cc -O2 -pipe  -pthread  -Wall -Wextra -Werror=implicit-function-declaration wordexp/wordfree.c -o wordexp/wordfree -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread 
wordexp/wordfree.c:5:10: fatal error: 'wordexp.h' file not found
    5 | #include <wordexp.h>
      |          ^~~~~~~~~~~
1 error generated.