Develop Reference

recipe for target 'ninja_wrapper' failed / flex core dumps

First time android builder here. I used to do a lot of roll your own back on FreeBSD in the day. Getting back into geekdom with android.
I am trying to build android-7.0.0_r14 for the Nexus 6 NBD90Z to run under emulation. I plan to eventually build for my actual phone and this config is pretty close. I am building on ubuntu 18.04 LTS which is newer than what the docs recommend. Maybe that is a bit adventurous.
Here is what I get when I run make.
... snip
build/core/base_rules.mk:316: warning: ignoring old commands for target
out/target/product/shamu/system/lib/soundfx/libqcomvoiceprocessing.so'
Starting build with ninja
ninja: Entering directory.'
ninja: warning: multiple rules generate out/target/product/shamu/system/etc/gps.conf. builds involving this target will not be correct; continuing anyway [-w dupbuild=warn]
[ 0% 1/35600] Lex: libaidl-common <= system/tools/aidl/aidl_language_l.ll
FAILED: /bin/bash -c "prebuilts/misc/linux-x86/flex/flex-2.5.39 -oout/host/linux-x86/obj/STATIC_LIBRARIES/libaidl-common_intermediates/aidl_language_l.cpp system/tools/aidl/aidl_language_l.ll"
flex-2.5.39: loadlocale.c:130: _nl_intern_locale_data: Assertion `cnt < (sizeof (_nl_value_type_LC_TIME) / sizeof (_nl_value_type_LC_TIME[0]))' failed.
Aborted (core dumped)
ninja: build stopped: subcommand failed.
build/core/ninja.mk:148: recipe for target 'ninja_wrapper' failed
make: *** [ninja_wrapper] Error 1
A core dump for flex was not produced in spite of the error message given.
out/host/linux-x86/obj/STATIC_LIBRARIES/libaidl-common_intermediates/aidl_language_l.cpp does not exist. That entire folder is empty. It would seem that something is not downloading/copying the aidl_language_l.cpp.
Any ideas on what I might have messed up?
I am still a little confused at the complexity of git/repo/make/ninja/soong/lunch to conduct a build. It is likely that I missed something obvious.
Thanks,
Jason C. Wells

Just replace your make by export LC_ALL=C make or put the export in your .bashrc

After I looked at this a little closer I realized the prebuilt prebuilts/misc/linux-x86/flex/flex-2.5.39 would dump core with no arguments. I created a soft link to /usr/bin/flex. Compilation seems to be proceeding.
I haven't answered why the prebuilt was dumping. My goal is to compile android, not troubleshoot the tools.

I performed Snorky's steps. I deleted my output directory for libaidl-common_intermediates. I deleted my soft link and restored the android tree version of flex. I re-ran make at the top of the local repo. The build proceeded past the error above and stopped at a new error. It appears that Snorky's answer worked.
Doh! I'm new so S.O. didn't give credit for my upvote.

Can't dump the symbols of my native library : loadDataForPdb and loadDataFromExe failed

I copied the sample of Google breakpad for Android and added it to my project. I had first a problem to get the minidumps (I was triggering SIGSEGV errors but nothing was written on my SD card). I finally managed to get some minidumps (I don't really know how but that's not my main problem).
My problem is that I can't dump the symbols of my native libraries, it says the following error message :
dump_syms.exe libcppinterface.so > libcppinterface.so.sym
loadDataForPdb and loadDataFromExe failed
Open failed
Thanks for your help

The Breakpad tools are not very cross-platform friendly. You need to build dump_syms on a Linux machine in order to get a dump_syms binary that can read ELF/DWARF and produce debug symbols from your Android binaries. The Windows dump_syms.exe is only used for dumping symbols from MSVC-produced PDB files.

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!

Android 4 ICS (AOSP) build error on Ubuntu 10.04

I am trying to build Android 4.0.1_r1 on Ubuntu 10.04 64bit. I have followed all the steps as mentioned in the official build document before I initiated "make -j2" for a "full engineering" lunch type.
After 2 hours of compilation , I got this error :-
host Java: doclava (out/host/common/obj/JAVA_LIBRARIES/doclava_intermediates/classes)
Exception in thread "main" java.lang.RuntimeException: cts/tools/vm-tests-tf/src/dot/junit/opcodes/xor_long_2addr/Test_xor_long_2addr.java: trouble reading
at com.android.dx.util.FileUtils.readFile(FileUtils.java:87)
at util.build.BuildDalvikSuite.parseTestMethod(BuildDalvikSuite.java:588)
at util.build.BuildDalvikSuite.handleTests(BuildDalvikSuite.java:303)
at util.build.BuildDalvikSuite.compose(BuildDalvikSuite.java:159)
at util.build.BuildDalvikSuite.main(BuildDalvikSuite.java:131)
Caused by: java.io.FileNotFoundException: cts/tools/vm-tests-tf/src/dot/junit/opcodes/xor_long_2addr/Test_xor_long_2addr.java (Too many open files)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(FileInputStream.java:120)
at com.android.dx.util.FileUtils.readFile(FileUtils.java:75)
... 4 more
make: * [out/host/linux-x86/obj/EXECUTABLES/vm-tests-tf_intermediates/tests] Error 1
make: * Waiting for unfinished jobs....
Note: external/doclava/src/com/google/doclava/Stubs.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
After this above error , the build stops.
Modifications I did before the build are as follows :-
From /devices folder I removed Google , Samsung and Ti folder so that they are not included in the build.
In the /build/target/product/core.mk I removed the following apps - Browser, HTMLViewer, Contacts
Although I am a complete beginner in Android source development, I'm having this hunch that the modifications may not be the actual cause of the build failure and root cause lies somewhere else. I need some advice on this.

Odd compiler error, Davlik error 1 from java.net.DatagramPacket.class

I suddenly started getting an unusual compiler error and is it making impossible to do any testing, I am running Eclipse with the plugin and compiling on the 2.1 version.
[2010-08-11 00:29:38 - PeriodTrackerv2]
trouble processing "java/net/DatagramPacket.class":
[2010-08-11 00:29:38 - PeriodTrackerv2]
Attempt to include a core class (java.* or javax.*) in something other
...
[2010-08-11 00:29:38 - PeriodTrackerv2] 1 error; aborting
[2010-08-11 00:29:38 - PeriodTrackerv2] Conversion to Dalvik format failed with error 1
I verified that this class does exist in the standard Android2.1 jar file, so I find it highly unusual a class in the actual base Jar file would be problematic. I am not using this class in any fashion in my program.
I updated to version 2.2 and still get same error, this completely baffles me and just appeared tonight after zero issues for months.
Any ideas on how to fix this?
Cheers,
Tom

Alright!
I reviewed the build path and somehow the Android.jar was added twice. Problem solved.