I would like to get multiple system installations of LDC working on Gentoo, by renaming binaries and paths. I've got that working for DMD, but I can't get my head around CMake. I thought I could just append the version (0.12.0) to the LDC_EXE_NAME, but that broke the build process with make -j3. And otherwise it seems to use the installed /usr/bin/ldc2 as a fallback in the build phase which should not happen at all.

So I'd appreciate if someone could help be out with this. I've never used CMake before.

-- 
Marco

On Thursday, 14 November 2013 at 09:51:11 UTC, Marco Leise wrote:
> I would like to get multiple system installations of LDC
> working on Gentoo, by renaming binaries and paths. I've got
> that working for DMD, but I can't get my head around CMake. I
> thought I could just append the version (0.12.0) to the
> LDC_EXE_NAME, but that broke the build process with make -j3.
> And otherwise it seems to use the installed /usr/bin/ldc2 as a
> fallback in the build phase which should not happen at all.
>
> So I'd appreciate if someone could help be out with this.
> I've never used CMake before.

Hi Marco,

you can change CMAKE_INSTALL_PREFIX. Everything is installed with this prefix. I think the default value is /usr/local.
Modules are installed by default to ${CMAKE_INSTALL_PREFIX}/include/d, but this can be overridden by setting INCLUDE_INSTALL_DIR.

E.g.
cmake -DCMAKE_INSTALL_PREFIX=/usr/ldc-0.12.0 -DINCLUDE_INSTALL_DIR=/usr/include/ldc/ldc-0.12.0 ../ldc

I hope this is helpful. Otherwise I have to have a deeper look at the cmake documentation.


Regards,
Kai

Am Thu, 14 Nov 2013 13:58:05 +0100
schrieb "Kai Nacke" <kai@redstar.de>:

> On Thursday, 14 November 2013 at 09:51:11 UTC, Marco Leise wrote:
> > I would like to get multiple system installations of LDC working on Gentoo, by renaming binaries and paths. I've got that working for DMD, but I can't get my head around CMake. I thought I could just append the version (0.12.0) to the LDC_EXE_NAME, but that broke the build process with make -j3. And otherwise it seems to use the installed /usr/bin/ldc2 as a fallback in the build phase which should not happen at all.
> >
> > So I'd appreciate if someone could help be out with this. I've never used CMake before.
> 
> Hi Marco,
> 
> you can change CMAKE_INSTALL_PREFIX. Everything is installed with
> this prefix. I think the default value is /usr/local.
> Modules are installed by default to
> ${CMAKE_INSTALL_PREFIX}/include/d, but this can be overridden by
> setting INCLUDE_INSTALL_DIR.
> 
> E.g.
> cmake -DCMAKE_INSTALL_PREFIX=/usr/ldc-0.12.0
> -DINCLUDE_INSTALL_DIR=/usr/include/ldc/ldc-0.12.0 ../ldc
> 
> I hope this is helpful. Otherwise I have to have a deeper look at the cmake documentation.
> 
> 
> Regards,
> Kai

Thank you Kai, that will do. I'll just use /opt/ldc2-0.12.0
for now. I was so focused on getting everything into
/usr/bin, /usr/lib and /etc that I missed the obvious solution!

-- 
Marco