Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
When you build ImageMagick from source you must first install any delegate libraries and their headers before you run the configure script. Install the JPEG delegate library and its headers so that jpeg.h is on your system. Under Linux, for example, you need to install libjpeg and libjpeg-devel. Next, run the ImageMagick configure script and review the last 30-40 lines of output. Make sure the output shows that the JPEG library was found and validated. Now build and install ImageMagick and you will have support for JPEG images.