FreeBSD 6.1 appeared as one of the very few platforms that implement
printf "%a". Well, it implements it, but not correctly: The testsuite
revealed that for "%.2a" of 1.51 it returns "0x1.82p+0" instead of
"0x1.83p+0".
2007-04-04 Bruno Haible <[EMAIL PROTECTED]>
* m4/printf.m4 (gl_PRINTF_DIRECTIVE_A): Add a test for correct
rounding. Don't assume that FreeBSD 6 and NetBSD 4 pass this test.
--- m4/printf.m4 8 Mar 2007 13:45:22 -0000 1.12
+++ m4/printf.m4 5 Apr 2007 00:36:46 -0000
@@ -1,4 +1,4 @@
-# printf.m4 serial 2
+# printf.m4 serial 3
dnl Copyright (C) 2003, 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -115,6 +115,13 @@
&& strcmp (buf, "-0X6.488P-1 33") != 0
&& strcmp (buf, "-0XC.91P-2 33") != 0))
return 1;
+ /* This catches a FreeBSD 6.1 bug: it doesn't round. */
+ if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0
+ || (strcmp (result, "0x1.83p+0 33") != 0
+ && strcmp (result, "0x3.05p-1 33") != 0
+ && strcmp (result, "0x6.0ap-2 33") != 0
+ && strcmp (result, "0xc.14p-3 33") != 0))
+ return 1;
/* This catches a MacOS X 10.3.9 (Darwin 7.9) bug. */
if (sprintf (buf, "%.1a", 1.999) < 0
|| (strcmp (buf, "0x1.0p+1") != 0
@@ -149,18 +156,9 @@
[gl_cv_func_printf_directive_a="guessing yes"],
[gl_cv_func_printf_directive_a="guessing no"])
;;
-changequote(,)dnl
- # Guess yes on FreeBSD >= 5.
- freebsd[1-4]*) gl_cv_func_printf_directive_a="guessing no";;
- freebsd* | kfreebsd*) gl_cv_func_printf_directive_a="guessing yes";;
- # Guess yes on NetBSD >= 4.
- netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
- gl_cv_func_printf_directive_a="guessing no";;
- netbsd*) gl_cv_func_printf_directive_a="guessing yes";;
# If we don't know, assume the worst.
*) gl_cv_func_printf_directive_a="guessing no";;
esac
-changequote([,])dnl
])
])
])
@@ -452,7 +450,7 @@
dnl 1 2 3 4 5 6 7 8
dnl glibc 2.5 . . . . . . . .
dnl glibc 2.3.6 . # . . . . . .
-dnl FreeBSD 5.4, 6.1 . . . . . . . .
+dnl FreeBSD 5.4, 6.1 . ? . . . . . .
dnl MacOS X 10.3.9 . # . . . . . .
dnl OpenBSD 3.9, 4.0 . # . . . . . ?
dnl Cygwin 2007 . # . . . . . ?
@@ -466,7 +464,7 @@
dnl IRIX 6.5 # # . . . . # .
dnl OSF/1 5.1 # # . . . . # .
dnl OSF/1 4.0d # # . . # # # #
-dnl NetBSD 4.0 . . . . . . . ?
+dnl NetBSD 4.0 . ? . . . . . ?
dnl NetBSD 3.0 . # . # . . . .
dnl BeOS # # . # . . . .
dnl mingw # # . # . # # #
