bug#40793: closed (Documentation suggestion)

[GNU bug Tracking System]

Your message dated Fri, 15 Mar 2024 19:48:00 +0200
with message-id <3398abaf-4792-4137-9894-a88711142981@gmail.com>
and subject line Re: Documentation suggestion
has caused the debbugs.gnu.org bug report #40793,
regarding Documentation suggestion
to be marked as done.

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-- 
40793: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=40793
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--- Begin Message --- Subject: Documentation suggestion Date: Thu, 23 Apr 2020 13:15:30 +0100

libtool.texi contains the following:

"It was reported that GNU/Linux's glibc 2.0's 'dlopen' with 'RTLD_LAZY' (that libltdl uses by default) is not thread-safe, but this problem is supposed to be fixed in glibc 2.1.  On the other hand, 'RTLD_NOW' was reported to introduce problems in multi-threaded applications on FreeBSD."

I suggest removing this material: glibc 2.1 was released over 20 years ago. I have looked through both the glibc changelogs and git history to try to ascertain whether in fact this bug was mentioned as being fixed, but I can find nothing relevant. The same applies to the FreeBSD case.

Evidence on the positive side is that dlopen(3) states explicitly that the function is thread safe, and POSIX defines it as such. Therefore it might be reasonable to state that modern dlopen implementations should be threads safe. Or it might not. (Does someone know more about this?) In the latter case, the rest of the paragraph could be left as-is, which is to say, reasonably conservative.

--

https://rrt.sc3d.org

--- End Message ---

--- Begin Message --- Subject: Re: Documentation suggestion Date: Fri, 15 Mar 2024 19:48:00 +0200 User-agent: Mozilla Thunderbird

Thank you for your bug report! I have removed the warnings about
thread safety with 'dlopen' in libtool's documentation.

--
Ileana Dumitrescu

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