Hi again,
As a followup - I ran this command (do I need to set LD_LIBRARY_PATH?)
[pol@polhost /]$ sudo find . -name "icu*" | grep -v Downloads | more
And got:
./usr/local/sbin/icupkg
./usr/local/bin/icuinfo
./usr/local/bin/icu-config
./usr/local/lib/icu
./usr/local/lib/pkgconfig/icu-io.pc
./usr/local/lib/pkgconfig/icu-uc.pc
./usr/local/lib/pkgconfig/icu-i18n.pc
./usr/local/share/icu
./usr/local/share/man/man8/icupkg.8
./usr/local/share/man/man1/icu-config.1
./usr/local/include/unicode/icuplug.h
./usr/local/include/unicode/icudataver.h
./usr/bin/icuinfo
./usr/bin/icu-config-64
./usr/bin/icu-config
./usr/lib64/icu
./usr/lib64/pkgconfig/icu-io.pc
./usr/lib64/pkgconfig/icu-uc.pc
./usr/lib64/pkgconfig/icu-i18n.pc
./usr/lib/jvm/java-10-openjdk-10.0.1.10-3.fc28.x86_64/legal/java.base/icu.md
./usr/share/maven-metadata/icu4j.xml
./usr/share/icu
./usr/share/licenses/icu4j
./usr/share/jython/javalib/icu4j_icu4j.jar
./usr/share/maven-poms/icu4j
./usr/share/maven-poms/icu4j/icu4j.pom
./usr/share/java/icu4j
./usr/share/java/icu4j/icu4j.jar
./usr/share/doc/icu4j
./usr/share/man/man1/icu-config.1.gz
./usr/share/man/man1/icuinfo.1.gz
./usr/include/boost/regex/icu.hpp
./usr/include/unicode/icuplug.h
./usr/include/unicode/icudataver.h
[pol@polhost /]$
It seems that the library was installed, but the PostgreSQL make
command can't "see" the libs?