Hi!

I am trying crosscompile my commandline application from Win32 to linux. I have cross binutils, compiled linux RTL and other packages... so, I have not any problem with crosscompile. I have a problem with final linking of crosscompiled application only.

I have a few '.so' from Mandrake9 in my LIB directory, but linking producing next errors:

C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libpthread.so: undefined reference to '
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libdl.so: undefined reference to '
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'
C:\FPC\2.0.0\lib\/libc.so: undefined reference to
'

Have you some ideas? Have I missed somethink?

I call it by commandline:
fpc -Tlinux webtouch -XPi386-linux-

Thanks!

Looks like the dynamic linker loader (ld-linux.so) is missing

I have it in my lib directory... ld-linux.so and ld-linux.so.2 (copy of ld-linux.so)

I compiled Lazarus from win32 to Linux/FreeBSD a while ago, here are my summary notes:

To compile linux lazarus on windows: (the procedure from freebsd will not differ much, the cprt0 copying is not needed for FreeBSD)

Requirements:
- FPC 1.9.6 or higher. 1.9.4 might work, but untested.
- ftp://freepascal.stack.nl/pub/fpc/contrib/cross/mingw/binutils-2.15-win32-i386-linux.zip
- A FPC CVS repository. (anything 1.9.6+ that is buildable will do)
- a lazarus tree. (anything buildable from the same period will do)
- Lots of libraries from the target linux system. One of the FPC servers is some SUSE, that's where I got the list below.

1) Download ftp://freepascal.stack.nl/pub/fpc/contrib/cross/mingw/binutils-2.15-win32-i386-linux.zip
2) extract it and move the i386* files to <fpcbindir>\bin\i386-win32 (e.g. c:\pp\bin\i386\win32)
3) enter FPC source dir
4) make clean
5) make OS_TARGET=linux all
6) make OS_TARGET=linux install INSTALL_PREFIX=<fpcbindir>
7) prepare the lib directory as in below instructions, I used d:\fpc\linuxlib to store them.
8) go to <fpcbindir>\units\i386-linux\rtl and copy cprt21.o over cprt0.o
9) enter lazarus dir
10) edit lazarus.pp and add {$linklib dl} and {$linklib gmodule} somewhere in the source.
11) make OS_TARGET=linux all OPT="-gl -Fld:\fpc\linuxlib -Xr/usr/lib -FL/usr/lib/ld-linux.so.2 "

If some linker error (most specifically linker can't find -l<something>) then

12) manually edit link.res if needed (see below for gtk remarks) and adapt the -l<x> names at the bottom of the files. I had to add -1.2 to all gtk libs, to keep them apart from gtk2
13) run ppas.bat to restart the linker

----------- Libraries

These are the libraries I collected for both lazarus and the textmode IDE (lazarus doesn't need pthread).

I gathered these from the target system, and renamed all from lib<name>.so.x.y to lib<name>.so.

libgcc.a and a few others are easiest found by doing gcc -v and look for a line like

"Reading specs from /usr/lib/gcc-lib/i486-linux/3.3.5/specs"

then some of the libs are in /usr/lib/gcc-lib/i486-linux/3.3.5/ Some other good locations are /lib /usr/lib /usr/local/lib /usr/x11R6/lib and /opt/gnome/lib

libpthread.so.0
libdl.so
libc.so
ld-linux.so.2
crtbegin.o
crtbeginS.o
crtbeginT.o
crtend.o
crtendS.o
crtn.o
crti.o
libgcc.a
libX11.so
libXi.so
libglib-1.2.so
libgmodule-1.2.so.0
libgdk_pixbuf.so
libgdk-1.2.so
libgtk-1.2.so
libXext.so
libm.so
libdl.so.2
libgmodule-1.2.so

Note that some directories are duplicate, with a suffix and not. These are required because some other lib has a dependancy on that exact name (so the form lib<name>.so.x) we can't symlink on windows, so I simply copy it.

Making mistakes with renaming is not that bad, there will be chances to fix it. Make sure all crt* and a file "libc.so" are available, otherwise generating link.res will go wrong. (Yes, Peter, that was my fault :-)

In my case compilation for step 11 will go ok, but the linker will complain it can't find libgtk.so and the other libraries marked with -1.2 This is because on the target system, libgtk is gtk 2.0, while we want gtk1.2 for lazarus.

