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Author Topic: Cross compiling Linux 64 bit to 32 bit.  (Read 13345 times)

chrnobel

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Cross compiling Linux 64 bit to 32 bit.
« on: April 10, 2015, 11:40:41 am »
Hi.

I have a freshly installed Linux Mint 17 - 64bit, where I am struggling to get cross compilation to work.

I have installed the latest stable version (2.6.4 and 1.2.6) of Fpc, Fpcsrc, and Lazarus from the .debs.

Default compiling works as expected, no problem.

I then followed the cross compilation Wiki, made the scripts for i386-linux-ld and i386-linux-as, and after installing gcc-multilib I was able to do the "sudo make all CPU_TARGET=i386" and "sudo make crossinstall CPU_TARGET=i386"

Compilation and installation without any problems.

And then, it should be "That's it" according to the Wiki.

BUT apparently that's not it.

I open Lazarus, and want to check if it works:
Project > Options > Compiler Options > Config and Target, sets the target to Linux and the CPU family to i386, and presses test, and gets this:
Code: [Select]
WARNING: library search path does not exist: /opt/gnome/lib
WARNING: unit search path does not exist: /usr/share/lazarus/1.2.6/lcl/units/i386-linux/gtk2
WARNING: unit search path does not exist: /usr/share/lazarus/1.2.6/lcl/units/i386-linux
WARNING: unit search path does not exist: /usr/share/lazarus/1.2.6/components/lazutils/lib/i386-linux
ERROR: compiled FPC unit not found: system.ppu
ERROR: compiled FPC unit not found: sysutils.ppu
ERROR: compiled FPC unit not found: classes.ppu
ERROR: compiled FPC unit not found: avl_tree.ppu
ERROR: compiled FPC unit not found: zstream.ppu


Then I try the "Test cross compiler" example in the cross compilation Wiki:
Code: [Select]
program test;
begin
  writeln('DATE ',{$i %DATE%});
  writeln('FPCTARGET ',{$i %FPCTARGET%});
  writeln('FPCTARGETCPU ',{$i %FPCTARGETCPU%});
  writeln('FPCTARGETOS ',{$i %FPCTARGETOS%});
  writeln('FPCVERSION ',{$i %FPCVERSION%});
end.
"fpc -TLinux -Px86_64 test.pas" works as expected, but

"fpc -TLinux -Pi386 test.pas" ends up with this error:
 
Error: ppc386 can't be executed, error message: Failed to execute "ppc386", error code: 127

I have a feeling that the parts that follows after the laconic "That's it", namely the "Edit your /etc/fpc.cfg file if needed." could as well cover:
"Then you just have to do some mumbo-jumbo"

So what am missing?

Regards
Christian


 

zeljko

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #1 on: April 10, 2015, 12:32:06 pm »
you're missing ppc386. Maybe it's in /usr/lib/fpc/2.6.0 , so you need to create symlink into /usr/bin ...or where ever, where fpc binary is.

chrnobel

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #2 on: April 10, 2015, 01:00:09 pm »
Thanks, that brought me a step forward - now I can compile the test file, but I do still have a problem in Lazarus.

When trying to test the compile options I get:
Code: [Select]
WARNING: library search path does not exist: /opt/gnome/lib
WARNING: unit search path does not exist: /usr/share/lazarus/1.2.6/lcl/units/i386-linux/gtk2
WARNING: unit search path does not exist: /usr/share/lazarus/1.2.6/lcl/units/i386-linux
WARNING: unit search path does not exist: /usr/share/lazarus/1.2.6/components/lazutils/lib/i386-linux
HINT: using config file /etc/fpc.cfg
ERROR: compiled FPC unit not found: avl_tree.ppu
ERROR: compiled FPC unit not found: zstream.ppu
WARNING: FPC unit path contains a source: /usr/share/fpcsrc/2.6.4/compiler/dbgbase.pas

zeljko

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #3 on: April 10, 2015, 02:17:20 pm »
That's because lazarus units aren't cross compiled for i386, you must build lazarus with CPU_TARGET=i386 or maybe CPU_TARGET=i686, not sure.

