comiling common.c of conky-1.6.1 
CFLAGS="-O2 -march=native -mtune=native -pipe -fomit-frame-pointer -ffast-math"

i486-slackware-linux-gcc -DHAVE_CONFIG_H -I. -DSYSTEM_CONFIG_FILE=\"/etc/conky/c
onky.conf\"    -O2 -march=native -mtune=native -pipe -fomit-frame-pointer -ffast
-math -pthread -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/includ
e/gtk-2.0 -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/libmowgli
 -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/lib/gtk-2.0/include
-I/usr/include/atk-1.0 -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/i
nclude/pixman-1   -I/usr/include/libxml2           -I/usr/include/freetype2   -I
/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include   -Wall -W -MT common.o -MD -M
P -MF .deps/common.Tpo -c -o common.o common.c
common.c: In function 'update_stuff':
common.c:399: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[2]: *** [common.o] Error 1
make[2]: Leaving directory `/tmp/SBo/conky-1.6.1/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/tmp/SBo/conky-1.6.1/src'
make: *** [all-recursive] Error 1

source :
/* Conky, a system monitor, based on torsmo
 *
 * Any original torsmo code is licensed under the BSD license
 *
 * All code written since the fork of torsmo is licensed under the GPL
 *
 * Please see COPYING for details
 *
 * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
 * Copyright (c) 2005-2008 Brenden Matthews, Philip Kovacs, et. al.
 *	(see AUTHORS)
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * $Id: common.c 1193 2008-06-21 20:37:58Z ngarofil $ */

#include "conky.h"
#include <ctype.h>
#include <errno.h>
#include <sys/time.h>
#include <pthread.h>

#ifndef HAVE_STRNDUP
// use our own strndup() if it's not available
char *strndup(const char *s, size_t n)
{
	if (strlen(s) + 1 > n) {
		char *ret = malloc(n);
		strncpy(ret, s, n);
		return ret;
	} else {
		return strdup(s);
	}
}
#endif /* HAVE_STRNDUP */

void update_uname(void)
{
	uname(&info.uname_s);
}

double get_time(void)
{
	struct timeval tv;

	gettimeofday(&tv, 0);
	return tv.tv_sec + (tv.tv_usec / 1000000.0);
}

FILE *open_file(const char *file, int *reported)
{
	FILE *fp = fopen(file, "r");

	if (!fp) {
		if (!reported || *reported == 0) {
			ERR("can't open %s: %s", file, strerror(errno));
			if (reported) {
				*reported = 1;
			}
		}
		return 0;
	}

	return fp;
}

void variable_substitute(const char *s, char *dest, unsigned int n)
{
	while (*s && n > 1) {
		if (*s == '$') {
			s++;
			if (*s != '$') {
				char buf[256];
				const char *a, *var;
				unsigned int len;

				/* variable is either $foo or ${foo} */
				if (*s == '{') {
					s++;
					a = s;
					while (*s && *s != '}') {
						s++;
					}
				} else {
					a = s;
					while (*s && (isalnum((int) *s) || *s == '_')) {
						s++;
					}
				}

				/* copy variable to buffer and look it up */
				len = (s - a > 255) ? 255 : (s - a);
				strncpy(buf, a, len);
				buf[len] = '\0';

				if (*s == '}') {
					s++;
				}

				var = getenv(buf);

				if (var) {
					/* add var to dest */
					len = strlen(var);
					if (len >= n) {
						len = n - 1;
					}
					strncpy(dest, var, len);
					dest += len;
					n -= len;
				}
				continue;
			}
		}

		*dest++ = *s++;
		n--;
	}

	*dest = '\0';
}

/* network interface stuff */

static struct net_stat netstats[16];

struct net_stat *get_net_stat(const char *dev)
{
	unsigned int i;

	if (!dev) {
		return 0;
	}

	/* find interface stat */
	for (i = 0; i < 16; i++) {
		if (netstats[i].dev && strcmp(netstats[i].dev, dev) == 0) {
			return &netstats[i];
		}
	}

	/* wasn't found? add it */
	if (i == 16) {
		for (i = 0; i < 16; i++) {
			if (netstats[i].dev == 0) {
				netstats[i].dev = strndup(dev, text_buffer_size);
				return &netstats[i];
			}
		}
	}

	CRIT_ERR("too many interfaces used (limit is 16)");
	return 0;
}

void clear_net_stats(void)
{
	memset(netstats, 0, sizeof(netstats));
}

void free_dns_data(void)
{
	int i;
	struct dns_data *data = &info.nameserver_info;
	for (i = 0; i < data->nscount; i++)
		free(data->ns_list[i]);
	if (data->ns_list)
		free(data->ns_list);
	memset(data, 0, sizeof(struct dns_data));
}

//static double last_dns_update;

void update_dns_data(void)
{
	FILE *fp;
	char line[256];
	struct dns_data *data = &info.nameserver_info;

