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From: Thomas Jahns <jahns@idontlikespam.dkrz.de>
Newsgroups: comp.lang.fortran
Subject: flang-new shared object linking
Date: Thu, 7 Nov 2024 13:41:59 +0100
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Please excuse my asking about something that's not strictly Fortran the language 
but rather a very specific implementation. I figured this might be the place to 
find someone knowledgeable about this.

I've tried out the flang-new component of llvm 18.1.6 recently, but stumbled 
when building a shared library on RHEL 8 Linux: the library code from 
libFortranRuntime.a and libFortranDecimal.a is always pulled into the shared 
object. That probably is fine for a library intended to be used from other 
language code as a plugin for e.g. Python but rather impractical for a library 
meant to be used from a binary also built with flang-new. Besides adding 
unnecessary code to the build that also sets up everything needed for a later 
version conflict when the library built with an older version of flang-new is 
used by a program built with a newer version.

I can't seem to make flang-new stop pulling its run-time library into the shared 
library, specifically the options -nostdlib and -nodefaultlibs seem to be 
non-working for flang-new.

If anyone knows how to solve this problem, please give a hint.

Thomas