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web2c: IPC and TeX

 
 5.6 IPC and TeX
 ===============
 
 (If anyone uses this feature and needs documentation, write
 <tex-k@tug.org>.)
 
    This functionality is available only if the '--enable-ipc' option was
 specified to 'configure' during installation of Web2c (⇒
 Installation).
 
    If you define 'IPC_DEBUG' before compilation (e.g., with 'make
 XCFLAGS=-DIPC_DEBUG'), TeX will print messages to standard error about
 its socket operations.  This may be helpful if you are, well, debugging.
 

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