clang -O2   -Wall -Wextra -Werror=implicit-function-declaration mqueue/mq_getattr.c -o mqueue/mq_getattr -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm   -lintl
mqueue/mq_getattr.c:106:21: warning: & has lower precedence than !=; != will be evaluated first [-Wparentheses]
        if ( attr.mq_flags & O_NONBLOCK != 0 )
                           ^~~~~~~~~~~~~~~~~
mqueue/mq_getattr.c:106:21: note: place parentheses around the '!=' expression to silence this warning
        if ( attr.mq_flags & O_NONBLOCK != 0 )
                           ^ ~~~~~~~~~~~~~~~
mqueue/mq_getattr.c:106:21: note: place parentheses around the & expression to evaluate it first
        if ( attr.mq_flags & O_NONBLOCK != 0 )
             ~~~~~~~~~~~~~~^~~~~~~~~~~~
1 warning generated.
../out/minix/basic/mqueue/mq_getattr.o: In function `main':
mqueue/mq_getattr.c:(.text+0x4e3): undefined reference to `mq_open'
mqueue/mq_getattr.c:(.text+0x52f): undefined reference to `mq_getattr'
../out/minix/basic/mqueue/mq_getattr.o: In function `cleanup':
mqueue/mq_getattr.c:(.text+0x65b): undefined reference to `mq_unlink'
../out/minix/basic/mqueue/mq_getattr.o: In function `on_signal':
mqueue/mq_getattr.c:(.text+0x76f): undefined reference to `mq_unlink'
clang: error: linker command failed with exit code 1 (use -v to see invocation)