using c++11 with ndk

Question

i am trying to use some dnn features from dlib in https://github.com/tzutalin/dlib-android but i am always getting errors like

error: no member named 'to_string' in
      namespace 'std'

and many more syntax errors

my application.mk file is like this

NDK_TOOLCHAIN_VERSION := clang
APP_ABI := armeabi-v7a arm64-v8a x86 x86_64
APP_CPPFLAGS := -std=c++11 -frtti -fexceptions
APP_PLATFORM := android-8
APP_STL := gnustl_static
#APP_CFLAGS+=-DDLIB_NO_GUI_SUPPORT=on
#APP_CFLAGS+=-DDLIB_PNG_SUPPORT=off
APP_CFLAGS+=-DDLIB_JPEG_SUPPORT=on
APP_CFLAGS+=-DDLIB_JPEG_STATIC=on

According to me c++11 should be working ..I dont get where's the problem

You might have to use a different STL implementation. See e.g. http://stackoverflow.com/a/18124627/1524450 — Michael, Mar 20 '17 at 13:41
well that did solved the particular problem surprisingly but now opencv compilation is giving error of std functions being absent.No idea why take a look at this-> std::range_error::range_error(std::string const&) — Arpit Khurana, Mar 20 '17 at 15:51

Dan Albert · Accepted Answer · 2018-02-01T19:10:07.247

2

This is https://github.com/android-ndk/ndk/issues/82

The fix for this is to switch from gnustl to libc++, but note that libc++ isn't as stable as gnustl is yet (working on fixing this ASAP, should be ready by the time r15 hits stable).

EDIT: As of NDK r16 libc++ is the recommended STL. Switch to using libc++ (see our docs) for full C++11 (and beyond) support.

edited Feb 01 '18 at 19:10

answered Mar 20 '17 at 20:33

Dan Albert

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Well..I am r14 and it's showing invalid value for stl – Arpit Khurana Mar 21 '17 at 01:56
Ok so waiting for r15 – Arpit Khurana Mar 21 '17 at 02:30
@ArpitKhurana Any solution now? – Gaurav Gupta Jan 31 '18 at 16:13
The solution is to use libc++. – Dan Albert Feb 01 '18 at 19:08

using c++11 with ndk

1 Answers1