[CMake] Separate compile flags for ASM/C compilers and lists

[Nikolay]

On 14 September 2013 09:59, Alexander Neundorf <a.neundorf-work at gmx.net>wrote:

> On Friday 13 September 2013, lorddoskias wrote:
> > Hello list,
> >
> > I have a couple of questions whose answers I couldn't find. So first
> > thing's first - I have the following function which I intend to use to
> > add a number of library targets:
> >
> > function(build_mps_m3_lib LIBRARY_NAME C_SOURCE ASM_SOURCE CPU_TYPE)
> >      set_property(SOURCE ${${C_SOURCE}} PROPERTY COMPILE_FLAGS "-g
> > --cpu=${CPU_TYPE} -O0")
> >      set_property(SOURCE ${${ASM_SOURCE}} PROPERTY COMPILE_FLAGS "-g
> > --cpu=${CPU_TYPE} --apcs=interwork")
> >      add_library(${LIBRARY_NAME}  ${${SOURCE}} ${${ASM_SOURCE}})
> >      set(TARGET_DIR "mps-m3")
> >      set(ASM_COMPILE_FLAGS "-g --cpu=${CPU_TYPE} --apcs=interwork")
> >      #custom armasm command line
> >      set(CMAKE_ASM_COMPILE_OBJECT "<CMAKE_ASM_COMPILER>
> > ${ASM_COMPILE_FLAGS} <SOURCE> -o <OBJECT>")
> >      #set_target_properties(${LIBRARY_NAME} PROPERTIES C_COMPILE_FLAGS
> > "-g --cpu=${CPU_TYPE} -O0")
> > endfunction(build_mps_m3_lib)
> >
> >
> > What I want to achieve is to have clear separation between the ASM
> > compiler flags and the C compiler flags. Since I'm not using the GNU
> > (ergo GCC) toolchain I cannot simply set the properties on the resulting
> > library target to set the COMPILE_FLAGS. Essentially what I want to
> > achieve is being able to set arbitrary compile options for the C and ASM
> > compiler WITHOUT both of those interfering.
>
> In general they don't interfer.
> What compiler and assembler are you using ?
> Maybe you need a new "assembler dialect". Those are quite simply to do, you
> can have a look e.g. at the files containing "MASM" in their name in
> Modules/.
>

Unfortunately I do not find the statement "In generla they don't interfere
to be correct". Here is what I'm talking about:

The default definitions of ASM_COMPILE_OBJECT is : ASM_COMPILE_OBJECTP:
<CMAKE_ASM_COMPILER> <DEFINES> <FLAGS> -o <OBJECT> -c <SOURCE>

meaning it will include all defines/flags set by
add_definition/set_target_properties for COMPILE_DEFINITIONS or
COMPILER_FLAGS. Unfortunately if I have something like the following:
add_library(tx-mps-m4 ${KERNEL_SOURCE})
set_target_properties(tx-mps-m4 PROPERTIES COMPILE_FLAGS "-g
--cpu=cortex-m4 -O0")

I get the exact same flags (-g --cpu and -O0) passed to the assmebler
(armasm) in my case. And the assembler doesn't understand the -O0 and it
exists. How can I avoid this situation?


>
> > My second questions: The way I pass the lists of sources is kind of ugly
> > - e.g. I'm, in-essence, doing double indirection the ${${blah}} thingy.
> > What would be the correct way. I tried with ${blah-list} but this skewed
> > the arguments order
>
> To get full support for keywords etc. in your own macros/functions, have a
> look at CMakeParseArguments.cmake.
>
> Alex
> --
>
> Powered by www.kitware.com
>
> Please keep messages on-topic and check the CMake FAQ at:
> http://www.cmake.org/Wiki/CMake_FAQ
>
> Kitware offers various services to support the CMake community. For more
> information on each offering, please visit:
>
> CMake Support: http://cmake.org/cmake/help/support.html
> CMake Consulting: http://cmake.org/cmake/help/consulting.html
> CMake Training Courses: http://cmake.org/cmake/help/training.html
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Follow this link to subscribe/unsubscribe:
> http://www.cmake.org/mailman/listinfo/cmake
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.cmake.org/pipermail/cmake/attachments/20130916/65531aeb/attachment.htm>