<title>User-visible compiler changes</title>
<itemizedlist>
<listitem>
- <para>GHCi added</para>
+ <para>GHCi, the new interactive environment on top of GHC, has
+ been added (<xref linkend="ghci">).</para>
</listitem>
<listitem>
- <para><option>--make</option> flag added</para>
+ <para>New <option>--make</option> flag added (<xref
+ linkend="make-mode">).</para>
</listitem>
<listitem>
- <para>dynamic vs. static options</para>
+ <para>The native code generator now supports Sparc in addition
+ to x86.</para>
</listitem>
<listitem>
- <para>NCG support for Sparc</para>
+ <para>We now make it clear which options can be placed in an
+ OPTIONS pragma. See <xref
+ linkend="static-dynamic-flags">.</para>
</listitem>
<listitem>
- <para><command>hsc2hs</command> added</para>
+ <para><option>-fglasgow-exts</option> no longer implies
+ <option>-package lang</option>.</para>
+ </listitem>
+ <listitem>
+ <para><option>-noC</option> is no more.</para>
+ </listitem>
+ <listitem>
+ <para><option>-hi</option> and <option>-nohi</option> are no more.</para>
+ </listitem>
+ <listitem>
+ <para>The concept of “packages” has been
+ generalised and extended. Packages may be installed or
+ removed from an existing GHC installation using the new
+ <command>ghc-pkg</command> tool. See <xref
+ linkend="packages">.</para>
+ </listitem>
+ <listitem>
+ <para>Initial unicode support: the <literal>Char</literal>
+ type is now 31 bits. We don't yet have support for unicode
+ I/O.</para>
+ </listitem>
+ <listitem>
+ <para><option>-v</option> now takes an optional numeric
+ argument indicating the level of verbosity (<xref
+ linkend="options-help">). <option>-dshow-passes</option> has
+ been removed.</para>
+ </listitem>
+ <listitem>
+ <para>Parallel list comprehensions added.</para>
+ </listitem>
+ <listitem>
+ <para>Profiling: please use
+ <literal>{-# SCC ".." #-}</literal>
+ rather than <literal>_scc_ "..."</literal>. The latter
+ will be phased out in due course.</para>
+ </listitem>
+ <listitem>
+ <para>A new experimental optimisation, SpecConstr, is turned
+ on with <literal>-O2</literal>.</para>
+ </listitem>
+ <listitem>
+ <para>Please report bugs using the <ulink
+ url="http://sourceforge.net/projects/ghc/">SourceForge bug
+ tracker</ulink> instead of
+ <email>glasgow-haskell-bugs@haskell.org</email> if
+ possible.</para>
+ </listitem>
+ <listitem>
+ <para>Documentation changes: there's now a useful Flag
+ Reference section, see <xref linkend="flag-reference">.</para>
+ </listitem>
+ <listitem>
+ <para>Many, many, bugfixes.</para>
+ </listitem>
+ </itemizedlist>
+ </sect2>
+
+ <sect2>
+ <title>New experimental features</title>
+
+ <itemizedlist>
+ <listitem>
+ <para>A “front panel” for GHC-compiled programs
+ displays real-time graphs of memory behaviour in a GTK+
+ window. You need to recompile the RTS with front panel
+ support to use this.</para>
+ </listitem>
+ </itemizedlist>
+ </sect2>
+
+ <sect2>
+ <title>FFI changes</title>
+ <itemizedlist>
+ <listitem>
+ <para><command>hsc2hs</command> added (<xref linkend="hsc2hs">).</para>
+ </listitem>
+ <listitem>
+ <para>FFI libraries have been updated to the latest proposal
+ from the FFI task force. Too many changes to list here, see
+ the docs: <xref linkend="sec-Foreign">.</para>
</listitem>
</itemizedlist>
</sect2>
<title>User-visible library changes</title>
<itemizedlist>
<listitem>
- <para>FFI libraries enhanced, lots of deprecations.</para>
+ <para><function>putMVar</function> now blocks if the
+ <literal>MVar</literal> is already full. The
+ <literal>PutFullMVar</literal> exception no longer exists. A
+ non-blocking version of <function>putMVar</function>,
+ <function>tryPutMVar</function>, has been added (<xref
+ linkend="sec-MVars">).</para>
+ </listitem>
+ <listitem>
+ <para>The <literal>Integer</literal> type now has an instance
+ of <literal>Bits</literal> (<xref linkend="sec-Bits">).</para>
+ </listitem>
+ <listitem>
+ <para>Package <literal>hssource</literal> has been added. It
+ contains a Haskell 98 abstract syntax, parser, lexer and pretty
+ printer. No documentation yet.</para>
+ </listitem>
+ </itemizedlist>
+ </sect2>
+
+ <sect2>
+ <title>Build system changes</title>
+
+ <itemizedlist>
