Building WebRTC with libstdc++

Luca Carlon

unread,

Mar 29, 2016, 7:13:00 PM3/29/16

to discuss-webrtc

Hello,

is it possible to build WebRTC with gcc linking to libstdc++ instead of libc++ for Android? I need to mix WebRTC to libraries that are using libstdc++ and link fails. I noticed that my WebRTC build for linux include this symbol:

0000000000000000 T _ZN6webrtc24CreateSessionDescriptionERKSsS1_PNS_13SdpParseErrorE

while my WebRTC Android build includes this:

00000001 T _ZN6webrtc24CreateSessionDescriptionERKNSt3__112basic_stringIcNS0_11char_traitsIcEENS0_9allocatorIcEEEES8_PNS_13SdpParseErrorE

Why this difference? When I build my application, my object file contains:

U _ZN6webrtc24CreateSessionDescriptionERKSsS1_PNS_13SdpParseErrorE

which means my application will never link properly to WebRTC. Any way to build WebRTC so that it is compatible with my application which is using libstdc++ and which is built using gcc?

Thanks!

Luca

Christoffer Jansson

unread,

Apr 1, 2016, 2:48:52 AM4/1/16

to discuss-webrtc, pb...@google.com

+Peter Boström do you know?

--

---
You received this message because you are subscribed to the Google Groups "discuss-webrtc" group.
To unsubscribe from this group and stop receiving emails from it, send an email to discuss-webrt...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/discuss-webrtc/3e5d2faf-4d21-47b7-8657-b217ce93ba57%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--

/Chris

Andrew MacDonald

unread,

Apr 1, 2016, 3:21:17 AM4/1/16

to discuss-webrtc, pb...@google.com

You could try overriding `android_libcpp_library`:

https://code.google.com/p/chromium/codesearch#chromium/src/build/common.gypi&q=android_libcpp_library&sq=package:chromium&type=cs&l=1760

but honestly, I'm betting it's easier to fix your other dependencies to link against libc++.

To view this discussion on the web visit https://groups.google.com/d/msgid/discuss-webrtc/CAAdOTUPfjRxpNjS5LktvOQyZQJ4-nWEb-HHV6jG3yrC4J509Jw%40mail.gmail.com.

Luca Carlon

unread,

Apr 1, 2016, 9:59:46 PM4/1/16

to discuss-webrtc, pb...@google.com

Thank you for your help. I tried already to change that but it fails the build. However I started from there, I set all the include paths, flags, linked libstdc++, fixed many build errors, added patches etc... at the end what seems to be a proper build comes out. The symbols inside seem to confirm that it is built using libstdc++. Link to my app now succeeds and it starts. However unfortunately I get a segfault as soon as I try to create a peerconnection from the factory:

D [ 870] CrashAnrDetector Build: samsung/kltexx/klte:5.0/LRX21T/G900FXXS1BPC3:user/release-keys

D [ 870] CrashAnrDetector Hardware: MSM8974

D [ 870] CrashAnrDetector Revision: 14

D [ 870] CrashAnrDetector Bootloader: G900FXXS1BPC3

D [ 870] CrashAnrDetector Radio: unknown

D [ 870] CrashAnrDetector Kernel: Linux version 3.4.0-5508620 (dpi@SWDD3016) (gcc version 4.8 (GCC) ) #1 SMP PREEMPT Fri Mar 4 19:03:06 KST 2016

D [ 870] CrashAnrDetector

D [ 870] CrashAnrDetector *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

D [ 870] CrashAnrDetector Build fingerprint: 'samsung/kltexx/klte:5.0/LRX21T/G900FXXS1BPC3:user/release-keys'

D [ 870] CrashAnrDetector Revision: '14'

D [ 870] CrashAnrDetector ABI: 'arm'

D [ 870] CrashAnrDetector pid: 13726, tid: 13760, name: Thread 0x0x9ecd >>> org.qtproject.example.qtwebrtc_customer <<<

D [ 870] CrashAnrDetector signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4

D [ 870] CrashAnrDetector r0 9e9ff654 r1 0000008e r2 0000005c r3 00000000

D [ 870] CrashAnrDetector r4 9e9ff654 r5 00000000 r6 a1646101 r7 a1646100

D [ 870] CrashAnrDetector r8 a0c46358 r9 a1618000 sl ffffffff fp 09899356

D [ 870] CrashAnrDetector ip a0d0aa5c sp 9e9ff650 lr a0934dd8 pc a0b0d4c4 cpsr 80070030

