Compilation Issue with mapnik-3.0.19

[tthh7]

I encountered the following issue while compiling mapnik-3.0.19 on Ubuntu 18.04:

“/usr/bin/ld: cannot find -lboost_filesystem
/usr/bin/ld: cannot find -lboost_regex
/usr/bin/ld: cannot find -lcairo
/usr/bin/ld: cannot find -lpng
/usr/bin/ld: cannot find -lproj
/usr/bin/ld: cannot find -ltiff
/usr/bin/ld: cannot find -lwebp
/usr/bin/ld: cannot find -licui18n
/usr/bin/ld: cannot find -lboost_system
/usr/bin/ld: cannot find -lharfbuzz
/usr/bin/ld: cannot find -ljpeg
/usr/bin/ld: cannot find -licuuc
/usr/bin/ld: cannot find -lfreetype
/usr/bin/ld: cannot find -licudata"

I want to compile Mapnik using my own compiled third-party libraries, so I specified the paths for these libraries as follows:

./configure PREFIX=/usr/local/third_party BOOST_INCLUDES=/usr/local/third_party/include BOOST_LIBS=/usr/local/third_party/lib CAIRO_INCLUDES=/usr/local/third_party/include CAIRO_LIBS=/usr/local/third_party/lib PNG_INCLUDES=/usr/local/third_party/include PNG_LIBS=/usr/local/third_party/lib PROJ_INCLUDES=/usr/local/third_party/include PROJ_LIBS=/usr/local/third_party/lib TIFF_INCLUDES=/usr/local/third_party/include TIFF_LIBS=/usr/local/third_party/lib WEBP_INCLUDES=/usr/local/third_party/include WEBP_LIBS=/usr/local/third_party/lib HARFBUZZ_INCLUDES=/usr/local/third_party/include HARFBUZZ_LIBS=/usr/local/third_party/lib JPEG_INCLUDES=/usr/local/third_party/include JPEG_LIBS=/usr/local/third_party/lib FREETYPE_INCLUDES=/usr/local/third_party/include FREETYPE_LIBS=/usr/local/third_party/lib

This configuration process was successful, but when compiling later, it doesn't seem to find the relevant libraries in the specified locations.

How can I resolve this issue?

[tthh7]

I think I should be able to resolve this issue by adding the library path to the build .py script.