After doing some research (mostly reading http://wiki.lazarus.freepascal.org/Setup_Cross_Compile_For_ARM) and experimenting, I am now cross compiling for ARM Linux from inside an x86 Linux VM. I followed the instructions in the aforementioned link with a few minor adjustments for my environment, and it's working quite nicely. I am able to compile FPC programs which use various RTL units and everything seems to compile fine and then rune fine when copied over to my Nokia N800.
The way I set it up was to create a "/usr/local/bin/arm" directory, with symlinks in that directory like this: $ ls -l total 0 lrwxrwxrwx 1 root root 15 2010-05-24 08:53 ar -> ../arm-linux-ar lrwxrwxrwx 1 root root 15 2010-05-24 08:53 as -> ../arm-linux-as lrwxrwxrwx 1 root root 15 2010-05-24 08:53 ld -> ../arm-linux-ld which point to the arm-linux-* binaries that were installed when I compiled and installed binutils for arm. I also have a /usr/local/lib/arm directory containing the contents of my /lib and /usr/lib directories which I copied over from my N800. Then, in fpc.cfg I have: #ifdef cpuarm -Xd -XP/usr/local/bin/arm/ -Fl/usr/local/lib/arm/ #endif so that the regular library paths aren't used (-Xd), the binutils from /usr/local/bin/arm/ are used (-XP) and the libraries in /usr/local/lib/arm/ are found (-Fl). This all seems to work fine. FWIW, the command I used to do the crossinstall was: sudo make crossinstall CPU_TARGET=arm OS_TARGET=linux CROSSBINDIR=/usr/local/bin/arm/ OPT=-dFPC_ARMEL INSTALL_PREFIX=/usr/local When I compile simple test programs everything is found Ok, even when using a unit like systemlog which causes libc to be linked. However, when I try to compile something that uses cthreads, I get the following errors: $ fpc -Parm runthreads.pas Free Pascal Compiler version 2.4.1 [2010/05/24] for arm Copyright (c) 1993-2009 by Florian Klaempfl Target OS: Linux for ARMEL Compiling runthreads.pas runthreads.pas(25,10) Warning: Local variable "s" does not seem to be initialized Assembling runthreads Linking runthreads /usr/local/bin/arm/ld: warning: link.res contains output sections; did you forget -T? /usr/local/lib/fpc/2.4.1/units/arm-linux/rtl/cthreads.o: In function `CTHREADS_LOADPTHREADS$$BOOLEAN': cthreads.pp:(.text.n_cthreads_loadpthreads$$boolean+0xc): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking /usr/local/lib/arm//libdl.a(dlopen.o): In function `dlopen': (.text+0xc): undefined reference to `__dlopen' /usr/local/lib/arm//libdl.a(dlclose.o): In function `dlclose': (.text+0x0): undefined reference to `__dlclose' /usr/local/lib/arm//libdl.a(dlsym.o): In function `dlsym': (.text+0xc): undefined reference to `__dlsym' /usr/local/lib/arm//libdl.a(dladdr.o): In function `dladdr': (.text+0x0): undefined reference to `__dladdr' runthreads.pas(28,45) Error: Error while linking runthreads.pas(28,45) Fatal: There were 1 errors compiling module, stopping Fatal: Compilation aborted Error: /usr/local/bin/ppcarm returned an error exitcode (normal if you did not specify a source file to be compiled) Here's what I have pthread-related in my /usr/local/lib/arm directory: $ ll libpthread* -rw-r--r-- 1 root root 77k 2010-05-24 10:27 libpthread-2.5.so -rw-r--r-- 1 root root 268k 2010-05-24 10:27 libpthread.a -rw-r--r-- 1 root root 1.3k 2010-05-24 10:27 libpthread_nonshared.a -rw-r--r-- 1 root root 245 2010-05-24 10:40 libpthread.so lrwxrwxrwx 1 root root 17 2010-05-24 10:40 libpthread.so.0 -> libpthread-2.5.so $ cat libpthread.so /* GNU ld script Use the shared library, but some functions are only in the static library, so try that secondarily. */ OUTPUT_FORMAT(elf32-littlearm) GROUP ( /usr/local/lib/arm/libpthread.so.0 /usr/local/lib/arm/libpthread_nonshared.a ) Does anyone have any suggestions? Thanks, -SG -- This email is fiction. Any resemblance to actual events or persons living or dead is purely coincidental. Seth Grover sethdgrover[at]gmail[dot]com _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