D [ 870] CrashAnrDetector d0 7543686361747441 d1 726854746e657272

D [ 870] CrashAnrDetector d2 65654e6649646165 d3 6f74633a3a646564

D [ 870] CrashAnrDetector d4 0000000000000000 d5 0000000200000004

D [ 870] CrashAnrDetector d6 0000000000000000 d7 ffffffff00000000

D [ 870] CrashAnrDetector d8 407a607ae0000000 d9 407a811aa0000000

D [ 870] CrashAnrDetector d10 4008000000000000 d11 4008000000000000

D [ 870] CrashAnrDetector d12 4008000000000000 d13 0000000000000000

D [ 870] CrashAnrDetector d14 0000000000000000 d15 0000000000000000

D [ 870] CrashAnrDetector d16 7663747262657728 d17 69676e656563696f

D [ 870] CrashAnrDetector d18 30313a63632e656e d19 626577203a293631

D [ 870] CrashAnrDetector d20 657243203a637472 d21 6674616c50657461

D [ 870] CrashAnrDetector d22 69636570536d726f d23 63656a624f636966

D [ 870] CrashAnrDetector d24 0000000000000000 d25 0000000000000000

D [ 870] CrashAnrDetector d26 0001000100010001 d27 0002000200010001

D [ 870] CrashAnrDetector d28 0080008000800080 d29 0080008000800080

D [ 870] CrashAnrDetector d30 0800080008000800 d31 0800080008000800

D [ 870] CrashAnrDetector scr 60000011

D [ 870] CrashAnrDetector

D [ 870] CrashAnrDetector backtrace:

D [ 870] CrashAnrDetector #00 pc 0021e4c4 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #01 pc 0012e879 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #02 pc 0012e413 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #03 pc 0012e569 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #04 pc 000fbfb1 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #05 pc 0015969f /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #06 pc 00159911 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #07 pc 0014ab89 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #08 pc 0009fd4d /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #09 pc 0005ecf5 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #10 pc 00060097 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #11 pc 0005ee03 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #12 pc 0005f275 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector #13 pc 000137b3 /system/lib/libc.so (__pthread_start(void*)+30)

D [ 870] CrashAnrDetector #14 pc 00011893 /system/lib/libc.so (__start_thread+6)

D [ 870] CrashAnrDetector

D [ 870] CrashAnrDetector stack:

D [ 870] CrashAnrDetector 9e9ff610 a16091c8

D [ 870] CrashAnrDetector 9e9ff614 00000000

D [ 870] CrashAnrDetector 9e9ff618 9e9ff62c [stack:13760]

D [ 870] CrashAnrDetector 9e9ff61c a0935b3c /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so (std::string::_Rep::_M_dispose(std::allocator<char> const&)+132)

D [ 870] CrashAnrDetector 9e9ff620 9e9ff63c [stack:13760]

D [ 870] CrashAnrDetector 9e9ff624 9e9ff654 [stack:13760]

D [ 870] CrashAnrDetector 9e9ff628 9e9ff64c [stack:13760]

D [ 870] CrashAnrDetector 9e9ff62c a0934e40 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so (std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()+84)

D [ 870] CrashAnrDetector 9e9ff630 a0d10280 /data/app/org.qtproject.example.qtwebrtc_customer-2/lib/arm/libqtwebrtc_customer.so

D [ 870] CrashAnrDetector 9e9ff634 9e9ff654 [stack:13760]

D [ 870] CrashAnrDetector 9e9ff638 00000000

D [ 870] CrashAnrDetector 9e9ff63c a1646101

D [ 870] CrashAnrDetector 9e9ff640 a1646100

D [ 870] CrashAnrDetector 9e9ff644 9e9ff654 [stack:13760]

D [ 870] CrashAnrDetector 9e9ff648 09899356

D [ 870] CrashAnrDetector 9e9ff6

Too few info probably but if you have any advice please let me know.

Thank you for your help.

Luca

py z

unread,

Jun 19, 2019, 10:44:01 PM6/19/19

to discuss-webrtc

hello，

build with libstdc++ is ok？how to do it？

Thank you。

在 2016年3月30日星期三 UTC+8上午7:13:00，Luca Carlon写道：

abhinay kartik Reddyreddy

unread,

Mar 3, 2020, 4:14:04 AM3/3/20

to discuss-webrtc

Any updates on this? Has anyone succeeded building libwebrtc with libstdc++??

Reply all

Reply to author

Forward