Make configure more verbose. PKG_CHECK_EXISTS does not print any messages, so if a library wasn't found using that tests, we wouldn't hear about it.  PKG_CHECK_MODULES by default exits when a package isn't found, but by supplying an ACTION-IF-FOUND parameter, we control whether or not it exits.  And it *does* print messages about finding or not finding a library. So we now use PKG_CHECK_MODULES exclusively.
Make configure more verbose.
PKG_CHECK_EXISTS does not print any messages, so if a library wasn't
found using that tests, we wouldn't hear about it.  PKG_CHECK_MODULES
by default exits when a package isn't found, but by supplying an
ACTION-IF-FOUND parameter, we control whether or not it exits.  And it
*does* print messages about finding or not finding a library.
So we now use PKG_CHECK_MODULES exclusively.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb