ruby-core

Hi all,

Here are my "patches" to Preview 7 to help cleanup the
-Wall warnings for Suse Linux 8.0 with gcc 3.2.  Note
that the largest offender is eval.c, which often
complains with this warning:

"variable `some_var' might be clobbered by `longjmp'
or `vfork'"

I tried declaring some of these as volatile just to
see what would happen but that seemed to cause more
problems.

Also, see some comments at the end.


# diff bignum.c ../ruby-1.8.0/bignum.c
451c451
<     while ((c = *str++)) {
---
>     while (c = *str++) {

# diff dir.c ../ruby-1.8.0/dir.c
155c155
<     while ((c = *pat++)) {
---
>     while (c = *pat++) {

# diff eval.c ../ruby-1.8.0/eval.c
1098c1098
<           if ((tail = memchr(einfo, '\n', elen))) {
---
>           if (tail = memchr(einfo, '\n', elen)) {
1449c1449
<     volatile VALUE result = Qnil;
---
>     VALUE result;             /* OK */
1585c1585
<     VALUE val = Qnil;
---
>     VALUE val;                        /* OK */
1630c1630
<     VALUE val = Qnil;
---
>     VALUE val;                        /* OK */
3660c3660
<     VALUE result = Qnil;
---
>     VALUE result;             /* OK */
4500c4500
<       while ((eclass = va_arg(args, VALUE))) {
---
>       while (eclass = va_arg(args, VALUE)) {
4597c4597
<     VALUE result = Qnil;
---
>     VALUE result;             /* OK */
5555c5555
<     VALUE val = Qnil;
---
>     VALUE val;                        /* OK */
7413c7413
<     VALUE result = Qnil;
---
>     VALUE result;     /* OK */
7959c7959
<     VALUE val = Qnil;
---
>     VALUE val;                        /* OK */
10063c10063
<     VALUE val = Qnil;
---
>     VALUE val;                        /* OK */
linux:/usr/local/src/ruby-1.8.0nowarn #

# diff marshal.c ../ruby-1.8.0/marshal.c
478c478
<       if ((ivtbl = rb_generic_ivar_table(obj))) {
---
>       if (ivtbl = rb_generic_ivar_table(obj)) {

# diff process.c ../ruby-1.8.0/process.c
626,627c626,627
<     if ((*a++ = strtok(ss, " \t"))) {
<       while ((t = strtok(NULL, " \t"))) {
---
>     if (*a++ = strtok(ss, " \t")) {
>       while (t = strtok(NULL, " \t")) {

# diff re.c ../ruby-1.8.0/re.c
82c82
<       if ((tmp = casetable[(unsigned)*p1++] -
casetable[(unsigned)*p2++]))
---
>       if (tmp = casetable[(unsigned)*p1++] -
casetable[(unsigned)*p2++])

# diff ruby.c ../ruby-1.8.0/ruby.c
195c195
<           if ((s = strchr(p, sep))) {
---
>           if (s = strchr(p, sep)) {
385c385
<           if ((p = strchr(s, '='))) {
---
>           if (p = strchr(s, '=')) {
834c834
<                   if ((p =
strstr(RSTRING(line)->ptr, "ruby"))) {
---
>                   if (p = strstr(RSTRING(line)->ptr,
"ruby")) {
886c886
<               if ((p = strstr(p, " -"))) {
---
>               if (p = strstr(p, " -")) {

# diff struct.c ../ruby-1.8.0/struct.c
217c217
<     while ((mem = va_arg(ar, char*))) {
---
>     while (mem = va_arg(ar, char*)) {




Other notes
===========

The process.c file still gives me these warnings:

process.c: In function `rb_syswait':
process.c:840: warning: `hfunc' might be used
uninitialized in this function
process.c:840: warning: `qfunc' might be used
uninitialized in this function
process.c:840: warning: `ifunc' might be used
uninitialized in this function
process.c: In function `proc_getpgid':
process.c:1081: warning: implicit declaration of
function `getpgid'
process.c: In function `p_sys_setresuid':
process.c:1236: warning: implicit declaration of
function `setresuid'
process.c: In function `p_sys_setresgid':
process.c:1471: warning: implicit declaration of
function `setresgid'

I am not sure why it's giving me "implicit
declaration" warnings when it appears that unistd.h is
being included at the top of the header.  Could

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

be failing somehow?  The config log seems to indicate
that unistd.h was detected, so I don't see why it
should be failing.

Other warnings:
===============
parse.y:4443: warning: `nodeline' defined but not used
regex.c:2572: warning: `insert_op' defined but not
used
regex.c:1000: warning: `print_compiled_pattern'
defined but not used

Can we remove these functions?

That's all for now.

Regards,

Dan

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