MantisBT - CMake
/tmp/sourcedir
/tmp/sourcedir/_build -> /tmp/build
/tmp/build
And you call cmake /tmp/sourcedir from /tmp/sourcedir/_build the paths in the generated Makefile are wrong. See the steps to reproduce for more details.
I will try to add a test and a patch that fix it as soon as I have time.
$ mkdir helloworld
$ cd helloworld
$ cat > CMakeLists.txt <<EOF
cmake_minimum_required(VERSION 2.8)
project(helloworld)
add_executable(helloworld
src/main.cc
)
EOF
$ mkdir src
$ cat > src/main.cc <<EOF
#include <iostream>
int main(void)
{
std::cout << "Hello world\n" << std::endl;
return 0;
}
EOF
$ mkdir /tmp/build
$ ln -s /tmp/build _build
$ cd _build
$ cmake ..
CMake Error: The source directory "/tmp" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
$ cmake /tmp/helloworld
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/helloworld/_build
$ make
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/helloworld/_build
Scanning dependencies of target helloworld
make[2]: *** No rule to make target `../src/main.cc', needed by `CMakeFiles/helloworld.dir/src/main.cc.o'. Stop.
make[1]: *** [CMakeFiles/helloworld.dir/all] Error 2
make: *** [all] Error 2
I have attached the CMakeCache.txt
$ rm -rf /tmp/helloworld/_build /tmp/build
$ mkdir /tmp/build
$ cd /tmp/build
$ cmake /tmp/helloworld
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/build
$ make
Scanning dependencies of target helloworld
[100%] Building CXX object CMakeFiles/helloworld.dir/src/main.cc.o
Linking CXX executable helloworld
[100%] Built target helloworld
CMakeCache.txt (10,456) 2011-03-08 11:45https://public.kitware.com/Bug/file/3742/CMakeCache.txt