Recent Features
| |||||||||||||
Zeuthen: Writing a C library, part 2Zeuthen: Writing a C library, part 2Posted Jul 3, 2011 6:30 UTC (Sun) by cmccabe (guest, #60281)In reply to: Zeuthen: Writing a C library, part 2 by hmh Parent article: Zeuthen: Writing a C library, part 1
> And you will want to use the linker symbol versioning instead of static
> versioning, otherwise, you'd break the API all the time. BTW, it is not a > gcc thing, it is an ELF thing, and Solaris has been doing it since forever.
from http://www.airs.com/blog/archives/220
> Ulrich Drepper and Eric Youngdale introduced a much more sophisticated
In other words, this is a gcc-specific ELF extension. I wonder if LLVM supports it yet? I found a page from 2008 that said that LLVM didn't have support for this yet, but then I got tired of using the Google.
(Log in to post comments)
Zeuthen: Writing a C library, part 2 Posted Jul 3, 2011 9:39 UTC (Sun) by nix (subscriber, #2304) [Link]
Yes, its a Linuxism (and very much more useful than Solaris symbol versions), but a lot of the syntax of the file, and the underlying idea, was a Solarisism first.
Zeuthen: Writing a C library, part 2 Posted Jul 3, 2011 17:07 UTC (Sun) by paulj (subscriber, #341) [Link]
Symbol map files are supported by several proprietary Unix toolchains, including Suns' and (iirc) HPs'. The syntax is nearly identical twixt Solaris and GNU (there's certainly a useful common subset iirc). The ELF symbol stuff is at least very very similar in concept. It might even be standardised, and/or tools may know the differing formats. Binary compatibility across different OSes tends not to be the most important of issues though..
Zeuthen: Writing a C library, part 2 Posted Jul 6, 2011 15:54 UTC (Wed) by jwakely (subscriber, #60262) [Link]
> In other words, this is a gcc-specific ELF extension.
It's not gcc-specific, it's done by GNU binutils not gcc
http://sourceware.org/binutils/docs-2.21/as/Symver.html
|
|||||||||||||