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| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/doc/install.texi | 10 |
2 files changed, 18 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ce1060a0ee7..efcbefe656d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,13 @@ 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. PR other/55243 diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index 2b0fbc77616..fbc9ec4bbb0 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -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 |