+ <listitem>
+ <para>The <literal>WithGhcHc</literal> setting in
+ <literal>build.mk</literal> has been replaced by the
+ <literal>--with-ghc=<replaceable>ghc</replaceable></literal>
+ option to <literal>configure</literal>. The new option
+ <emphasis>must</emphasis> be used if you intend to use
+ anything except “<literal>ghc</literal>” to
+ bootstrap GHC, in order that the build system can figure out
+ what version of GHC you're using.</para>
+ </listitem>
+ <listitem>
+ <para>Source distributions are now made by doing <literal>make
+ distclean</literal> in a build tree, instead of requiring a
+ linked build tree.</para>
</listitem>
</itemizedlist>
</sect2>
<title>Internal changes</title>
<itemizedlist>
<listitem>
+ <para>Many internal compiler changes: too many to list
+ here.</para>
+ </listitem>
+ <listitem>
<para>The old perl driver has been removed and replaced by a
driver in the compiler proper.</para>
</listitem>
<listitem>
+ <para>We now use GMP 3 instead of GMP 2 for
+ arbitrary-precision integer support.</para>
+ </listitem>
+ <listitem>
<para>Several libraries rewritten to use the FFI.</para>
</listitem>
</itemizedlist>
<Para>
If you still have a problem after consulting this section, then you
-may have found a <Emphasis>bug</Emphasis>—please report it! See <XRef LinkEnd="bug-reports"> for a
-list of things we'd like to know about your bug. If in doubt, send a
-report—we love mail from irate users :-!
+may have found a <Emphasis>bug</Emphasis>—please report it! See
+<XRef LinkEnd="bug-reporting"> for details on how to report a bug and
+a list of things we'd like to know about your bug. If in doubt, send
+a report—we love mail from irate users :-!
</Para>
<Para>
</Para>
</ListItem>
</VarListEntry>
-<VarListEntry>
-<Term>“What's a `consistency error'?”</Term>
-<ListItem>
-<Para>
-(These are reported just after linking your program.)
-</Para>
-<Para>
-You tried to link incompatible object files, e.g., normal ones
-(registerised, Appel garbage-collector) with profiling ones (two-space
-collector). Or those compiled by a previous version of GHC
-with an incompatible newer version.
-</Para>
-
-<Para>
-If you run <Command>nm -o *.o | egrep 't (cc|hsc)\.'</Command> (or, on
-unregisterised files: <Command>what *.o</Command>), you'll see all the consistency
-tags/strings in your object files. They must all be the same!
-(ToDo: tell you what they mean…)
-</Para>
-</ListItem>
-</VarListEntry>
<VarListEntry>
<Term>“Is this line number right?”</Term>
<ListItem>
<Term>“My program entered an `absent' argument.”</Term>
<ListItem>
<Para>
-This is definitely caused by a bug in GHC. Please report it.
+This is definitely caused by a bug in GHC. Please report it (see <xref
+linkend="bug-reporting">).
</Para>
</ListItem>
</VarListEntry>
</Sect1>
-<Sect1 id="bug-reports">
-<Title>How to report a bug in the GHC system
-</Title>
-
-<Para>
-<IndexTerm><Primary>bug reports</Primary></IndexTerm>
-</Para>
-
-<Para>
-Glasgow Haskell is a changing system so there are sure to be bugs in
-it. Please report them to
-<Email>glasgow-haskell-bugs@haskell.org</Email>! (However, please
-check the earlier part of this section to be sure it's not a known
-not-really-a problem.)
-</Para>
-
-<Para>
-The name of the bug-reporting game is: facts, facts, facts.
-Don't omit them because “Oh, they won't be interested…”
-</Para>
-
-<Para>
-
-<OrderedList>
-<ListItem>
-
-<Para>
-What kind of machine are you running on, and exactly what version of
-the operating system are you using? (<Command>uname -a</Command> or
-<Command>cat /etc/motd</Command> will show the desired information.)
-
-</Para>
-</ListItem>
-<ListItem>
-
-<Para>
- What version of GCC are you using? <Command>gcc -v</Command> will tell you.
-
-</Para>
-</ListItem>
-<ListItem>
-
-<Para>
- Run the sequence of compiles/runs that caused the offending
-behaviour, capturing all the input/output in a “script” (a UNIX
-command) or in an Emacs shell window. We'd prefer to see the whole
-thing.
-
-</Para>
-</ListItem>
-<ListItem>
-
-<Para>
- Be sure any Haskell compilations are run with a <Option>-v</Option> (verbose)
-flag, so we can see exactly what was run, what versions of things you
-have, etc.
