Got error: comparison of integers of different signs while running build_webrtc

[Jun711]

Hi, I got the following error message while running build_webrtc. It would great if I get some pointers on how to fix this error.

Running ninja
Cleaning... 0 files.
ninja: Entering directory `out_ios_armeabi_v7a/Release-iphoneos/'
[853/1972] CXX obj/webrtc/base/rtc_base/openssladapter.o
FAILED: obj/webrtc/base/rtc_base/openssladapter.o 
../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF obj/webrtc/base/rtc_base/openssladapter.o.d -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DDISABLE_NACL -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -DCR_CLANG_REVISION=\"303910-1\" -DCR_XCODE_VERSION=0832 -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DNS_BLOCK_ASSERTIONS=1 -DWEBRTC_ENABLE_PROTOBUF=1 -DWEBRTC_INCLUDE_INTERNAL_AUDIO_DEVICE -DEXPAT_RELATIVE_PATH -DHAVE_SCTP -DWEBRTC_ARCH_ARM -DWEBRTC_ARCH_ARM_V7 -DWEBRTC_HAS_NEON -DWEBRTC_POSIX -DWEBRTC_MAC -DWEBRTC_IOS -I../.. -Igen -I../../third_party/boringssl/src/include -Wno-uninitialized -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -fcolor-diagnostics -arch armv7 -Oz -fno-omit-frame-pointer -gdwarf-2 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS10.3.sdk -stdlib=libc++ -miphoneos-version-min=9.0 -fvisibility=hidden -Xclang -load -Xclang ../../third_party/llvm-build/Release+Asserts/lib/libFindBadConstructs.dylib -Xclang -add-plugin -Xclang find-bad-constructs -Xclang -plugin-arg-find-bad-constructs -Xclang check-auto-raw-pointer -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wno-strict-overflow -Wimplicit-fallthrough -Wthread-safety -Winconsistent-missing-override -Wundef -Werror -Wall -Wno-unused-variable -Wundeclared-selector -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-covered-switch-default -Wno-unneeded-internal-declaration -Wno-inconsistent-missing-override -Wno-undefined-var-template -Wno-nonportable-include-path -Wno-address-of-packed-member -Wno-unused-lambda-capture -Wno-user-defined-warnings -std=c++11 -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -Wnon-virtual-dtor -Woverloaded-virtual -c ../../webrtc/base/openssladapter.cc -o obj/webrtc/base/rtc_base/openssladapter.o
../../webrtc/base/openssladapter.cc:824:23: error: comparison of integers of different signs: 'int' and 'size_t' (aka 'unsigned long') [-Werror,-Wsign-compare]
    for (int i = 0; i < sk_GENERAL_NAME_num(names); i++) {
                    ~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[858/1972] CXX obj/webrtc/base/rtc_base/physicalsocketserver.o
ninja: build stopped: subcommand failed.