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Subject: Re: Any help with a gcc command line?
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Date: Sun, 13 Jul 2025 15:34:01 +0200
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To: Fergus Daly <fergusd84 AT outlook DOT com>
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From: Dimitry Andric via Cygwin <cygwin AT cygwin DOT com>
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On 13 Jul 2025, at 10:10, Fergus Daly via Cygwin <cygwin AT cygwin DOT com> wrote:
> 
> Sorry - this is very person- rather than Cygwin-specific, but any insight would be greatly appreciated.
> In Cygwin and for many years I have compiled an executable myx.exe from source and then re-compiled it
> as the need arises when revised or new {source}/*.c occur.
> After creating the archive myx0.a the key gcc command line is
> $ gcc -w -static -o myx -O3 ./myx0.a -lreadline -lncurses -lm
> This worked flawlessly up to and including readline-8.1.2 but failed with 8.2.2 and this week's latest update to 8.3.1.

What's the exact error message you are getting?


> To get the compilation to work it is (thank Goodness) not necessary to revert entirely to 8.1.2. I simply
> temporarily utilise the single previous file /lib/libreadline.a and then recover the current version. So the key
> command now reads (3 lines not 1)
> $ cp -v /lib/libreadline.8.1.2.a /lib/libreadline.a            # grab the old working file                  
> $ gcc -w -static -o sc -O3 ./clib.a -lreadline -lncurses -lm  # i.e. UNCHANGED
> $ cp -v /lib/libreadline.8.3.1.a /lib/libreadline.a            # recover the current file
> But I don't much like messing about within /lib/ and would like to avoid this intrusion if I can.

Instead of doing this, it might be handier to figure out what the root cause of the failure is. In this particular case, I think the newer version of libreadline requires some additional libraries to be passed on the link command line, at least for static linking.

-Dimitry


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