using the tango-0.99.8 bundle with linux-dmd.1.041, code coverage analysis results in a linker error:
> dmd -cov ...
tango-0.99.8-bin-linux-dmd.1.041/bin/../lib/libtango-base-dmd.a(cover.o): In function `_D2rt5cover8readFileFAaKAaZb':
rt/cover.d:(.text._D2rt5cover8readFileFAaKAaZb+0x46): undefined reference to `fcntl_O_RDONLY'
collect2: ld returned 1 exit status
--- errorlevel 1