I want to build webrtc for my small machine with arm926ej-s processor.
After I install depot_tools, I did following steps:
gclient config http://webrtc.googlecode.com/svn/trunk gclient sync --force cd trunk ninja -C out/Debug
All working fine and I can run some binary files, which I get after compiling.
Now, I want to compile for my arm machine. I do following:
rm -rf out export GYP_CROSSCOMPILE=1 export GYP_DEFINES="target_arch=arm arm_float_abi=hard" export CC=/path/to/my/gcc export CXX=/path/to/my/g++ export AR=/path/to/my/ar export CC_host=gcc export CXX_host=g++ gclient runhooks --force
Still all smoothly...
But when I try to compile it with command:
ninja -C out/Debug
I got many errors, like:
CC obj/chromium/src/third_par...p/srtp/crypto/cipher/libsrtp.aes_cbc.o FAILED: /opt/virt2real-sdk/codesourcery/arm-2013.05/bin/arm-none-linux-gnueabi-gcc -MMD -MF obj/chromium/src/third_party/libsrtp/srtp/crypto/cipher/libsrtp.aes_cbc.o.d -DHAVE_STDLIB_H -DHAVE_STRING_H -DV8_DEPRECATION_WARNINGS -D_FILE_OFFSET_BITS=64 -DHAVE_INT16_T -DHAVE_INT32_T -DHAVE_INT8_T -DHAVE_UINT16_T -DHAVE_UINT32_T -DHAVE_UINT64_T -DHAVE_UINT8_T -DHAVE_STDINT_H -DHAVE_INTTYPES_H -DHAVE_NETINET_IN_H -DINLINE=inline -DCPU_CISC -DCHROMIUM_BUILD -DCR_CLANG_REVISION=214024 -DTOOLKIT_VIEWS=1 -DUI_COMPOSITOR_IMAGE_TRANSPORT -DUSE_AURA=1 -DUSE_ASH=1 -DUSE_PANGO=1 -DUSE_CAIRO=1 -DUSE_GLIB=1 -DUSE_DEFAULT_RENDER_THEME=1 -DUSE_LIBJPEG_TURBO=1 -DUSE_X11=1 -DUSE_CLIPBOARD_AURAX11=1 -DENABLE_ONE_CLICK_SIGNIN -DENABLE_PRE_SYNC_BACKUP -DUSE_XI2_MT=2 -DENABLE_REMOTING=1 -DENABLE_WEBRTC=1 -DENABLE_PEPPER_CDMS -DENABLE_CONFIGURATION_POLICY -DENABLE_NOTIFICATIONS -DUSE_UDEV -DENABLE_EGLIMAGE=1 -DENABLE_TASK_MANAGER=1 -DENABLE_EXTENSIONS=1 -DENABLE_PLUGINS=1 -DENABLE_SESSION_SERVICE=1 -DENABLE_THEMES=1 -DENABLE_AUTOFILL_DIALOG=1 -DENABLE_BACKGROUND=1 -DENABLE_GOOGLE_NOW=1 -DCLD_VERSION=2 -DCLD2_DATA_SOURCE=static -DENABLE_FULL_PRINTING=1 -DENABLE_PRINTING=1 -DENABLE_SPELLCHECK=1 -DENABLE_CAPTIVE_PORTAL_DETECTION=1 -DENABLE_APP_LIST=1 -DENABLE_SETTINGS_APP=1 -DENABLE_MANAGED_USERS=1 -DENABLE_MDNS=1 -DENABLE_SERVICE_DISCOVERY=1 -DUSE_NSS=1 -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DWTF_USE_DYNAMIC_ANNOTATIONS=1 -D_DEBUG -D_GLIBCXX_DEBUG=1 -I../../chromium/src/third_party/libsrtp/config -I../../chromium/src/third_party/libsrtp/srtp/include -I../../chromium/src/third_party/libsrtp/srtp/crypto/include -Igen -fstack-protector --param=ssp-buffer-size=4 -Werror -pthread -fno-exceptions -fno-strict-aliasing -Wno-unused-parameter -Wno-missing-field-initializers -fvisibility=hidden -pipe -fPIC -Wno-reserved-user-defined-literal -Xclang -load -Xclang /home/footniko/my/webrtcnative/trunk/tools/clang/scripts/../../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.so -Xclang -add-plugin -Xclang find-bad-constructs -fcolor-diagnostics -Wheader-hygiene -Wno-char-subscripts -Wno-unneeded-internal-declaration -Wno-covered-switch-default -Wstring-conversion -Wno-c++11-narrowing -Wno-deprecated-register -Wno-format -Wno-unused-result -target arm-linux-gnueabihf -march=armv7-a -no-integrated-as -mtune=generic-armv7-a -mfpu=neon -mfloat-abi=hard -mthumb --sysroot=/home/footniko/my/webrtcnative/trunk/arm-sysroot -O0 -g -funwind-tables -Wno-undefined-bool-conversion -Wno-tautological-undefined-compare -c ../../chromium/src/third_party/libsrtp/srtp/crypto/cipher/aes_cbc.c -o obj/chromium/src/third_party/libsrtp/srtp/crypto/cipher/libsrtp.aes_cbc.o arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-Xclang' arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-Xclang' arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-Xclang' arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-add-plugin' arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-Xclang' arm-none-linux-gnueabi-gcc: error: find-bad-constructs: No such file or directory arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-fcolor-diagnostics' arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-Wheader-hygiene' arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-Wstring-conversion' arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-target' arm-none-linux-gnueabi-gcc: error: arm-linux-gnueabihf: No such file or directory arm-none-linux-gnueabi-gcc: error: unrecognized command line option '-no-integrated-as'
i also got this problem but it was because of the exports related to compiler choices (CC, CXX, etc.). Indeed this makes you faulty since -Xclang is not recognized by gcc.
Here is a method i used to try to compile. However, it seems that webrtc trunk is moving fast and it is no more working these last days. The biggest change that is related to your problem and the suggestion of 9dan : you need to say that you want to target android (and linux) and for this you need android_tools. But now, it is not fetched from webrtc, you should get the one from chromium.
Here is a summary of the install process.
System requirements:
Prefer a virtualized Lubuntu14.04 64bit on at least 30Gb virtual drive space and 8GbRAM :
_Lubuntu is fast to use when virtualized and it is based on ubuntu which is necessary since installation scripts rely on ubuntu software packages names _64bit is necessary since scripts like install-build-deps.sh expect 64bit system and install specific 32bit libraries _30Gb at least because standard (non cross compiling) webrtc requires at least 10Gb but when adding all cross compiling stuff, drive space explodes ! _8GbRAM to be able to compile and link everything
Then, from this host, here is the install process:
basic preliminary setup... supposing that no variables discussed later have already been exported
First install the essential packages to be able to fetch data and play with java :
// ensure all required depot are ready sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe restricted multiverse" // install most essential packages prior to fetching sudo apt-get install openjdk-7-jdk git subversion
initial Webrtc fetch
Create a directory to fetch and go
mkdir WebRTC cd WebRTC git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git export PATH=<location of depot_tools>:"$PATH" // example : export PATH=/home/testing/WebRTC/depot_tools:"$PATH" export JAVA_HOME=<location of Java SE 6 - JDK> // example : export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64/ gclient config http://webrtc.googlecode.com/svn/trunk gclient sync --force
Note 0: sometime it fails saying gcc, pkg-config, etc have not been found. This often occurs on a fresh install where plenty of packages are missing. Fortunately a script should have already been downloaded :
trunk/built/install-build-deps.sh
Run it to install all required packages and rerun
gclient sync --force
add all necessary android sdk&ndk that are required to target arm systems
echo "target_os = ['android', 'unix']" >> .gclient gclient sync cd trunk source ./build/android/envsetup.sh export GYP_DEFINES="$GYP_DEFINES OS=android" gclient runhooks
Note 1: the android tools are no more directly available with webrtc. It is recommended to use the one from chromium. then, in Webrtc folder or another one (example, the original location : trunk/third_party/).
