[LTIB] Cross-compiling external project with gnueabi

[Franz Trierweiler]

Hello,

LTIB uses by default on the host the gnueabi toolchain. I do not know if this is really the right place to post such a request, so please be indulgent if this is not relevant but it relates to cross-compilation for the i.MX25. If by chance you know where to post the request to a better place, please tell me.

I have been for a while using the gnueabi toolchain for my own C projects (in this case, I do not prepare a LTIB package but generate on my own a makefile). For this, I always set myself the right path to the gnueabi gcc compiler an other tools in the Makefile (arm-none-linux-gnueabi-gcc) and this works fine.

Recently, I have been trying to compile sources taken from a software repo and which is not included by default in the LTIB packages. As many open-source configurable projects, it is required to first configure the Makefiles before launching the first "make". The sources I am trying to build are the project "Image Magick".

Thus, I have configured the sources with the typical ./configure command in order to build the right Makefiles.

6 years ago, a contributor to the Image Magick mailing list advised to configure like this:

./configure CC=arm-linux-gcc CFLAGS="" CXX=arm-linux-g++
CXXFLAGS="" LDFLAGS="-L/usr/local/arm/2.95.3/arm-linux/lib"
--without-x --host=arm --without-gs-font-dir --without-perl --without-zlib

I have changed the CC and LDFALGS for adaptation to my Freescale cross chain:

For example, I have set: 

CC=/opt/freescale/usr/local/gcc-4.1.2-glibc-2.5-nptl-3/arm-none-linux-gnueabi/bin/rm-none-linux-gnueabi-gcc

There happens that the project seems to compile properly but I got HUGE binary files. For example, the convert command is about 4.5 MB whereas it is very very smaller with shared libs on Ubuntu. I guess that shared libraries have not been used during the build! (the file command told me it is a bin with static libs) I am unable to instruct the configure process to use shared libraries. Is there a way of doing it? Do I have to build those shared libraries somewhere and from which sources?

Moreover, I noticed that the command is not able to convert a rgb file to a jpeg file on the ARM whereas this works fine on the Ubuntu. Every rgb file is converted into a... rgb file this why I suspect some missing libraries not to be called without any warning from the app.

My cross system bins are located here as you might know:

address@hidden:/opt/freescale/usr/local/gcc-4.1.2-glibc-2.5-nptl-3/arm-none-linux-gnueabi/bin$ ls -all

total 7896

drwxr-xr-x  2 root root   4096 2010-03-31 23:17 .

drwxr-xr-x 11 root root   4096 2010-03-31 23:17 ..

-rwxr-xr-x  1 root root 465401 2007-05-09 20:27 arm-none-linux-gnueabi-addr2line

-rwxr-xr-x  2 root root 436451 2007-05-09 20:27 arm-none-linux-gnueabi-ar

-rwxr-xr-x  2 root root 746982 2007-05-09 20:27 arm-none-linux-gnueabi-as

-rwxr-xr-x  2 root root 136447 2007-05-09 20:27 arm-none-linux-gnueabi-c++

-rwxr-xr-x  1 root root 464829 2007-05-09 20:27 arm-none-linux-gnueabi-c++filt

-rwxr-xr-x  1 root root 132718 2007-05-09 20:27 arm-none-linux-gnueabi-cpp

-rwxr-xr-x  2 root root 136447 2007-05-09 20:27 arm-none-linux-gnueabi-g++

-rwxr-xr-x  2 root root 132335 2007-05-09 20:27 arm-none-linux-gnueabi-gcc

-rwxr-xr-x  2 root root 132335 2007-05-09 20:27 arm-none-linux-gnueabi-gcc-4.1.2

-rwxr-xr-x  1 root root  16302 2007-05-09 20:25 arm-none-linux-gnueabi-gccbug

-rwxr-xr-x  1 root root  27379 2007-05-09 20:27 arm-none-linux-gnueabi-gcov

-rwxr-xr-x  1 root root 526172 2007-05-09 20:27 arm-none-linux-gnueabi-gprof

-rwxr-xr-x  2 root root 733879 2007-05-09 20:27 arm-none-linux-gnueabi-ld

-rwxr-xr-x  2 root root 476345 2007-05-09 20:27 arm-none-linux-gnueabi-nm

-rwxr-xr-x  1 root root 621110 2007-05-09 20:27 arm-none-linux-gnueabi-objcopy

-rwxr-xr-x  2 root root 717557 2007-05-09 20:27 arm-none-linux-gnueabi-objdump

-rwxr-xr-x  2 root root 436451 2007-05-09 20:27 arm-none-linux-gnueabi-ranlib

-rwxr-xr-x  1 root root 238367 2007-05-09 20:27 arm-none-linux-gnueabi-readelf

-rwxr-xr-x  1 root root 416980 2007-05-09 20:27 arm-none-linux-gnueabi-size

-rwxr-xr-x  1 root root 416428 2007-05-09 20:27 arm-none-linux-gnueabi-strings

-rwxr-xr-x  2 root root 621110 2007-05-09 20:27 arm-none-linux-gnueabi-strip

I wonder whether the CXXFLAGS must be instructed with my g++ compiler bin or if gcc is smart enough to use g++ without this flag (the initial contributor to this list did not instruct this flag).

Thanks for your help,

Franz

By the way, is-not there another kind of rgb2jpeg conversion tool available in the LTIB packages? (please do not tell me "gstreamer" - the jpeg conversion does not work on  my i.MX25).