I have recently been using the gnatcoll library on CentOS 7 and Debian 9, the installation process for both operating systems has been the same.
When I attempt this install on CentOS 8, I recieve the following error msg:
[lloyd@localhost sql]$ PATH=/home/lloyd/opt/GNAT/2020/bin:$PATH
[lloyd@localhost sql]$ make setup
[lloyd@localhost sql]$ make
gprbuild -p -m --target=x86_64-linux -j0 -XGNATCOLL_VERSION=0.0 -XBUILD=PROD -XLIBRARY_TYPE=static -XXMLADA_BUILD=static -XGPR_BUILD=static \
gnatcoll_sql.gpr
Compile
[Ada] gnatcoll-sql_impl.adb
[Ada] gnatcoll-sql_fields.adb
[Ada] gnatcoll-sql.adb
[Ada] gnatcoll-sql-orm.adb
gnatcoll-sql_impl.adb:1679:44: "UTC_Time_Offset" is not visible (more references follow)
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-catizo.ads:28
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-calend.ads:403
gnatcoll-sql_impl.adb:1679:44: "UTC_Time_Offset" is not visible (more references follow)
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-catizo.ads:28
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-calend.ads:403
gnatcoll-sql_impl.adb:1679:44: "UTC_Time_Offset" is not visible (more references follow)
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-catizo.ads:28
gnatcoll-sql_impl.adb:1679:44: non-visible declaration at a-calend.ads:403
compilation of gnatcoll-sql.adb failed
compilation of gnatcoll-sql_fields.adb failed
compilation of gnatcoll-sql_impl.adb failed
gprbuild: *** compilation phase failed
make: *** [Makefile:116: build-static] Error 4
[lloyd@localhost sql]$ gcc --version
gcc (GCC) 9.3.1 20200430 (for GNAT Community 2020 20200818)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
See your AdaCore support agreement for details of warranty and support.
If you do not have a current support agreement, then there is absolutely
no warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.
Any advice on how to resolve this issue and install the library would be much appreciated.
Thanks, Lloyd
My former answer was slightly off: so you can't build it with GNAT CE 2020 out-of-the-box as the version of GNATCOLL-core that ships with GNAT CE 2020 is behind. GNATCOLL-db depends on GNATCOLL-core, and the latter has been updated.
So, you first have to build and install the updated GNATCOLL-core and then build GNATCOLL-db. However still, if you're in a hurry, you can also checkout and build a slightly older branch (e.g. 20.2).