[fpc-pascal] CThreads problem when cross-compiling to ARM/RPi.

Bruce Tulloch pascal at causal.com
Thu May 23 14:25:23 CEST 2013

Okay, so I'm not trying to link statically, not intentionally anyway.

Here's the command line from ppas.sh that produces this error:

/usr/local/opt/binutils/bin/arm-linux-ld \
--sysroot=/usr/local/opt/chroot/raspbian/rootfs \
--dynamic-linker=/lib/ld-linux-armhf.so.3 \
-s -L. -o arm-test-threads link.res

and the dynamic linker referred to is:

root at beria:/lib# file ld-linux-armhf.so.3
ld-linux-armhf.so.3: symbolic link to `arm-linux-gnueabihf/ld-2.13.so'
root at beria:/lib# file arm-linux-gnueabihf/ld-2.13.so
arm-linux-gnueabihf/ld-2.13.so: ELF 32-bit LSB shared object, ARM, version
1 (SYSV), dynamically linked,
BuildID[sha1]=0x40caad061df15685e213cec1e4dfe1ba5f67701c, stripped

Any clues? -b

On Thu, May 23, 2013 at 10:18 PM, Jonas Maebe <jonas.maebe at elis.ugent.be>wrote:

> On 23 May 2013, at 14:10, Bruce Tulloch wrote:
>  However, if I simply add this uses clause:
>> uses
>>  cthreads;
>> the program compiles fine but fails when linking:
>> Linking arm-test-threads
>> /usr/local/lib/fpc/2.7.1/
>> units/arm-linux/rtl/cthreads.**o: In function
>> 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
> Why/how are you trying to create a statically linked binary? As the
> message above explains, statically linking libdl relies on a bunch of
> library magic. At the very least you'll probably also have to link libc
> explicitly, but I would really recommend to link dynamically instead.
> Support for binaries statically linked against C libraries is generally
> very much untested, and known not to work on certain platforms (e.g.
> Linux/x86-64).
> Jonas
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