- Glasgow-haskell-users

package for ghci
by S.D.Mechveliani 30 May '01

30 May '01

To my questions on the package creation for ghci -package >> ... >> How should look a package for this? Simon Marlow <simonmar(a)microsoft.com> writes > The "package" consists of libraries, .hi files, and a package > specification. Which bit did you mean? I meant all the three + a whole story of its correct arrangement - to illustrate it on the given example of a single module project. But as you said, my scheme of action in mainly correct. So, let us go further. >> Is it created manually or by ghc -package-name ... ? >> ... >> For I have an impression that the ghc-5.00 User's guide cannot >> help in this situation. > The user's guide says, about -package-name: > > This option is added to the command line when compiling a > module that is destined to be part of package foo. If this > flag is omitted then the default package Main is assumed. > > seems fairly clear to me... which part are you confused about? I expected that the user would not need to (1) move .hi, .o files manually to /t/export, collecting them from all the project directories (2) archivate manually *.o to .a library, (maybe) (3) create manually the structure Package {...}. Note that the application project forces the user to do all this manually to install the project. I hoped -package-name --make would do (1) and (2). This fragment of User's Guide does not reject such hope. > Which parts of the documentation aren't being helpful to you? > [..] It looks that a newbie would not find out the needed order of action: 1. package specification, 2. ghc-pkg ... 3. ghc --make ..., 4. moving files and archivating to library. Does the Guide specify such order? Is it clear from the Guide which of these points can be done automatically? Where it is explained how to create a library .a from *.o ? A naive functional programmer would not know this, maybe, this is a system hacker's territory (?). I may mistake, this is only my impression. >> Then, after creating manually /t/export/libHSfoo.a >> and converting it by >> ld -r --whole-archive libHSfoo.a -o libHSfoo.o >> [..] >> >> it still does not work. ghci -package foo >> yields >> Loading package foo ... can't find .o or .so/.DLL for: HSfoo >> (libHSfoo.so: cannot open shared object file: No such file > It looks like there may be a problem with your package spec. > Could you list the contents of p.txt that you used to create the > package? I would reproduce the whole (short) story. ------------------------------------------------------- /home/mechvel/t/A.hs contains module A where a = 'a' and is one file project to build a package foo to reside in the directory /home/mechvel/t/export/ /home/mechvel/u/Main.hs imitates the user work with the package foo. It contains module Main where import A main = putStr ['b', a, '\n'] 1. Apply ghc-pkg -a < p.txt with p.txt containing Package {name = "foo", import_dirs = ["/home/mechvel/t/export" ], source_dirs = [], library_dirs = ["/home/mechvel/t/export" ], hs_libraries = ["HSfoo"], extra_libraries = ["HSfoo"], include_dirs = [], c_includes = [], package_deps = [], extra_ghc_opts = [], extra_cc_opts = [], extra_ld_opts = [] } 2. Test it with ghc-pkg -l 3. cd ~/t ghc -package-name foo --make A 4. mv *.hi *.o export/ cd export 5. ar -q libHSfoo.a *.o ld -r --whole-archive libHSdocon.a -o libHSdocon.o ----------------------------------------------------------- cd ~/t ghci -package foo ... Loading package std ... linking ... done. Loading package foo ... ghc-5.00.1: can't find .o or .so/.DLL for: HSfoo (libHSfoo.so: cannot open shared object file: No such file or directory) Regards, ----------------- Serge Mechveliani mechvel(a)botik.ru

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ghc-5.00.1 compiling with pw32 for win32.
by hooh pxw 30 May '01

30 May '01

Hi, i am new comer/bie. --*PW32 the Posix-over-Win32 layer*-- http://sourceforge.net/projects/pw32 PW32 is primarily C runtime library for Win32 aiming to POSIX compliance. Its main concerns are effeciency and support even for low-end Win9x systems. Also, PW32 is collection of ported software, aiming to be GNU (etc.) distribution for Win32. LGPL. i have no time to test. if this work, tell me. sorry my lazy cut/paste. global funny thing? no *.hi file errors. ignore below message... __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/

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building Green Card using ghc-5 continued
by trb＠eastpac.com.au 29 May '01

