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System can't find specifed path ndkbuild in android

I want to build an ocr app in android.For that i am using tessaract library.I am following this turorial ocr tutoial it says follow below steps
Download the NDK & extract to C:\ drive-Done
Set NDK Path & Android SDK path to PATH variable in Enviorment Variable.-Done
Download tessaract library and extract it to C:-Done
open command line & go inside tessract folder ibn downloaded library.-
Write ndk-build-Not Done
When i write ndk-build it says the system can't find the specified path.
Please tell me how to resolve this issue.I have already spent lot of hard time on this.
Thanks in advance.

If you re-read the link you posted, you may notice this line from the author:
Attention: if you fail at any of the above steps, you are not ready for this shit yet. Better grab an introduction to android development course, read a book, then come back to this tutorial. You’ll just waste time and nerves and you’ll bitch about it in the comments that this crash, this doesn’t work. (PS. no, I will not send you the source code on your email, stop spamming k thx.)
You should seriously consider his advice - working with the Android NDK only gets more difficult from here.
You're probably getting that error message because cmd couldn't find the ndk-build program, which is located inside the root of android-ndk-r10e. Possible causes:
You made an error when editing your PATH variable - make sure each file path is separated by a semicolon and that you provided the full path to your NDK install.
Your PATH is too long - the max length is 260 characters. See this page for more info. tl;dr: prefix \?\ to your PATH to get around this length limit.
You had cmd open when you set the variables - try restarting the cmd
program or even restarting your machine.

missing a command building android kernel

I have been trying to build an android kernel for a certain device, the Huawei Vitria, they finally uploaded their kernel source about 2 months ago so I try to build it the normal way which fails so I fix the main errors I see and get the kernel to build finally but, then I notice one error while building. I look into this file and see that they are using a weird way of building I think instead of the normal defconfigs, using a generic defconfig then a configuration file to configure their devices ontop of that(they've done this before but not to this extent), which leads me to think I'm missing a command to select the device config ontop of the defconfig to set up the drivers, but don't know what command was used.
So might there be a way to find out the command by looking at these two files
https://raw.githubusercontent.com/KainXS/android_kernel_huawei_y301a2/jellybean/drivers/huawei/hsad/parse_product.pl
https://raw.githubusercontent.com/KainXS/android_kernel_huawei_y301a2/jellybean/drivers/huawei/hsad/parse_product_id.pl
thanks

I'm not sure how much help this is, but the first command seems to want to be called with a parameter of a path to an XML file.
./parse_product.pl /ab/cd/hw_xxy_configs.xml
PRODUCT: xxy
reads: '/ab/cd/hw_xxy_configs.xml'
It pulls out some data from that file and pastes it into a .c file which presumably goes into the build configuration.
So, you're looking for an XML file containing your product-name.
The second file calls the first repeatedly to generate a set of .c files. Now - this second script takes an XML file as an argument, but I'm afraid I can't tell what it might be called. The file looks like it should contain product names and board-ids if that is any help.

mk:1: *** missing separator. android NDK

I am trying to compile some source code but when i run the command
make -f android-9-armv7.mk
I get the following error
android-9-armv7.mk:1: * missing separator. Stop.
This is the contents of the file above:
And I have set the IMAGINE_PATH variable as well, cant seem to figure it out.
link ../imagine/make/shortcut/common-builds/android-9-armv7.mk
Compiling instructions
http://code.google.com/p/emu-ex-plus-alpha/wiki/Compiling
Imagine is locaed at C:/Imagine

I don't know where you've taken the sources, but all the android-9-armv7.mk files from different projects on that git has following content:
../imagine/make/shortcut/common-builds/android-9-armv7.mk
...there is no link keyword, which probably is why you get this error.
Also, please be informed that you're building this on Windows machine while documentation clearly states that it's supported only on Linux and Mac OS X.

Android NDK build: File not found Error

Need your guidance, I am writing one app in android with the help of native code which will communicate with CAN (Controller Area Network) port ; for that in my C code i used linux/can.h header file. and i am following "http://mobilepearls.com/labs/ndk-builder-in-eclipse/" this link to build my app. but one i set all thing i got bellow msg in eclipse console box
Compile thumb : can_port <= cansend.c
jni/cansend.c:14:23: fatal error: linux/can.h: No such file or directory
compilation terminated.
make: *** [obj/local/armeabi/objs/can_port/cansend.o] Error 1
One more thing, i am working on windows environment. But i don't think this may be cause.

It is correct that it is not a Windows/Linux problem. The simple problem is that compiler is unable to find the file can.h. Now, for your info, when the compiler starts compiling, it searches for its header files in the folder
C:\(path to NDK folder)\platforms\(android-version)\(arch)\usr\include\linux
Now, if there isn't a can.h there, the compiler will flag an error. So the best way is
Either copy can.h to the above path (not tested)
Modify your Makefile to path to the correct directory where this header file is kept
Hope this helps!

How to build OpenSSL on Android/Linux ?

Hi
I'm in need to build OpenSSL lib for Android NDK r5b, today it will be second day of my ... useles fight. Here is short list what i've done
Downloaded: https://github.com/fries/android-external-openssl/
As i found here on StackOverflow fixed .S <->.s problem
Crypto gets builded... until i get this message:
/prebuilt/windows/bin/arm-linux-androideabi-
SharedLibrary : libcrypto.so
arm-linux-androideabi-g++.exe: CreateProcess: No such file or directory
make: * [/cygdrive/c/AndroidDev/AndroidOpenSSL/obj/local/armeabi/libcrypto.so]
Error 1*
It's 10 years when i last time used make, and i was sure it's problem with g++ path. Added some debug to toolchain, and got:
TOOLCHAIN_NAME: arm-linux-androideabi-4.4.3
TOOLCHAIN_PREFIX: /cygdrive/c/Android_NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-
both looks fine for me, as /cygdrive/c/Android_NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/ does exist, and arm-linux-androideabi-g++.exe is right there :(
Any one ever had this same problem? I realy have no idea where to look any future :(
Will be appreciative for help

One solution is also to shorten the openssl build path, eg. from c:\code\openssl-android to just c:\ssl

Looks like only i had such problem. Here is a solution i found, mayby someone will figure out why this happend.
Saved command line to separate file called bild_data (output from ndk-build), then removed from it g++ call, this way my build file had only list of files and needed flags. Then i just executed from cygwin arm-linux-androideabi-g++ #build_data
After that i had my 'precious' libcrypto.so, ndk-build executed again with libcrypto.so alerdy builded from command line, builded openssl library.
For me it looks like command line that was over 31kb did not fit to cygwin buffer :(

I had the same problem building on Windows (cygwin), and shortening the path to the project directory (see mango's answer) is what worked for me.