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backport: re PR target/54461 ([avr] add configure option for better AVR-Libc integration) 

Backport from 2013-01-07 trunk r194978.
	PR target/54461
	* doc/install.texi (Cross-Compiler-Specific Options): Document
	--with-avrlibc.

From-SVN: r194981
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Georg-Johann Lay 2013-01-07 16:22:59 +00:00 committed by Georg-Johann Lay
parent 19d79718ea
commit 1e0ae1eaf5
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@ -1,3 +1,11 @@
2013-01-07 Georg-Johann Lay <avr@gjlay.de>
Backport from 2013-01-07 trunk r194978.
PR target/54461
* doc/install.texi (Cross-Compiler-Specific Options): Document
--with-avrlibc.
2013-01-07 Georg-Johann Lay <avr@gjlay.de>
Backport from 2013-01-07 trunk r194968.

10
gcc/doc/install.texi
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@ -1804,6 +1804,16 @@ being used as the target C library. This causes @code{__eprintf} to be
omitted from @file{libgcc.a} on the assumption that it will be provided by
@samp{newlib}.
@item --with-avrlibc
Specifies that @samp{AVR-Libc} is
being used as the target C library. This causes float support
functions like @code{__addsf3} to be omitted from @file{libgcc.a} on
the assumption that it will be provided by @file{libm.a}. For more
technical details, cf. @uref{http://gcc.gnu.org/PR54461,,PR54461}.
This option is only supported for the AVR target. It is not supported for
RTEMS configurations, which currently use newlib. The option is
supported since version 4.7.2 and is the default in 4.8.0 and newer.
@item --with-build-time-tools=@var{dir}
Specifies where to find the set of target tools (assembler, linker, etc.)
that will be used while building GCC itself. This option can be useful