"Jose Fco. Mojada" <jfmojada@yahoo.es> writes:
> As an example, we take the attempt to install the "orafce" extension in
> the new system, although it is not the only one in which this happens.
> When installing, we get the following error:
> /usr/pgsql-16/include/server/utils/pg_locale.h:19:10: fatal error:
> unicode/ucol.h: No such file or directory
> 19 | #include <unicode/ucol.h>
> | ^~~~~~~~~~~~~~~~
On my Red Hat system, /usr/include/unicode/ucol.h is provided by
libicu-devel. You need to install that package, not only the
base libicu package, to compile anything that uses libicu.
regards, tom lane