How To Change Built-in C/c++ Paths Pointing To A Deleted Android-ndk-r9 Installation?

I recently upgraded my NDK from android-ndk-r9 to android-ndk-r10 (r10d to be exact). Eclipse is 4.4 Luna (Luna Service Release 1 (4.4.1); Build id: 20140925-1800). Eclipse is full

Solution 1:

Where is the setting coming from?

It appears the information is held in the project's pathInfo file. Below, the project is a sample JNI project called AndroidPrng.

$ cat /Users/jww/Eclipse/.metadata/.plugins/com.android.ide.eclipse.ndk/AndroidPrng.pathInfo 
t,1421045575000
i,/opt/android-ndk-r9/sources/cxx-stl/stlport/stlport
i,/usr/local/cryptopp/android-armeabi/include
i,/opt/android-ndk-r9/sources/cxx-stl/system/include
i,/usr/local/cryptopp/android-armeabi/include/cryptopp
i,jni
i,/opt/android-ndk-r9/platforms/android-14/arch-arm/usr/include
i,/usr/local/cryptopp/android-x86/include
i,/usr/local/cryptopp/android-x86/include/cryptopp
i,/opt/android-ndk-r9/platforms/android-14/arch-x86/usr/include
i,/usr/local/cryptopp/android-mips/include
i,/usr/local/cryptopp/android-mips/include/cryptopp
i,/usr/local/cryptopp/android-armeabi-v7a/include
i,/usr/local/cryptopp/android-armeabi-v7a/include/cryptopp
i,/opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.6/include
i,/opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.6/include-fixed
i,/opt/android-ndk-r9/platforms/android-14/arch-mips/usr/include
d,__STDC__,1
d,__INT64_MAX__,9223372036854775807LL
d,__LDBL_HAS_QUIET_NAN__,1
d,__WINT_TYPE__,unsigned int
d,__ORDER_LITTLE_ENDIAN__,1234
d,__DEC64_MAX_EXP__,385
d,__UINT_LEAST32_TYPE__,unsigned int
d,__UINT_FAST64_TYPE__,long long unsigned int
d,__GXX_WEAK__,1
...

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I've grepped the following directories ... "My Eclipse workspace, ~/.eclipse, " ...

There were two problems here. First, the project is located on my desktop, and not my workspace directory. Second, the 100's of entries in the log files under org.eclipse.cdt.ui drowned out the entries 15 entries for com.android.ide.eclipse.ndk.

So, before you grep, perform:

rm Users/jww/Eclipse/.metadata/.plugins/org.eclipse.cdt.ui/*.log

That will produce manageable grep results.

---

And how do I change it?

Exercise left to the reader.

You can edit by hand; or you can delete it and Eclipse will recreate it with the new NDK-related paths.

Solution 2:

OP probably figured this out already but adding this here just for future reference.

Eclipse (currently) has issues with the r10d version (see the related discussion in https://stackoverflow.com/a/28108753/1591421). First, if possible one should rollback to an earlier version of the Android NDK (e.g. r10c seems to work just fine) and then make Eclipse point to the newly installed version of the NDK: Preferences -> Android -> NDK -> NDK Location. To let Eclipse pick up these changes the project needs to be deleted from the workspace and then added back (at least I had to). After the project has been re-imported one should see the NDK paths updated: Project -> Properties -> C/C++ General -> Paths and Symbols. Rebuilding the C/C++ Index (Project -> C/C++ Index -> Rebuild) won't hurt either :)