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109 lines
3.9 KiB
Plaintext
109 lines
3.9 KiB
Plaintext
Configuring egcs-1.0
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Like most GNU software, egcs must be configured before it can be built.
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This document attempts to describe the recommended configuration procedure
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for both native and cross targets.
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We use srcdir to refer to the toplevel source directory for
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egcs; we use objdir to refer to the toplevel build/object
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directory for egcs.
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First, we highly recommend that egcs be built into a separate
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directory than the sources. This is how we generally build egcs; building
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where srcdir == objdir should still work, but doesn't get
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extensive testing.
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Second, when configuring a native system, either "cc" must be in your
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path or you must set CC in your environment before running configure.
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Otherwise the configuration scripts may fail.
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To configure egcs:
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% mkdir objdir
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% cd objdir
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% srcdir/configure [target] [options]
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target specification
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egcs has code to correctly determine the correct value for
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target for nearly all native systems. Therefore, we highly
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recommend you not provide a configure target when configuring a
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native compiler.
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target must be specified when configuring a cross compiler;
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examples of valid targets would be i960-rtems, m68k-coff, sh-elf, etc.
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options specification
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Use options to override several configure time options for
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egcs. A partial list of supported options:
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--prefix=dirname -- Specify the toplevel installation
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directory. This is the recommended way to install the tools into a directory
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other than the default. The toplevel installation directory defaults to
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/usr/local.
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These additional options control where certain parts of the distribution
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are installed. Normally you should not need to use these options.
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--with-local-prefix=dirname -- Specify the installation
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directory for local include files. The default is /usr/local.
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--with-gxx-include-dir=dirname -- Specify the installation
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directory for g++ header files. The default is /usr/local/include/g++.
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--enable-shared -- Build shared versions of the C++ runtime
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libraries if supported --disable-shared is the default.
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--enable-haifa -- Enable the new Haifa instruction scheduler in the
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compiler; the new scheduler can significantly improve code on some targets.
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--disable-haifa is currently the default on all platforms except the HPPA.
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--with-gnu-as -- Specify that the compiler should assume the GNU
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assembler (aka gas) is available.
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--with-gnu-ld -- Specify that the compiler should assume the GNU
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linker (aka gld) is available.
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--with-stabs -- Specify that stabs debugging information should be used
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instead of whatever format the host normally uses. Normally GCC uses the
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same debug format as the host system.
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--enable-multilib -- Specify that multiple target libraries
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should be built to support different target variants, calling conventions,
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etc. This is the default.
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--enable-threads -- Specify that the target supports threads.
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This only effects the Objective-C compiler and runtime library.
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--enable-threads=lib -- Specify that lib is the
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thread support library. This only effects the Objective-C compiler and
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runtime library.
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--with-cpu=cpu -- Specify which cpu variant the compiler should
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generate code for by default. This is currently only supported on the
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RS6000/PowerPC ports.
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Some options which only apply to building cross compilers:
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--with-headers=dir -- Specifies a directory which has target
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include files.
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--with-libs=dirs -- Specifies a list of directories which contain
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the target runtime libraries.
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--with-newlib -- Specifies that "newlib" is being used as the target
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C library. This causes __eprintf to be omitted from libgcc.a on the
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assumption that it will be provided by newlib.
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Note that each --enable option has a corresponding --disable option and
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that each --with option has a corresponding --without option.
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Last modified on December 2, 1997.
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