I'm trying to get started porting lwIP to an RTOS. Having never worked
with lwip before, I thought I would first just build 2_1_3_RC1 for
Linux. I'm following the directions in BUILDING:
Working example
===============
Working build examples can be found in the
contrib/ports/{win32, unix}/example_app
subdirectory.
To use them, create a build directory and call cmake with
the lwIP root dir:
- mkdir build
- cd build
- cmake ..
- cmake --build .
The CMakeLists.txt will autoselect the correct port
for your system (supported: Linux, Windows, Darwin).
The first problem is that I don't have doxygen installed (and don't
really have any desire to install it):
$ mkdir build
$ cd build
$ cmake ..
-- The C compiler identification is GNU 10.3.0
-- The CXX compiler identification is GNU 10.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
Doxygen needs to be installed to generate the doxygen documentation
-- Configuring done
CMake Error at CMakeLists.txt:20 (add_dependencies):
The dependency target "lwipdocs" of target "dist" does not exist.
-- Generating done
CMake Generate step failed. Build files cannot be regenerated correctly.
I tried commenting out the lwipdocs target in CMakeLists.txt, and that
allowed the 'cmake ..' command to finish, but the subsequent 'cmake --build .'
command then does nothing:
$ rm -rf build
$ mkdir build
$ cd build
$ cmake ..
-- The C compiler identification is GNU 10.3.0
-- The CXX compiler identification is GNU 10.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
Doxygen needs to be installed to generate the doxygen documentation
-- Configuring done
-- Generating done
-- Build files have been written to:
/home/grante/lwip/lwip-STABLE-2_1_3_RC1/build
$ tree . > /tmp/before.tree
$ cmake --build .
$ tree . > /tmp/after.tree
$ diff /tmp/{before,after}.tree
I'm obviously missing something, but what?
--
Grant
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