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# log10f.m4 serial 2
dnl Copyright (C) 2011-2012 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_LOG10F],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_LOG10])
dnl Persuade glibc <math.h> to declare log10f().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Test whether log10f() exists. Assume that log10f(), if it exists, is
dnl defined in the same library as log10().
save_LIBS="$LIBS"
LIBS="$LIBS $LOG10_LIBM"
AC_CHECK_FUNCS([log10f])
LIBS="$save_LIBS"
if test $ac_cv_func_log10f = yes; then
LOG10F_LIBM="$LOG10_LIBM"
else
HAVE_LOG10F=0
LOG10F_LIBM="$LOG10_LIBM"
fi
AC_SUBST([LOG10F_LIBM])
])
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