# Do I need "ruby-libs" as a prerequisite to install/run ruby? what is "ruby-libs" exactly? **URL:** \ **Category:** Ruby\ **Created:** [February 7, 2009, 11:43am UTC](https://www.ruby-forum.com/t/do-i-need-ruby-libs-as-a-prerequisite-to-install-run-ruby-what-is-ruby-libs-exactly/159704 "2009-02-07T11:43:39Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![greg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/71c47a/32.png) [@greg](https://www.ruby-forum.com/u/greg)\ **Post date:** [February 7, 2009, 11:43am UTC](https://www.ruby-forum.com/t/do-i-need-ruby-libs-as-a-prerequisite-to-install-run-ruby-what-is-ruby-libs-exactly/159704/1 "2009-02-07T11:43:39Z")
Hi, If I’m downloading the ruby source to compile on my Redhat linux box, do I need “ruby-libs” as a prerequisite? I’ve seen it referred to but not sure what it is? If it does exist and I need it, where would I download the source for this to build it (i.e. before then moving onto Ruby compile itself)? ---
**Author:** ![greg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/71c47a/32.png) [@greg](https://www.ruby-forum.com/u/greg)\ **Post date:** [February 7, 2009, 11:50am UTC](https://www.ruby-forum.com/t/do-i-need-ruby-libs-as-a-prerequisite-to-install-run-ruby-what-is-ruby-libs-exactly/159704/2 "2009-02-07T11:50:41Z")
2009/2/7 Greg H. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > Hi, > If I’m downloading the ruby source to compile on my Redhat linux box, do I > need “ruby-libs” as a prerequisite? I’ve seen it referred to but not sure > what it is? > > If it does exist and I need it, where would I download the source for this > to build it (i.e. before then moving onto Ruby compile itself)? PS If I just go straight to compiling ruby I do get some “no” coming back for the initial “./configure”. Is this OK? (see results of configure below) [root@home ruby-1.8.7-p72]# ./config config.status configure [root@home ruby-1.8.7-p72]# ./configure checking build system type… i686-pc-linux-gnu checking host system type… i686-pc-linux-gnu checking target system type… i686-pc-linux-gnu checking for gcc… gcc checking for C compiler default output file name… a.out checking whether the C compiler works… yes checking whether we are cross compiling… no checking for suffix of executables… checking for suffix of object files… o checking whether we are using the GNU C compiler… yes checking whether gcc accepts -g… yes checking for gcc option to accept ISO C89… none needed checking how to run the C preprocessor… gcc -E checking for grep that handles long lines and -e… /bin/grep checking for egrep… /bin/grep -E checking whether gcc needs -traditional… no checking whether the linker is GNU ld… yes checking whether gcc -E accepts -o… yes checking for bison… bison -y checking for ranlib… ranlib checking for ar… ar checking for as… as checking whether ln -s works… yes checking whether make sets $(MAKE)… yes checking for a BSD-compatible install… /usr/bin/install -c checking for AIX… no checking for ANSI C header files… yes checking for sys/types.h… yes checking for sys/stat.h… yes checking for stdlib.h… yes checking for string.h… yes checking for memory.h… yes checking for strings.h… yes checking for inttypes.h… yes checking for stdint.h… yes checking for unistd.h… yes checking minix/config.h usability… no checking minix/config.h presence… no checking for minix/config.h… no checking for special C compiler options needed for large files… no checking for \_FILE\_OFFSET\_BITS value needed for large files… 64 checking for long long… yes checking for off\_t… yes checking for int… yes checking size of int… 4 checking for short… yes checking size of short… 2 checking for long… yes checking size of long… 4 checking for long long… (cached) yes checking size of long long… 8 checking for \_\_int64… no checking size of \_\_int64… 0 checking for off\_t… (cached) yes checking size of off\_t… 8 checking for void\*… yes checking size of void\*… 4 checking for float… yes checking size of float… 4 checking for double… yes checking size of double… 8 checking for time\_t… yes checking size of time\_t… 4 checking for pid\_t… yes checking for gid\_t… yes checking for uid\_t… yes checking for prototypes… yes checking token paste string… ansi checking for variable length prototypes and stdarg.h… yes checking for noreturn function attribute… **attribute** ((noreturn)) x checking for noinline function attribute… **attribute** ((noinline)) x checking for RUBY\_EXTERN… no checking whether sys\_nerr is declared… yes checking for crypt in -lcrypt… yes checking for dlopen in -ldl… yes checking for shl\_load in -ldld… no checking for dirent.h that defines