Bug #60491 for Imager: [PATCH] libpng probe/test fails with non-standard location

I have installed libraries and modules into a separate prefix for a website I am developing. When I try to install Imager using a libpng that is in a non-standard location (directory) Makefile.PL fails to probe libpng and returns an error. I also noticed pkg-config could not find png's information. This is because pkg-config's data-files are also in the non-standard location, in the $PREFIX/lib/pkgconfig/ directory. I will paste the example problem output and attach a patch for lib/Imager/Probe.pm, which PNG/Makefile.PL uses. EXAMPLE OUTPUT (BEFORE PATCH) [juster@artemis Imager]$ perl Makefile.PL --incpath $PREFIX/include --libpath $PREFIX/lib done. gif: includes found - libraries found ungif: includes found - libraries not found jpeg: includes found - libraries found tiff: includes found - libraries found freetype2: includes not found - libraries not found freetype2: not available T1-fonts: includes not found - libraries not found TT-fonts: includes not found - libraries not found w32: includes not found - libraries not found EXIF support enabled Checking if your kit is complete... Looks good Writing Makefile for Imager::CountColor Writing Makefile for Imager::Filter::DynTest Writing Makefile for Imager::Filter::Flines Writing Makefile for Imager::File::ICO Writing Makefile for Imager::Filter::Mandelbrot PNG: Not found via pkg-config PNG: includes found - libraries found /home/juster/build/Imager/PNG/assertlibPEXHoAxI: error while loading shared libraries: libpng14.so.14: cannot open shared object file: No such file or directory PNG: Test code failed: wrong result: 'png' Writing Makefile for Imager::File::SGI Writing Makefile for Imager::plugins Writing Makefile for Imager [juster@artemis Imager]$ EXAMPLE OUTPUT (AFTER PATCH) [juster@artemis Imager.patched]$ perl Makefile.PL --incpath $PREFIX/include --libpath $PREFIX/lib done. gif: includes found - libraries found ungif: includes found - libraries not found jpeg: includes found - libraries found tiff: includes found - libraries found freetype2: includes not found - libraries not found freetype2: not available T1-fonts: includes not found - libraries not found TT-fonts: includes not found - libraries not found w32: includes not found - libraries not found EXIF support enabled Writing Makefile for Imager::CountColor Writing Makefile for Imager::Filter::DynTest Writing Makefile for Imager::Filter::Flines Writing Makefile for Imager::File::ICO Writing Makefile for Imager::Filter::Mandelbrot PNG: Found via pkg-config libpng14 PNG: library version 10402, header version 10402 PNG: Passed code check Writing Makefile for Imager::File::PNG Writing Makefile for Imager::File::SGI Writing Makefile for Imager::plugins Writing Makefile for Imager [juster@artemis Imager.patched]$ The patch that I used is attached to this email. There was a typo in Imager::Probe which never allowed LD_RUN_PATH to be set. I have also allowed pkg-config to search non-standard locations by setting the PKG_CONFIG_PATH environment variable. Thanks, Justin