"Magic 7F45" error occurred when run MakeFile test on Linaro Android image.

[Botao]

On ARM Versatile Express A9 board with Linaro Android image:

https://android-build.linaro.org/builds/~linaro-android/vexpress-linaro-4.3-13.08-release/#build=1

"Magic 7F45" error occurred after run "MakeFile" test based on following procedures:

# cd /data/data
# busybox vi test.cpp
Then copy & paste following code to the file, save & quit.

#include <iostream>
int main(int argc, char **argv) {
    std::cout << "g++ works" << std::endl;
}

# busybox vi Makefile
Then copy & paste following code to the file, save & quit. Note: A Tab space is required at the beginning of the second line.

g++test: test.cpp
<Insert a Tab Here>$(CXX) -o $@ -c $<

# make
# ./g++test

Then I got:

/system/bin/sh: ./g++test: can't execute: Permission denied

So I tried to give it permission 777 and run again:

126|root@vexpress:/data/data # ls -l g++test
-rw------- root log 13264 2013-08-27 12:33 g++test
root@vexpress:/data/data # chmod +x g++test
Bad mode
10|root@vexpress:/data/data # busybox chmod +x g++test
root@vexpress:/data/data # ./g++test
/system/bin/sh: ./g++test: not executable: magic 7F45
1|root@vexpress:/data/data # ls -l g++test
-rwx------ root log 13264 2013-08-27 12:33 g++test
root@vexpress:/data/data # busybox chmod 777 g++test
root@vexpress:/data/data # ./g++test
/system/bin/sh: ./g++test: not executable: magic 7F45
1|root@vexpress:/data/data # ls -l g++test
-rwxrwxrwx root log 13264 2013-08-27 12:33 g++test
root@vexpress:/data/data #

The error information "magic 7F45" continuously shows. This issue is also observed on other Linaro Android images, like TI Panda, Samsung Arndale, galaxy_nexus.

the isuue reproduced with the builds

https://android-build.linaro.org/builds/~linaro-android/galaxynexus-linaro-13.08-release/#build=1
https://android-build.linaro.org/builds/~linaro-android-member-ti/panda-linaro-13.08-release/#build=1

[Soumya Basak (soumya-basak)]

the same issue obbserved with Linaro android Jellybean 4.3 arndale 13.08 release builds,

https://android-build.linaro.org/builds/~linaro-android/arndale-linaro-13.08-release/#build=1

[Tixy (Jon Medhurst) (tixy)]

The test Makefile is wrong, the '-c' option imeans 'Compile and assemble, but do not link'
That is why the files didn't have executable permissions as well.

[Botao (botao-sun)]

OK, and the test description I used is the one I received from Bero 3 months ago. Bero, would you send me a corrected MakeFile sample? Then I will re-run the test.

[Botao (botao-sun)]

Confirmed, after removed "-c" in MakeFile, test passed:

root@android:/data/data # ./g++test
g++ works

Validated on image:

https://android-build.linaro.org/builds/~linaro-android/vexpress-linaro-4.2.2-13.08-release/#build=1