Description:
signbit() macro: Determine the sign bit of a floating-point number.

Files:
lib/signbitf.c
lib/signbitd.c
lib/signbitl.c
lib/float+.h
m4/signbit.m4

Depends-on:
math
float           [test $REPLACE_SIGNBIT = 1]
isnanf-nolibm   [test $REPLACE_SIGNBIT = 1]
isnand-nolibm   [test $REPLACE_SIGNBIT = 1]
isnanl-nolibm   [test $REPLACE_SIGNBIT = 1]
fpieee          [test $REPLACE_SIGNBIT = 1]
memcmp          [test $REPLACE_SIGNBIT = 1]

configure.ac:
gl_SIGNBIT
if test $REPLACE_SIGNBIT = 1; then
  AC_LIBOBJ([signbitf])
  AC_LIBOBJ([signbitd])
  AC_LIBOBJ([signbitl])
fi
gl_MATH_MODULE_INDICATOR([signbit])

Makefile.am:

Include:
<math.h>

License:
LGPL

Maintainer:
Bruno Haible