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docs: Clarify that G_GNUC_UNUSED can’t be used on definitions

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Only on declarations.

This has now bitten me multiple times.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>
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Philip Withnall 2024-07-20 19:11:13 +02:00
parent 107b47226c
commit 0b8f69b28a
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docs/reference/glib/macros.md
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@ -276,7 +276,8 @@ by application programmers.
It avoids possible compiler warnings.
For functions, place the attribute after the declaration, just before the
semicolon. For arguments, place the attribute at the beginning of the
semicolon. It cannot go in the definition of a function, only the
declaration. For arguments, place the attribute at the beginning of the
argument declaration.
void my_unused_function (G_GNUC_UNUSED gint unused_argument,