[CMake] Main program not getting rebuilt when library changes.

[Bill Hoffman]

Bill,

I want to reset this conversation a bit.  What you are doing should work 
no problem.  Most of the suggestions should not be needed.  I do agree 
that glob is bad, but it will cause different problems.   Anyway, I 
created the following example based on your posts and it works with VS 
2010.   Can you try this and report back?  This could be a bug in VS as 
CMake has very little to do with depends like this and the VS IDE.

I did this to test:
$ ls -l b/cmTestMain/Debug/
total 684
-rwxr-xr-x 1 hoffman Domain Users  28160 Oct  6 10:47 cmTestMain.exe

hoffman at quasar ~/Work/dep
$ touch cmTestLib/MySub.cpp

#build from VS IDE and exe relinks
hoffman at quasar ~/Work/dep
$ ls -l b/cmTestMain/Debug/
total 684
-rwxr-xr-x 1 hoffman Domain Users  28160 Oct  6 10:48 cmTestMain.exe


hoffman at quasar ~/Work/dep
$ touch cmTestLib/MySub.h

# build from VS IDE exe relinks again
hoffman at quasar ~/Work/dep
$ ls -l b/cmTestMain/Debug
total 684
-rwxr-xr-x 1 hoffman Domain Users  28160 Oct  6 10:49 cmTestMain.exe




top level:
-----------
cmake_minimum_required (VERSION 2.8)
project(cmTest)
add_subdirectory (cmTestLib)
add_subdirectory (cmTestMain)

cmTestLib
--------------
add_library (cmTestLib STATIC MySub.cpp MySub.h)

------ cmTestLib/MySub.cpp
#include "MySub.h"

int hello()  { return 0;}

----- cmTestLib/MySub.h
int hello();

cmTestMain
----------------
include_directories (${cmTest_SOURCE_DIR}/cmTestLib)
add_executable (cmTestMain cmTestMain.cpp)
target_link_libraries (cmTestMain cmTestLib)


Here are the source files:

------ cmTestLib/MySub.cpp
#include "MySub.h"

int hello()  { return 0;}

----- cmTestLib/MySub.h
int hello();

cmTestMain/cmTestMain.cpp

#include "MySub.h"

int main()
{
   return hello();
}