Sorry, I was confused. Repeated it so many times that I got a bit lost. Here is what happens:

./configure seems to work

make produces some warnings and errors:

configure.ac:16: error: possibly undefined macro: AC_SUBST
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.ac:41: error: possibly undefined macro: AC_MSG_WARN
make: *** [Makefile:651: configure] Fehler 1

ignoring these, sudo make install produces the aforementioned error:

configure: WARNING: libjasper not found
./configure: line 12807: syntax error near unexpected token `ZLIB,zlib,'
./configure: line 12807: ` PKG_CHECK_MODULES(ZLIB,zlib,'
make: *** [Makefile:648: config.status] Fehler 2

Thanks! Jan