Public bug reported:

When compiling software using speech-tools, LLVM Clang gives errors regarding 
invalid friend declarations:
/usr/include/estools/EST_String.h:576:16: error: friend declaration specifying 
a default argument must be a definition

The reason is, that the standard does only allow friend declarations
with default arguments if these also are definitions. GCC is a bit
forgiving and ignored this issue up to now.

A workaround with minimal change would be to replace the default
arguments by overloading. Please find an according patch attached to
this report.

** Affects: speech-tools (Ubuntu)
     Importance: Undecided
         Status: New

** Patch added: "fix-friend-declarations.patch"
   
https://bugs.launchpad.net/bugs/1358266/+attachment/4180534/+files/fix-friend-declarations.patch

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https://bugs.launchpad.net/bugs/1358266

Title:
  Does not compile with llvm clang due to invalid friend declarations

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