diff options
Diffstat (limited to 'contrib/site-conf/m4')
| -rw-r--r-- | contrib/site-conf/m4/squeak.m4 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/contrib/site-conf/m4/squeak.m4 b/contrib/site-conf/m4/squeak.m4 new file mode 100644 index 0000000000..9d16f468b4 --- /dev/null +++ b/contrib/site-conf/m4/squeak.m4 @@ -0,0 +1,15 @@ +# Tests from squeak +AC_DEFUN([AC_C_DOUBLE_ALIGNMENT], +[AC_CACHE_CHECK([whether unaligned access to doubles is ok], ac_cv_double_align, + AC_TRY_RUN([f(int i){*(double *)i=*(double *)(i+4);} + int main(){char b[[12]];f(b);return 0;}], + ac_cv_double_align="yes", ac_cv_double_align="no")) +test "$ac_cv_double_align" = "no" && AC_DEFINE(DOUBLE_WORD_ALIGNMENT)]) + +AC_DEFUN([AC_C_DOUBLE_ORDER], +[AC_CACHE_CHECK([whether doubles are stored in Squeak order], ac_cv_double_order, + AC_TRY_RUN([union { double d; int i[[2]]; } d; + int main(void) { d.d= 1.0; return d.i[[0]] == 0; }], + ac_cv_double_order="yes", ac_cv_double_order="no")) +test "$ac_cv_double_order" = "no" && AC_DEFINE(DOUBLE_WORD_ORDER)]) + |