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I downloaded SDL 1.3 and tested it together with OpenGL ES on my android 2.2 device. It works fine but I don't get the outputs from the printf calls. I tried the commands below as mentioned at the android developer page but neither DDMS in Eclipse nor adb logcat reports the strings that the program writes using printf. I made sure to filter for the stdout tag.
$ adb shell stop
$ adb shell setprop log.redirect-stdio true
$ adb shell start
What am I missing or doing wrong?
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The regular output is sent to Standard Out (STDOUT) and the error messages are sent to Standard Error (STDERR). When you redirect console output using the > symbol, you are only redirecting STDOUT. In order to redirect STDERR, you have to specify 2> for the redirection symbol.
The I/O streams can be redirected by putting the n> operator in use, where n is the file descriptor number. For redirecting stdout, we use “1>” and for stderr, “2>” is added as an operator. We have created a file named “sample. txt” to store the redirected output in our current directory.
According to this presentation, log.redirect-stdio is for Dalvik output, to redirect C/C++ output (such as printf), you must install busybox on the device and use its xargs utility like this:
myprogram | xargs log
This obviously works for code that gets called as a standalone executable. If it's only for debugging purposes, you can write a tiny program to call your library and call that from your application using xargs.
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