Build webrtc for gcc, ubuntu 20.04

[Peter Arnold]

Hi developers community, I try to build webrtc version 4467.

I installed webrtc, after I did 

 - git checkout  branch-heads/4467

after that I did 

 - gclient sync , 

all have passed done without errors

After I configured my gn as 

 - gn gen out/Default --args="use_custom_libcxx=false use_custom_libcxx_for_host=false"

It's generated file succesfully, after I did 

 - ninja -C out/Default

but when I started building I received an error

 In file included from ../../net/dcsctp/public/strong_alias_test.cc:11:

../../net/dcsctp/public/strong_alias.h:74:19: error: no member named 'hash' in namespace 'std'
      return std::hash<UnderlyingType>()(id.value());
             ~~~~~^
../../net/dcsctp/public/strong_alias.h:74:24: error: 'UnderlyingType' does not refer to a value
      return std::hash<UnderlyingType>()(id.value());
                       ^
../../net/dcsctp/public/strong_alias.h:25:38: note: declared here
template <typename TagType, typename UnderlyingType>
                                     ^
../../net/dcsctp/public/strong_alias.h:74:40: error: expected expression
      return std::hash<UnderlyingType>()(id.value());
                                       ^
3 errors generated.

I don't know how to fix that, pls can somebody explain, how to reconfigure ninja or gn for avoiding that problem

[Peter Arnold]

Also when I use this flags for generating , still trying to avoid problem

gn gen out/Default --args='is_debug=true is_component_build=false rtc_use_h264=true use_rtti=true use_custom_libcxx=false treat_warnings_as_errors=false enable_libaom=true rtc_include_tests=false use_custom_libcxx_for_host=false'

It's falled with errors

../../base/profiler/stack_copier_signal.cc:125:3: error: use of undeclared identifier 'memcpy'; did you mean 'wmemcpy'?
  memcpy(params->context, &ucontext->uc_mcontext, sizeof(mcontext_t));
  ^~~~~~
  wmemcpy
../../build/linux/debian_sid_amd64-sysroot/usr/include/wchar.h:262:17: note: 'wmemcpy' declared here
extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
                ^
../../base/profiler/stack_copier_signal.cc:125:10: error: cannot initialize a parameter of type 'wchar_t *' with an lvalue of type 'mcontext_t *'
  memcpy(params->context, &ucontext->uc_mcontext, sizeof(mcontext_t));
         ^~~~~~~~~~~~~~~
../../build/linux/debian_sid_amd64-sysroot/usr/include/wchar.h:262:46: note: passing argument to parameter '__s1' here
extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
                                             ^
../../base/profiler/stack_copier_signal.cc:212:5: error: use of undeclared identifier 'memset'; did you mean 'wmemset'?
    memset(&action, 0, sizeof(action));
    ^~~~~~
    wmemset
../../build/linux/debian_sid_amd64-sysroot/usr/include/wchar.h:271:17: note: 'wmemset' declared here
extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
                ^
../../base/profiler/stack_copier_signal.cc:212:12: error: cannot initialize a parameter of type 'wchar_t *' with an rvalue of type 'struct sigaction *'
    memset(&action, 0, sizeof(action));
           ^~~~~~~
../../build/linux/debian_sid_amd64-sysroot/usr/include/wchar.h:271:35: note: passing argument to parameter '__s' here
extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
                                  ^
4 errors generated.
[2189/4655] CXX obj/base/base/process_metrics_linux.o
ninja: build stopped: subcommand failed.

Can't understand how to fix that, 

I'm using gcc 

linux-gnu
Thread model: posix
gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.1) 

понедельник, 4 апреля 2022 г. в 18:06:23 UTC+3, Peter Arnold:

[Philipp Hancke]

this was fixed a while back in https://bugs.chromium.org/p/webrtc/issues/detail?id=12584

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