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-rw-r--r--configure.in24
1 files changed, 24 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index c8f534d5564..40e082fa423 100644
--- a/configure.in
+++ b/configure.in
@@ -231,6 +231,25 @@ fi
AC_C_BIGENDIAN
AC_CHAR_UNSIGNED
+AC_MSG_CHECKING(whether right shift preserve sign bit)
+AC_CACHE_VAL(rb_cv_rshift_sign,
+ [AC_TRY_RUN([
+#define FIXNUM_FLAG 0x01
+int
+main()
+{
+ return (-1!=(((-1)<<1)&FIXNUM_FLAG)>>1);
+}
+],
+ rb_cv_rshift_sign=yes,
+ rb_cv_rshift_sign=no)])
+ AC_MSG_RESULT($rb_cv_rshift_sign)
+if test "$rb_cv_rshift_sign" = yes; then
+ AC_DEFINE(RSHIFT(x,y), ((x)>>y))
+else
+ AC_DEFINE(RSHIFT(x,y), (((x)<0) ? ~((~(x))>>y) : (x)>>y))
+fi
+
AC_MSG_CHECKING([count field in FILE structures])
AC_CACHE_VAL(rb_cv_fcnt,
[AC_TRY_COMPILE([#include <stdio.h>],
@@ -550,6 +569,11 @@ if test "$host_os" = "beos"; then
esac
fi
+if test "$enable_shared" = 'yes'; then
+ LIBRUBY='libruby.so'
+ LIBRUBYARG='-L./ -lruby'
+fi
+
if test "$host_os" = "rhapsody" ; then
CFLAGS="$CFLAGS -no-precomp"
fi