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Re: configure 'ncurses' when it is set '-flto' in CFLAGS, CXXFLAGS and L

From: Denis Pronin
Subject: Re: configure 'ncurses' when it is set '-flto' in CFLAGS, CXXFLAGS and LDFLAGS
Date: Thu, 04 Oct 2018 11:24:36 +0300

maybe I could suggest you a patch to the 'configure' script? or you will do it 
I would suggest that you should somehow use 'dlsym' in the first conftest.c, 
correctly, with the right interface of dlsym, from dlfct.h. This shall prevent 
the linker, in 'flto' mode, from throwing 'dlsym' away for it not having been 

04.10.2018, 11:18, "Thomas Dickey" <address@hidden>:
> On Thu, Oct 04, 2018 at 10:46:57AM +0300, Denis Pronin wrote:
>>  I am sorry. Something weird happened when I was sending to you an email, my
>>  email client had unexpectedly quit and I got confused whether the email was
>>  sent; I resent you the other email where briefly told you what's been going
>>  on. There a link has been, take a look
> I saw it.
>>  As I understood it would be nice if you regenerate configure with a fresh
>>  version of 'autoconf'
> that would be unlikely to solve this problem: at the time, I compared against
> "fresh" autoconf, and its stub code did not fix the configuration that I was
> interested in, nor did it improve a few related problems with weak symbols
> on other platforms.
> I'll take both into account (thanks)
>>  04.10.2018, 03:12, "Thomas Dickey" <address@hidden>:
>>  > On Wed, Oct 03, 2018 at 11:20:15PM +0300, Denis Pronin wrote:
>>  >>  Hi,
>>  >>
>>  >>  I work on gentoo linux, where CC, CXX, CFLAGS, CXXFLAGS, LDFLAGS are
>>  >>  exposed to ./configure script of ncurses library. As 'configure' goes
>>  >>  it checks whether it is supported linkage to dl*() functions. CFLAGS,
>>  >>  CXXFLAGS and LDFLAGS contains '-flto' flag standing for 'link time
>>  >>  optimization' taking place when compiling and linking against libraries
>>  >>  and object files
>>  >>
>>  >>  ./configure verifies support of dl*() functions by compiling the FIRST
>>  >>  conftest.c looking like:
>>  >
>>  > thanks (I'll investigate - the discussion in the bug report was not 
>> useful)
> --
> Thomas E. Dickey <address@hidden>
> https://invisible-island.net
> ftp://ftp.invisible-island.net

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