grpc build failure

[pathammer]

Host Environment

• OS: linux - Ubuntu 19.10 - 5.3.0-18-generic
• Compiler: gcc (Ubuntu 9.2.1-9ubuntu2) 9.2.1 2019100

To Reproduce
Steps to reproduce the behavior:
./vcpkg install grpc

Failure logs

The following packages will be built and installed:
    grpc[core]:x64-linux
Starting package 1/1: grpc:x64-linux
Building package grpc[core]:x64-linux...
-- Using cached /home/hammer/code/vcpkg/downloads/grpc-grpc-v1.23.1.tar.gz
-- Using source at /home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44
-- Configuring x64-linux-dbg
-- Configuring x64-linux-rel
-- Building x64-linux-dbg
CMake Error at scripts/cmake/vcpkg_execute_build_process.cmake:136 (message):
    Command failed: /home/hammer/code/vcpkg/downloads/tools/cmake-3.14.0-linux/cmake-3.14.0-Linux-x86_64/bin/cmake --build . --config Debug --target install -- -v
    Working Directory: /home/hammer/code/vcpkg/buildtrees/grpc/x64-linux-dbg
    See logs for more information:
      /home/hammer/code/vcpkg/buildtrees/grpc/install-x64-linux-dbg-out.log

Call Stack (most recent call first):
  scripts/cmake/vcpkg_build_cmake.cmake:96 (vcpkg_execute_build_process)
  scripts/cmake/vcpkg_install_cmake.cmake:24 (vcpkg_build_cmake)
  ports/grpc/portfile.cmake:76 (vcpkg_install_cmake)
  scripts/ports.cmake:94 (include)


Error: Building package grpc:x64-linux failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with `.\vcpkg update`, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
  Package: grpc:x64-linux
  Vcpkg version: 2019.09.12-unknownhash

FAILED: CMakeFiles/gpr.dir/src/core/lib/gpr/log_linux.cc.o 
/usr/bin/c++  -DPB_FIELD_32BIT -I/home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44/include -I/home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44 -I/home/hammer/code/vcpkg/installed/x64-linux/include -I/home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44/third_party/address_sorting/include -I/home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44/third_party/nanopb -fPIC -std=c++11 -g -fPIC   -fno-exceptions -fno-rtti -MD -MT CMakeFiles/gpr.dir/src/core/lib/gpr/log_linux.cc.o -MF CMakeFiles/gpr.dir/src/core/lib/gpr/log_linux.cc.o.d -o CMakeFiles/gpr.dir/src/core/lib/gpr/log_linux.cc.o -c /home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44/src/core/lib/gpr/log_linux.cc
/home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44/src/core/lib/gpr/log_linux.cc:43:13: error: ambiguating new declaration of ‘long int gettid()’
   43 | static long gettid(void) { return syscall(__NR_gettid); }
      |             ^~~~~~
In file included from /usr/include/unistd.h:1170,
                 from /home/hammer/code/vcpkg/buildtrees/grpc/src/v1.23.1-e3bc36af44/src/core/lib/gpr/log_linux.cc:41:
/usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note: old declaration ‘__pid_t gettid()’
   34 | extern __pid_t gettid (void) __THROW;
      |                ^~~~~~

Additional context
was able to build other packages like protobuf

[JackBoosY]

Hi @pathammer, thanks for reporting this issue.
It seems the function gettid dumplicate with system function.
Can you unzip this patch , move it to VCPKG_PATH/ports/grpc/ and add line:
fix-duplicate-gettid.patch
to VCPKG_PATH/ports/grpc/portfile.cmake line 27
then try to rebuild grpc?

Thanks.

[pathammer]

The patch corrected the issue @JackBoosY
Thanks!

[JackBoosY]

Hi @pathammer, my PR has been merged. Please update vcpkg and rebuild grpc.

Thanks.