[CMake] How to integrate autoconf based library into my cmake build tree

[Michael Wild]

On 1. Mar, 2010, at 4:10 , Albert Z wrote:

> I just found that unless I explicitly include ExternalProject.cmak in my
> cmake build, cmake won't find command "ExternalProject_Add", which is pretty
> weird for me.
> include(/usr/local/share/cmake-2.8/Modules/ExternalProject.cmake)

Again:

include(ExternalProject)

will do... But then, the man-pages would tell you that.

> And now the problem is that if I use the following cmake script to build apr
> 
>   ExternalProject_Add(${LIB_NAME}
>     PREFIX /home/xxx/prj/trunk/external/apr/1.3.9
>     SOURCE_DIR /home/xxx/prj/trunk/external/apr/1.3.9
>     CONFIGURE_COMMAND /home/xxx/prj/trunk/external/apr/1.3.9/configure
> --enable-static --disable-shared --disable-ipv6
>     BINARY_DIR "/home/xxx/prj/trunk/external/apr/1.3.9/.libs/"
>     BUILD_COMMAND make all
>   )
> 

You most probably don't want to use hard-coded paths, but something relative to either CMAKE_SOURCE_DIR or CMAKE_BINARY_DIR.


> CMake complains
> 
>  error: no download info for 'apr' -- please specify existing SOURCE_DIR or
>  one of URL, CVS_REPOSITORY and CVS_MODULE, SVN_REPOSITORY or
>  DOWNLOAD_COMMAND
> 
> I have already specified the SOURCE_DIR, and I do not want the library is
> downloaded online. Is it a bug of CMake? Or I have done something wrong?

Does SOURCE_DIR exist and contain the apr sources?

If I was you, I'd prefer to specify a URL to a tar-ball on the local system (e.g. ${CMAKE_SOURCE_DIR}/external/apr-1.3.9.tgz), point SOURCE_DIR to ${CMAKE_BINARY_DIR}/external/apr and then let CMake to the rest.

Also, I might be wrong, but are you building in-source? If so, please don't and read http://www.cmake.org/Wiki/CMake_FAQ#Out-of-source_build_trees.

Michael

> 
> On Sun, Feb 28, 2010 at 5:45 PM, Albert Z <amzproject at gmail.com> wrote:
> 
>> Thanks, Luigi. However, I read the CMake 2.8 doc and tried to use function
>> "ExternalProject_Add". When I ran cmake in the root of my project, I got the
>> following error
>> 
>> Unknown CMake command "ExternalProject_Add"
>> 
>> I tried on both linux and mac and got the same error. And I am sure the
>> version of the cmake is 2.8
>> 
>> Best,
>> Meng
>> 
>> 
>> On Sun, Feb 28, 2010 at 4:50 AM, Luigi Calori <l.calori at cineca.it> wrote:
>> 
>>> Albert Z wrote:
>>> 
>>>> Hello,
>>>> Our project now uses a bunch of 3rd party libraries such as apr,
>>>> protobuf, libcurl, etc. Almost all of these libraries use autoconf (
>>>> configure.in <http://configure.in>) based build system. Since we have
>>>> some modifications to most of the libraries, we have to integrate these
>>>> libraries to our cmake build tree. What is the easiest way to integrate such
>>>> a 3rd-party library to a cmake build with keeping the maximum portability?
>>>> 
>>> Try to look at ExternalProject module
>>> http://www.cmake.org/cmake/help/cmake-2-8-docs.html#module:ExternalProject
>>> and page 10 of
>>> http://www.kitware.com/products/archive/kitware_quarterly1009.pdf
>>> 
>>> I have used it (with some mods): it allow to automate download
>>> pactch,build and install)
>>> Anyway, curl have recently included a CMakeLists in its distribution. I
>>> have used it even if had to apply some patches.
>>> I am trying to collect some cmake build recipes for some libraries I need.
>>> If you are interested, grab the stuff at
>>> bzr branch http://3d.cineca.it/storage/bazaar_repo/CmakeDeps/lib
>>> 
>>> HTH
>>> 
>>> Luigi
>>> 
>>> ------------------------------------------------------------------------
>>>> 
>>>> 
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>> 
>> 
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