[CMake] NMake Makefiles, 2.4.4 and target link libraries

[Patrick J. Franz -- ML]

Bill Hoffman wrote:
> Can you create a working example of this that shows the problem? I have 
> tried a few things, but am unable to see the problem.

Below is a working example on my machine -- hopefully you will see the 
same results as me:

 > Microsoft (R) Program Maintenance Utility   Version 6.00.9782.0
 > Copyright (C) Microsoft Corp 1988-1998. All rights reserved.
 >
 > -- Configuring done
 > -- Generating done
 > -- Build files have been written to: f:/XIA Software/cmake_bug_test
 > Scanning dependencies of target my_library_dep
 > [ 50%] Building C object 
CMakeFiles/my_library_dep.dir/src/my_library_dep.obj
 > my_library_dep.c
 > Linking C shared library lib\my_library_dep.dll
 >    Creating library lib\my_library_dep.lib and object 
lib\my_library_dep.exp
 > [ 50%] Built target my_library_dep
 > Linking C shared library lib\my_library.dll
 > LINK : fatal error LNK1104: cannot open file "lib/my_library_dep.dll.lib"
 > NMAKE : fatal error U1077: 'link' : return code '0x450'
 > Stop.
 > NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual 
Studio\VC98\bin\NMAKE.EXE"' : return code '0x2'
 > Stop.
 > NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual 
Studio\VC98\bin\nmake.exe"' : return code '0x2'
 > Stop.

I generated my Makefile running `cmake -G "NMake Makefiles" .` followed 
by `nmake`. The compiler is VS6.

Directory structure:

my_project/CMakeLists.txt
my_project/cmake/my_library_dep.cmake
my_project/cmake/my_library.cmake
my_project/src/my_library_dep.h
my_project/src/my_library_dep.c
my_project/src/my_library.c
my_project/t_api
my_project/lib

my_project/CMakeLists.txt
-------------------------

project(my_project C)

set(LIBRARY_OUTPUT_PATH lib)

include_directories(src)
link_directories(lib)

include(cmake/my_library_dep.cmake)
include(cmake/my_library.cmake)


my_project/cmake/my_library_dep.cmake
-------------------------------------

add_library(my_library_dep SHARED src/my_library_dep.c)

set(my_library_dep_lib_name
${CMAKE_SHARED_LIBRARY_PREFIX}my_library_dep${CMAKE_SHARED_LIBRARY_SUFFIX})
add_custom_command(TARGET my_library_dep POST_BUILD
   COMMAND cmake -E copy
   ARGS lib/${my_library_dep_lib_name} t_api/${my_library_dep_lib_name})


my_project/cmake/my_library.cmake
---------------------------------

add_library(my_library SHARED src/my_library.c)
target_link_libraries(my_library my_library_dep)

set(my_library_lib_name
${CMAKE_SHARED_LIBRARY_PREFIX}my_library${CMAKE_SHARED_LIBRARY_SUFFIX})
add_custom_command(TARGET my_library POST_BUILD
   COMMAND cmake -E copy
   ARGS lib/${my_library_lib_name} t_api/${my_library_lib_name})


my_project/src/my_library_dep.h
-------------------------------

__declspec(dllimport) void func(int arg);


my_project/src/my_library_dep.c
-------------------------------

__declspec(dllexport) void func(int arg);


__declspec(dllexport) void func(int arg)
{
   arg = 23;
}


my_project/src/my_library.c
---------------------------

#include "my_library_dep.h"

__declspec(dllexport) void other_func(int arg);


__declspec(dllexport) void other_func(int arg)
{
   func(arg);
}


Best Regards,
Patrick