isatty: Make it return true in Cygwin consoles on native Windows. * lib/isatty.c: Include <string.h>. (GetProcAddress): New macro. (GetNamedPipeClientProcessIdFuncType): New type. (GetNamedPipeClientProcessIdFunc): New variable. (QueryFullProcessImageNameFuncType): New type. (QueryFullProcessImageNameFunc): New variable. (initialized): New variable. (initialize): New function. (IsCygwinConsoleHandle): New function. (isatty): Invoke it. * doc/posix-functions/isatty.texi: Mention the issue.

Description:
tanf() function: tangent function.

Files:
lib/tanf.c
m4/tanf.m4

Depends-on:
math
extensions
tan             [test $HAVE_TANF = 0]

configure.ac:
gl_FUNC_TANF
if test $HAVE_TANF = 0; then
  AC_LIBOBJ([tanf])
fi
gl_MATH_MODULE_INDICATOR([tanf])

Makefile.am:

Include:
<math.h>

Link:
$(TANF_LIBM)

License:
LGPL

Maintainer:
all