29 May '01

Oops - there is one more change needed: add -package lang to HC_OPTS in lib/ghc/Makefile I have not tried using it with Hugs. Tim

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RE: creating packages
by Simon Marlow 29 May '01

29 May '01

> Who could, please, consult on the package setting in ghc-5.00.1 > ? > Let the project foo consist of the files /t/A.hs > /t/t1/B.hs, > B import A, > the user work in /u/ and exploit foo in compiling, linking > and interpreting. > > Everything seems to work below, except `ghci -package' > and `ghc -c -package-name foo' > > (ghc-5.00.1 compiled from source for Linux, i386-unknown). > What I do: > > ------------------------------------------------- > * apply ghc --make B; That should be ghc -package-name foo --make B. because you're building modules for package 'foo'. > * move all *.o *.hi files to /t/export/ ; > * command cd /t/export/ > ar -q libHSfoo.a *.o (creating a library) > > * create a file p.txt containing > > Package {name = "foo", > import_dirs = ["/t/export" ], > source_dirs = [], > library_dirs = ["/t/export" ], > hs_libraries = ["HSfoo"], > extra_libraries = [], > include_dirs = [], c_includes = [], > package_deps = [], extra_ghc_opts = [], > extra_cc_opts = [], extra_ld_opts = [] > } > and apply ghc-pkg -a < p.txt > adding a package foo to ghc. > ------------------------------------------------- > > Then, for the user module /u/Main.hs > importing B, > the user commands cd /u; ghc -c -package foo Main.hs > ghc -o run Main.o -package foo > - and it works. > But ghci -package foo > yields > Loading package foo ... can't find .o or .so/.DLL for: HSfoo > (libHSfoo.so: cannot open shared object file: No such file > or directory) GHCi can't load .a files (at the moment). You can build a .o file from a .a file like so (with GNU ld): ld --whole-archive libHSfoo.a -o libHSfoo.o Cheers, Simon

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building Green Card using ghc-5
by trb＠eastpac.com.au 29 May '01

29 May '01

I finally got Green Card 2.01 to build with ghc-5.00 . There are two changes required: * replace all uses of -syslib with -package in src/Makefile * remove src/Pretty.lhs src/FiniteMap.lhs and src/GetOpt.lhs - the latter (redundant) source files upset ghc when it tries to import the same modules from packages. Tim

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creating packages
by S.D.Mechveliani 29 May '01

29 May '01

Who could, please, consult on the package setting in ghc-5.00.1 ? Let the project foo consist of the files /t/A.hs /t/t1/B.hs, B import A, the user work in /u/ and exploit foo in compiling, linking and interpreting. Everything seems to work below, except `ghci -package' and `ghc -c -package-name foo' (ghc-5.00.1 compiled from source for Linux, i386-unknown). What I do: ------------------------------------------------- * apply ghc --make B; * move all *.o *.hi files to /t/export/ ; * command cd /t/export/ ar -q libHSfoo.a *.o (creating a library) * create a file p.txt containing Package {name = "foo", import_dirs = ["/t/export" ], source_dirs = [], library_dirs = ["/t/export" ], hs_libraries = ["HSfoo"], extra_libraries = [], include_dirs = [], c_includes = [], package_deps = [], extra_ghc_opts = [], extra_cc_opts = [], extra_ld_opts = [] } and apply ghc-pkg -a < p.txt adding a package foo to ghc. ------------------------------------------------- Then, for the user module /u/Main.hs importing B, the user commands cd /u; ghc -c -package foo Main.hs ghc -o run Main.o -package foo - and it works. But ghci -package foo yields Loading package foo ... can't find .o or .so/.DLL for: HSfoo (libHSfoo.so: cannot open shared object file: No such file or directory) Then, I added /t/export/libHSdocon.so, but it does not help. Also ghc -c -package-name foo C.hs does not work. May ghc -c -package-name do automatically all this mess with moving .o, .hi files and archivating? Thank you in advance for the help. ----------------- Serge Mechveliani mechvel(a)botik.ru

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RE: Evacuated Object
by Simon Peyton-Jones 28 May '01

