/Applications/GRASS-7.5.app/Contents/Resources/bin/clang -I/Applications/GRASS-7.5.app/Contents/Resources/include -g -O2  -fno-common -I/Applications/GRASS-7.5.app/Contents/Resources/include -I/Users/cmbarton/grass_source/trunk/dist.x86_64-apple-darwin17.6.0/include -I/Users/cmbarton/grass_source/trunk/dist.x86_64-apple-darwin17.6.0/include    -DPACKAGE=\""grasslibs"\"   -I/Users/cmbarton/grass_source/trunk/dist.x86_64-apple-darwin17.6.0/include -I/Users/cmbarton/grass_source/trunk/dist.x86_64-apple-darwin17.6.0/include -DRELDIR=\"lib/calc\" -o OBJ.x86_64-apple-darwin17.6.0/function.o -c function.c
function.c:14:22: error: use of undeclared identifier 'f_ceil'
    {"ceil", c_unop, f_ceil},
                     ^
function.c:15:23: error: use of undeclared identifier 'f_floor'; did you mean 'f_float'?
    {"floor", c_unop, f_floor},
                      ^~~~~~~
                      f_float
/Applications/GRASS-7.5.app/Contents/Resources/include/grass/defs/calc.h:63:15: note: 'f_float' declared here
extern func_t f_float;
              ^
2 errors generated.
make: *** [OBJ.x86_64-apple-darwin17.6.0/function.o] Error 1