Port Bug Report: PostgreSQL does not compile on ARM systems

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                        POSTGRESQL BUG REPORT TEMPLATE
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Your name        : Andrew McMurry
Your email address    : a.mcmurry1@physics.ox.ac.uk

Category        : install: compile
Severity        : critical

Summary: PostgreSQL does not compile on ARM systems

System Configuration
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  Operating System   : NetBSD/arm32 1.3-current

  PostgreSQL version : 6.4.2

  Compiler used      : ecgs-1.1.1

Hardware:
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CATS (StrongARM 110 processor), 128MB RAM

Versions of other tools:
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Problem Description:
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The PostgreSQL sources fail to compile on NetBSD/arm32
systems due to the lack of a TAS function.

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Test Case:
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Solution:
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I am sorry that this isn't a proper patch.
Add the following into src/include/storage/s_lock.h:

#if defined(__arm32__)
#define TAS(lock) tas(lock)

static __inline__ int
tas(volatile slock_t *lock)
{
        register slock_t _res = 1;

__asm__("swpb %0, %0, [%3]": "=r"(_res), "=m"(*lock):"0"(_res), "r" (lock));
        return (int) _res;
}

#endif   /* __arm32__ */


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