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Date: Fri, 29 Apr 2022 18:43:29 -0700 (PDT)
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Subject: Trouble building with gnatcoll
From: John Perry <devotus@yahoo.com>
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Hello

I tried to build something with GnatColl from GPS Community 2021 on Fedora 35. The linker failed, saying 

   ld: /home/cantanima/common/Ada/Quoter/obj/gnatcoll-refcount.o: in function `gnatcoll__refcount__sync_bool_compare_and_swap':
   gnatcoll-refcount.adb:(.text+0x622): undefined reference to `gnatcoll_sync_bool_compare_and_swap_access'
collect2: error: ld returned 1 exit status 

I can fix this from the command line by copying the failed command and adding ~/opt/GNAT/2021/include/gnatcoll/gnatcoll_support.c to the list of things to compile, as that's the included file with the desired function. That's awfully inconvenient, though.

I guess I have something configured slightly wrong. Might anyone here have an idea?

(Also posting to StackOverflow.)

john perry