Proper way of replacing crt0.o/GCC search path for startup files
Sun May 17 14:53:00 GMT 2015
> -----Original Message-----
> From: Nicholas Clifton [mailto:firstname.lastname@example.org]
> > I have written an alternative crt0.o (the startup file placed at
> > beginning of the executable) for a bare-metal system.
> > For GCC to use this, it requires a new specs file.
> Have you considered using --nostartfiles instead ?
I think this would require getting the user to explicitly add
<gcc-startup-dir>/crti.o and <gcc-startup-dir>/crtbegin.o, in addition
to the special crt0.o, to the link, and seems more painful.
> > I was unable to find precise documentation on how GCC searches for
> > specs files and for startup files. It seems like directories added
> > -L are not searched for spec or startup files, for example. (I.e.,
> > my_crt0%o%s was not found by GCC, despite an appropriate -L
> Have you tried using -B instead of -L ?
-B seems to change a lot more things.
In any case, thanks very much for your suggestions!
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