ndk-build does not find header files in example code

[Seth Tucker]

Hi,

   I'm trying to get the eclipse tool-chain working because I need to work on the NDK. So for it's going terribly. After a lot of effort I was able to get the SDK compiling and running, but the NDK has a problem that I am totally unable to resolve. 

Every time I try to build the hello-jni example app, Eclipse throws a "can't find string.h no such file or directory." error. That's a standard header file, so I have no idea where the compiler typically looks for it, and I have no idea where the configuration for NDK build is buried, or why it's broken. I am on Ubuntu 15.10, using eclipse 4.5.1.  Any ideas?

If not, can anyone share a working ndk configuration? Downloading the latest versions of everything didn't seem to be very helpful for me.

Thanks!

[GameCodingNinja]

Yeah, it's a pain to get everything working at first. Perhaps my settings might shed some light on what you might be missing. I believe you have to specify that you want to use STL. There's a few options like stlport_static or gnustl_static.

Application.mk

# Uncomment this if you're using STL in your project
# See CPLUSPLUS-SUPPORT.html in the NDK documentation for more information
# APP_STL := stlport_static
# APP_ABI := armeabi armeabi-v7a x86
APP_STL := gnustl_static
APP_ABI := armeabi-v7a
# Needed for debugging
APP_PLATFORM := android-10

Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := template

SDL_PATH := ../SDL
ASCRIPT_PATH := $(LOCAL_PATH)/../angelscript

LOCAL_C_INCLUDES := \
    $(SDL_PATH)/include \
    $(LOCAL_PATH)/library \
    $(LOCAL_PATH)/../boost \
    $(ASCRIPT_PATH)/add_on

LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)

LOCAL_CXXFLAGS := -std=gnu++11 -fexceptions

LOCAL_SRC_FILES := \
    $(SDL_PATH)/src/main/android/SDL_android_main.c \
    $(subst $(LOCAL_PATH)/,, \
    $(wildcard $(LOCAL_PATH)/source/game/*.cpp) \
    $(wildcard $(LOCAL_PATH)/source/smartGUI/*.cpp) \
    $(wildcard $(LOCAL_PATH)/source/state/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/gui/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/objectdata/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/system/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/managers/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/physics/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/2d/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/common/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/utilities/*.cpp) \
    $(wildcard $(LOCAL_PATH)/library/soil/*.c) \
    $(wildcard $(LOCAL_PATH)/library/script/*.cpp))

LOCAL_SHARED_LIBRARIES := SDL2 SDL2_mixer Box2D angelscript

LOCAL_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -llog -landroid

include $(BUILD_SHARED_LIBRARY)

Also

[Alex Cohn]

Maybe this SO article will be relevant for you: http://stackoverflow.com/a/16891713/192373

[Seth Tucker]

I tried explicitly specifying that with the APP_STL := gnustl_static command.

The thing is, this is just the most basic example app, so if this isn't working, so it really only needs to find string.h. I can see string.h in the NDK directory, but it fails even when I run ndk-build from the command line. Nothing I have done helps at all. I think it may not be worth trying to deal with. If it's this much trouble with a simple example, I don't think it's going to be practical to work with an sdk.

Thanks,

Seth

[GameCodingNinja]

Have you tried these includes?

#include <string>
#include <cstring>

You may not be able to include string.h specifically. What is it you are trying to accomplish? Perhaps you can find similar string related calls under the above includes?