+2011-10-10 Bruno Haible <bruno@clisp.org>
+
+ tanl: Simplify for platforms where 'long double' == 'double'.
+ * lib/tanl.c (tanl) [HAVE_SAME_LONG_DOUBLE_AS_DOUBLE]: New alternative
+ implementation.
+ * m4/tanl.m4 (gl_FUNC_TANL): Require gl_LONG_DOUBLE_VS_DOUBLE.
+ Determine TANL_LIBM according to HAVE_SAME_LONG_DOUBLE_AS_DOUBLE.
+ * modules/tanl (Depends-on): Add tan. Update conditions.
+ (configure.ac): Don't compile trigl.c if
+ HAVE_SAME_LONG_DOUBLE_AS_DOUBLE.
+
2011-10-10 Bruno Haible <bruno@clisp.org>
cosl: Simplify for platforms where 'long double' == 'double'.
-# tanl.m4 serial 5
+# tanl.m4 serial 6
dnl Copyright (C) 2010-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_DEFUN([gl_FUNC_TANL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
dnl Persuade glibc <math.h> to declare tanl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
HAVE_DECL_TANL=0
HAVE_TANL=0
dnl Find libraries needed to link lib/tanl.c, lib/trigl.c.
- AC_REQUIRE([gl_FUNC_ISNANL])
- AC_REQUIRE([gl_FUNC_FLOOR])
- AC_REQUIRE([gl_FUNC_FLOORL])
- dnl Append $ISNANL_LIBM to TANL_LIBM, avoiding gratuitous duplicates.
- case " $TANL_LIBM " in
- *" $ISNANL_LIBM "*) ;;
- *) TANL_LIBM="$TANL_LIBM $ISNANL_LIBM" ;;
- esac
- dnl Append $FLOOR_LIBM to TANL_LIBM, avoiding gratuitous duplicates.
- case " $TANL_LIBM " in
- *" $FLOOR_LIBM "*) ;;
- *) TANL_LIBM="$TANL_LIBM $FLOOR_LIBM" ;;
- esac
- dnl Append $FLOORL_LIBM to TANL_LIBM, avoiding gratuitous duplicates.
- case " $TANL_LIBM " in
- *" $FLOORL_LIBM "*) ;;
- *) TANL_LIBM="$TANL_LIBM $FLOORL_LIBM" ;;
- esac
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_TAN])
+ TANL_LIBM="$TAN_LIBM"
+ else
+ AC_REQUIRE([gl_FUNC_ISNANL])
+ AC_REQUIRE([gl_FUNC_FLOOR])
+ AC_REQUIRE([gl_FUNC_FLOORL])
+ dnl Append $ISNANL_LIBM to TANL_LIBM, avoiding gratuitous duplicates.
+ case " $TANL_LIBM " in
+ *" $ISNANL_LIBM "*) ;;
+ *) TANL_LIBM="$TANL_LIBM $ISNANL_LIBM" ;;
+ esac
+ dnl Append $FLOOR_LIBM to TANL_LIBM, avoiding gratuitous duplicates.
+ case " $TANL_LIBM " in
+ *" $FLOOR_LIBM "*) ;;
+ *) TANL_LIBM="$TANL_LIBM $FLOOR_LIBM" ;;
+ esac
+ dnl Append $FLOORL_LIBM to TANL_LIBM, avoiding gratuitous duplicates.
+ case " $TANL_LIBM " in
+ *" $FLOORL_LIBM "*) ;;
+ *) TANL_LIBM="$TANL_LIBM $FLOORL_LIBM" ;;
+ esac
+ fi
fi
AC_SUBST([TANL_LIBM])
])
Depends-on:
math
extensions
-float [test $HAVE_TANL = 0]
-isnanl [test $HAVE_TANL = 0]
-floor [test $HAVE_TANL = 0]
-floorl [test $HAVE_TANL = 0]
+tan [test $HAVE_TANL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1]
+float [test $HAVE_TANL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+isnanl [test $HAVE_TANL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+floor [test $HAVE_TANL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
+floorl [test $HAVE_TANL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
configure.ac:
gl_FUNC_TANL
if test $HAVE_TANL = 0; then
AC_LIBOBJ([tanl])
- AC_LIBOBJ([trigl])
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0; then
+ AC_LIBOBJ([trigl])
+ fi
fi
gl_MATH_MODULE_INDICATOR([tanl])