Mercurial > hg > octave-lyh > gnulib-hg
changeset 7620:40449f2d490e
* m4/longlong.m4 (AC_TYPE_LONG_LONG_INT): Detect bug in
Tandem NonStop Kernel (OSS) cc -O circa 2004, reported by
Matthew Woehlke.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Wed, 08 Nov 2006 06:21:38 +0000 |
parents | e0804993a043 |
children | 58ded23174d2 |
files | ChangeLog m4/longlong.m4 |
diffstat | 2 files changed, 32 insertions(+), 4 deletions(-) [+] |
line wrap: on
line diff
--- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,9 @@ 2006-11-07 Paul Eggert <eggert@cs.ucla.edu> + * m4/longlong.m4 (AC_TYPE_LONG_LONG_INT): Detect bug in + Tandem NonStop Kernel (OSS) cc -O circa 2004, reported by + Matthew Woehlke. + * lib/xalloc.h (XMALLOC, XNMALLOC, XZALLOC, XCALLOC): Move definitions up, to avoid colliding with change below. (static_inline) [HAVE_INLINE]: New macro.
--- a/m4/longlong.m4 +++ b/m4/longlong.m4 @@ -1,4 +1,4 @@ -# longlong.m4 serial 8 +# longlong.m4 serial 9 dnl Copyright (C) 1999-2006 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -11,7 +11,7 @@ # assume 2.61 everywhere. # Note: If the type 'long long int' exists but is only 32 bits large -# (as on some very old compilers), AC_TYPE_LONG_LONG_INT will not be +# (as on some very old compilers), HAVE_LONG_LONG_INT will not be # defined. In this case you can treat 'long long int' like 'long int'. AC_DEFUN([AC_TYPE_LONG_LONG_INT], @@ -28,9 +28,33 @@ [[long long int llmax = 9223372036854775807ll; return ((ll << 63) | (ll >> 63) | (ll < i) | (ll > i) | (llmax / ll) | (llmax % ll));]])], - [ac_cv_type_long_long_int=yes], + [dnl This catches a bug in Tandem NonStop Kernel (OSS) cc -O circa 2004. + dnl If cross compiling, assume the bug isn't important, since + dnl nobody cross compiles for this platform as far as we know. + AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[@%:@include <limits.h> + @%:@ifndef LLONG_MAX + @%:@ define HALF \ + (1LL << (sizeof (long long int) * CHAR_BIT - 2)) + @%:@ define LLONG_MAX (HALF - 1 + HALF) + @%:@endif]], + [[long long int n = 1; + int i; + for (i = 0; ; i++) + { + long long int m = n << i; + if (m >> i != n) + return 1; + if (LLONG_MAX / 2 < m) + break; + } + return 0;]])], + [ac_cv_type_long_long_int=yes], + [ac_cv_type_long_long_int=no], + [ac_cv_type_long_long_int=cross-compiling])], [ac_cv_type_long_long_int=no])]) - if test $ac_cv_type_long_long_int = yes; then + if test $ac_cv_type_long_long_int != no; then AC_DEFINE([HAVE_LONG_LONG_INT], 1, [Define to 1 if the system has the type `long long int'.]) fi