LHAPDF the Les Houches Accord PDF Interface

• LHAPDF Home
• Publications
• Installation
• PDF sets
• Downloads
• User manual
• Theory review
• C++ wrapper
• C++ wrapper (old - v5.3))
• Python wrapper
• .LHpdf files
• .LHgrid files
• Configuration options
• Mailing list
• ChangeLog
• Subversion repo
• Contact

Compiling on Mac OS X

Because of the increasing numbers and complexity of new PDFs, from version 5.7.0 onwards the memory requirement declared by LHAPDF has exceeded 1GB! Apparently Mac OS X does not like this. A solution is to build LHAPDF in the "low memory" mode by specifying the "--enable-low-memory" option at configuration.

i.e.
configure --prefix=install/directory --enable-low-memory
make
make install

Beware however that this is fine if you are only using single PDF sets but may cause a degredation in speed if looping over errors sets.

A new version of LHAPDF is being worked on to deal with these memory issues.