New module 'atanf'. * lib/math.in.h (atanf): New declaration. * lib/atanf.c: New file. * m4/atanf.m4: New file. * m4/math_h.m4 (gl_MATH_H): Test whether atanf is declared. (gl_MATH_H_DEFAULTS): Initialize GNULIB_ATANF, HAVE_ATANF. * modules/math (Makefile.am): Substitute GNULIB_ATANF, HAVE_ATANF. * modules/atanf: New file. * tests/test-math-c++.cc: Check the declaration of atanf. * doc/posix-functions/atanf.texi: Mention the new module.

Files:
tests/test-snprintf-posix.c
tests/test-snprintf-posix.h
tests/test-snprintf.c
tests/minus-zero.h
tests/infinity.h
tests/nan.h
tests/signature.h
tests/macros.h

Depends-on:
stdint
float

configure.ac:
AC_DEFINE([CHECK_SNPRINTF_POSIX], 1,
  [Define to 1 for strict checking in test-snprintf.c.])

Makefile.am:
TESTS += test-snprintf-posix test-snprintf
check_PROGRAMS += test-snprintf-posix test-snprintf