chrnobel

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #4 on: April 10, 2015, 02:55:14 pm »
Tried, and got this result:
Code: [Select]
make -C packager/registration
make[1]: Går til katalog '/usr/share/lazarus/1.2.6/packager/registration'
/bin/rm -f ../units/i386-linux/fcllaz.ppu
/usr/bin/fpc -Pi386 -XPi386-linux- -Xr -MObjFPC -Scghi -O1 -g -gl -vewnhi -l -Fu. -Fu/usr/local/lib/fpc/2.6.4/units/i386-linux/rtl -FE. -FU../units/i386-linux -di386  fcllaz.pas
Hint: Start of reading config file /etc/fpc.cfg
Hint: End of reading config file /etc/fpc.cfg
Free Pascal Compiler version 2.6.4 [2015/04/10] for i386
Copyright (c) 1993-2014 by Florian Klaempfl and others
Target OS: Linux for i386
Compiling fcllaz.pas
Compiling registerfcl.pas
registerfcl.pas(45,22) Fatal: Can't find unit process used by RegisterFCL
Fatal: Compilation aborted
Error: /usr/bin/ppc386 returned an error exitcode (normal if you did not specify a source file to be compiled)
make[1]: *** [fcllaz.ppu] Fejl 1
make[1]: Forlader katalog '/usr/share/lazarus/1.2.6/packager/registration'
make: *** [registration] Fejl 2

So I am getting closer, but still need to tell fpc/lazarus where/how to find unit process?
« Last Edit: April 10, 2015, 02:57:29 pm by chrnobel »

marcov

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #5 on: April 10, 2015, 03:08:56 pm »
This seems to be a problem with the FPC installation. The process unit is part of FPC.

Either the installation is incomplete, or the unit path (-Fu) is not correct.

zeljko

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #6 on: April 10, 2015, 03:17:34 pm »
I guess that he must tune -Fu in his fpc.cfg for i386 target

chrnobel

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #7 on: April 10, 2015, 03:23:35 pm »
This seems to be a problem with the FPC installation. The process unit is part of FPC.
Either the installation is incomplete
As said, I installed the stable version without problem, and I compiled FPC itself with Target=i386 without any problems.

So how can I determine in which way the installation is incomplete, as everything until Lazarus seems to be ok?

Quote
or the unit path (-Fu) is not correct.
Leading me to - I have made an out-of-the-box installation on a very common Linux, so what do I have to change?

zeljko

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #8 on: April 10, 2015, 04:05:17 pm »
/etc/fpc.cfg .... there must be entry for i386 -Fu but is probably commented or points to the wrong path

chrnobel

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #9 on: April 10, 2015, 04:15:33 pm »
/etc/fpc.cfg .... there must be entry for i386 -Fu but is probably commented or points to the wrong path

Ok, here comes the fpc.cfg:
Code: [Select]
#
# Config file generated by fpcmkcfg on 10-4-15 - 09:51:33
# Example fpc.cfg for Free Pascal Compiler
#

# ----------------------
# Defines (preprocessor)
# ----------------------

#
# nested #IFNDEF, #IFDEF, #ENDIF, #ELSE, #DEFINE, #UNDEF are allowed
#
# -d is the same as #DEFINE
# -u is the same as #UNDEF
#

#
# Some examples (for switches see below, and the -? helppages)
#
# Try compiling with the -dRELEASE or -dDEBUG on the commandline
#

# For a release compile with optimizes and strip debuginfo
#IFDEF RELEASE
  -O2
  -Xs
  #WRITE Compiling Release Version
#ENDIF

# For a debug version compile with debuginfo and all codegeneration checks on
#IFDEF DEBUG
  -gl
  -Crtoi
  #WRITE Compiling Debug Version
#ENDIF

# assembling
#ifdef darwin
# use pipes instead of temporary files for assembling
-ap
# path to Xcode 4.3+ utilities (no problem if it doesn't exist)
-FD/Applications/Xcode.app/Contents/Developer/usr/bin
#endif

# ----------------
# Parsing switches
# ----------------

# Pascal language mode
#      -Mfpc      free pascal dialect (default)
#      -Mobjfpc   switch some Delphi 2 extensions on
#      -Mdelphi   tries to be Delphi compatible
#      -Mtp       tries to be TP/BP 7.0 compatible
#      -Mgpc      tries to be gpc compatible
#      -Mmacpas   tries to be compatible to the macintosh pascal dialects
#
# Turn on Object Pascal extensions by default
#-Mobjfpc

