[maemo-developers] The code using Libcurl can not be linked properly

[From: Yao Wang]

Thank you for your advices. I have fixed the problem according to guidelines
you provided.


On Mon, Oct 20, 2008 at 7:05 AM, Eero Tamminen <eero.tamminen at nokia.com>wrote:

> Hi,
>
> ext Yao Wang wrote:
>
>>    Everyone. I am developping an appliacation on CHINOOK.
>>    Because my code used some functions provided by Libcurl, I revised the
>> Makefile  to the following
>>
>>  CC = gcc
>>>
>>> CFLAGS = `pkg-config --cflags gtk+-2.0 hildon-1`  -ansi -Wall -ggdb
>>>
>>> CFLAGS_CURL = -I/scratchbox/devkits/maemo3-tools/include
>>>
>>> LIBS = `pkg-config --libs gtk+-2.0 hildon-1`
>>>
>>> LIB_CURL = -L/scratchbox/devkits/maemo3-tools/lib -lcurl -Wl,-rpath
>>> -Wl,/scratchbox/host_shared/lib/ -Wl,-rpath -Wl,/scratchbox/tools/lib/
>>> -Wl,-rpath -Wl,/scratchbox/devkits/maemo3-tools/lib/
>>> -L/scratchbox/devkits/maemo3-tools/lib -lidn -lssl -lcrypto -ldl -lssl
>>> -lcrypto -ldl -lz
>>>
>>
> You should never mix stuff for the target and stuff from the Scratchbox
> itself like this.
>
>
>  TARGET =        GalleryBrowser
>>>
>>> SOURCES = src/main.c src/xxxx.c
>>>
>>> $(TARGET): $(SOURCES)
>>>        $(CC) -o $(TARGET) $(SOURCES) $(CFLAGS) $(CFLAGS_CURL) $(LIBS)
>>> $(LIB_CURL)
>>>
>>>
>> The CFLAGS_CURL and LIB_CURL  are generated by curl-config.
>>
>> After compiling and linking, I got a error messege same as following link:
>>
>> https://bugs.maemo.org/show_bug.cgi?id=2261#add_comment
>>
>> Unfortuantely, no solution is provided in this page.
>>
>
> Just remove the curl-config from Scratchbox installation (as host tools
> override target tools for performance reasons) and install curl -dev
> package to your Scratchbox target.
>
>
>  Someone in this page mentioned to remove -lidn. When I removed the -lidn,
>> the linking process is OK. However, if I run the program, I will get a
>> error
>> messge:
>>
>> " relocation error: /scratchbox/host_shared/lib/libc.so.6: symbol
>> _dl_starting_up, version GLIBC_PRIVATE not defined in file ld-linux.so.2
>> with link time reference"
>>
>
> You're mixing libraries that bring in different C-libraries,
> the x86 Scratchbox target one, and the Scratchbox x86 host tools one.
>
>
>        - Eero
>
>
>
>  Thus, is there anyone who can help me?
>>
>> Thanks in advance.
>>
>
>


-- 
         Sincerely yours,

Yao Wang

Mobile Life Lab
Beijing University of Posts & Telecommunications
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