URL:
<http://savannah.nongnu.org/bugs/?38135>
Summary: Install a dummy stdfix-avrlibc.h
Project: AVR C Runtime Library
Submitted by: gjlayde
Submitted on: Mo 21 Jan 2013 18:50:39 GMT
Category: Feature Request
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Build system
Status: None
Percent Complete: 0%
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 1.8.0
Fixed Release: None
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Details:
avr-gcc installs the ISO/IEC TR18037 "Embedded C" header stdfix.h in an
install path prior to $target/inlude.
If avr-libc wants to hook in, it should install it's addendum to stdfix.h.
There are basically two ways to do it:
1) Install it as stdfix-avrlibc.h and stdfix.h will pick
it up (preferred).
2) Use the GNU extension #include_next <stdfix.h> to include
avr-libc's stdfix.h
Stuff that avr-gcc's stdfix.h provides are basic definitions from
* 7.18a.1 Introduction (sat, fract, accum)
* 7.18a.3 Precision macros (IBIT, FBIT, MN, MAX, EPSILON, ...)
and maybe more stuff that's easy to implement like
* 2.1.7.4 bits/fx/
* 2.1.7.5 /fx/bits
* more such basic stuff like absfx, roundfx that could
be provided with built-ins.
It would already help if you provide a dummy file that does nothing. Without
even a dummy, the above includes will barf, of course. But with them, you can
hook in new stuff at any time and at your option.
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