[SOLVED] Using add_compile_definitions() for a value that initializes an array

Issue

I am attempting to initialize a uint8_t array with a preprocessor definition that is overwritten in a CMakeLists.txt file. For example:

#ifndef MY_CHAR_ARRAY
#define MY_CHAR_ARRAY {0x00, 0x01, 0x02}
#endif

uint8_t str[3] = MY_CHAR_ARRAY;

What is the syntax, if it exists, to overwrite MY_CHAR_ARRAY using add_compile_definitions() in my CMakeLists.txt file?

I have made various guesses of the syntax:

add_compile_definitions(MY_CHAR_ARRAY={0xAA, 0xBB, 0xCC}) add_compile_definitions(MY_CHAR_ARRAY={0xAA}{0xBB}{0xCC} add_compile_definitions(MY_CHAR_ARRAY={0xAA},{0xBB},{0xCC} add_compile_definitions(MY_CHAR_ARRAY={0xAA} {0xBB} {0xCC} add_compile_definitions(MY_CHAR_ARRAY={0xAA0xBB0xCC} add_compile_definitions(MY_CHAR_ARRAY={0xAA 0xBB 0xCC} add_compile_definitions(MY_CHAR_ARRAY={0xAABBCC}

with no luck.

Thank you.

Solution

Enclose the whole string in double quotes.

add_compile_definitions("MY_CHAR_ARRAY={0xAA, 0xBB, 0xCC}")

Prefer target_compile_definitions.

Answered By - KamilCuk

Answer Checked By - David Goodson (WPSolving Volunteer)