diff options
| -rwxr-xr-x | configure | 35 | ||||
| -rw-r--r-- | configure.in | 14 |
2 files changed, 32 insertions, 17 deletions
@@ -1,6 +1,6 @@ #! /bin/sh -# From configure.in Revision: 1.135 +# From configure.in Revision: 1.136 # Guess values for system-dependent variables and create Makefiles. # Generated automatically using autoconf version 2.13 @@ -5604,35 +5604,46 @@ fi # or fills with zeros (like the Cray J90, according to Tim Peters). echo $ac_n "checking whether right shift extends the sign bit""... $ac_c" 1>&6 echo "configure:5607: checking whether right shift extends the sign bit" >&5 +if eval "test \"`echo '$''{'ac_cv_rshift_extends_sign'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + if test "$cross_compiling" = yes; then { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; } else cat > conftest.$ac_ext <<EOF -#line 5612 "configure" +#line 5616 "configure" #include "confdefs.h" int main() { - return ((-1)>>3 == -1) ? 1 : 0; + exit(((-1)>>3 == -1) ? 0 : 1); } EOF -if { (eval echo configure:5621: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null +if { (eval echo configure:5625: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null then - cat >> confdefs.h <<\EOF -#define SIGNED_RIGHT_SHIFT_ZERO_FILLS 1 -EOF - - echo "$ac_t""yes" 1>&6 + ac_cv_rshift_extends_sign=yes else echo "configure: failed program was:" >&5 cat conftest.$ac_ext >&5 rm -fr conftest* - echo "$ac_t""no" 1>&6 + ac_cv_rshift_extends_sign=no fi rm -fr conftest* fi +fi + +echo "$ac_t""$ac_cv_rshift_extends_sign" 1>&6 +if test "$ac_cv_rshift_extends_sign" = no +then + cat >> confdefs.h <<\EOF +#define SIGNED_RIGHT_SHIFT_ZERO_FILLS 1 +EOF + +fi + # THIS MUST BE LAST, IT CAN BREAK OTHER TESTS! # Add sys/socket.h to confdefs.h @@ -5642,12 +5653,12 @@ cat >> confdefs.h <<\EOF #endif EOF echo $ac_n "checking for socklen_t""... $ac_c" 1>&6 -echo "configure:5646: checking for socklen_t" >&5 +echo "configure:5657: checking for socklen_t" >&5 if eval "test \"`echo '$''{'ac_cv_type_socklen_t'+set}'`\" = set"; then echo $ac_n "(cached) $ac_c" 1>&6 else cat > conftest.$ac_ext <<EOF -#line 5651 "configure" +#line 5662 "configure" #include "confdefs.h" #include <sys/types.h> #if STDC_HEADERS diff --git a/configure.in b/configure.in index 763bfbd..f008555 100644 --- a/configure.in +++ b/configure.in @@ -1139,15 +1139,19 @@ AC_C_BIGENDIAN # Check whether right shifting a negative integer extends the sign bit # or fills with zeros (like the Cray J90, according to Tim Peters). AC_MSG_CHECKING(whether right shift extends the sign bit) +AC_CACHE_VAL(ac_cv_rshift_extends_sign, [ AC_TRY_RUN([ int main() { - return ((-1)>>3 == -1) ? 1 : 0; + exit(((-1)>>3 == -1) ? 0 : 1); } -], -[AC_DEFINE(SIGNED_RIGHT_SHIFT_ZERO_FILLS) - AC_MSG_RESULT(yes)], -[AC_MSG_RESULT(no)]) +], ac_cv_rshift_extends_sign=yes, ac_cv_rshift_extends_sign=no)]) +AC_MSG_RESULT($ac_cv_rshift_extends_sign) +if test "$ac_cv_rshift_extends_sign" = no +then + AC_DEFINE(SIGNED_RIGHT_SHIFT_ZERO_FILLS) +fi + # THIS MUST BE LAST, IT CAN BREAK OTHER TESTS! # Add sys/socket.h to confdefs.h |