DIR… yes checking for library containing opendir… none required checking for ANSI C header files… (cached) yes checking for sys/wait.h that is POSIX.1 compatible… yes checking for stdlib.h… (cached) yes checking for string.h… (cached) yes checking for unistd.h… (cached) yes checking limits.h usability… yes checking limits.h presence… yes checking for limits.h… yes checking sys/file.h usability… yes checking sys/file.h presence… yes checking for sys/file.h… yes checking sys/ioctl.h usability… yes checking sys/ioctl.h presence… yes checking for sys/ioctl.h… yes checking sys/syscall.h usability… yes checking sys/syscall.h presence… yes checking for sys/syscall.h… yes checking fcntl.h usability… yes checking fcntl.h presence… yes checking for fcntl.h… yes checking sys/fcntl.h usability… yes checking sys/fcntl.h presence… yes checking for sys/fcntl.h… yes checking sys/select.h usability… yes checking sys/select.h presence… yes checking for sys/select.h… yes checking sys/time.h usability… yes checking sys/time.h presence… yes checking for sys/time.h… yes checking sys/times.h usability… yes checking sys/times.h presence… yes checking for sys/times.h… yes checking sys/param.h usability… yes checking sys/param.h presence… yes checking for sys/param.h… yes checking syscall.h usability… yes checking syscall.h presence… yes checking for syscall.h… yes checking pwd.h usability… yes checking pwd.h presence… yes checking for pwd.h… yes checking grp.h usability… yes checking grp.h presence… yes checking for grp.h… yes checking a.out.h usability… yes checking a.out.h presence… yes checking for a.out.h… yes checking utime.h usability… yes checking utime.h presence… yes checking for utime.h… yes checking for memory.h… (cached) yes checking direct.h usability… no checking direct.h presence… no checking for direct.h… no checking sys/resource.h usability… yes checking sys/resource.h presence… yes checking for sys/resource.h… yes checking sys/mkdev.h usability… no checking sys/mkdev.h presence… no checking for sys/mkdev.h… no checking sys/utime.h usability… no checking sys/utime.h presence… no checking for sys/utime.h… no checking netinet/in\_systm.h usability… yes checking netinet/in\_systm.h presence… yes checking for netinet/in\_systm.h… yes checking float.h usability… yes checking float.h presence… yes checking for float.h… yes checking ieeefp.h usability… no checking ieeefp.h presence… no checking for ieeefp.h… no checking pthread.h usability… yes checking pthread.h presence… yes checking for pthread.h… yes checking ucontext.h usability… yes checking ucontext.h presence… yes checking for ucontext.h… yes checking intrinsics.h usability… no checking intrinsics.h presence… no checking for intrinsics.h… no checking for rlim\_t… yes checking size of rlim\_t… 8 checking for size\_t… yes checking for struct stat.st\_blksize… yes checking for struct stat.st\_blocks… yes checking for struct stat.st\_rdev… yes checking for uid\_t in sys/types.h… (cached) yes checking type of array argument to getgroups… gid\_t checking return type of signal handlers… void checking for working alloca.h… yes checking for alloca… yes checking for working memcmp… yes checking for \_LARGEFILE\_SOURCE value needed for large files… 1 checking for ftello… yes checking for broken erfc of glibc-2.3.6 on IA64… no checking for dup2… yes checking for memmove… yes checking for strcasecmp… yes checking for strncasecmp… yes checking for strerror… yes checking for strftime… yes checking for strchr… yes checking for strstr… yes checking for strtoul… yes checking for crypt… yes checking for flock… yes checking for vsnprintf… yes checking for isnan… yes checking for finite… yes checking for isinf… yes checking for hypot… yes checking for acosh… yes checking for erf… yes checking for fmod… yes checking for killpg… yes checking for wait4… yes checking for waitpid… yes checking for syscall… yes checking for chroot… yes checking for fsync… yes checking for getcwd… yes checking for eaccess… no checking for truncate… yes checking for ftruncate… yes checking for chsize… no checking for times… yes checking for utimes… yes checking for fcntl… yes checking for lockf… yes checking for lstat… yes checking for symlink… yes checking for link… yes checking for readlink… yes checking for setitimer… yes checking for setruid… no checking for seteuid… yes checking for setreuid… yes checking for setresuid… yes checking for setproctitle… no checking for setrgid… no checking for setegid… yes checking for setregid… yes checking for setresgid… yes checking for issetugid… no checking for pause… yes checking for lchown… yes checking for lchmod… no checking for