gcc cross compiler for PDP-11
Fred N. van Kempen wrote:
>On Sat, 31 Jan 2004, Brad Parker wrote:
>
>
>
>>concerning gcc/binuils & pdp-11
>>
>>- gcc's (3.3.2) backend generates "unix" style asm
>>- gas wants "gas" style asm and doesn't like the "unix" style asm
>>- the pdp-11 gcc maintainer knows this and has some fixes which he's
>> going to release soon
>>
>>
>
>GCC version 3.x generates code that, um, sucks. For most C-based
>programming, there is absolutely no reason to "upgrade" beyond the
>older (V2.95.3) release, which works fine with the pdp11 backend.
>
>
>
>>You can't simply cross compile the "as" from 2.11BSD because it's
>>written in assembler. (but it sure looks like it was C at point)
>>
>>
>No, UNIX as was always written in assembler, although they did use
>some tools to clean it up later on. Later (non-PDP11) versions were
>in C, obviously.
>
>--f
>
>
>
>
Are you sure? I was working in UNIX in 1980 and the 11/23 port was
definitely C.
Maybe ASM earlier? It must have been a narrow window, The machine at OMSI,
the 11/45 was running RSTS. Some of the guys, Barry White and Jim Bacchus
were booting the maching with some "new" OS late at night., this was in
1972.. UNIX?
Jim Davis.
Received on Tue Feb 03 2004 - 07:27:27 GMT
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