28 May '01

The error means that GHC's garbage collector has come across something it doesn't understand. It's either a bug in the GHC garbage collector, or in GHCi itself (which plays fast and loose with types in one or two places) or in something to do with the SDL graphics interface. Bugs like this are really hard to find, unless we can reproduce them here. Can you send us all the code? Simon | -----Original Message----- | From: John Knottenbelt [mailto:jak97@doc.ic.ac.uk] | Sent: 27 May 2001 19:24 | To: glasgow-haskell-users(a)haskell.org | Subject: Evacuated Object | | | I'm experimenting with GHC (5.00.1) on RedHat Linux 7.1, it's foreign | function interface (using .hsc files) and the SDL graphics | library (v1.2). | The curious thing is that the following code: | | main = sdlInit [sdlVideo[ | sdlQuit | | can be loaded into GHCi and executed as many times as I like, | however, if I then carry on and edit the module containing | main, and then perform a | reload (:r), I sometimes get an "EVACUATED object entered!" | message and GHC | crashes on me: | | TestGraphics> :r | Compiling TestGraphics ( TestGraphics.hs, interpreted ) | Ok, modules loaded: TestGraphics, SDL, Rectangle, SDLEvents, | SDLKeySyms, | ForeignUtil. | TestGraphics> main | EVACUATED object entered! | make: *** [interactive] Error 1 | bash$ | | What does this error mean, and why is it only triggered when | I perform a | reload in GHCi? | | Sometimes the reload works fine, and other times I get a | segmentation fault. | | Thanks | | John | | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users(a)haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-| haskell-users |

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Evacuated Object
by John Knottenbelt 27 May '01

27 May '01

I'm experimenting with GHC (5.00.1) on RedHat Linux 7.1, it's foreign function interface (using .hsc files) and the SDL graphics library (v1.2). The curious thing is that the following code: main = sdlInit [sdlVideo[ sdlQuit can be loaded into GHCi and executed as many times as I like, however, if I then carry on and edit the module containing main, and then perform a reload (:r), I sometimes get an "EVACUATED object entered!" message and GHC crashes on me: TestGraphics> :r Compiling TestGraphics ( TestGraphics.hs, interpreted ) Ok, modules loaded: TestGraphics, SDL, Rectangle, SDLEvents, SDLKeySyms, ForeignUtil. TestGraphics> main EVACUATED object entered! make: *** [interactive] Error 1 bash$ What does this error mean, and why is it only triggered when I perform a reload in GHCi? Sometimes the reload works fine, and other times I get a segmentation fault. Thanks John

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ghc-5.00.1 is available
by Julian Seward (Intl Vendor) 26 May '01

