[cmake-developers] CMAKE_C_COMPILER_ARG# not documented?

Robert Dailey rcdailey.lists at gmail.com
Thu Jul 19 14:17:05 EDT 2018


On Thu, Jul 19, 2018 at 1:13 PM, Robert Dailey <rcdailey.lists at gmail.com> wrote:
> On Thu, Jul 19, 2018 at 1:07 PM, Brad King <brad.king at kitware.com> wrote:
>> On 07/19/2018 11:58 AM, Robert Dailey wrote:
>>> I can't remember where I heard about these CMake variables, but in one
>>> of my toolchain files I do this:
>>>
>>> set( CMAKE_C_COMPILER_ARG1 -m32 )
>>> set( CMAKE_CXX_COMPILER_ARG1 -m32 )
>>
>> They are not documented because they are internal implementation
>> details.  Projects should not be setting them.
>
> I think this was recommended to me because `-m32` had to be the first
> argument to clang. I'll try to dig up the conversation, I forgot who
> recommended it and why.

Found it:
https://cmake.org/pipermail/cmake/2013-March/054161.html

Looks like something Bill Hoffman suggested years ago. I still don't
remember why I started using it, it was definitely to work around some
sort of issue. What is the proper, public API solution that gives
identical functionality? Should I be using `CMAKE_C_COMPILER` instead,
and appending to it as a string from my toolchain file?

Thanks in advance.


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