--help} may list other options, but those not listed below may not
work and should not normally be used.
+Note that each @option{--enable} option has a corresponding
+@option{--disable} option and that each @option{--with} option has a
+corresponding @option{--without} option.
+
@table @code
@item --prefix=@var{dirname}
Specify the toplevel installation
previous Ada build procedures, when it was required to explicitly
do a @samp{make -C gcc gnatlib_and_tools}.
-@item --disable-libgcj
-Specify that the run-time libraries
-used by GCJ should not be built. This is useful in case you intend
-to use GCJ with some other run-time, or you're going to install it
-separately, or it just happens not to build on your particular
-machine. In general, if the Java front end is enabled, the GCJ
-libraries will be enabled too, unless they're known to not work on
-the target platform. If GCJ is enabled but @samp{libgcj} isn't built, you
-may need to port it; in this case, before modifying the top-level
-@file{configure.in} so that @samp{libgcj} is enabled by default on this platform,
-you may use @option{--enable-libgcj} to override the default.
-
@item --with-dwarf2
Specify that the compiler should
use DWARF 2 debugging information as the default.
Search for libiconv header files in @file{@var{dir}/include} and
libiconv library files in @file{@var{dir}/lib}.
-@item --with-system-zlib
-Use installed zlib rather than that included with GCC@. This option
-only applies if the Java front end is being built.
-
@item --enable-obsolete
Enable configuration for an obsoleted system. If you attempt to
configure GCC for a system (build, host, or target) which has been
forward to maintain the port.
@end table
-Some options which only apply to building cross compilers:
+@subheading Cross-Compiler-Specific Options
+The following options only apply to building cross compilers.
@table @code
@item --with-sysroot
@itemx --with-sysroot=@var{dir}
@samp{newlib}.
@end table
-Note that each @option{--enable} option has a corresponding
-@option{--disable} option and that each @option{--with} option has a
-corresponding @option{--without} option.
+@subheading Java-Specific Options
+
+The following option applies to the build of the Java front end.
+
+@table @code
+@item --disable-libgcj
+Specify that the run-time libraries
+used by GCJ should not be built. This is useful in case you intend
+to use GCJ with some other run-time, or you're going to install it
+separately, or it just happens not to build on your particular
+machine. In general, if the Java front end is enabled, the GCJ
+libraries will be enabled too, unless they're known to not work on
+the target platform. If GCJ is enabled but @samp{libgcj} isn't built, you
+may need to port it; in this case, before modifying the top-level
+@file{configure.in} so that @samp{libgcj} is enabled by default on this platform,
+you may use @option{--enable-libgcj} to override the default.
+
+@end table
+
+The following options apply to building @samp{libgcj}.
+
+@subsubheading General Options
+
+@table @code
+@item --disable-getenv-properties
+Don't set system properties from @env{GCJ_PROPERTIES}.
+
+@item --enable-hash-synchronization
+Use a global hash table for monitor locks. Ordinarily,
+@samp{libgcj}'s @samp{configure} script automatically makes
+the correct choice for this option for your platform. Only use
+this if you know you need the library to be configured differently.
+
+@item --enable-interpreter
+Enable the Java interpreter. The interpreter is automatically
+enabled by default on all platforms that support it. This option
+is really only useful if you want to disable the interpreter
+(using @option{--disable-interpreter}).
+
+@item --disable-java-net
+Disable java.net. This disables the native part of java.net only,
+using non-functional stubs for native method implementations.
+
+@item --disable-jvmpi
+Disable JVMPI support.
+
+@item --with-ecos
+Enable runtime eCos target support.
+
+@item --without-libffi
+Don't use @samp{libffi}. This will disable the interpreter and JNI
+support as well, as these require @samp{libffi} to work.
+
+@item --enable-libgcj-debug
+Enable runtime debugging code.
+
+@item --enable-libgcj-multifile
+If specified, causes all @file{.java} source files to be
+compiled into @file{.class} files in one invocation of
+@samp{gcj}. This can speed up build time, but is more
+resource-intensive. If this option is unspecified or
+disabled, @samp{gcj} is invoked once for each @file{.java}
+file to compile into a @file{.class} file.
+
+@item --with-libiconv-prefix=DIR
+Search for libiconv in @file{DIR/include} and @file{DIR/lib}.
+
+@item --enable-sjlj-exceptions
+Force use of @code{builtin_setjmp} for exceptions. @samp{configure}
+ordinarily picks the correct value based on the platform. Only use
+this option if you are sure you need a different setting.
+
+@item --with-system-zlib
+Use installed @samp{zlib} rather than that included with GCC@.
+
+@item --with-win32-nlsapi=ansi, unicows or unicode
+Indicates how MinGW @samp{libgcj} translates between UNICODE
+characters and the Win32 API.
+@table @code
+@item ansi
+Use the single-byte @code{char} and the Win32 A functions natively,
+translating to and from UNICODE when using these functions. If
+unspecified, this is the default.
+
+@item unicows
+Use the @code{WCHAR} and Win32 W functions natively. Adds
+@code{-lunicows} to @file{libgcj.spec} to link with @samp{libunicows}.
+@file{unicows.dll} needs to be deployed on Microsoft Windows 9X machines
+running built executables. @file{libunicows.a}, an open-source
+import library around Microsoft's @code{unicows.dll}, is obtained from
+@uref{http://libunicows.sourceforge.net/}, which also gives details
+on getting @file{unicows.dll} from Microsoft.
+
+@item unicode
+Use the @code{WCHAR} and Win32 W functions natively. Does @emph{not}
+add @code{-lunicows} to @file{libgcj.spec}. The built executables will
+only run on Microsoft Windows NT and above.
+@end table
+@end table
+
+@subsubheading AWT-Specific Options
+
+@table @code
+@item --with-x
+Use the X Window System.
+
+@item --enable-java-awt=PEER(S)
+Specifies the AWT peer library or libraries to build alongside
+@samp{libgcj}. If this option is unspecified or disabled, AWT
+will be non-functional. Current valid values are @option{gtk} and
+@option{xlib}. Multiple libraries should be separated by a
+comma (i.e. @option{--enable-java-awt=gtk,xlib}).
+
+@item --enable-gtk-cairo
+Build the cairo Graphics2D implementation on GTK.
+
+@item --enable-java-gc=TYPE
+Choose garbage collector. Defaults to @option{boehm} if unspecified.
+
+@item --disable-gtktest
+Do not try to compile and run a test GTK+ program.
+
+@item --disable-glibtest
+Do not try to compile and run a test GLIB program.
+
+@item --with-libart-prefix=PFX
+Prefix where libart is installed (optional).
+
+@item --with-libart-exec-prefix=PFX
+Exec prefix where libart is installed (optional).
+
+@item --disable-libarttest
+Do not try to compile and run a test libart program.
+
+@end table
@html
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