[CMake] How about GNU Automatic Variables

[Domen Vrankar]

Hi,

I haven't tested this but I think you could write something like this:

add_library(test_single test.c)
set_property(
   TARGET test_single
   PROPERTY COMPILE_DEFINITIONS DOUBLE=some_val
)
add_library(test_double test.c)
set_property(
   TARGET test_double
   PROPERTY COMPILE_DEFINITIONS DOUBLE=some_other_val
)

and then link the static libraries to an executable.

As far as I know you could also use
set_target_properties(test_single PROPERTIES COMPILE_DEFINITIONS
DOUBLE=some_val)
but I'm not certain what the difference is... Probably back compatibility...

Hope this helps,
Domen



2014-11-29 9:27 GMT+01:00 Zhang Xianyi <traits.zhang at gmail.com>:
> Hi Decker,
>
> Thank you for the answer.
>
> If I want to debug test_double, the debugger will refer to
> ${CMAKE_BINARY_DIR}/test_double.c.
> I am not sure it is appropriate to debug a generated file.
>
>
> Xianyi
>
> 2014-11-28 23:03 GMT+08:00 J Decker <d3ck0r at gmail.com>:
>>
>>
>>
>> On Fri, Nov 28, 2014 at 1:29 AM, Zhang Xianyi <traits.zhang at gmail.com>
>> wrote:
>>>
>>> Hi,
>>>
>>> I want to use cmake for a library which supports different floating point
>>> precision.
>>>
>>> In Makefile, I used $(*F)  to generate the different function name.
>>>
>>> Could I use $(*F) in cmake?
>>>
>>>
>>> ==================
>>>
>>> test.c
>>>
>>> ===============
>>>
>>> #ifdef DOUBLE
>>>
>>> #define TYPE double
>>>
>>> #else
>>>
>>> #define TYPE float
>>>
>>> #endif
>>>
>>>
>>> void CNAME(TYPE * a)
>>>
>>> {
>>>
>>>   a[0]=1.0;
>>>
>>> }
>>>
>>>
>>
>> CMakeLists.txt
>> ====================
>>  cmake_minimum_required(VERSION 2.8)
>>
>>        add_custom_command( OUTPUT ${CMAKE_BINARY_DIR}/test_double.c
>>                            DEPENDS test.c
>>                            COMMAND ${CMAKE_COMMAND} -E copy_if_different
>> test.c   ${CMAKE_BINARY_DIR}/test_double.c
>>                            COMMAND ${CMAKE_COMMAND} -E touch
>> ${CMAKE_BINARY_DIR}/test_double.c
>>                            )
>>
>>
>> add_library( libtest   test.c  ${CMAKE_BINARY_DIR}/test_double.c )
>>
>> SET_PROPERTY(SOURCE ${CMAKE_BINARY_DIR}/test_double.c
>>                  APPEND
>> PROPERTY COMPILE_DEFINITIONS "DOUBLE" )
>>
>> ======================
>>
>>> ===========
>>>
>>> Makefile
>>>
>>> ================
>>>
>>> OBJS=test_single.o test_double.o
>>>
>>> all:$(OBJS)
>>>
>>>       ar -rua libtest.a $(OBJS)
>>>
>>> test_single.o : test.c
>>>
>>>         $(CC) -DCNAME=$(*F) -UDOUBLE -c $< -o $(@F)
>>>
>>> test_double.o : test.c
>>>
>>>         $(CC) -DCNAME=$(*F) -DDOUBLE -c $< -o $(@F)
>>>
>>>
>>> ============
>>>
>>> Thank you
>>>
>>> Xianyi
>>>
>>>
>>> --
>>>
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>>
>
>
> --
>
> Powered by www.kitware.com
>
> Please keep messages on-topic and check the CMake FAQ at:
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>
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