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Am 07.11.19 um 18:01 schrieb samyuktar:<br>
<blockquote type="cite"
cite="mid:1573146101480-0.post@n2.nabble.com">
<pre class="moz-quote-pre" wrap="">SET(CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_COMPILER} ${CMAKE_C_FLAGS}
--c_file=../main.c -z --map_file=${TARGET_NAME}.map
--output_file=${TARGET_NAME} ${PLATFORM_CONFIG_L_FLAGS} ${CMD_SRCS} ${LIB}
--include_path ${LWIP_INCLUDE_DIR} --verbose <OBJECTS>" CACHE STRING
"linker executable")</pre>
</blockquote>
<p>As far as I can tell, you are trying to combine the compile and
link steps, but CMake expects these to be separate steps.
Furthermore, cmake knows about the TI compiler (see
<...>/share/cmake-3.xx/Modules/Compiler/TI-C.cmake and
friends), so you shouldn't need to mess around with
CMAKE_C_LINK_EXECUTABLE - let cmake handle that for you. The flags
you need for linking that cmake doesn't already add for you by
default should go into CMAKE_EXE_LINKER_FLAGS_<CONFIG>_INIT
(see the cmake documenation for details), or be set using the
add_link_options and/or target_link_options commands (again, see
the cmake documentation for details).</p>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">[ 50%] Building C object CMakeFiles/test.dir/main.c.o
/Applications/ti_ccs9/ccs9/ccs/tools/compiler/ti-cgt-arm_18.12.2.LTS/bin/armcl
-I/Applications/ti_ccs9/ccs9/ccs/tools/compiler/ti-cgt-arm_18.12.2.LTS/include
-isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -o
CMakeFiles/test.dir/main.c.o -c /Users/sramnath/lwip_blinky/lwip/main.c
</pre>
<blockquote type="cite">
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">WARNING: object file specified, but linking not enabled
</pre>
</blockquote>
</blockquote>
</blockquote>
<p>That compiler invocation looks wrong - I'm pretty sure the TI
compiler doesn't use the MacOS10.14.sdk sysroot. I think what's
happening here is that you set your toolchain settings
(CMAKE_C_COMPILER and friends) after the project() command - but
the project() command tells cmake to check what compiler you are
using to figure out how it must be called, and it is using your
host system's compiler (probably Apple's clang) to do so. You
should put the toolchain definitions into a toolchain file as
described in the cmake-toolchains(7) documentation and tell cmake
to use it my specifying -DCMAKE_TOOLCHAIN_FILE=<path to your
toolchain file> on the cmake command line.<br>
</p>
<p>I once played around a bit with cgtools 5.2.9 for Arm using the
following toolchain file:</p>
<p>--- SNIP ---<br>
</p>
<p><tt># TI cgt-arm_5.2.9 cmake toolchain script</tt><tt><br>
</tt><tt>#</tt><tt><br>
</tt><tt># This file is based on the cmake-toolchains(7)
documentation.</tt><tt><br>
</tt><tt><br>
</tt><tt># Set the operating system and processor architecture</tt><tt><br>
</tt><tt>set(CMAKE_SYSTEM_NAME Generic)</tt><tt><br>
</tt><tt>set(CMAKE_SYSTEM_PROCESSOR arm)</tt><tt><br>
</tt><tt>set(CMAKE_SYSTEM_VERSION 1)</tt><tt><br>
</tt><tt><br>
</tt><tt># Setup CMake's rules for using the CMAKE_FIND_ROOT_PATH
for cross-compilation</tt><tt><br>
</tt><tt>set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)</tt><tt><br>
</tt><tt>set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)</tt><tt><br>
</tt><tt>set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)</tt><tt><br>
</tt><tt>set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)</tt><tt><br>
</tt><tt><br>
</tt><tt># TI cgtools command line programs</tt><tt><br>
</tt><tt>set(SDK_PATH "/proj/he/opt/ti/ti-cgt-arm_5.2.9")</tt><tt><br>
</tt><tt>set(SDK_BIN "${SDK_PATH}/bin")</tt><tt><br>
</tt><tt><br>
</tt><tt># This compiler doesn't work with CMAKE_SYSROOT, but we
do need to set our</tt><tt><br>
</tt><tt># CMAKE_FIND_ROOT_PATH. Note that setting a variable will
override the value in</tt><tt><br>
</tt><tt># the cache if the CACHE option was not used, so if we
want to be able to use a</tt><tt><br>
</tt><tt># CMAKE_FIND_ROOT_PATH passed to cmake via the command
line, we must make sure</tt><tt><br>
</tt><tt># not to overwrite any value that was already set.</tt><tt><br>
</tt><tt>if(NOT CMAKE_FIND_ROOT_PATH)</tt><tt><br>
</tt><tt> set(CMAKE_FIND_ROOT_PATH ${SDK_PATH})</tt><tt><br>
</tt><tt>endif()</tt><tt><br>
</tt><tt><br>
</tt><tt>set(CMAKE_C_COMPILER "${SDK_BIN}/armcl")</tt><tt><br>
</tt><tt>set(CMAKE_CXX_COMPILER "${SDK_BIN}/armcl")</tt><tt><br>
</tt><tt>set(CMAKE_ASM_COMPILER "${SDK_BIN}/armasm")</tt><tt><br>
</tt><tt>set(CMAKE_AR "${SDK_BIN}/armar")</tt><tt><br>
</tt><tt>set(CMAKE_LINKER "${SDK_BIN}/armlnk")</tt><tt><br>
</tt><tt><br>
</tt><tt>string(CONCAT ARCH_C_FLAGS</tt><tt><br>
</tt><tt> "-mv=7A8 --abi=eabi -me --float_support=VFPv3 --neon
--printf_support=full")</tt><tt><br>
</tt><tt>set(CMAKE_C_FLAGS_INIT "${ARCH_C_FLAGS}")</tt><tt><br>
</tt><tt>set(CMAKE_CXX_FLAGS_INIT "${ARCH_C_FLAGS}")</tt><tt><br>
</tt></p>
<p><tt># Normally, cmake checks if the compiler can compile and link
programs. For</tt><tt><br>
</tt><tt># TI's cgtools the link step doesn't work, and there
seems to be no easy way</tt><tt><br>
</tt><tt># to fix this. Instead, we simply disable the compiler
checks for C and C++.</tt><tt><br>
</tt><tt>set(CMAKE_C_COMPILER_WORKS 1)</tt><tt><br>
</tt><tt>set(CMAKE_CXX_COMPILER_WORKS 1)</tt><br>
</p>
<p>--- SNIP ---<br>
</p>
<p>Note that the project this was intended for thankfully never got
anywhere so I didn't pursue this much further than being able to
compile libz with it ("thankfully" because the TI compiler is
pretty awful).<br>
</p>
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