compiling gforth 0.7.3: open-lib failed, file not found

open-lib is getting the wrong string or perhaps not parsing correctly. of all the things that could go wrong compiling old code with recent compilers, i wasn't expecting this. i have no idea what to do.

for your convenience, the code for the first error is this:

$ grep -n '' libffi.fs | sed -n 156,159p
156:\c #define ffi_ret_double1(r) (*(double *)(gforth_ritem) = r)
157:c-function ffi-ret-double1 ffi_ret_double1 r -- void
158:: ffi-ret-double ( r -- ) ffi-ret-double1 ffi-ret-void ;
159:end-c-library

errors:

file not found
in file included from *OS command line*:-1
libffi.fs:159: open-lib failed
>>>end-c-library<<<
Backtrace:
$7F8B5807A990 throw 
$7F8B580B6AE0 c(abort") 
$7F8B580B7390 compile-wrapper-function1 
 
file not found
in file included from *OS command line*:-1
cstr.fs:23: open-lib failed
>>>end-c-library<<<
Backtrace:
$7FD24ACCA990 throw 
$7FD24AD06AE0 c(abort") 
$7FD24AD07390 compile-wrapper-function1 
 
file not found
in file included from *OS command line*:-1
unix/socket.fs:48: open-lib failed
>>>end-c-library<<<
Backtrace:
$7F1C1555B990 throw 
$7F1C15597AE0 c(abort") 
$7F1C15598390 compile-wrapper-function1 
make: *** [Makefile:653: build-libcc-named] Error 1