C17 !=\ if command -v c17 >/dev/null || ! command -v cc >/dev/null; then\ echo c17;\ else\ echo cc -std=c17;\ fi TEST_CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_GNU_SOURCE -DWITH_BACKTRACE TEST_CFLAGS = -g TEST_LDFLAGS = -lunwind -ldw OBJ_BACKTRACE = libtest_print_backtrace.o