clang -O2   -Wall -Wextra -Werror=implicit-function-declaration math/nexttowardl.c -o math/nexttowardl -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm   -lintl
math/nexttowardl.c:11:14: warning: pragma STDC FENV_ACCESS ON is not supported, ignoring pragma [-Wunknown-pragmas]
#pragma STDC FENV_ACCESS ON
             ^
1 warning generated.
../out/minix/basic/math/nexttowardl.o: In function `test':
math/nexttowardl.c:(.text+0x356): undefined reference to `nexttowardl'
clang: error: linker command failed with exit code 1 (use -v to see invocation)