To fix this I manually added -1.2 to the corresponding -l lines in the bottom of the link.res file that was generated by step 11

I know this your message before, however it not solve my problems. :-(

Another option is to use CoLinux, which let's you compile anything once you just get Linux up and running on windows. I found was a lot less work in the end. You have access to all linux related commands and linux related everything, since you are essentially running linux in windows.

|
| Requirements:
| - FPC 1.9.6 or higher. 1.9.4 might work, but untested. | -
ftp://freepascal.stack.nl/pub/fpc/contrib/cross/mingw/binutils-2.15-win32-i386-l inux.zip
| - A FPC CVS repository. (anything 1.9.6+ that is buildable will do) | - a lazarus tree. (anything buildable from the same period will do) | - Lots of libraries from the target linux system. One of the FPC servers is some SUSE,
| that's where I got the list below.
|
| 1) Download
ftp://freepascal.stack.nl/pub/fpc/contrib/cross/mingw/binutils-2.15-win32-i386-l inux.zip
| 2) extract it and move the i386* files to <fpcbindir>\bin\i386-win32 (e.g. c:\pp\bin\i386\win32)
| 3) enter FPC source dir
| 4) make clean
| 5) make OS_TARGET=linux all
| 6) make OS_TARGET=linux install INSTALL_PREFIX=<fpcbindir> | 7) prepare the lib directory as in below instructions, I used d:\fpc\linuxlib to store them.
| 8) go to <fpcbindir>\units\i386-linux\rtl and copy cprt21.o over cprt0.o | 9) enter lazarus dir
| 10) edit lazarus.pp and add {$linklib dl} and {$linklib gmodule} somewhere in the source.
| 11) make OS_TARGET=linux all
OPT="-gl -Fld:\fpc\linuxlib -Xr/usr/lib -FL/usr/lib/ld-linux.so.2 " |
| If some linker error (most specifically linker can't find -l<something>) then |
| 12) manually edit link.res if needed (see below for gtk remarks) and adapt the -l<x> names at the bottom of the files. I had to add -1.2 to all gtk | libs, to keep them apart from gtk2
| 13) run ppas.bat to restart the linker
|
| ----------- Libraries
|
| These are the libraries I collected for both lazarus and the textmode IDE | (lazarus doesn't need pthread).
|
| I gathered these from the target system, and renamed all from | lib<name>.so.x.y to lib<name>.so.
|
| libgcc.a and a few others are easiest found by doing gcc -v and look for a line like
|
| "Reading specs from /usr/lib/gcc-lib/i486-linux/3.3.5/specs" |
| then some of the libs are in /usr/lib/gcc-lib/i486-linux/3.3.5/ | Some other good locations are /lib /usr/lib /usr/local/lib /usr/x11R6/lib and /opt/gnome/lib
|
| libpthread.so.0
| libdl.so
| libc.so
| ld-linux.so.2
| crtbegin.o
| crtbeginS.o
| crtbeginT.o
| crtend.o
| crtendS.o
| crtn.o
| crti.o
| libgcc.a
| libX11.so
| libXi.so
| libglib-1.2.so
| libgmodule-1.2.so.0
| libgdk_pixbuf.so
| libgdk-1.2.so
| libgtk-1.2.so
| libXext.so
| libm.so
| libdl.so.2
| libgmodule-1.2.so
|
| Note that some directories are duplicate, with a suffix and not. These are required because some other lib has a dependancy on that | exact name (so the form lib<name>.so.x) we can't symlink on windows, so I simply copy it.
|
| Making mistakes with renaming is not that bad, there will be chances to fix it. Make sure all crt* and a file "libc.so" are available, otherwise | generating link.res will go wrong. (Yes, Peter, that was my fault :-) |
| In my case compilation for step 11 will go ok, but the linker will complain it can't find libgtk.so and the other libraries marked with -1.2 | This is because on the target system, libgtk is gtk 2.0, while we want gtk1.2 for lazarus.
|
| To fix this I manually added -1.2 to the corresponding -l lines in the bottom of the link.res file that was generated by step 11 |
| _______________________________________________
| fpc-pascal maillist -
| http://lists.freepascal.org/mailman/listinfo/fpc-pascal

So you have a -FL parameter?

I have solution! :-)

I must add ld-linux explicitly by -k parameter first! After this linking is OK. -k parameters seems to be a trick what I missed before...

Just linked executable is not runnable under linux until I add -FL. (because otherwise it is linked with ld-linux.so.1)

So, my commandline is now:

fpc webtouch -Tlinux -XPi386-linux- -kc:\fpc\2.0.0\lib\ld- linux.so.2 -FL/lib/ld-linux.so.2

(and I have -Fl in FPC config, of course!)

My appliation run on linux wery well now.
Thanks for your comments!