Re: [CMake] shared library with CMake in kdevelop4

2012-01-16 Thread David Cole 
On Mon, Jan 16, 2012 at 8:38 AM,  paspa...@noos.fr wrote:

 I am new with kdevelop and cmake so apologize for this pretty naive
 question, I create in kdevelop a proj3 project and want to link a library so
 I create a second project projA within the proj3 directory

 the projA CMakelist is

 project(proja)
 set( lib_SOURCES Execute_Msg.cpp )
 add_library(proja ${lib_SOURCES} )

 the proj3 CMakelist is

 cmake_minimum_required(VERSION 2.8)
 project(proj3)
 link_directories(/pascal/pKD3/proj3/projA/build)
 add_executable(proj3 main.cpp)
 target_link_libraries(proj3 libproja)

 there is a libproja file in the /pascal/pKD3/proj3/projA/build directory, so
 I don't understand why I get the message /usr/bin/ld: cannot find -llibproja

 thanks for help


The second arg to target_link_libraries should be a CMake target name
or the full path to a library file. In this case, it should be:

  target_link_libraries(proj3 proja)

since proja is a CMake target name. If it were a full path to a
library file, it might be something like:

  target_link_libraries(proj3 /path/to/libproja.a)


HTH,
David
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Re: [CMake] shared library with CMake in kdevelop4

2012-01-16 Thread David Cole 
On Mon, Jan 16, 2012 at 9:34 AM, David Cole david.c...@kitware.com wrote:
 On Mon, Jan 16, 2012 at 8:38 AM,  paspa...@noos.fr wrote:

 I am new with kdevelop and cmake so apologize for this pretty naive
 question, I create in kdevelop a proj3 project and want to link a library so
 I create a second project projA within the proj3 directory

 the projA CMakelist is

 project(proja)
 set( lib_SOURCES Execute_Msg.cpp )
 add_library(proja ${lib_SOURCES} )

 the proj3 CMakelist is

 cmake_minimum_required(VERSION 2.8)
 project(proj3)
 link_directories(/pascal/pKD3/proj3/projA/build)
 add_executable(proj3 main.cpp)
 target_link_libraries(proj3 libproja)

 there is a libproja file in the /pascal/pKD3/proj3/projA/build directory, so
 I don't understand why I get the message /usr/bin/ld: cannot find -llibproja

 thanks for help


 The second arg to target_link_libraries should be a CMake target name
 or the full path to a library file. In this case, it should be:

  target_link_libraries(proj3 proja)

 since proja is a CMake target name. If it were a full path to a
 library file, it might be something like:

  target_link_libraries(proj3 /path/to/libproja.a)


 HTH,
 David


And the call to link_directories is unnecessary. In either case.
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Re: [CMake] shared library with CMake in kdevelop4

2012-01-16 Thread Michael Hertling 
On 01/16/2012 02:38 PM, paspa...@noos.fr wrote:
 
 I am new with kdevelop and cmake so apologize for this pretty naive question, 
 I 
 create in kdevelop a proj3 project and want to link a library so I create a 
 second project projA within the proj3 directory
 
 the projA CMakelist is
 
 project(proja)
 set( lib_SOURCES Execute_Msg.cpp )
 add_library(proja ${lib_SOURCES} )

If you want to get a shared library, you should state this explicitly:

ADD_LIBRARY(proja SHARED ${lib_SOURCES} )

Also see the BUILD_SHARED_LIBS variable.

 the proj3 CMakelist is
 
 cmake_minimum_required(VERSION 2.8)
 project(proj3)
 link_directories(/pascal/pKD3/proj3/projA/build)

Never use LINK_DIRECTORIES(), it's unnecessary and dangerous. Instead,
you need ADD_SUBDIRECTORIES(projA) here to make projA known to proj3.

 add_executable(proj3 main.cpp)
 target_link_libraries(proj3 libproja)

In TARGET_LINK_LIBRARIES(), refer to targets to link against
by their *target names*, not by their *file names*, i.e.:

TARGET_LINK_LIBRARIES(proj3 proja)

 there is a libproja file in the /pascal/pKD3/proj3/projA/build directory, so 
 I 
 don't understand why I get the message /usr/bin/ld: cannot find -llibproja

This is because ld searches a quite restricted set of directories for
libraries specifed by -l; particularly, it doesn't search the current
directory. If you specify targets by their target names, CMake uses
full paths in the linker command lines, so there will be no issue.

 thanks for help

Regards,

Michael
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Re: [CMake] shared library with CMake in kdevelop4

2012-01-16 Thread Michael Hertling 
On 01/16/2012 04:23 PM, paspa...@noos.fr wrote:
 Thank you michael
 
 in fact at the beginning I wanted just to do a static local library
 
 (I am totally new with cmake, before I didn't use that kind of tools with VS 
 and
 recently netbeans)
 
 finally according to your suggestions I wrote:
 
 projA
 project(proja)
 add_library(proja Execute_Msg.cpp)

If you definitely want a static library: ADD_LIBRARY(proja STATIC ...)
Without the explicit SHARED/STATIC keyword, the type of the resulting
library is determined by the BUILD_SHARED_LIBS variable which can be
controlled by the user; this might possibly be undesired.

 proj3
 cmake_minimum_required(VERSION 2.8)
 project(proj3)
 add_subdirectory(projA)
 add_executable(proj3 main.cpp)
 target_link_libraries(proj3 proja)
 
 and it works
 thanks again
 pascal

Regards,

Michael

PS: Please don't drop the ML.

  Message d'origine 
  De : Michael Hertling mhertl...@online.de
  À : cmake@cmake.org
  Objet : Re: [CMake] shared library with CMake in kdevelop4
  Date : 16/01/2012 15:39:29 CET
  
  On 01/16/2012 02:38 PM, paspa...@noos.fr wrote:
   
I am new with kdevelop and cmake so apologize for this pretty naive
   question, I
create in kdevelop a proj3 project and want to link a library so I create
   a
second project projA within the proj3 directory
   
the projA CMakelist is
   
project(proja)
set( lib_SOURCES Execute_Msg.cpp )
add_library(proja ${lib_SOURCES} )
  
   If you want to get a shared library, you should state this explicitly:
  
   ADD_LIBRARY(proja SHARED ${lib_SOURCES} )
  
   Also see the BUILD_SHARED_LIBS variable.
  
the proj3 CMakelist is
   
cmake_minimum_required(VERSION 2.8)
project(proj3)
link_directories(/pascal/pKD3/proj3/projA/build)
  
   Never use LINK_DIRECTORIES(), it's unnecessary and dangerous. Instead,
   you need ADD_SUBDIRECTORIES(projA) here to make projA known to proj3.
  
add_executable(proj3 main.cpp)
target_link_libraries(proj3 libproja)
  
   In TARGET_LINK_LIBRARIES(), refer to targets to link against
   by their *target names*, not by their *file names*, i.e.:
  
   TARGET_LINK_LIBRARIES(proj3 proja)
  
there is a libproja file in the /pascal/pKD3/proj3/projA/build directory,
   so I
don't understand why I get the message /usr/bin/ld: cannot find
   -llibproja
  
   This is because ld searches a quite restricted set of directories for
   libraries specifed by -l; particularly, it doesn't search the current
   directory. If you specify targets by their target names, CMake uses
   full paths in the linker command lines, so there will be no issue.
  
thanks for help
  
   Regards,
  
   Michael
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