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[DotGNU] Only 1 error stopping build on Mac OS X with gcc 4.0

From: Alan West
Subject: [DotGNU] Only 1 error stopping build on Mac OS X with gcc 4.0
Date: Tue, 19 Jul 2005 16:32:15 +0100

A while back when I was building Portable .NET on a Mac just for the fun of it, I came across an error when using apple's gcc 4.0.0.

As I wasn't using the CVS source I didn't mention it. Now I am building the CVS version of the source and the error is there.

There was only one error stopping it from building in gcc 4.0..

I changed os_dep.c:2215, replacing the extern with static and everything was fine.

os_dep.c:3410: error: static declaration of 'GC_task_self' follows non-static declaration
os_dep.c:2215: error: previous declaration of 'GC_task_self' was here

# ifdef DARWIN
/* Using vm_protect (mach syscall) over mprotect (BSD syscall) seems to decrease the likelihood of some of the problems described below. */
    #include <mach/vm_map.h>
    extern mach_port_t GC_task_self;   <---- os_dep.c:2215
    #define PROTECT(addr,len) \
if(vm_protect(GC_task_self,(vm_address_t)(addr),(vm_size_t) (len), \
                FALSE,VM_PROT_READ) != KERN_SUCCESS) { \
            ABORT("vm_portect failed"); \
    #define UNPROTECT(addr,len) \
if(vm_protect(GC_task_self,(vm_address_t)(addr),(vm_size_t) (len), \
            ABORT("vm_portect failed"); \
# else

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