cd myTargetDirectory // example cd trunk/third_party/ git clone https://chromium.googlesource.com/android_tools
Once android_tools are fetched, configure project to see it. Edit :
trunk/chromium/src/third_party/openmax_dl/dl/dl.gyp
and add the required variable android_ndk_root by adding the following line in the 'variables' section at the beginning of the file:
'android_ndk_root':'<WebRTCfolder>/trunk/third_party/android_tools/ndk/', example 'android_ndk_root':'/home/testing/WebRTC/trunk/third_party/android_tools/ndk/',
you can also export ANDROID_NDK_ROOT in your .bashrc
export ANDROID_NDK_ROOT=<WebRTCfolder>/trunk/third_party/android_tools/ndk/ example export ANDROID_NDK_ROOT=/home/testing/WebRTC/trunk/third_party/android_tools/ndk/
prepare cross compile for armv7a based platform
// install all necessary packages cd trunk ./build/install-build-deps.sh --arm ./build/install-build-deps-android.sh
/* => after different experiment, i used the above command, but i guess it is not absolutely necessary from a very clean install. Anycase, if done, command "./build/install-build-deps.sh --arm" should be used after in order to exchange some cross compiler packages (mainly in order to keep g++-arm-linux-gnueabihf and gcc-arm-linux-gnueabihf installed) */
./build/linux/install-arm-sysroot.py export GYP_CROSSCOMPILE=1 /* => i used it but i ask myself if it is still necessary since an automatic declaration is performed later on.*/ export GYP_DEFINES="OS=linux target_arch=arm arm_version=7 arm_use_neon=1" // other options like arm_fpu=vfpv3-d16 arm_float_abi=softfp are set by default, actually, even arm_vervion=7 and use_neon=1 */
Here, the target is linux arm so this should be enough but if targetting android, it may be necessary to define the following variables
export ANDROID_SDK_VERSION=19 export GYP_DEFINES="$GYP_DEFINES android_sdk_version=19"
NOTE 2 : the following exports are often reported on guides and tutorials. However, when used, they bring several problems (unrecognized -Xclang flag, etc.). It seems that they are no more usefull since gyp files automatically adjust those setup ! For me, avoiding them was the only way to get configuration and beginning of compilation work.
export CC=arm-linux-gnueabihf-gcc export CXX=arm-linux-gnueabihf-g++ export AR=arm-linux-gnueabihf-ar export CC_host=gcc export CXX_host=g++
Finally, configure the system before moving to the final compile step
cd .. gclient runhooks --force cd trunk/
Potential error 1 , Solved
The following error appears first : => gyp: Undefined variable android_ndk_root in chromium/src/third_party/openmax_dl/dl/dl.gyp => come back to previous section, you certainly forgot to define android_ndk_root variable in the enlighted file: 'android_ndk_root':'/trunk/third_party/android_tools/ndk/', */
Potential error 2, solved
a relative link problem appears when trying to target trunk/build/linux/pkg-config-wrapper, you can get something similar to this : Updating projects from gyp files... /bin/sh: ../../../build/linux/pkg-config-wrapper: No such file or directory gyp: Call to '../../../build/linux/pkg-config-wrapper "/media/workspace/lib/webrtc/trunk/arm-sysroot" "arm" --libs-only-L --libs-only-other nss' returned exit status 127. while loading dependencies of trunk/all.gyp while trying to load trunk/all.gyp Error: Command /usr/bin/python trunk/build/gyp_chromium --depth=trunk trunk/all.gyp -Dextra_gyp_flag=0 returned non-zero exit status 1 in /media/workspace/lib/webrtc => if you want to solve this problem for all files having this error, look for wrong files with :
grep -Ir --exclude=\*.{c,h} "../../../build/linux/pkg-config-wrapper" *
and replace related relative path portion in pkg config line (at the beginning of each of the found files : 'pkg-config': 'trunk/build/linux/pkg-config-wrapper "<(sysroot)" "<(target_arch)"',
gclient runhooks --force
final compile step
cd trunk ninja -C out/Release/ ninja -C out/Debug/ // if required
an idea : sudo apt-get install gcc-arm-linux-androideabi you should target third_party/android_tools/ndk/platforms/android-XXX/arch-arm/usr/include/sys/
// if having problems with clang, it can be desactivated with this additionnal option (rerun gclien runhooks after)
export GYP_DEFINES="$GYP_DEFINES clang=0"
