I've tried to install jlibcpp-0.7, 0.6 and other older versions of jlibcpp and found several problems:
1) jcommon/include/* files have broken permissions and cannot be installed under non-root user
ls -l jcommon/include/
chmod +x jcommon/include/ -R
2) make install PREFIX=<path> installs headers to /usr/local always:
sed -e 's/\/usr\/local\//\$\(PREFIX\)\//g' Makefile > Makefile.1 && mv Makefile.1 Makefile
3) make errors:
Instaling include files in /home/andrey/upstream-tracker/testing/jlibcpp/0.7/include/jlibcpp OK
Instaling libjlibcpp-0.7.so in /home/andrey/upstream-tracker/testing/jlibcpp/0.7/lib/libjlibcpp.so OK
ln: accessing `/home/andrey/upstream-tracker/testing/jlibcpp/0.7/lib/libjlibcpp.so': Not a directory
The issue is that it creates a shared file "lib" instead of directory "lib/" in the installation directory.
I'll add a new version from jlibcpp (jlibcpp-1.0) next week with some bugfixes (including the problems of permissions).