+2011-10-10 Bruno Haible <bruno@clisp.org>
+
+ asinl: Simplify for platforms where 'long double' == 'double'.
+ * lib/asinl.c (asinl) [HAVE_SAME_LONG_DOUBLE_AS_DOUBLE]: New
+ alternative implementation.
+ * m4/asinl.m4 (gl_FUNC_ASINL): Require gl_LONG_DOUBLE_VS_DOUBLE.
+ Determine ASINL_LIBM according to HAVE_SAME_LONG_DOUBLE_AS_DOUBLE.
+ * modules/asinl (Depends-on): Add asin. Update conditions.
+
2011-10-10 Bruno Haible <bruno@clisp.org>
tanl: Simplify for platforms where 'long double' == 'double'.
-# asinl.m4 serial 5
+# asinl.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_ASINL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
dnl Persuade glibc <math.h> to declare asinl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
HAVE_DECL_ASINL=0
HAVE_ASINL=0
dnl Find libraries needed to link lib/asinl.c.
- AC_REQUIRE([gl_FUNC_SQRTL])
- dnl Append $SQRTL_LIBM to ASINL_LIBM, avoiding gratuitous duplicates.
- case " $ASINL_LIBM " in
- *" $SQRTL_LIBM "*) ;;
- *) ASINL_LIBM="$ASINL_LIBM $SQRTL_LIBM" ;;
- esac
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_ASIN])
+ ASINL_LIBM="$ASIN_LIBM"
+ else
+ AC_REQUIRE([gl_FUNC_SQRTL])
+ dnl Append $SQRTL_LIBM to ASINL_LIBM, avoiding gratuitous duplicates.
+ case " $ASINL_LIBM " in
+ *" $SQRTL_LIBM "*) ;;
+ *) ASINL_LIBM="$ASINL_LIBM $SQRTL_LIBM" ;;
+ esac
+ fi
fi
AC_SUBST([ASINL_LIBM])
])
Depends-on:
math
extensions
-sqrtl [test $HAVE_ASINL = 0]
+asin [test $HAVE_ASINL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1]
+sqrtl [test $HAVE_ASINL = 0 && test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
configure.ac:
gl_FUNC_ASINL