Develop Reference

Build failing when running an Android app with Bazel

I am trying to follow a tutorial to build an Android app using Bazel as given here:
https://docs.bazel.build/versions/master/tutorial/android-app.html. The app is being built successfully with the command:
bazel build //src/main:app
However, when I try to run the app using the command bazel mobile-install //src/main:app the build is failing with the following error:
INFO: Analyzed target //src/main:app (0 packages loaded, 0 targets configured).
INFO: Found 1 target...
ERROR: /Users/kanzashaikh/examples/android/tutorial/src/main/BUILD:1:15: Installing //src/main:app failed: (Exit 1): incremental_install failed: error executing command bazel-out/darwin-py2-opt-exec-2B5CBBC6/bin/external/bazel_tools/tools/android/incremental_install --output_marker bazel-out/darwin-fastbuild/bin/src/main/app_files/full_deploy_marker --dexmanifest ... (remaining 11 argument(s) skipped)
Traceback (most recent call last):
File "/private/var/tmp/_bazel_kanzashaikh/df06cea5303c222cca918b7a24c9d8ca/execroot/main/bazel-out/darwin-py2-opt-exec-2B5CBBC6/bin/external/bazel_tools/tools/android/incremental_install.runfiles/bazel_tools/tools/android/incremental_install.py", line 25, in
from concurrent import futures
ImportError: No module named concurrent
Target //src/main:app failed to build
Use --verbose_failures to see the command lines of failed build steps.
INFO: Elapsed time: 0.311s, Critical Path: 0.19s
INFO: 3 processes: 3 internal.
FAILED: Build did NOT complete successfully
How to solve this issue?

It looks like bazel is using python2 (the py2 from darwin-py2-opt-exec-2B5CBBC6 from the file paths), but from concurrent import futures in incremental_install.py doesn't work in python2.
If you don't have python3 installed, try installing it and seeing if that fixes the problem.
If you do have python3 installed, then check your bazel version, older versions of bazel might be defaulting to python2.

The C compiler "clang.exe" is not able to compile a simple test program

I am trying to compile shell script that compiles the C project library, but i am stuck at this when it comes to compile the nmake part.
I am using NDK 21 and cmake version is 3.10
I am using shell script using bash same as defined here, i want to compress this library as they showing in the docs running ./android.sh
Please check the link: https://github.com/tanersener/mobile-ffmpeg#52-build-scripts
here is the attached log:
DEBUG: Downloading library source: cpu-features
DEBUG: Checking if cpu-features is already downloaded at /d/Bilals/Projects/GithubProjects/mobile-ffmpeg/src/cpu-features
INFO: cpu-features library already downloaded
INFO: cpu-features already downloaded. Source folder found at /d/Bilals/Projects/GithubProjects/mobile-ffmpeg/src/cpu-features
-- Building for: NMake Makefiles
-- Check for working C compiler: D:/Bilals/PcBackupData/sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe
CMake Error: Generator: execution of make failed. Make command was: "nmake" "/NOLOGO" "cmTC_adf3f\fast"
-- Check for working C compiler: D:/Bilals/PcBackupData/sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe -- broken
CMake Error at D:/Bilals/PcBackupData/sdk/cmake/3.10.2.4988404/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake:52 (message):
The C compiler
"D:/Bilals/PcBackupData/sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe"
is not able to compile a simple test program.
It fails with the following output:
Change Dir: D:/Bilals/Projects/GithubProjects/mobile-ffmpeg/android/build/cpu-features/arm/CMakeFiles/CMakeTmp
Run Build Command:"nmake" "/NOLOGO" "cmTC_adf3f\fast"
The system cannot find the file specified
Generator: execution of make failed. Make command was: "nmake" "/NOLOGO" "cmTC_adf3f\fast"
CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:9 (project)
-- Configuring incomplete, errors occurred!
See also "D:/Bilals/Projects/GithubProjects/mobile-ffmpeg/android/build/cpu-features/arm/CMakeFiles/CMakeOutput.log".
See also "D:/Bilals/Projects/GithubProjects/mobile-ffmpeg/android/build/cpu-features/arm/CMakeFiles/CMakeError.log".
and here is my environmental variables

You should use Linux Make, not NMake. Generally speaking, these scripts were never tuned to run on Windows, in cygwin or mingw shell, even though I have run them in WSL (Ubuntu) bash.

