RTOS/TDA2: opencv cross compile , missing bios cmake.

Hi Surya,

Thanks for the file.
I edited the path.
But when run, it stuck at endiness test.

Detected version of GNU GCC: 72 (702)
Check if the system is big endian
Searching 16 bit integer
CMake Error at /usr/share/cmake-2.8/Modules/TestBigEndian.cmake:44 (message):
no suitable type found
Call Stack (most recent call first):
CMakeLists.txt:527 (test_big_endian)



I read the cross compile document.
It seems TI have some patch.

7. Edit the cmakelists.txt if necessary (optional, not required, taken care in the patch)
a. Opencv performs tests to identify if the endianness is big endian. However, this test doesn’t run
b. So, similar to setting endianness to IOS and not performing test add the following line (search for BIGENDIAN)
i. If (IOS)…. Elseif(GENERIC) set(WORDS_BIGENDIAN 0)  (this is because A15 view memory in little endian fashion in TDA2xx)


Could you upload the patch?

Hi Surya,

The patch is working!
I can configure and generate cmake now!

However, when i try to crosscompile opencv i stuck at

In file included from /home/cheepeng/ti/ccsv8/tools/compiler/gcc-arm-none-eabi-7-2017-q4-major/arm-none-eabi/include/dirent.h:7:0,
from /home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:134:
/home/cheepeng/ti/ccsv8/tools/compiler/gcc-arm-none-eabi-7-2017-q4-major/arm-none-eabi/include/sys/dirent.h:10:2: error: #error "<dirent.h> not supported"
#error "<dirent.h> not supported"
^~~~~
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:140:43: error: 'DIR' has not been declared
static bool isDir(const cv::String& path, DIR* dir)


What do you think?

regards
Chee Peng

Hi Chee Peng,
Could you please try with tool chain "gcc-arm-none-eabi-4_9-2015q3" ?

Regards
Surya

Hi Chee Peng,
Are you able to compile with "gcc-arm-none-eabi-4_9-2015q3" ?

Regards
Surya

Hi Surya,

Thank you for suggestion
I using gcc-arm-none-eabi-4_9-2015q3, but still stuck at dirent,h

What do you think?

Best regards
CHee Peng


[ 16%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/split.cpp.obj
[ 16%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/downhill_simplex.cpp.obj
[ 16%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/tables.cpp.obj
[ 16%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/glob.cpp.obj
In file included from /home/cheepeng/ti/gcc-arm-none-eabi-4_9-2015q3/arm-none-eabi/include/dirent.h:6:0,
from /home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:134:
/home/cheepeng/ti/gcc-arm-none-eabi-4_9-2015q3/arm-none-eabi/include/sys/dirent.h:10:2: error: #error "<dirent.h> not supported"
#error "<dirent.h> not supported"
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:140:43: error: 'DIR' has not been declared
static bool isDir(const cv::String& path, DIR* dir)
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp: In function 'void glob_rec(const cv::String&, const cv::String&, std::vector<cv::String>&, bool)':
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:222:5: error: 'DIR' was not declared in this scope
DIR *dir;
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:222:10: error: 'dir' was not declared in this scope
DIR *dir;
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:225:42: error: 'opendir' was not declared in this scope
if ((dir = opendir (directory.c_str())) != 0)
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:230:39: error: 'readdir' was not declared in this scope
while ((ent = readdir (dir)) != 0)
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:232:39: error: invalid use of incomplete type 'struct glob_rec(const cv::String&, const cv::String&, std::vector<cv::String>&, bool)::dirent'
const char* name = ent->d_name;
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:223:12: error: forward declaration of 'struct glob_rec(const cv::String&, const cv::String&, std::vector<cv::String>&, bool)::dirent'
struct dirent *ent;
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:252:25: error: 'closedir' was not declared in this scope
closedir(dir);
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:255:21: error: 'closedir' was not declared in this scope
closedir(dir);
^
make[2]: *** [modules/core/CMakeFiles/opencv_core.dir/src/glob.cpp.obj] Error 1
make[1]: *** [modules/core/CMakeFiles/opencv_core.dir/all] Error 2

Hi Surya,

In my opinion gcc-arm-none-eabi-4_9-2015q3 is bare-metal without os.
Dirent,h operation is based on OS which is TI-RTOS.

I review document and found need Bios 6.45.01.29 (fail with 6.46.000.23)

May I know where can i find Bios 6.45.01.29?

Hi Chee Peng,
You can download Bios 6.45.01.29 from below TI link
software-dl.ti.com/.../index_FDS.html

Regards
Surya

Hi Surya,

Tried Bios 6.45.01.29.
Same error

[ 16%] Building CXX object modules/core/CMakeFiles/opencv_core.dir/src/glob.cpp.obj
In file included from /home/cheepeng/ti/gcc-arm-none-eabi-4_9-2015q3/arm-none-eabi/include/dirent.h:6:0,
from /home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:134:
/home/cheepeng/ti/gcc-arm-none-eabi-4_9-2015q3/arm-none-eabi/include/sys/dirent.h:10:2: error: #error "<dirent.h> not supported"
#error "<dirent.h> not supported"
^
/home/cheepeng/ti/opencv/tiopencv/modules/core/src/glob.cpp:140:43: error: 'DIR' has not been declared
static bool isDir(const cv::String& path, DIR* dir)


The file at
/home/cheepeng/ti/gcc-arm-none-eabi-4_9-2015q3/arm-none-eabi/include/sys/dirent.h
have some comment

/* <dirent.h> includes <sys/dirent.h>, which is this file. On a
system which supports <dirent.h>, this file is overridden by
dirent.h in the libc/sys/.../sys directory. On a system which does
not support <dirent.h>, we will get this file which uses #error to force
an error. */


Gcc-arm-none-eabi-4_9-2015q3 is bare-metal.
Dirent.h operation should be supplied by bios.....
What do you think?

regards
cheepeng