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The tale of -mrtd in GCC and Clang
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John Paul Adrian Glaubitz
May 7, 2023, 5:10:04 AM5/7/23
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Good Morning!
While working on the RTD issue in the M68k backend in LLVM, Min dug a bit into
the hisstory of the "-mrtd" flag in GCC and Clang and turns out it's actually
much more interesting than we first thought.
See: https://m680x0.github.io/blog/2023/05/the-tale-of-mrtd.html
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
While working on the RTD issue in the M68k backend in LLVM, Min dug a bit into
the hisstory of the "-mrtd" flag in GCC and Clang and turns out it's actually
much more interesting than we first thought.
See: https://m680x0.github.io/blog/2023/05/the-tale-of-mrtd.html
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
Richard Z
May 10, 2023, 11:00:05 AM5/10/23
to
Hi,
very interesting. Somewhere deep in my memory I have the idea that the mrtd option or rtd instruction was designed for Modula 2 which was modern at that time. It was probably pretty useless for a classical K&R c compiler that didn't even understand prototypes until 1989 or so... I assume GCC -mrtd predated c prototypes.
Richard
very interesting. Somewhere deep in my memory I have the idea that the mrtd option or rtd instruction was designed for Modula 2 which was modern at that time. It was probably pretty useless for a classical K&R c compiler that didn't even understand prototypes until 1989 or so... I assume GCC -mrtd predated c prototypes.
Richard
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