# Assembler reader mode
#      -Rdefault  use default assembler
#      -Ratt      read AT&T style assembler
#      -Rintel    read Intel style assembler
#
# All assembler blocks are AT&T styled by default
#-Ratt

# Semantic checking
#      -S2        same as -Mobjfpc
#      -Sc        supports operators like C (*=,+=,/= and -=)
#      -Sa        include assertion code.
#      -Sd        same as -Mdelphi
#      -Se<x>     error options. <x> is a combination of the following:
#         <n> : compiler stops after <n> errors (default is 1)
#         w   : compiler stops also after warnings
#         n   : compiler stops also after notes
#         h   : compiler stops also after hints
#      -Sg        allow LABEL and GOTO
#      -Sh        Use ansistrings
#      -Si        support C++ styled INLINE
#      -Sk        load fpcylix unit
#      -SI<x>     set interface style to <x>
#         -SIcom    COM compatible interface (default)
#         -SIcorba  CORBA compatible interface
#      -Sm        support macros like C (global)
#      -So        same as -Mtp
#      -Sp        same as -Mgpc
#      -Ss        constructor name must be init (destructor must be done)
#      -Sx        enable exception keywords (default in Delphi/ObjFPC modes)
#
# Allow goto, inline, C-operators, C-vars
-Sgic

# ---------------
# Code generation
# ---------------

# Uncomment the next line if you always want static/dynamic units by default
# (can be overruled with -CD, -CS at the commandline)
#-CS
#-CD

# Set the default heapsize to 8Mb
#-Ch8000000

# Set default codegeneration checks (iocheck, overflow, range, stack)
#-Ci
#-Co
#-Cr
#-Ct

# Optimizer switches
# -Os        generate smaller code
# -Oa=N      set alignment to N
# -O1        level 1 optimizations (quick optimizations, debuggable)
# -O2        level 2 optimizations (-O1 + optimizations which make debugging more difficult)
# -O3        level 3 optimizations (-O2 + optimizations which also may make the program slower rather than faster)
# -Oo<x>     switch on optimalization x. See fpc -i for possible values
# -OoNO<x>   switch off optimalization x. See fpc -i for possible values
# -Op<x>     set target cpu for optimizing, see fpc -i for possible values

#ifdef darwin
#ifdef cpui386
-Cppentiumm
-Oppentiumm
#endif
#endif

# -----------------------
# Set Filenames and Paths
# -----------------------

# Both slashes and backslashes are allowed in paths

# path to the messagefile, not necessary anymore but can be used to override
# the default language
#-Fr/usr/lib/fpc/$fpcversion/msg/errore.msg
#-Fr/usr/lib/fpc/$fpcversion/msg/errorn.msg
#-Fr/usr/lib/fpc/$fpcversion/msg/errores.msg
#-Fr/usr/lib/fpc/$fpcversion/msg/errord.msg
#-Fr/usr/lib/fpc/$fpcversion/msg/errorr.msg

# searchpath for units and other system dependent things
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/*
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/rtl

#IFDEF FPCAPACHE_1_3
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/httpd13/
#ELSE
#IFDEF FPCAPACHE_2_0
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/httpd20
#ELSE
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/httpd22
#ENDIF
#ENDIF

# searchpath for fppkg user-specific packages
-Fu~/.fppkg/lib/fpc/$fpcversion/units/$FPCTARGET/*

# path to the gcclib
#ifdef cpui386
-Fl/usr/lib/gcc/x86_64-linux-gnu/4.8/32
#endif
#ifdef cpux86_64
-Fl/usr/lib/gcc/x86_64-linux-gnu/4.8
#endif

# searchpath for libraries
#-Fl/usr/lib/fpc/$fpcversion/lib
#-Fl/lib;/usr/lib
-Fl/usr/lib/fpc/$fpcversion/lib/$FPCTARGET

# searchpath for tools
-FD/usr/lib/fpc/$fpcversion/bin/$FPCTARGET

#IFNDEF CPUI386
#IFNDEF CPUAMD64
#DEFINE NEEDCROSSBINUTILS
#ENDIF
#ENDIF

#IFNDEF Linux
#DEFINE NEEDCROSSBINUTILS
#ENDIF

# binutils prefix for cross compiling
#IFDEF FPC_CROSSCOMPILING
#IFDEF NEEDCROSSBINUTILS
  -XP$FPCTARGET-
#ENDIF
#ENDIF


# -------------
# Linking
# -------------

# generate always debugging information for GDB (slows down the compiling
# process)
#      -gc        generate checks for pointers
#      -gd        use dbx
#      -gg        use gsym
#      -gh        use heap trace unit (for memory leak debugging)
#      -gl        use line info unit to show more info for backtraces
#      -gv        generates programs tracable with valgrind
#      -gw        generate dwarf debugging info
#
# Enable debuginfo and use the line info unit by default
#-gl