	/* maybe updating too often causes higher load because of /etc lying on a real FS
	if (current_update_time - last_dns_update < 10.0)
		return;
	else
		last_dns_update = current_update_time;
	*/

	free_dns_data();

	if ((fp = fopen("/etc/resolv.conf", "r")) == NULL)
		return;
	while(!feof(fp)) {
		if (fgets(line, 255, fp) == NULL) {
			break;
		}
		if (!strncmp(line, "nameserver ", 11)) {
			line[strlen(line) - 1] = '\0';	// remove trailing newline
			data->nscount++;
			data->ns_list = realloc(data->ns_list, data->nscount * sizeof(char *));
			data->ns_list[data->nscount - 1] = strndup(line + 11, text_buffer_size);
		}
	}
	fclose(fp);
}

void format_seconds(char *buf, unsigned int n, long seconds)
{
	long days;
	int hours, minutes;

	days = seconds / 86400;
	seconds %= 86400;
	hours = seconds / 3600;
	seconds %= 3600;
	minutes = seconds / 60;
	seconds %= 60;

	if (days > 0) {
		snprintf(buf, n, "%ldd %dh %dm", days, hours, minutes);
	} else {
		snprintf(buf, n, "%dh %dm %lds", hours, minutes, seconds);
	}
}

void format_seconds_short(char *buf, unsigned int n, long seconds)
{
	long days;
	int hours, minutes;

	days = seconds / 86400;
	seconds %= 86400;
	hours = seconds / 3600;
	seconds %= 3600;
	minutes = seconds / 60;
	seconds %= 60;

	if (days > 0) {
		snprintf(buf, n, "%ldd %dh", days, hours);
	} else if (hours > 0) {
		snprintf(buf, n, "%dh %dm", hours, minutes);
	} else {
		snprintf(buf, n, "%dm %lds", minutes, seconds);
	}
}

static double last_meminfo_update;
static double last_fs_update;

unsigned long long need_mask;

#define NEED(a) ((need_mask & (1 << a)) && ((info.mask & (1 << a)) == 0))

void update_stuff(void)
{
	unsigned int i;

	info.mask = 0;

	if (no_buffers) {
		need_mask |= 1 << INFO_BUFFERS;
	}

	/* clear speeds and up status in case device was removed and doesn't get
	 * updated */

	for (i = 0; i < 16; i++) {
		if (netstats[i].dev) {
			netstats[i].up = 0;
			netstats[i].recv_speed = 0.0;
			netstats[i].trans_speed = 0.0;
		}
	}

	prepare_update();

	if (NEED(INFO_UPTIME)) {
		update_uptime();
	}

	if (NEED(INFO_PROCS)) {
		update_total_processes();
	}

	if (NEED(INFO_RUN_PROCS)) {
		update_running_processes();
	}

	if (NEED(INFO_CPU)) {
		update_cpu_usage();
	}

	if (NEED(INFO_NET)) {
		update_net_stats();
	}

	if (NEED(INFO_DISKIO)) {
		update_diskio();
	}

#if defined(__linux__)
	if (NEED(INFO_I8K)) {
		update_i8k();
	}
#endif /* __linux__ */

#ifdef MPD
	if (NEED(INFO_MPD)) {
		if (!info.mpd.timed_thread) {
			init_mpd_stats(&info.mpd);
			info.mpd.timed_thread = timed_thread_create(&update_mpd,
				(void *) &info.mpd, info.music_player_interval * 1000000);
			if (!info.mpd.timed_thread) {
				ERR("Failed to create MPD timed thread");
			}
			timed_thread_register(info.mpd.timed_thread, &info.mpd.timed_thread);
			if (timed_thread_run(info.mpd.timed_thread)) {
				ERR("Failed to run MPD timed thread");
			}
		}
	}
#endif

#ifdef XMMS2
	if (NEED(INFO_XMMS2)) {
		update_xmms2();
	}
#endif

#ifdef AUDACIOUS
	if (NEED(INFO_AUDACIOUS)) {
		update_audacious();
	}
#endif

#ifdef BMPX
	if (NEED(INFO_BMPX)) {
		update_bmpx();
	}
#endif

	if (NEED(INFO_LOADAVG)) {
		update_load_average();
	}

	if ((NEED(INFO_MEM) || NEED(INFO_BUFFERS) || NEED(INFO_TOP))
			&& current_update_time - last_meminfo_update > 6.9) {
		update_meminfo();
		if (no_buffers) {
			info.mem -= info.bufmem;
			info.memeasyfree += info.bufmem;
		}
		last_meminfo_update = current_update_time;
	}
	
#ifdef X11
	if (NEED(INFO_X11)) {
		update_x11info();
	}
#endif

	if (NEED(INFO_TOP)) {
		update_top();
	}

	/* update_fs_stat() won't do anything if there aren't fs -things */
	if (NEED(INFO_FS) && current_update_time - last_fs_update > 12.9) {
		update_fs_stats();
		last_fs_update = current_update_time;
	}
#ifdef TCP_PORT_MONITOR
	if (NEED(INFO_TCP_PORT_MONITOR)) {
		update_tcp_port_monitor_collection(info.p_tcp_port_monitor_collection);
	}
#endif
	if (NEED(INFO_ENTROPY)) {
		update_entropy();
	}
#if defined(__linux__)
	if (NEED(INFO_USERS)) {
		update_users();
	}
	if (NEED(INFO_GW)) {
		update_gateway_info();
	}
#endif /* __linux__ */
	if (NEED(INFO_DNS)) {
		update_dns_data();
	}
}

int round_to_int(float f)
{
	if (f >= 0.0) {
		return (int) (f + 0.5);
	} else {
		return (int) (f - 0.5);
	}
}






cpuinfo 

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Pentium(R) Dual  CPU  E2180  @ 2.00GHz
stepping        : 13
cpu MHz         : 1999.968
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm
bogomips        : 3999.93
clflush size    : 64
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Pentium(R) Dual  CPU  E2180  @ 2.00GHz
stepping        : 13
cpu MHz         : 1999.968
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
apicid          : 1
initial apicid  : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm
bogomips        : 3999.90
clflush size    : 64
power management: