[CMake] CMake and TI-cgt compiler problem

[mdick at testo.de]

Hello all together!

Currently I am trying to get the ti-cgt 5.2.5 compiler working with CMake.
Therefore, I use the blinky sample project from TivaWare. 

To keep it simple in a first try, I added all the original flags from the
code composer project into a toolchain file:
#include(CMakeForceCompiler)
set(CMAKE_SYSTEM_NAME Generic)

set(COMPILER_PATH "C:/git/saveris/toolchains/")	# TODO
set(TI_CGT_PATH "${COMPILER_PATH}/arm-ti-cgt-5.2.5")

# specify the cross compiler
SET(CMAKE_C_COMPILER   ${TI_CGT_PATH}/bin/armcl.exe)
SET(CMAKE_CXX_COMPILER ${CMAKE_C_COMPILER})
SET(CMAKE_ASM_COMPILER ${TI_CGT_PATH}/bin/armasm.exe)
#ENABLE_LANGUAGE(ASM)

# skip compiler tests
set(CMAKE_ASM_COMPILER_WORKS 1) 
set(CMAKE_C_COMPILER_WORKS   1) 
set(CMAKE_CXX_COMPILER_WORKS 1) 
set(CMAKE_DETERMINE_ASM_ABI_COMPILED 1) 
set(CMAKE_DETERMINE_C_ABI_COMPILED   1) 
set(CMAKE_DETERMINE_CXX_ABI_COMPILED 1) 

# Add the default include and lib directories for tool chain
include_directories(${TI_CGT_PATH}/include)
link_directories(${TI_CGT_PATH}lib)

# set target environment
set(CMAKE_FIND_ROOT_PATH ${TI_CGT_PATH})

set(PLATFORM_CONFIG_C_FLAGS "-mv7M4 --code_state=16
--float_support=FPv4SPD16 --abi=eabi -me -O2 -g
--include_path=C:/TI/ccsv6/tools/compiler/ti-cgt-arm_5.2.5/include
--include_path=C:/TI/TivaWare_C_Series-2.1.0.12573 --gcc --define=ccs=ccs
--define=PART_TM4C1294NCPDT --diag_warning=225 --display_error_number
--diag_wrap=off --gen_func_subsections=on --ual" CACHE STRING "platform
config c flags")

# combine flags to C and C++ flags
SET(CMAKE_C_FLAGS "${PLATFORM_CONFIG_C_FLAGS} ${CMAKE_C_FLAGS}" CACHE STRING
"platform config c flags")
SET(CMAKE_CXX_FLAGS "${PLATFORM_CONFIG_CXX_FLAGS} ${CMAKE_CXX_FLAGS}" CACHE
STRING "platform config c flags")

SET(CMAKE_EXE_LINKER_FLAGS "-mv7M4 --code_state=16 --float_support=FPv4SPD16
--abi=eabi -me -O2 -g --define=ccs=\"ccs\" --define=PART_TM4C1294NCPDT
--diag_warning=225 --display_error_number --diag_wrap=off
--gen_func_subsections=on --ual -z --stack_size=256 -mblinky_ccs.map
--heap_size=0 -iC:/TI/ccsv6/tools/compiler/ti-cgt-arm_5.2.5/lib
-iC:/TI/ccsv6/tools/compiler/ti-cgt-arm_5.2.5/include --reread_libs
--warn_sections --display_error_number --diag_wrap=off
--xml_link_info=blinky_linkInfo.xml --rom_model" CACHE STRING "platform
config linker exe files")

Then, when I run CMake and try to build it with make, I get this error:

<Linking>
>> WARNING: invalid linker option --code_state=16 (ignored)
>> WARNING: invalid linker option --float_support=FPv4SPD16 (ignored)
>> WARNING: the --abi=eabi option must be specified before the -z; option
>> ignored
warning: Case insensitivity of options has been deprecated; O must be
written
   as o in future releases
>> WARNING: invalid linker option --gen_func_subsections=on (ignored)
>> WARNING: invalid linker option --ual (ignored)
warning: Option -o is an alias of linker option --output_file. The specified
   argument of 2 is also a valid argument for the compiler option
--opt_level
   (-o). If the intent is to specify the optimization level, the option
should
   be specified before the --run_linker(-z) option. As specified, the output
   file of the linker will be 2
warning #10247-D: creating output section ".text" without a SECTIONS
   specification
warning #10247-D: creating output section ".data" without a SECTIONS
   specification
warning #10247-D: creating output section ".cinit" without a SECTIONS
   specification

 undefined        first referenced
  symbol              in file
 ---------        ----------------
 --define=ccs=ccs

error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "2" not built

>> Compilation failure
jom:
C:\git\saveris\build\none\debug\app/ethernet2cloud/CMakeFiles/ethernet2cloud.dir/build.make
[bin\ethernet2cloud] Error 1
jom: C:\git\saveris\build\none\debug\CMakeFiles/Makefile2
[app\ethernet2cloud\CMakeFiles\ethernet2cloud.dir\all] Error 2
jom: C:\git\saveris\build\none\debug\Makefile [all] Error 2


I found out, that in the build.make file, there are some additional flags
added to the call of the compiler. “mv7M4” should be the first flag. When I
remove the from CMake added flags in between “armcl.exe” and “mv7M4”, the
errors disappear:

cd C:/git/saveris/build/none/debug/app/ethernet2cloud &&
C:/git/saveris/toolchains/arm-ti-cgt-5.2.5/bin/armcl.exe --run_linker
--output_file=../../bin/ethernet2cloud
--map_file=../../bin/ethernet2cloud.map
--search_path=C:/git/saveris/toolchains/arm-ti-cgt-5.2.5lib -mv7M4
--code_state=16 --float_support=FPv4SPD16 --abi=eabi -me -O2 -g
--define=ccs="ccs" --define=PART_TM4C1294NCPDT --diag_warning=225
--display_error_number --diag_wrap=off --gen_func_subsections=on --ual -z
--stack_size=256 -mblinky_ccs.map --heap_size=0
-iC:/TI/ccsv6/tools/compiler/ti-cgt-arm_5.2.5/lib
-iC:/TI/ccsv6/tools/compiler/ti-cgt-arm_5.2.5/include --reread_libs
--warn_sections --display_error_number --diag_wrap=off
--xml_link_info=blinky_linkInfo.xml --rom_model $(ethernet2cloud_OBJECTS)
$(ethernet2cloud_EXTERNAL_OBJECTS)

As a comparison, the flags when I use gcc:
cd C:/git/saveris/build/none/debug/app/ethernet2cloud &&
C:/git/saveris/toolchains/arm-none-eabi-gcc-4.8/bin/arm-none-eabi-gcc.exe
-O0 -fprofile-arcs -ftest-coverage -g -gdwarf-2 -lgcov --coverage
$(ethernet2cloud_OBJECTS) $(ethernet2cloud_EXTERNAL_OBJECTS) -o
../../bin/ethernet2cloud


My question is now: What does CMake do exactly? The flags added to the
compiler are compiler specifiv (?). But where does CMake know from, what it
has to do? If it would know the TI compiler, then I would guess it should
add the correct flags.

Has anyone over done similar experiences?

Thank you all for you answers




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