Greetings, I am a Graduate Student at UT-Austin and I am working on a class project titled "Enhancing Server Availability through failure oblivious computing methods". As part of the project, we are patching GCC to produce a failure-oblivious compiler. We have built this compiler based on the patch written by Richard Jones for a safe compiler. The patch is available here: http://sourceforge.net/projects/boundschecking/ . We are now trying to compile apache against our compiler. On running ./configure I noticed that there are some checks which are different compared to the normal GCC compiler. The difference being that: checking for memmove... no checking for bcopy... no checking for strncasecmp... no checking for strcasecmp... no checking for strdup... no checking for strstr... no checking for memchr... no Further, when we go about trying to compile by typing "make" on the command line we got the error: Making all in srclib make[1]: Entering directory `/home/ne0/Desktop/httpd- 2.2.6/srclib' Making all in apr make[2]: Entering directory `/home/ne0/Desktop/httpd-2.2.6/srclib/apr' make[3]: Entering directory `/home/ne0/Desktop/httpd-2.2.6/srclib/apr' /bin/bash /home/ne0/Desktop/httpd- 2.2.6/srclib/apr/libtool --silent --mode=compile /home/ne0/gcc-4.0.2/objdir/gcc/xgcc -pthread -B/home/ne0/gcc-4.0.2/objdir/gcc/ -fbounds-checking -fno-builtin -Wall -O2 -g -DHAVE_CONFIG_H -DLINUX=2 -D_REENTRANT -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -I./include -I/home/ne0/Desktop/httpd- 2.2.6/srclib/apr/include/arch/unix -I./include/arch/unix -I/home/ne0/Desktop/httpd-2.2.6/srclib/apr/include -o passwd/apr_getpass.lo -c passwd/apr_getpass.c && touch passwd/apr_getpass.lo In file included from ./include/apr_want.h:63, from ./include/apr_pools.h:41, from /home/ne0/Desktop/httpd-2.2.6/srclib/apr/include/arch/unix/../apr_private_common.h:24, from /home/ne0/Desktop/httpd-2.2.6/srclib/apr/include/arch/unix/apr_private.h:779, from passwd/apr_getpass.c:22: /usr/include/string.h:293: error: conflicting types for 'bcopy' /usr/include/string.h:44: error: previous declaration of 'bcopy' was here make[3]: *** [passwd/apr_getpass.lo] Error 1 make[3]: Leaving directory `/home/ne0/Desktop/httpd-2.2.6/srclib/apr' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/home/ne0/Desktop/httpd- 2.2.6/srclib/apr' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/ne0/Desktop/httpd-2.2.6/srclib' make: *** [all-recursive] Error 1 bcopy is declared only once in string.h and it seems puzzling as to where is being redeclared. Our xgcc compiler is being used with the following CFLAGS: "-B{path_of_directory containing_object_files} -fbounds-checking -fno-builtin -Wall -O2 -g". Both our failure-oblivious compiler and apache are installed on Ubuntu linux. uname -a gave the following output: Linux matrix 2.6.20-15-generic #2 SMP Sun Apr 15 07:36:31 UTC 2007 i686 GNU/Linux. We have been stuck with this issue for the last 3 days and any pointers as to how this issue can be tackled would be greatly appreciated. Thanks & Regards Sriram