Android chromium full browser apk build issues

I trying to build chromium android apk with this instruction
But on GN configuration step I have following problem after arguments file editing and saving
ERROR at //build/config/android/internal_rules.gni:1966:13: Script returned non-zero exit code.
exec_script("//build/android/gyp/find.py",
^----------
Current dir: /home/artem/chromium/src/out/Default/
Command: python -- /home/artem/chromium/src/build/android/gyp/find.py ../../third_party/android_tools/sdk/extras/google/google_play_services/libproject/google-play-services_lib/res
Returned 1.
stderr:
../../third_party/android_tools/sdk/extras/google/google_play_services/libproject/google-play-services_lib/res does not exist
See //build/config/android/rules.gni:634:3: whence it was called.
process_resources(process_resources_target_name) {
^-------------------------------------------------
See //third_party/android_tools/BUILD.gn:120:1: whence it was called.
android_resources("google_play_services_default_resources") {
^------------------------------------------------------------
See //base/BUILD.gn:1074:7: which caused the file to be included.
"//third_party/android_tools:cpu_features",
^-----------------------------------------
Then I try manually download google play services with command from this issue thread:
sudo ./build/android/play_services/update.py download
And get this warning:
Your version of the Google Play services library is not up to date. You might run into issues building or running the app. Please run `./build/android/play_services/update.py download` to retry downloading it.
After that I try to build full browser apk
ninja -C out/Default chrome_public_apk
and get error:
ninja: Entering directory `out/Default'
ninja: fatal: chdir to 'out/Default' - No such file or directory
Is there the way to fix this issue and build working apk file?

This works for me:
Run this command at chromium folder:
git rebase-update
gclient sync
Download google play services:
sudo ./build/android/play_services/update.py download
Configure GN: gn args opt/Full
Add this line to file: target_os="android"
Build apk with command: ninja -C opt/Full chrome_public_apk

Cross-compiling nfs-utils package for Android

I would like to add NFS support (both client and server) for my Android device. I have already built and inserted the required kernel modules (sunrpc.ko, lockd.ko, nfs.ko, exportfs.ko, nfsd.ko)
My Android phone now can act as an NFS client by mounting using Busybox. But to work as an NFS server, seems like some utilities (such as exportfs) and service daemons (portmap, nfsd, mountd, etc) are missing.
I figured I needed to install the nfs-utils package (http://nfs.sourceforge.net/).
I thought I should cross-compile it on my pc and then install it on my phone's Linux kernel. I'm not familiar with the whole cross-compiling thing. I'm trying to compile it on Ubuntu right now, and this is the command I'm using:
$ ./configure
--target=arm-linux-gnueabi
--host=arm-linux-gnueabi
--build=x86_64-linux
CC=/usr/bin/arm-linux-gnueabi-gcc
CPPFLAGS="-I/usr/arm-linux-gnueabi/include/"
CFLAGS="-nostdlib"
LDFLAGS="-Wl,-rpath-link=/usr/arm-linux-gnueabi/lib/ -L/usr/arm-linux-gnueabi/lib/"
LIBS="-lc"
This gives me the error msg:
checking for libwrap... configure: error: *** libwrap missing
config.log errors:
configure:3978: /usr/bin/arm-linux-gnueabi-gcc -V >&5
arm-linux-gnueabi-gcc: fatal error: no input files
configure:3978: /usr/bin/arm-linux-gnueabi-gcc -qversion >&5
arm-linux-gnueabi-gcc: fatal error: no input files
conftest.c:12:28: fatal error: ac_nonexistent.h: No such file or directory
conftest.c:55:28: fatal error: sys/capability.h: No such file or directory
I have the gcc-arm-linux-gnueabi package installed, but I guess there are some problems with building/linking with dependency libraries I don't really understand. Should they be cross-compiled too? How can I do that? And will I need to insert these libraries into my phone for NFS to run properly?
I'm completely new to this so any help would be greatly appreciated.

