[CMake] How about GNU Automatic Variables

[Zhang Xianyi]

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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