Photon Application Builder (PhAB)
The format for the library callbacks file is as follows:
l=library_name L=path f=function1 f=function2 l=another_library_name f=function3 f=function4 f=function5
Lines beginning with l= specify the library in which to find the following functions; if no library specification is given, the function specifications are ignored. The L=path specification line is optional, it tells the linker where to look for the library callbacks; if you don't specify this path, the linker will use its default path.
In addition to functions in the library callbacks file, the linker looks in the application directory (the directory containing abapp.dfn) for libcalls.def. Callbacks found in libcalls.def will be available only while the application is loaded.
If you're using NFS or SMB, you should start PhAB with the -n option because you can't lock files with either.
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The appbuilder utility starts the Photon Application Builder (PhAB). For information about using PhAB to develop Photon applications, see the Photon Programmer's Guide.