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Commitb46d9be

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With ancient gcc, skip pg_attribute_printf() on function pointer.
Buildfarm results show that the ability to attach pg_attribute_printfdecoration to a function pointer appeared somewhere between gcc 2.95.3and gcc 4.0.1. Guess that it was there in 4.0.
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‎src/bin/psql/psqlscan.h

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@@ -32,7 +32,12 @@ typedef struct PsqlScanCallbacks
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/* This pointer can be NULL if no variable substitution is wanted */
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char*(*get_variable) (constchar*varname,boolescape,boolas_ident);
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/* Print an error message someplace appropriate */
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/* (very old gcc versions don't support attributes on function pointers) */
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#if defined(__GNUC__)&&__GNUC__<4
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void(*write_error) (constchar*fmt,...);
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#else
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void(*write_error) (constchar*fmt,...)pg_attribute_printf(1,2);
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#endif
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}PsqlScanCallbacks;
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