You have a dependency of tcp-wrappers which means you must first build and install tcp wrappers.
Alternatively, you can pass this option to ./configure:
--without-tcp-wrappers \
Also, you can get a complete list of options:
./configure --help

Install Calabash-Android causes error on OS X Mavericks

I need some help with trying to install Calabash-Android. After installing rvm, home-brew, when I install Calabash i get a strange error:
sudo gem install calabash-android
Building native extensions. This could take a while...
ERROR: Error installing calabash-android:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
checking for main() in -lc... yes
creating Makefile
make "DESTDIR="
compiling gherkin_lexer_ar.c
ragel/i18n/ar.c.rl:440:1: warning: control may reach end of non-void function [- Wreturn-type]
}
^
ext/gherkin_lexer_ar/gherkin_lexer_ar.c:864:18: warning: unused variable 'lexer_en_main' [-Wunused-const-variable]
static const int lexer_en_main = 1;
^
2 warnings generated.
linking shared-object gherkin_lexer_ar.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line- argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: *** [gherkin_lexer_ar.bundle] Error 1
Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/gherkin-2.12.2 for inspection.
Results logged to /Library/Ruby/Gems/2.0.0/gems/gherkin- 2.12.2/ext/gherkin_lexer_ar/gem_make.out
doronkatz#Dorons-MacBook-Air ~ $ mkdir ~/android
doronkatz#Dorons-MacBook-Air ~ $ mkdir ~/android
mkdir: /Users/doronkatz/android: File exists
doronkatz#Dorons-MacBook-Air ~ $ sudo gem install calabash-android
Password:
Building native extensions. This could take a while...
ERROR: Error installing calabash-android:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
checking for main() in -lc... yes
creating Makefile
make "DESTDIR="
compiling gherkin_lexer_ar.c
ragel/i18n/ar.c.rl:440:1: warning: control may reach end of non-void function [-Wreturn-type]
}
^
ext/gherkin_lexer_ar/gherkin_lexer_ar.c:864:18: warning: unused variable 'lexer_en_main' [-Wunused-const-variable]
static const int lexer_en_main = 1;
^
2 warnings generated.
linking shared-object gherkin_lexer_ar.bundle
clang: error: unknown argument: '-multiply_definedsuppress' [-Wunused-command-line- argument-hard-error-in-future]
clang: note: this will be a hard error (cannot be downgraded to a warning) in the future
make: *** [gherkin_lexer_ar.bundle] Error 1
Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/gherkin-2.12.2 for inspection.
Results logged to /Library/Ruby/Gems/2.0.0/gems/gherkin- 2.12.2/ext/gherkin_lexer_ar/gem_make.out
Not sure what the error means, I have installed Xcode tools for mavericks as well. Any thoughts out there?

I had the same problem and I just found out a solution for this.
I found one related problem here:
http://techespanto.wordpress.com/2013/03/29/upgrade-ruby-version-on-mac-osx/
and it suggested I had to upgrade the ruby version on my machine. The first two commands in that link are not working, so I leave you here what I did:
Install the command line tools for mac with:
xcode-select --install
Install homebrew in your mac with:
ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"
Install rvm with:
\curl -L https://get.rvm.io | bash -s stable --rails --autolibs=enable
List the latest ruby versions with:
rvm list known
Install the latest ruby version with:
rvm install ruby-<version>
(for me it was ruby-2.1-head)
And that's all. Hope it works for you as well!

You can also try the solution from https://stackoverflow.com/a/22787223/1165581
I looked at the calabash-ios google group for you and I think I have the solution for your
Try installing it like this
sudo ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install calabash-cucumber
If that fails you can try to downgrade xcode from 5.1 to one of the previous(Preferences->Locations).
And the reference link