-# round.m4 serial 5
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# round.m4 serial 7
+dnl Copyright (C) 2007, 2009-2010 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.
[
save_LIBS="$LIBS"
LIBS="$LIBS $ROUND_LIBM"
- AC_TRY_RUN([
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <float.h>
#include <math.h>
int main()
* (double) (1U << ((DBL_MANT_DIG + 4) / 5));
volatile double x = 0.5 - 0.5 / TWO_MANT_DIG;
exit (x < 0.5 && round (x) != 0.0);
-}], [gl_cv_func_round_works=yes], [gl_cv_func_round_works=no],
+}]])], [gl_cv_func_round_works=yes], [gl_cv_func_round_works=no],
[case "$host_os" in
netbsd*) gl_cv_func_round_works="guessing no";;
*) gl_cv_func_round_works="guessing yes";;
AC_LIBOBJ([round])
gl_FUNC_FLOOR_LIBS
gl_FUNC_CEIL_LIBS
- ROUND_LIBM="$FLOOR_LIBM $CEIL_LIBM"
+ ROUND_LIBM=
+ dnl Append $FLOOR_LIBM to ROUND_LIBM, avoiding gratuitous duplicates.
+ case " $ROUND_LIBM " in
+ *" $FLOOR_LIBM "*) ;;
+ *) ROUND_LIBM="$ROUND_LIBM $FLOOR_LIBM" ;;
+ esac
+ dnl Append $CEIL_LIBM to ROUND_LIBM, avoiding gratuitous duplicates.
+ case " $ROUND_LIBM " in
+ *" $CEIL_LIBM "*) ;;
+ *) ROUND_LIBM="$ROUND_LIBM $CEIL_LIBM" ;;
+ esac
fi
AC_SUBST([ROUND_LIBM])
])