getpgrp… yes checking for setpgrp… yes checking for getpgid… yes checking for setpgid… yes checking for initgroups… yes checking for getgroups… yes checking for setgroups… yes checking for getpriority… yes checking for getrlimit… yes checking for setrlimit… yes checking for sysconf… yes checking for group\_member… yes checking for dlopen… yes checking for sigprocmask… yes checking for sigaction… yes checking for sigsetjmp… no checking for \_setjmp… yes checking for \_longjmp… yes checking for setsid… yes checking for telldir… yes checking for seekdir… yes checking for fchmod… yes checking for mktime… yes checking for timegm… yes checking for gettimeofday… yes checking for cosh… yes checking for sinh… yes checking for tanh… yes checking for round… yes checking for setuid… yes checking for setgid… yes checking for setenv… yes checking for unsetenv… yes checking for \_\_builtin\_setjmp… no checking for setjmp type… \_setjmp checking whether struct tm is in sys/time.h or time.h… time.h checking for struct tm.tm\_zone… yes checking for struct tm.tm\_gmtoff… yes checking for external int daylight… yes checking for external timezone… long checking for external altzone… no checking for negative time\_t for gmtime(3)… yes checking whether getpgrp requires zero arguments… yes checking whether setpgrp takes no argument… yes checking whether byte ordering is bigendian… no checking for an ANSI C-conforming const… yes checking whether char is unsigned… no checking for inline… inline checking for working volatile… yes checking whether right shift preserve sign bit… yes checking read count field in FILE structures… not found(OK if using GNU libc) checking read buffer ptr field in FILE structures… \_IO\_read\_ptr checking read buffer end field in FILE structures… \_IO\_read\_end checking whether need to seek between R/W… no checking whether st\_ino is huge… yes checking whether \_SC\_CLK\_TCK is supported… yes checking stack growing direction… (cached) -1 checking whether ELF binaries are produced… yes checking whether OS depend dynamic link works… yes checking for nroff… /usr/bin/nroff config.h unchanged configure: creating ./config.status config.status: creating Makefile [root@home ruby-1.8.7-p72]# ---
**Author:** ![greg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/71c47a/32.png) [@greg](https://www.ruby-forum.com/u/greg)\ **Post date:** [February 7, 2009, 11:51am UTC](https://www.ruby-forum.com/t/do-i-need-ruby-libs-as-a-prerequisite-to-install-run-ruby-what-is-ruby-libs-exactly/159704/3 "2009-02-07T11:51:51Z")
Alle Saturday 07 February 2009, Greg H. ha scritto: > Hi, > If I’m downloading the ruby source to compile on my Redhat linux box, do I > need “ruby-libs” as a prerequisite? I’ve seen it referred to but not sure > what it is? > > If it does exist and I need it, where would I download the source for this > to build it (i.e. before then moving onto Ruby compile itself)? From the name, I’d say ruby-libs is a package for your distribution. If you want to build ruby from source, you don’t need it. Stefano ---
**Author:** ![greg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/71c47a/32.png) [@greg](https://www.ruby-forum.com/u/greg)\ **Post date:** [February 7, 2009, 11:58am UTC](https://www.ruby-forum.com/t/do-i-need-ruby-libs-as-a-prerequisite-to-install-run-ruby-what-is-ruby-libs-exactly/159704/4 "2009-02-07T11:58:54Z")
2009/2/7 Stefano C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > Alle Saturday 07 February 2009, Greg H. ha scritto: > > From the name, I’d say ruby-libs is a package for your distribution. If you > want to build ruby from source, you don’t need it. > > Stefano thanks - you didn’t have a look at my PS question by chance? (i.e.If I just go straight to compiling ruby I do get some “no”'s coming back for the initial “./configure”. ) ---
**Author:** ![greg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/71c47a/32.png) [@greg](https://www.ruby-forum.com/u/greg)\ **Post date:** [February 7, 2009, 12:14pm UTC](https://www.ruby-forum.com/t/do-i-need-ruby-libs-as-a-prerequisite-to-install-run-ruby-what-is-ruby-libs-exactly/159704/5 "2009-02-07T12:14:07Z")
Alle Saturday 07 February 2009, Greg H. ha scritto: > just go straight to compiling ruby I do get some “no”'s coming back for the > initial “./configure”. ) I think that they’re normal. If I remember correctly, when configure finds something wrong (for example, a missing library), it would give an error at the end. Since in your case it doesn’t, it means everything is correct. You don’t need to look at the every line configure outputs: as I said, if something is wrong, it’ll tell you at the end. Stefano