1 files changed, 107 insertions, 0 deletions
diff --git a/tool/m4/ruby_check_sizeof.m4 b/tool/m4/ruby_check_sizeof.m4
new file mode 100644
index 0000000000..7379dda83a
--- /dev/null
+++ b/tool/m4/ruby_check_sizeof.m4
@@ -0,0 +1,107 @@
+dnl RUBY_CHECK_SIZEOF [typename], [maybe same size types], [macros], [include]
+AC_DEFUN([RUBY_CHECK_SIZEOF],
+[dnl
+AS_VAR_PUSHDEF([rbcv_var], [rbcv_sizeof_var])dnl
+AS_VAR_PUSHDEF([cond], [rbcv_sizeof_cond])dnl
+AS_VAR_PUSHDEF([t], [rbcv_sizeof_type])dnl
+AS_VAR_PUSHDEF([s], [rbcv_sizeof_size])dnl
+]
+[m4_bmatch([$1], [\.], [], [if test "$universal_binary" = yes; then])
+AC_CACHE_CHECK([size of $1], [AS_TR_SH([ac_cv_sizeof_$1])], [
+    unset AS_TR_SH(ac_cv_sizeof_$1)
+    rbcv_var="
+typedef m4_bpatsubst([$1], [\..*]) ac__type_sizeof_;
+static ac__type_sizeof_ *rbcv_ptr;
+@%:@define AS_TR_CPP(SIZEOF_$1) sizeof((*rbcv_ptr)[]m4_bmatch([$1], [\.], .m4_bpatsubst([$1], [^[^.]*\.])))
+"
+    m4_ifval([$2], [test -z "${AS_TR_SH(ac_cv_sizeof_$1)+set}" && {
+    for t in $2; do
+	AC_COMPILE_IFELSE(
+	    [AC_LANG_BOOL_COMPILE_TRY(AC_INCLUDES_DEFAULT([$4]
+		[$rbcv_var]),
+		[AS_TR_CPP(SIZEOF_$1) == sizeof($t)])], [
+		AS_TR_SH(ac_cv_sizeof_$1)=AS_TR_CPP([SIZEOF_]$t)
+		break])
+    done
+    }], [
+	AC_COMPUTE_INT([AS_TR_SH(ac_cv_sizeof_$1)], [AS_TR_CPP(SIZEOF_$1)],
+	    [AC_INCLUDES_DEFAULT([$4])
+$rbcv_var],
+	    [AS_TR_SH(ac_cv_sizeof_$1)=])
+    ])
+    unset cond
+    m4_ifval([$3], [test -z "${AS_TR_SH(ac_cv_sizeof_$1)+set}" && {
+    for s in 32 64 128; do
+	for t in $3; do
+	    cond="${cond}
+@%:@${cond+el}if defined(__${t}${s}__) || defined(__${t}${s}) || defined(_${t}${s}) || defined(${t}${s})"
+	    hdr="AC_INCLUDES_DEFAULT([$4
+@%:@if defined(__${t}${s}__) || defined(__${t}${s}) || defined(_${t}${s}) || defined(${t}${s})
+@%:@ define AS_TR_CPP(HAVE_$1) 1
+@%:@else
+@%:@ define AS_TR_CPP(HAVE_$1) 0
+@%:@endif])"
+	    AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$hdr], [!AS_TR_CPP(HAVE_$1)])], [continue])
+	    AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$hdr]
+				[$rbcv_var],
+				[AS_TR_CPP(HAVE_$1) == (AS_TR_CPP(SIZEOF_$1) == ($s / $rb_cv_char_bit))])],
+		[AS_TR_SH(ac_cv_sizeof_$1)="${AS_TR_SH(ac_cv_sizeof_$1)+${AS_TR_SH(ac_cv_sizeof_$1)-} }${t}${s}"; continue])
+	    AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([$hdr]
+[
+@%:@if AS_TR_CPP(HAVE_$1)
+$rbcv_var
+@%:@else
+@%:@define AS_TR_CPP(SIZEOF_$1) 0
+@%:@endif
+],
+		    [AS_TR_CPP(HAVE_$1) == (AS_TR_CPP(SIZEOF_$1) == (m4_bmatch([$2], [^[0-9][0-9]*$], [$2], [($s / $rb_cv_char_bit)])))])],
+		[AS_TR_SH(ac_cv_sizeof_$1)="${AS_TR_SH(ac_cv_sizeof_$1)+${AS_TR_SH(ac_cv_sizeof_$1)-} }${t}${s}m4_bmatch([$2], [^[0-9][0-9]*$], [:$2])"])
+	done
+    done
+    }])
+    test "${AS_TR_SH(ac_cv_sizeof_$1)@%:@@<:@1-9@:>@}" = "${AS_TR_SH(ac_cv_sizeof_$1)}" &&
+    m4_ifval([$2][$3],
+	[test "${AS_TR_SH(ac_cv_sizeof_$1)@%:@SIZEOF_}" = "${AS_TR_SH(ac_cv_sizeof_$1)}" && ]){
+    test "$universal_binary" = yes && cross_compiling=yes
+    AC_COMPUTE_INT([t], AS_TR_CPP(SIZEOF_$1), [AC_INCLUDES_DEFAULT([$4])]
+[${cond+$cond
+@%:@else}
+$rbcv_var
+${cond+@%:@endif}
+@%:@ifndef AS_TR_CPP(SIZEOF_$1)
+@%:@define AS_TR_CPP(SIZEOF_$1) 0
+@%:@endif], [t=0])
+    test "$universal_binary" = yes && cross_compiling=$real_cross_compiling
+    AS_IF([test ${t-0} != 0], [
+	AS_TR_SH(ac_cv_sizeof_$1)="${AS_TR_SH(ac_cv_sizeof_$1)+${AS_TR_SH(ac_cv_sizeof_$1)-} }${t}"
+    ])
+    }
+    : ${AS_TR_SH(ac_cv_sizeof_$1)=0}
+])
+{
+    unset cond
+    for t in ${AS_TR_SH(ac_cv_sizeof_$1)-}; do
+	AS_CASE(["$t"],
+	[[[0-9]*|SIZEOF_*]], [
+	    ${cond+echo "@%:@else"}
+	    echo "[@%:@define ]AS_TR_CPP(SIZEOF_$1) $t"
+	    break
+	    ],
+	[
+	    s=`expr $t : ['.*[^0-9]\([0-9][0-9]*\)$']`
+	    AS_CASE([$t], [*:*], [t="${t%:*}"], [s=`expr $s / $rb_cv_char_bit`])
+	    echo "@%:@${cond+el}if defined(__${t}__) || defined(__${t}) || defined(_${t}) || defined($t)"
+	    echo "@%:@define AS_TR_CPP(SIZEOF_$1) $s"
+	    cond=1
+	    ])
+    done
+    ${cond+echo "@%:@endif"}
+} >> confdefs.h
+m4_bmatch([$1], [\.], [], [else
+AC_CHECK_SIZEOF([$1], 0, [$4])
+fi])
+AS_VAR_POPDEF([rbcv_var])dnl
+AS_VAR_POPDEF([cond])dnl
+AS_VAR_POPDEF([t])dnl
+AS_VAR_POPDEF([s])dnl
+])dnl