26 May '01

The (Interactive) Glasgow Haskell Compiler -- version 5.00.1 ============================================================== We are pleased to announce a new patchlevel release of the Glasgow Haskell Compiler (GHC), version 5.00.1. The source distribution is freely available via the World-Wide Web and through anon. FTP, under a BSD-style license. See below for download details. Pre-built packages for Linux, FreeBSD, and Solaris(sparc) are also available. Haskell is a standard lazy functional programming language; the current language version is Haskell 98, agreed in December 1998. GHC is a state-of-the-art programming suite for Haskell. Included is an optimising compiler generating good code for a variety of platforms, together with an interactive system for convenient, quick development. The distribution includes space and time profiling facilities, a large collection of libraries, and support for various language extensions, including concurrency, exceptions, and foreign language interfaces (C, C++, whatever). A wide variety of Haskell related resources (tutorials, libraries, specifications, documentation, compilers, interpreters, references, contact information, links to research groups) are available from the Haskell home page at http://www.haskell.org/ GHC's Web page lives at http://www.haskell.org/ghc/ What's new in 5.00.1 ====================== This is a bug-fix release. Most reported bugs in 5.00 have been fixed, including a substantial number of show-stopping bugs. The system should be much more usable for more people. Upgrading to 5.00.1 is recommended. To all those who tried out 5.00 and reported bugs, we thank you for your feedback and patience. At the moment there is no Win32 build of 5.00 or 5.00.1 available. We decided to push Win32 support to the 5.02 release, so as not to delay 5.00.1 any further. What's new in 5.00 ==================== 5.00 has been majorly revamped since the previous stable version, 4.08.2. This should be a stable release. Major changes since 4.08.2 are: - An interactive system, similar in style to Hugs. You can interactively load and unload modules, run expressions, ask the types of things. Module dependencies are tracked and chased automatically. Combinations of compiled and interpreted modules may be used. All the GHC libraries are available in interactive mode, as are most of the Glasgow extensions to Haskell 98. Compilation in interactive mode (to bytecode) is about three times faster than compiling to object code. - Batch compilation of multiple modules at once, with automatic dependency chasing. For large programs this can halve compilation times, and removes the need for Makefiles. - Enhanced package (library) management system. Packages may be installed and removed from an installation using the ghc-pkg tool. - Initial Unicode support - the Char type is now 31 bits. - Sparc native code generator, giving much faster compilation on sparcs. (Native code generation for x86s has been available for a while). - Improved heap profiling - you can restrict heap profiles by type, closure description, cost centre, and module. - Support for the latest Foreign Function Interface (FFI) proposals. Marcin Kowalczyk's hsc2hs tool is included. - Language extensions: parallel list comprehensions and functional dependencies. - The usual huge collection of bug fixes. Most reported bugs have been fixed. For full details see the release notes: http://www.haskell.org/ghc/docs/5.00/set/release-5-00.html How to get it =============== The easy way is to go to the WWW page, which should be self-explanatory: http://www.haskell.org/ghc/ We supply binary builds in .rpm/.deb form for all you Linux junkies out there, and in InstallShield form for Windows folks. Everybody else gets a .tar.gz which can be installed where you want. Once you have the distribution, please follow the pointers in the README file to find all of the documentation about this release. On-line GHC-related resources =============================== Relevant URLs on the World-Wide Web: GHC home page http://www.haskell.org/ghc/ Haskell home page http://www.haskell.org/ comp.lang.functional FAQ http://www.cs.nott.ac.uk/~gmh/faq.html System requirements ===================== To compile programs with GHC, you need a machine with 32+MB memory, GNU C and perl. This release is known to work on the following platforms: * i386-unknown-{linux,freebsd,mingw32} * sparc-sun-solaris2 Ports to the following platforms should be relatively easy (for a wunderhacker), but haven't been tested due to lack of time/hardware: * hppa1.1-hp-hpux{9,10} * i386-unknown-solaris2 * alpha-dec-osf{2,3} * mips-sgi-irix{5,6} * {rs6000,powerpc}-ibm-aix The builder's guide included in distribution gives a complete run-down of what ports work; an on-line version can be found at http://www.haskell.org/ghc/docs/5.00/building/building-guide.html Mailing lists =============== We run mailing lists for GHC users and bug reports; to subscribe, use the web interfaces at http://www.haskell.org/mailman/listinfo/glasgow-haskell-users http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs There are several other haskell and ghc-related mailing lists on www.haskell.org; for the full list, see http://www.haskell.org/mailman/listinfo/ Please send bug reports about GHC to glasgow-haskell-bugs(a)haskell.org; GHC users hang out on glasgow-haskell-users(a)haskell.org. Bleeding edge CVS users party on cvs-ghc(a)haskell.org.

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GHCi 5.00.1: packages can now be loaded at the prompt
by Simon Marlow 25 May '01

25 May '01

A new feature slipped into 5.00.1, but it looks like the documentation to go with it didn't get merged (probably my fault, sorry about that). You can now load packages from the GHCi prompt, like so: ___ ___ _ / _ \ /\ /\/ __(_) / /_\// /_/ / / | | GHC Interactive, version 5.00.1, For Haskell 98. / /_\\/ __ / /___| | http://www.haskell.org/ghc/ \____/\/ /_/\____/|_| Type :? for help. Loading package std ... linking ... :done. Prelude> :set -package lang Loading package lang ... linking ... done. Prelude> :set -package util Loading package concurrent ... linking ... done. Loading package posix ... linking ... done. Loading package util ... linking ... done. Prelude> This means you can also load packages from .ghci files too. Cheers, Simon

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