Hi,
On 5 Jun 2009, at 15:52, Prasad H. L. wrote:
I tried as you have suggested. I have one more problem. I tried the
following CMakeLists.txt
--------
project(cmake_test)
cmake_minimum_required(VERSION 2.6)
add_executable(testcmake testcmake.m4.cpp)
add_custom_command(OUTPUT testcmake.m4.cpp
m4 -P -s testcmake.cpp >
testcmake.m4.cpp
VERBATIM)
set_source_files_properties(testcmake.m4.cpp PROPERTIES GENERATED true
SYMBOLIC true)
------------------
In the above testcmake.cpp is the actual file and I wish to create
the processed file as testcmake.m4.cpp. But, I get the following error
when I run cmake
-------------------------
CMake Error at CMakeLists.txt:6 (add_custom_command):
add_custom_command called with OUTPUT containing a ">". This
character is
not allowed.
-- Configuring incomplete, errors occurred!
-------------------------
'm4' outputs only on stdout and does not have an option to specify the
output file. Please
suggest me a solution for this...
You haven't quite used add_custom_command correctly. You have missed
out the COMMAND and ARGS parts for a start. Try:
add_custom_command(
OUTPUT testcmake.m4.cpp
COMMAND m4
ARGS -P -s testcmake.cpp > testcmake.m4.cpp
VERBATIM
)
Also, if I wish to do this for all CPP files, how do I specify it?
You could put all the files to be processed in a list and then do the
above in a foreach() block.
Cheers,
Rob
2009/6/5 Denis Scherbakov <[email protected]>:
I wanted to do some looping in macros which are not
possible in GNU
CPP. So, I wrote
macros in m4. I wish to pre-process all my C/C++ code with
m4 before
handing it over to
gcc. I did not find any direct way out for doing this in
cmake. Any
ideas how to do it with
cmake?
Use ADD_CUSTOM_COMMAND to call m4 preprocessor and OUTPUT file.cpp
Then use SET_SOURCE_FILES_PROPERTIES set GENERATED TRUE
and then include file.cpp into a list of sources for compilation.
Denis
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--
Robert Haines
Research Associate, RealityGrid Tel. : +44 (0)161 275 6067
Research Computing Services Fax. : +44 (0)161 275 0637
University of Manchester Email: [email protected]
Oxford Road Web : www.realitygrid.org
Manchester, M13 9PL : www.rcs.manchester.ac.uk
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