ blade build --cc=gcc-4.1.2

[ericuni]

In my env, I have /usr/bin/gcc-7, so I add the following to BLADE_ROOT

cc_toolchain(
    name = 'gcc',
    version = '7',
    path = '/usr/bin'
)

When I run blade build, it says NameError: name 'cc_toolchain' is not defined.
I am using the lasted master branch of this repo.

[chen3feng]

cc_toolchain只是设想并未实现，用PATH环境变量 Eric Wang <notifications@github.com> 于 2018年9月24日周一 09:46写道：

…

In my env, I have /usr/bin/gcc-7, so I add the following to BLADE_ROOT cc_toolchain( name = 'gcc', version = '7', path = '/usr/bin' ) When I run blade build, it says NameError: name 'cc_toolchain' is not defined. I am using the lasted master branch of this repo. — You are receiving this because you were assigned. Reply to this email directly, view it on GitHub <#39 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AB5-SmbQktRKj3EgJqFnBCYCyxin4bw_ks5ueDlvgaJpZM4AqgjK> .

[ericuni]

这样啊, 了解了

[hailiang-wang]

同是在Mac下使用，请问环境变量怎么设置？

[chen3feng]

通过PATH/CC/CXX等环境变量
https://github.com/chen3feng/typhoon-blade/blob/master/doc/config_files_zn_CN.md#%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F