-
-</Para>
-</ListItem>
-<ListItem>
-
-<Para>
- What is the program behaviour that is wrong, in your opinion?
-
-</Para>
-</ListItem>
-<ListItem>
-
-<Para>
- If practical, please send enough source files for us to duplicate the
- problem.
-
-</Para>
-</ListItem>
-<ListItem>
-
-<Para>
- If you are a Hero and track down the problem in the
-compilation-system sources, please send us patches relative to a known
-released version of GHC, or whole files if you prefer.
-
-</Para>
-</ListItem>
-
-</OrderedList>
-
-</Para>
-
-</Sect1>
-
<Sect1 id="hard-core-debug">
<Title>Hard-core debugging of GHC-compiled programs
</Title>
<Para>
If your program is crashing, you should almost surely file a bug
-report, as outlined in previous sections.
+report, as outlined in <xref linkend="bug-reporting">.
</Para>
<Para>
</sect1>
+ <sect1 id="bug-reporting">
+ <title>Reporting bugs in GHC</title>
+ <indexterm><primary>bugs</primary><secondary>reporting</secondary>
+ </indexterm>
+ <indexterm><primary>reporting bugs</primary>
+ </indexterm>
+
+ <para>Glasgow Haskell is a changing system so there are sure to be
+ bugs in it. </para>
+
+ <para>To repot a bug, either:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para>Go to the <ulink
+ url="http://sourceforge.net/projects/ghc/">SoureForge GHC
+ page</ulink>, go to the <quote>bugs</quote> section, click on
+ <quote>submit</quote>, and enter your bug report. You can also
+ check the outstanding bugs here to make sure it hasn't already
+ been reported. Or:</para>
+ </listitem>
+ <listitem>
+ <para>Email your bug report to
+ <Email>glasgow-haskell-bugs@haskell.org</Email>. </para>
+ </listitem>
+ </itemizedlist>
+
+ <sect2>
+ <title>What to put in a bug report</title>
+ <indexterm><primary>bug reports</primary><secondary>contents</secondary></indexterm>
+
+ <para>The name of the bug-reporting game is: facts, facts,
+ facts. Don't omit them because “Oh, they won't be
+ interested…”</para>
+
+ <orderedlist>
+ <listitem>
+ <para>What kind of machine are you running on, and exactly
+ what version of the operating system are you using?
+ (on a Unix system, <Command>uname -a</Command> or <Command>cat
+ /etc/motd</Command> will show the desired information.)</para>
+ </listitem>
+
+ <listitem>
+ <para> What version of GCC are you using? <Command>gcc
+ -v</Command> will tell you.</para>
+ </listitem>
+
+ <listitem>
+ <para> Run the sequence of compiles/runs that caused the
+ offending behaviour, capturing all the input/output in a
+ “script” (a UNIX command) or in an Emacs shell
+ window. We'd prefer to see the whole thing.</para>
+ </listitem>
+
+ <listitem>
+ <para> Be sure any Haskell compilations are run with a
+ <Option>-v</Option> (verbose) flag, so we can see exactly
+ what was run, what versions of things you have, etc.</para>
+ </listitem>
+
+ <listitem>
+ <para> What is the program behaviour that is wrong, in your
+ opinion?</para>
+ </listitem>
+
+ <listitem>
+ <para> If practical, please send enough source files for us
+ to duplicate the problem.</para>
+ </listitem>
+
+ <listitem>
+ <para> If you are a Hero and track down the problem in the
+ compilation-system sources, please send us patches relative
+ to a known released version of GHC, or whole files if you
+ prefer.</para>
+ </listitem>
+ </orderedlist>
+ </sect2>
+ </sect1>
+
<sect1 id="version-numbering">
<title>GHC version numbering policy</title>
<indexterm><primary>version, of ghc</primary></indexterm>
<Para>
<Screen>
-<prompt> ./a.out +RTS -qP -qp8
-<prompt> grs2gr *.???.gr > temp.gr # combine the 8 .gr files into one
-<prompt> gr2ps -O temp.gr # cvt to .ps; output in temp.ps
-<prompt> ghostview -seascape temp.ps # look at it!
+<prompt>$</prompt> ./a.out +RTS -qP -qp8
+<prompt>$</prompt> grs2gr *.???.gr > temp.gr # combine the 8 .gr files into one
+<prompt>$</prompt> gr2ps -O temp.gr # cvt to .ps; output in temp.ps
+<prompt>$</prompt> ghostview -seascape temp.ps # look at it!
</Screen>
</Para>
</Para>
</ListItem>
</VarListEntry>
-<!-- no more -- HWL
+<!-- no more -HWL
<VarListEntry>
<Term><Option>-d</Option>:</Term>
<ListItem>
projects / ghc-hetmet.git / commitdiff