diff options
Diffstat (limited to 'gcc/doc/install.texi')
| -rw-r--r-- | gcc/doc/install.texi | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index 598873aea11..3c40ec186b5 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -1032,6 +1032,15 @@ For ARM targets, possible values for @var{dialect} are @code{gnu} or @code{gnu2}, which select between the original GNU dialect and the GNU TLS descriptor-based dialect. +@item --enable-multiarch +Specify whether to enable or disable multiarch support. The default is +to check for glibc start files in a multiarch location, and enable it +if the files are found. The auto detection is enabled for native builds, +and for cross builds configured with @option{--with-sysroot}, and without +@option{--with-native-system-header-dir}. +More documentation about multiarch can be found at +@uref{http://wiki.debian.org/Multiarch}. + @item --disable-multilib Specify that multiple target libraries to support different target variants, calling @@ -1804,6 +1813,16 @@ 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 @@ -3222,7 +3241,7 @@ This is a synonym for @samp{x86_64-*-solaris2.1[0-9]*}. @heading @anchor{arm-x-eabi}arm-*-eabi ARM-family processors. Subtargets that use the ELF object format require GNU binutils 2.13 or newer. Such subtargets include: -@code{arm-*-netbsdelf}, @code{arm-*-*linux-gnueabi} +@code{arm-*-netbsdelf}, @code{arm-*-*linux-gnueabi*} and @code{arm-*-rtemseabi}. @html @@ -4436,9 +4455,9 @@ releases mishandled unaligned relocations on @code{sparc-*-*} targets. @end html @heading @anchor{sparc64-x-solaris2}sparc64-*-solaris2* -When configuring the GNU Multiple Precision Library (GMP) or the -MPFR library, the canonical target triplet must be specified as -the @command{build} parameter on the configure line. For example +When configuring the GNU Multiple Precision Library (GMP), the MPFR +library or the MPC library, the canonical target triplet must be specified +as the @command{build} parameter on the configure line. For example on a Solaris 9 system: @smallexample |