Re: [Openzaurus-devel] [Gdal-dev] building gdal for OpenZaurus

[Yan S. <ya...@se...>]

Mateusz Loskot wrote:

>toolchain 3.5.4 includes gcc 2.95, am I right?
>This compiler is first quite strict in C++ code compilation.
>  
>
Actually it uses 3.3.4, but your fix works. :-)

>Could you replace lines 175 - 182 with following:
>
>#include <cctype>
>#include <cerrno>
>#include <cfloat>
>#include <climits>
>#include <cmath>
>#include <cstdlib> // this is most important!
>#include <cstring>
>
>Please, try to compile it now.
>If you will get errors about declarations not found, please add
>using namespace std;
>below these includes.
>
>  
>
Now I get a link failure at the very end:

| arm-linux-g++ -march=armv5te -mtune=xscale -shared -nostdlib 
/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/../../../../arm-linux/lib/crti.o 
/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/crtbeginS.o 
.libs/libgdal.la-2.o  -Wl,--rpath 
-Wl,/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/../../../../arm-linux/lib 
-Wl,--rpath 
-Wl,/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/../../../../arm-linux/lib 
-lpng -lz -lrt -ldl 
-L/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4 
-L/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/../../../../arm-linux/lib 
/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/../../../../arm-linux/lib/libstdc++.so 
-lm -lc -lgcc_s 
/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/crtendS.o 
/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/../../../../arm-linux/lib/crtn.o  
-march=armv5te -mtune=xscale -Wl,-soname -Wl,libgdal.so.1 -o 
.libs/libgdal.so.1.10.0
| 
/home/local/zaurus/tmp/cross/lib/gcc/arm-linux/3.4.4/../../../../arm-linux/bin/ld: 
cannot find -lpng
| collect2: ld returned 1 exit status
| make[1]: *** [libgdal.la] Error 1

Is there any reason why gdal is using -nostdlib?  Or is that an artifact 
of the OZ toolchain?

(cc to openzaurus - can someone from the OZ camp help me out?  How do I 
fix this?  I treid adding a LDFLAGS= to the bb file but that didn't 
help. The gdal configure doesn't recognize --with-extra-libs - but I 
shouldn't have to tell it where to find the standard crosschain libs...)

Thanks for all the help,

--Yan