@item @anchor{GDC-prerequisite}GDC
In order to build GDC, the D compiler, you need a working GDC
-compiler (GCC version 9.1 or later), as the D front end is written in D.
+compiler (GCC version 9.1 or later) and D runtime library,
+@samp{libphobos}, as the D front end is written in D.
Versions of GDC prior to 12 can be built with an ISO C++11 compiler, which can
then be installed and used to bootstrap newer versions of the D front end.
of the D language, if too old a GDC version is installed and
@option{--enable-languages=d} is used, the build will fail.
+On some targets, @samp{libphobos} isn't enabled by default, but compiles
+and works if @option{--enable-libphobos} is used. Specifics are
+documented for affected targets.
+
@item A ``working'' POSIX compatible shell, or GNU bash
Necessary when running @command{configure} because some
mipsisa64r2el, mipsisa64sb1, mipsisa64sr71k, mipstx39, mmix, mn10300, moxie,
msp430, nds32be, nds32le, nios2, nvptx, or1k, pdp11, powerpc, powerpc64,
powerpc64le, powerpcle, pru, riscv32, riscv32be, riscv64, riscv64be, rl78, rx,
-s390, s390x, sh, shle, sparc, sparc64, tic6x, tilegx, tilegxbe, tilepro, v850,
+s390, s390x, sh, shle, sparc, sparc64, tic6x, v850,
v850e, v850e1, vax, visium, x86_64, xstormy16, xtensa
@end quotation
point, it is not recommended to use
@option{--with-long-double-format=ieee}.
-On little endian PowerPC Linux systems, if you explicitly set the
-@code{long double} type, it will build multilibs to allow you to
-select either @code{long double} format, unless you disable multilibs
-with the @code{--disable-multilib} option. At present,
-@code{long double} multilibs are not built on big endian PowerPC Linux
-systems. If you are building multilibs, you will need to configure
-the compiler using the @option{--with-system-zlib} option.
-
-If you do not set the @code{long double} type explicitly, no multilibs
-will be generated.
-
@item --enable-fdpic
On SH Linux systems, generate ELF FDPIC code.
of those optional packages should determine the actual supported offloading
target set rather than the GCC configure-time selection.
-@item --with-hsa-runtime=@var{pathname}
-@itemx --with-hsa-runtime-include=@var{pathname}
-@itemx --with-hsa-runtime-lib=@var{pathname}
-
-If you configure GCC with offloading which uses an HSA run-time such as
-AMDGCN but do not have the HSA run-time library installed in a standard
-location then you can explicitly specify the directory where they are
-installed. The @option{--with-hsa-runtime=@/@var{hsainstalldir}} option
-is a shorthand for
-@option{--with-hsa-runtime-lib=@/@var{hsainstalldir}/lib} and
-@option{--with-hsa-runtime-include=@/@var{hsainstalldir}/include}.
-
@item --enable-cet
@itemx --disable-cet
Enable building target run-time libraries with control-flow
default is derived from glibc's behavior. When glibc clamps float_t to double,
GCC follows and enables the option. For other cross compiles, the default is
disabled.
+
+@item --with-zstd=@var{pathname}
+@itemx --with-zstd-include=@var{pathname}
+@itemx --with-zstd-lib=@var{pathname}
+If you do not have the @code{zstd} library installed in a standard
+location and you want to build GCC, you can explicitly specify the
+directory where it is installed (@samp{--with-zstd=@/@var{zstdinstalldir}}).
+The @option{--with-zstd=@/@var{zstdinstalldir}} option is shorthand for
+@option{--with-zstd-lib=@/@var{zstdinstalldir}/lib} and
+@option{--with-zstd-include=@/@var{zstdinstalldir}/include}. If this
+shorthand assumption is not correct, you can use the explicit
+include and lib options directly.
+
+These flags are applicable to the host platform only. When building
+a cross compiler, they will not be used to configure target libraries.
@end table
@subheading Cross-Compiler-Specific Options
@item
@uref{#c6x-x-x,,c6x-*-*}
@item
-@uref{#tilegx-x-linux,,tilegx-*-linux*}
-@item
-@uref{#tilegxbe-x-linux,,tilegxbe-*-linux*}
-@item
-@uref{#tilepro-x-linux,,tilepro-*-linux*}
-@item
@uref{#visium-x-elf, visium-*-elf}
@item
@uref{#x-x-vxworks,,*-*-vxworks*}
@end html
@anchor{cris}
@heading CRIS
-CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
-series. These are used in embedded applications.
+CRIS is a CPU architecture in Axis Communications systems-on-a-chip, for
+example the ETRAX series. These are used in embedded applications.
@ifnothtml
@xref{CRIS Options,, CRIS Options, gcc, Using the GNU Compiler
@end ifhtml
for a list of CRIS-specific options.
-There are a few different CRIS targets:
-@table @code
-@item cris-axis-elf
-Mainly for monolithic embedded systems. Includes a multilib for the
-@samp{v10} core used in @samp{ETRAX 100 LX}.
-@item cris-axis-linux-gnu
-A GNU/Linux port for the CRIS architecture, currently targeting
-@samp{ETRAX 100 LX} by default.
-@end table
-
-Pre-packaged tools can be obtained from
-@uref{ftp://ftp.axis.com/@/pub/@/axis/@/tools/@/cris/@/compiler-kit/}. More
-information about this platform is available at
-@uref{http://developer.axis.com/}.
-
+Use @samp{configure --target=cris-elf} to configure GCC@ for building
+a cross-compiler for CRIS.
@html
<hr />
@end html
appropriate version is found. Solaris @command{c++filt} from the Solaris
Studio compilers does @emph{not} work.
+In order to build the GNU D compiler, GDC, a working @samp{libphobos} is
+needed. That library wasn't built by default in GCC 9--11 on SPARC, or
+on x86 when the Solaris assembler is used, but can be enabled by
+configuring with @option{--enable-libphobos}. Also, GDC 9.4.0 is
+required on x86, while GDC 9.3.0 is known to work on SPARC.
+
The versions of the GNU Multiple Precision Library (GMP), the MPFR
library and the MPC library bundled with Solaris 11.3 and later are
usually recent enough to match GCC's requirements. There are two
@item
The version of the MPFR libary included in Solaris 11.3 is too old; you
need to provide a more recent one.
+
@end itemize
@html
@heading c6x-*-*
The C6X family of processors. This port requires binutils-2.22 or newer.
-@html
-<hr />
-@end html
-@anchor{tilegx-*-linux}
-@heading tilegx-*-linux*
-The TILE-Gx processor in little endian mode, running GNU/Linux. This
-port requires binutils-2.22 or newer.
-
-@html
-<hr />
-@end html
-@anchor{tilegxbe-*-linux}
-@heading tilegxbe-*-linux*
-The TILE-Gx processor in big endian mode, running GNU/Linux. This
-port requires binutils-2.23 or newer.
-
-@html
-<hr />
-@end html
-@anchor{tilepro-*-linux}
-@heading tilepro-*-linux*
-The TILEPro processor running GNU/Linux. This port requires
-binutils-2.22 or newer.
-
@html
<hr />
@end html
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