[CMake] Install destination problem

[Michael Ellery]

This might be helpful:

http://stackoverflow.com/questions/39481958/setting-cmake-install-prefix-from-cmakelists-txt-file/39485990#39485990

Also, FWIW, the generated makefile (if you are using the makefile generator) supports DESTDIR which will get prepended to the CMAKE_INSTALL_PREFIX path (which sounds like it is not useful in your case).

-Mike

> On Dec 28, 2016, at 8:52 AM, Chris Johnson <cxjohnson at gmail.com> wrote:
> 
> I've found experimentally that if the install directory exists, it works correctly.  If it does not exist, the prefix somehow gets changed to /usr/local.  I've not found where that's getting set yet.
> 
> Thanks for the recommendation on CACHE.
> 
> On Wed, Dec 28, 2016 at 9:46 AM, Kris Thielemans <kris.f.thielemans at gmail.com> wrote:
> Hi
> 
>  
> 
> My guess is that you have a local variable CMAKE_INSTALL_PREFIX being shadowed by the global variable. Best to add the CACHE keyword etc in your set statement, then there’ll be only 1 variable.
> 
>  
> 
> Kris
> 
>  
> 
> From: CMake [mailto:cmake-bounces at cmake.org] On Behalf Of Chris Johnson
> Sent: 27 December 2016 23:27
> To: cmake at cmake.org
> Subject: [CMake] Install destination problem
> 
>  
> 
> In all of my CMakeLists.txt files, I include a settings file, like so:
> 
>  
> 
> include(global_settings.cmake)
> 
>  
> 
> Inside global_settings.cmake, I have a line like this:
> 
>  
> 
> set( CMAKE_INSTALL_PREFIX ${CMAKE_BINARY_DIR}/install )
> 
>  
> 
> When I run "make install" on my development system, the files are correctly installed where I expect to find them, in a subdirectory of my build directory named "install".
> 
>  
> 
> But when I tried to do the same on our production server just now, it tried to install the binaries into /usr/local/bin.
> 
>  
> 
> It's as if $CMAKE_INSTALL_PREFIX did not get set.
> 
>  
> 
> What am I doing wrong?
> 
> 
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