Marc Herbert 3ebb18b882 cmake: fix utterly cryptic error handling in the -DSPARSE=y build ... Fixes commit 7a85ff7683 ("add sparse support") The sparse build needs (at least) two things: 1. sparse to be in the PATH 2. the environment variable REAL_CC to be defined and to match the value expected by CMake Fix error messages when either condition is wrong. - New error message when 1. is not satisfied: ``` CMake Error at zephyr/cmake/compiler/gcc/target.cmake:12 (find_program): Could not find CMAKE_C_COMPILER using the following names: cgcc ``` - Previous error "message" when 1. is not satisfied: ``` CMake Error at zephyr/cmake/compiler/gcc/target.cmake:17 (message): C compiler ZSDK/xtensa-intel_s1000_zephyr-elf/bin/xtensa-intel_s1000_zephyr-elf-gcc not found - Please check your toolchain installation ``` Note the "not found" cross-compiler actually exists! - New error message when 2. is not satisfied: ``` Kconfig header saved to 'ws/build-tgl/zephyr/include/generated/autoconf.h' -- Found sparse: /home/user/sparse/cgcc CMake Error at ws/zephyr/cmake/compiler/gcc/target.cmake:25 (message): The only way to override its 'cc' default when cross-compiling with sparse is unfortunately an environment variable. So you _must_ set REAL_CC at both configuration time and build time to: $ZSDK/xtensa-intel_s1000_zephyr-elf/bin/xtensa-intel_s1000_zephyr-elf-gcc ``` - Previous error "message" when 2. is not satisfied: ``` modules/hal/xtensa/include/xtensa/config/core.h:54:10: error:unable to open 'core-isa.h'` ``` Also: stop using the same name REAL_CC for both the internal CMake variable and the external sparse parameter; they're two different things so name them differently. Environment variable messes are complicated enough. Signed-off-by: Marc Herbert <marc.herbert@intel.com>		2022-09-22 15:12:22 +00:00
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clang	…
gcc	cmake: Add -gdwarf-4 at link time for gcc	2022-09-13 17:05:57 -05:00
host-gcc	…
ld_script.cmake	…
linker_flags.cmake	…
target.cmake	cmake: fix utterly cryptic error handling in the -DSPARSE=y build	2022-09-22 15:12:22 +00:00
target_baremetal.cmake	…
target_base.cmake	…
target_configure.cmake	…
target_cpp.cmake	…
target_relocation.cmake	…