/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread -Wall -Wextra -Werror=implicit-function-declaration libintl/gettext_l.c -o libintl/gettext_l -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -liconv -latomic libintl/gettext_l.c:4:10: fatal error: 'libintl.h' file not found #include ^~~~~~~~~~~ 1 error generated.