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- # copysign.m4 serial 1
- dnl Copyright (C) 2011-2014 Free Software Foundation, Inc.
- dnl This file is free software; the Free Software Foundation
- dnl gives unlimited permission to copy and/or distribute it,
- dnl with or without modifications, as long as this notice is preserved.
- AC_DEFUN([gl_FUNC_COPYSIGN],
- [
- AC_REQUIRE([gl_MATH_H_DEFAULTS])
- dnl Determine COPYSIGN_LIBM.
- gl_MATHFUNC([copysign], [double], [(double, double)])
- if test $gl_cv_func_copysign_no_libm = no \
- && test $gl_cv_func_copysign_in_libm = no; then
- HAVE_COPYSIGN=0
- COPYSIGN_LIBM=
- fi
- AC_SUBST([COPYSIGN_LIBM])
- ])
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