# always pass an option to the linker
#-k-s

# Always strip debuginfo from the executable
-Xs


# -------------
# Miscellaneous
# -------------

# Write always a nice FPC logo ;)
-l

# Verbosity
#      e : Show errors (default)       d : Show debug info
#      w : Show warnings               u : Show unit info
#      n : Show notes                  t : Show tried/used files
#      h : Show hints                  s : Show time stamps
#      i : Show general info           q : Show message numbers
#      l : Show linenumbers            c : Show conditionals
#      a : Show everything             0 : Show nothing (except errors)
#      b : Write file names messages   r : Rhide/GCC compatibility mode
#          with full path              x : Executable info (Win32 only)
#      v : write fpcdebug.txt with     p : Write tree.log with parse tree
#          lots of debugging info
#
# Display Info, Warnings and Notes
-viwn
# If you don't want so much verbosity use
#-vw

This must be a common problem, as I (as said) have made a plain vanilla installation of Linux Mint 17, and a plain vanilla installation of Fpc and Lazarus.

Leledumbo

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #10 on: April 10, 2015, 04:17:28 pm »
Code: [Select]
# searchpath for units and other system dependent things
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/*
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/rtl

#IFDEF FPCAPACHE_1_3
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/httpd13/
#ELSE
#IFDEF FPCAPACHE_2_0
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/httpd20
#ELSE
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/httpd22
#ENDIF
#ENDIF
None of them points to /usr/local/lib/fpc/...

chrnobel

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #11 on: April 10, 2015, 04:26:46 pm »
None of them points to /usr/local/lib/fpc/...
And could you please enlighten me with what I have to do, not what I failed in doing :)

zeljko

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #12 on: April 10, 2015, 04:49:50 pm »
Do you have something like this in /etc/fpc.cfg ?
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/*
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/rtl

And are your i386 units there ?

chrnobel

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #13 on: April 10, 2015, 05:21:10 pm »
Do you have something like this in /etc/fpc.cfg ?
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/*
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/rtl

And are your i386 units there ?
I have added the following 3 lines:

-Fu/usr/local/lib/fpc/$fpcversion/units/$fpctarget
-Fu/usr/local/lib/fpc/$fpcversion/units/$fpctarget/*
-Fu/usr/local/lib/fpc/$fpcversion/units/$fpctarget/rtl

Now I am able to compile Lazarus, but now I face a bizarre problems, as the compilation stops with this error:

Compiling treefilteredit.pas
treefilteredit.pas(61,60) Error: Illegal expression
treefilteredit.pas(61,60) Error: Error in type definition
treefilteredit.pas(61,60) Fatal: Syntax error, ">" expected but "" found
Fatal: Compilation aborted

But line 61 in treefilteredit looks exactly as expected:
Code: [Select]
TBranchList = specialize TFPGObjectList<TTreeFilterBranch>;
and the > is in position 60

very stange :o


Leledumbo

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Re: Cross compiling Linux 64 bit to 32 bit.
« Reply #14 on: April 10, 2015, 06:02:53 pm »
Now I am able to compile Lazarus, but now I face a bizarre problems, as the compilation stops with this error:

Compiling treefilteredit.pas
treefilteredit.pas(61,60) Error: Illegal expression
treefilteredit.pas(61,60) Error: Error in type definition
treefilteredit.pas(61,60) Fatal: Syntax error, ">" expected but "" found
Fatal: Compilation aborted

But line 61 in treefilteredit looks exactly as expected:
Code: [Select]
TBranchList = specialize TFPGObjectList<TTreeFilterBranch>;
and the > is in position 60

very stange :o
Guess I've met this bug before. Oh, well, as a fpc trunk user, I never remember when bugs are found and fixed (except those I report myself). Compile now, it bugs, update later, it's gone. If you wish, you can try trunk.