This works fine up to httpd-2.4.26+apr-1.5.2+apr-util-1.5.4.
No I discovered that there are new apr versions available. So I tried the above procedure with apr-1.6.2 and apr-util-1.6.0 (maybe a mistake to try something.0 :-). This fails with the following messages:
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/scratch/httpd-2.4.26/srclib/apr/libtool --silent --mode=compile gcc -std=gnu99 -g -O2 -pthread -DLINUX -D_REENTRANT -D_GNU_SOURCE -I. -I/scratch/httpd-2.4.26/os/unix -I/scratch/httpd-2.4.26/include -I/scratch/httpd-2.4.26/srclib/apr/include -I/scratch/httpd-2.4.26/srclib/apr-util/include -I/opt/msc_stuff/openldap-current/include -I/scratch/httpd-2.4.26/modules/aaa -I/scratch/httpd-2.4.26/modules/cache -I/scratch/httpd-2.4.26/modules/core -I/scratch/httpd-2.4.26/modules/database -I/scratch/httpd-2.4.26/modules/filters -I/scratch/httpd-2.4.26/modules/ldap -I/scratch/httpd-2.4.26/server -I/scratch/httpd-2.4.26/modules/loggers -I/scratch/httpd-2.4.26/modules/lua -I/scratch/httpd-2.4.26/modules/proxy -I/scratch/httpd-2.4.26/modules/session -I/scratch/httpd-2.4.26/modules/ssl -I/scratch/httpd-2.4.26/modules/test -I/scratch/httpd-2.4.26/server -I/scratch/httpd-2.4.26/modules/arch/unix -I/scratch/httpd-2.4.26/modules/dav/main -I/scratch/httpd-2.4.26/modules/generators -I/scratch/httpd-2.4.26/modules/mappers -prefer-non-pic -static -c modules.c && touch modules.lo
gcc -std=gnu99 -g -O2 -pthread -DLINUX -D_REENTRANT -D_GNU_SOURCE -I. -I/scratch/httpd-2.4.26/os/unix -I/scratch/httpd-2.4.26/include -I/scratch/httpd-2.4.26/srclib/apr/include -I/scratch/httpd-2.4.26/srclib/apr-util/include -I/opt/msc_stuff/openldap-current/include -I/scratch/httpd-2.4.26/modules/aaa -I/scratch/httpd-2.4.26/modules/cache -I/scratch/httpd-2.4.26/modules/core -I/scratch/httpd-2.4.26/modules/database -I/scratch/httpd-2.4.26/modules/filters -I/scratch/httpd-2.4.26/modules/ldap -I/scratch/httpd-2.4.26/server -I/scratch/httpd-2.4.26/modules/loggers -I/scratch/httpd-2.4.26/modules/lua -I/scratch/httpd-2.4.26/modules/proxy -I/scratch/httpd-2.4.26/modules/session -I/scratch/httpd-2.4.26/modules/ssl -I/scratch/httpd-2.4.26/modules/test -I/scratch/httpd-2.4.26/server -I/scratch/httpd-2.4.26/modules/arch/unix -I/scratch/httpd-2.4.26/modules/dav/main -I/scratch/httpd-2.4.26/modules/generators -I/scratch/httpd-2.4.26/modules/mappers -c /scratch/httpd-2.4.26/server/buildmark.c
/scratch/httpd-2.4.26/srclib/apr/libtool --silent --mode=link gcc -std=gnu99 -g -O2 -pthread -L/opt/msc_stuff/openldap-current/lib -L/opt/msc_stuff/openssl-current/lib -Wl,-rpath=/opt/msc_stuff/openldap-current/lib,-rpath=/opt/msc_stuff/openssl-current/lib -o httpd modules.lo buildmark.o -export-dynamic server/
libmain.la modules/core/
libmod_so.la modules/http/
libmod_http.la os/unix/
libos.la -L/usr/lib64 -lpcre /scratch/httpd-2.4.26/srclib/apr-util/
libaprutil-1.la /scratch/httpd-2.4.26/srclib/apr/
libapr-1.la -lrt -lcrypt -lpthread -ldl
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_ParserCreate'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_GetErrorCode'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_SetUserData'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_SetDefaultHandler'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_ErrorString'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_ParserFree'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_SetElementHandler'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_Parse'
/scratch/httpd-2.4.26/srclib/apr-util/.libs/libaprutil-1.so: undefined reference to `XML_SetCharacterDataHandler'
collect2: ld returned 1 exit status
make[1]: *** [httpd] Error 1
make[1]: Leaving directory `/net/lpsdm77/fs1/scratch/httpd-2.4.26'
make: *** [all-recursive] Error 1
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Apparently apr-util no longer bundles "expat". So my question: what is the correct/intended way to work around this?
