Re: Semantic difference of source files

John wrote:


> [Good point. I hear that GCC can no longer compile itself
> on mainframe IBM 360 MVS because it doesn't fit. -John]


The Hercules group now has an emulator for S/380, a system that IBM
never created, just to get around that.


It allows one task to have 31 bit addresses and to allocate memory
past 16M, while running a 24 bit address space OS.


There was also discussion about extended addressing for the PDP-10,
and the possibility of porting gcc.


The IBM PL/I (F) compiler is supposed to fit into 44K (64K machine,
20K for OS/360 PCP). It will put the symbol table on disk if
necessary. The compiler itself is a dynamic overlay, parts brought
into memory only when needed. There are 254 separately assembled and
link-edited files with 374846 lines of assembly code.


-- glen
[Fortran H fit into 256K and did some serious, even by modern standards,
optimization. -John]

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