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:
ldexpf() function: multiply a 'float' by a power of 2.

Files:
lib/ldexpf.c
m4/ldexpf.m4
m4/mathfunc.m4

Depends-on:
math
extensions
ldexp           [test $HAVE_LDEXPF = 0]

configure.ac:
gl_FUNC_LDEXPF
if test $HAVE_LDEXPF = 0; then
  AC_LIBOBJ([ldexpf])
fi
gl_MATH_MODULE_INDICATOR([ldexpf])

Makefile.am:

Include:
<math.h>

Link:
$(LDEXPF_LIBM)

License:
LGPL

Maintainer:
all