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Date: Thu, 28 Nov 2002 16:28:00 -0000
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Subject: c/8661: GCC 3.2 don't produces builtin code for __builtin_alloca
X-SW-Source: 2002-11/txt/msg01131.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         8661
>Category:       c
>Synopsis:       GCC 3.2 don't produces builtin code for __builtin_alloca
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Wed Nov 20 11:36:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Benjamin Kalytta
>Release:        GCC 3.x
>Organization:
>Environment:
x86 cygwin (windows 2000 prof)
>Description:
GCC don't produces alloca builtin function if the file is just compiled with switch "gcc -c".

#define alloca(x)	__builtin_alloca(x)

GCC will produce an external "_alloca" symbol.
I think this should be fixed.
whereas gcc test.c will work and don't produces external symbol. (symbol into cygwin.dll or other libc libraries)
>How-To-Repeat:
gcc -c test.c
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="test.c"
Content-Disposition: inline; filename="test.c"

#define alloca(x)	__builtin_alloca(x)

unsigned int m() {
	void * n=alloca(16);
}