ITEM: E3130L

xlc complains against static fun. decl. within fun.

Question:

I have an RS/6000 running 3.2.4 and am trying to port some C code to
it from SUN and HP.  There are instances in my code where a function
is declared as static within another function.  HP and SUN compilers
didn't complain about this, but xlc does.  When I remove this
declaration from within the function and declare it globally (i.e. I
make a global declaration for a static function) it works fine.  Why
does this happen?

Response:

xlc is a strict ANSI compiler.  According to section 3.5.1 of the 
C ANSI X3.159-1989 standard,  "The declaration of an identifier for a function
that has block scope shall have no explicit storage-class specifier other than
extern."  Anything declared inside a function has block scope, so you can't use
the static storage-class specifier on a nested function declaration.  There are
two ways to get rid of the error:

        1. Move the static function declarations out of the enclosing function
           so they are at file scope.

        2. Remove the static storage-class specifier from all declarations and
           from the definition.

Since xlc is a strict ANSI compiler, there is no compiler option to get around
this problem.



Support Line: xlc complains against static fun. decl. within fun. ITEM: E3130L

Dated: October 1993 Category: N/A

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