Re: HEADS UP: cvs commit: src/lib/libftpio Makefile (fwd)
"David O'Brien" wrote: > On Thu, Jul 06, 2000 at 06:05:50PM -0700, Peter Wemm wrote: > > This is *not* the same as the a.out behavior which searched directories to > > find the largest number. ELF uses the symlinks and no searching, which is > > why ld and ld-elf.so is faster when locating directories and does not need > > ldconfig or the ld.so.cache. > > Correct me if I am wrong, ld-elf.so does still need ldconfig. And > ld-elf.so does not use the symlink (if it did compat libs would not > work). The ELF ldconfig does nothing except set the default search path for finding libraries: peter@t8000[12:54am]~-183> hd /var/run/ld-elf.so.hints 45 68 6e 74 01 00 00 00 80 00 00 00 37 00 00 00 |Ehnt7...| 0010 00 00 00 00 36 00 00 00 00 00 00 00 00 00 00 00 |6...| 0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 || * 0080 2f 75 73 72 2f 6c 69 62 3a 2f 75 73 72 2f 6c 69 |/usr/lib:/usr/li| 0090 62 2f 63 6f 6d 70 61 74 3a 2f 75 73 72 2f 58 31 |b/compat:/usr/X1| 00a0 31 52 36 2f 6c 69 62 3a 2f 75 73 72 2f 6c 6f 63 |1R6/lib:/usr/loc| 00b0 61 6c 2f 6c 69 62 00 |al/lib.| ld(1) resolves the symlinks. ld-elf.so.1 searches for the full filename in the directory path from ldconfig -elf. objdump --all-headers /usr/bin/vi: ... Dynamic Section: NEEDED libncurses.so.5 NEEDED libc.so.4 .. All ld-elf.so.1 has to do is look for the first one of: /usr/lib/libc.so.4 /usr/lib/compat/libc.so.4 /usr/X11R6/lib/libc.so.4 /usr/local/lib/libc.so.4 This is just done with a series of open(2) calls and is very cheap. The first one it can open it uses. Cheers, -Peter -- Peter Wemm - [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: HEADS UP: cvs commit: src/lib/libftpio Makefile (fwd)
On Thu, Jul 06, 2000 at 06:05:50PM -0700, Peter Wemm wrote: > This is *not* the same as the a.out behavior which searched directories to > find the largest number. ELF uses the symlinks and no searching, which is > why ld and ld-elf.so is faster when locating directories and does not need > ldconfig or the ld.so.cache. Correct me if I am wrong, ld-elf.so does still need ldconfig. And ld-elf.so does not use the symlink (if it did compat libs would not work). -- -- David ([EMAIL PROTECTED]) To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: HEADS UP: cvs commit: src/lib/libftpio Makefile (fwd)
Kris Kennaway wrote: > If anyone has done a make world within the past few days you should remove > your libftpio.6 since the version bump was made in error. It's now back to > libftpio.5. It actually does not matter. Which major version new programs are linked against is controlled by which file the symlinks point to. peter@t8000[6:01pm]/usr/lib-113> ls -l libftpio.so* lrwxr-xr-x 1 root wheel 13 Jun 28 12:49 libftpio.so@ -> libftpio.so.5 -r--r--r-- 1 root wheel 14680 Jun 10 20:14 libftpio.so.5 -r--r--r-- 1 root wheel 17244 Jun 5 19:43 libftpio.so.6 -lftpio will follow the symlink, and read the headers in libftpio.so.5: 8000# objdump --all-headers /usr/lib/libftpio.so | grep SONAME SONAME libftpio.so.5 As a result, all programs linked with '-lftpio' will end up linking against libftpio.so.5 explicitly. This is *not* the same as the a.out behavior which searched directories to find the largest number. ELF uses the symlinks and no searching, which is why ld and ld-elf.so is faster when locating directories and does not need ldconfig or the ld.so.cache. Cheers, -Peter -- Peter Wemm - [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
HEADS UP: cvs commit: src/lib/libftpio Makefile (fwd)
If anyone has done a make world within the past few days you should remove your libftpio.6 since the version bump was made in error. It's now back to libftpio.5. Kris -- In God we Trust -- all others must submit an X.509 certificate. -- Charles Forsythe <[EMAIL PROTECTED]> -- Forwarded message -- Date: Thu, 6 Jul 2000 13:19:02 -0700 (PDT) From: Hajimu UMEMOTO <[EMAIL PROTECTED]> To: [EMAIL PROTECTED], [EMAIL PROTECTED] Subject: cvs commit: src/lib/libftpio Makefile ume 2000/07/06 13:19:02 PDT Modified files: lib/libftpio Makefile Log: Reduce shlib major that is bumped by my mistake. We don't need bumping it in this time. Revision ChangesPath 1.11 +2 -2 src/lib/libftpio/Makefile To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message