| # powf.m4 serial 2 |
| dnl Copyright (C) 2011-2020 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_POWF], |
| [ |
| AC_REQUIRE([gl_MATH_H_DEFAULTS]) |
| AC_REQUIRE([gl_FUNC_POW]) |
| |
| dnl Persuade glibc <math.h> to declare powf(). |
| AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
| |
| dnl Test whether powf() exists. Assume that powf(), if it exists, is |
| dnl defined in the same library as pow(). |
| save_LIBS="$LIBS" |
| LIBS="$LIBS $POW_LIBM" |
| AC_CHECK_FUNCS([powf]) |
| LIBS="$save_LIBS" |
| if test $ac_cv_func_powf = yes; then |
| POWF_LIBM="$POW_LIBM" |
| else |
| HAVE_POWF=0 |
| POWF_LIBM="$POW_LIBM" |
| fi |
| AC_SUBST([POWF_LIBM]) |
| ]) |
