Re: [boost] CMake - one more time

Subject: Re: [boost] CMake - one more time
From: Paul Fultz II (pfultz2_at_[hidden])
Date: 2016-04-22 20:36:12

> On Apr 22, 2016, at 5:41 PM, Robert Ramey <ramey_at_[hidden]> wrote:
> 
> On 4/22/16 2:56 PM, Raffi Enficiaud wrote:
>> Certainly, CMake can do everything with the appropriate effort. But so
>> far, although I am a CMake user, I do not know how to do this:
>> 
>> - having the same target name with different target properties: like
>>  set(PROJECT_SRC ....)
>>  add_library(myproject SHARED ${PROJECT_SRC})
>>  add_library(myproject STATIC ${PROJECT_SRC})
>> 
>>  how do you do that? how do you refer to the appropriate variant?
> 
> I know it's beside the point of your post, but I can't resist.
> 
> I do this in the following way.
> 
> a) I set up a cached boolean variable  USE_STATIC
> b) I use the CMake script
> 
> if(USE_STATIC)
>  add_library(myproject STATIC ${PROJECT_SRC})
> else()
>  add_library(myproject SHARED ${PROJECT_SRC})
> elseif()

This is not necessary at all. Cmake provides the `BUILD_SHARED_LIBS` variable that can be set to do this same purpose:

https://cmake.org/cmake/help/v3.5/variable/BUILD_SHARED_LIBS.html

> 
> Then I generate two different versions and can
> switch back and forth between them.
> 
> You see this in the serialization library CMake files
> 
> Robert Ramey
> 
> 
> 
> 
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