On 13/12/18 10:39 AM, Alan Braslau wrote: > On Thu, 13 Dec 2018 10:03:40 +1300 > Henri Menke <henrime...@gmail.com> wrote: > >> Sorry, my mistake, the Bessel functions are not a GCC extension but >> POSIX standard functions. >> http://pubs.opengroup.org/onlinepubs/9699919799/functions/j0.html >> Since TeX Live is always built on a POSIX platform (MSYS2 on Windows), >> you can expect j0 etc. to be available in LuaTeX. > > That is true for the Bessel functions, but not for some other "-lmath" > functions (such as the erf), so they may depend on the system.
erf definitely does not depend on the system. That is part of the C Standard library. https://en.cppreference.com/w/c/numeric/math/erf But in general you are right. The zoo of special functions in the Standard library and POSIX is rather limited. Personally I prefer using the GNU Scientific library if I need special functions. https://www.gnu.org/software/gsl/doc/html/index.html Earlier this year I wrote a TUGboat article about using GSL with FFI in LuaTeX. https://tug.org/TUGboat/tb39-1/tb121menke-ffi.pdf I also plan on submitting an abstract about that topic for TUG2019 in Palo Alto. > > Alan > ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________
