[CMake] Unknown argument in FOREACH

[Cedric Doucet]

Hi Petr, 

thank you very much! 

I checked the documentation and for examples on the internet. 
However, I did not noticed the details. 
I may be blind because I am familiar with range-based loops like in C++ or Python. 
I will try to look the documentation more carefully the next time. 

Of course, after some tests, your solution works fine! :) 

Cédric 

----- Mail original -----

> De: "Petr Kmoch" <petr.kmoch at gmail.com>
> À: "Cedric Doucet" <cedric.doucet at inria.fr>
> Cc: cmake at cmake.org
> Envoyé: Lundi 18 Mai 2015 18:16:16
> Objet: Re: [CMake] Unknown argument in FOREACH

> Hi Cedric.

> If you check the documentation of foreach() (
> http://www.cmake.org/cmake/help/v3.2/command/foreach.html ), you will see
> there is no "IN item item..." syntax. Either LISTS or ITEMS has to follow
> after IN, or IN must be omitted altogether. So either do this:

> foreach(LIBRARY IN LISTS LIBRARIES_TO_DOWNLOAD)

> or this:

> foreach(LIBRARY ${LIBRARIES_TO_DOWNLOAD})

> I always prefer the former, because the latter will fail if the first item in
> the list happens to be "IN".

> Petr

> On Mon, May 18, 2015 at 6:05 PM, Cedric Doucet < cedric.doucet at inria.fr >
> wrote:

> > Hello,
> 

> > I try to write a loop to donwload and install libraries whose name is
> > contained in a list.
> 
> > I wrote these lines from the 45th line of my CMakeLists.txt file:
> 

> > ===========================================================
> 
> > set(LIBRARIES_TO_DOWNLOAD EIGEN)
> 

> > foreach(LIBRARY IN ${LIBRARIES_TO_DOWNLOAD})
> 
> > string(TOLOWER ${LIBRARY} LIBRARY_NAME)
> 
> > ExternalProject_Add(${LIBRARY_NAME}
> 
> > PREFIX ${LIBRARY_PREFIX}
> 
> > DOWNLOAD_DIR ${${LIBRARY}_DOWNLOAD_DIR}
> 
> > SOURCE_DIR ${${LIBRARY}_SOURCE_DIR}
> 
> > BINARY_DIR ${${LIBRARY}_BINARY_DIR}
> 
> > STAMP_DIR ${${LIBRARY}_STAMP_DIR}
> 
> > INSTALL_DIR ${${LIBRARY}_INSTALL_DIR}
> 
> > URL ${${LIBRARY}_URL}
> 
> > URL_MD5 ${${LIBRARY}_URL_MD5}
> 
> > CMAKE_ARGS ${${LIBRARY}_ARGS}
> 
> > LOG_DOWNLOAD 1
> 
> > LOG_UPDATE 1
> 
> > LOG_CONFIGURE 1
> 
> > LOG_BUILD 1
> 
> > LOG_TEST 1
> 
> > LOG_INSTALL 1
> 
> > )
> 
> > endforeach(LIBRARY)
> 
> > ===========================================================
> 

> > However, I get the following error message:
> 

> > =========================================================================================
> 
> > CMake Error at CMakeLists.txt:45 (foreach):
> 
> > Unknown argument:
> 
> > EIGEN
> 

> > CMake Error at CMakeLists.txt:46 (string):
> 
> > string no output variable specified
> 

> > CMake Error at
> > /usr/local/bibliotheques/cmake/3.2.2/share/cmake-3.2/Modules/ExternalProject.cmake:1850
> > (message):
> 
> > error: no download info for 'PREFIX' -- please specify existing/non-empty
> 
> > SOURCE_DIR or one of URL, CVS_REPOSITORY and CVS_MODULE, SVN_REPOSITORY,
> 
> > GIT_REPOSITORY, HG_REPOSITORY or DOWNLOAD_COMMAND
> 
> > Call Stack (most recent call first):
> 
> > /usr/local/bibliotheques/cmake/3.2.2/share/cmake-3.2/Modules/ExternalProject.cmake:2321
> > (_ep_add_download_command)
> 
> > CMakeLists.txt:47 (ExternalProject_Add)
> 

> > CMake Error at CMakeLists.txt:64 (endforeach):
> 
> > endforeach An ENDFOREACH command was found outside of a proper FOREACH
> 
> > ENDFOREACH structure. Or its arguments did not match the opening FOREACH
> 
> > command.
> 
> > =========================================================================================
> 

> > Do you know where the problem come from?
> 

> > Cheers,
> 

> > Cédric
> 

> > --
> 

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