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# Toolchain file is processed multiple times, however, it cannot access CMake cache on some runs.
# We store the search path in an environment variable so that we can always access it.
if (NOT "${PICO_TOOLCHAIN_PATH}" STREQUAL "")
set(ENV{PICO_TOOLCHAIN_PATH} "${PICO_TOOLCHAIN_PATH}")
endif ()
# Find the compiler executable and store its path in a cache entry ${compiler_path}.
# If not found, issue a fatal message and stop processing. PICO_TOOLCHAIN_PATH can be provided from
# commandline as additional search path.
function(pico_find_compiler compiler_path compiler_exe)
# Search user provided path first.
find_program(
${compiler_path} ${compiler_exe}
PATHS ENV PICO_TOOLCHAIN_PATH
PATH_SUFFIXES bin
NO_DEFAULT_PATH
)
# If not then search system paths.
if ("${${compiler_path}}" STREQUAL "${compiler_path}-NOTFOUND")
if (DEFINED ENV{PICO_TOOLCHAIN_PATH})
message(WARNING "PICO_TOOLCHAIN_PATH specified ($ENV{PICO_TOOLCHAIN_PATH}), but ${compiler_exe} not found there")
endif()
find_program(${compiler_path} ${compiler_exe})
endif ()
if ("${${compiler_path}}" STREQUAL "${compiler_path}-NOTFOUND")
set(PICO_TOOLCHAIN_PATH "" CACHE PATH "Path to search for compiler.")
message(FATAL_ERROR "Compiler '${compiler_exe}' not found, you can specify search path with\
\"PICO_TOOLCHAIN_PATH\".")
endif ()
endfunction()
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