can't compile grpc gem on MacOS BigSur

### What version of gRPC and what language are you using?

gprc 1.30.2 with ruby 2.7.2

### What operating system (Linux, Windows,...) and version?

Mac OS BigSur 11.0.1 (20B50)

### What runtime / compiler are you using (e.g. python version or version of gcc)

* ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-darwin19]
* Bundler version 2.1.4
* gcc:
```
Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 12.0.0 (clang-1200.0.32.27)
Target: x86_64-apple-darwin20.1.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
```


### What did you do?

bundle install with grpc locked to 1.30.2

### What did you expect to see?

it should compile/install without issues

### What did you see instead?

Here is the full log from the compilation:

```
When trying to install current GitLab using grpc-1.30.2, I get this compilation output:
current directory: /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc
/Users/brodock/.rvm/rubies/ruby-2.7.2/bin/ruby -I /Users/brodock/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0 -r ./siteconf20201202-93469-1d8riw9.rb extconf.rb --with-cflags\=-Wno-error\=implicit-function-declaration
Building internal gRPC into /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/libs/opt
[C]       Compiling third_party/zlib/adler32.c
[C]       Compiling third_party/zlib/compress.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/adler32.o`
[C]       Compiling third_party/zlib/crc32.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/crc32.o`
[C]       Compiling third_party/zlib/deflate.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/deflate.o`
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/compress.o`
[C]       Compiling third_party/zlib/gzclose.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzclose.o`
[C]       Compiling third_party/zlib/gzlib.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzlib.o`
[C]       Compiling third_party/zlib/gzread.c
[C]       Compiling third_party/zlib/gzwrite.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzwrite.o`
[C]       Compiling third_party/zlib/infback.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzread.o`
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/infback.o`
[C]       Compiling third_party/zlib/inffast.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inffast.o`
[C]       Compiling third_party/zlib/inflate.c
[C]       Compiling third_party/zlib/inftrees.c
[C]       Compiling third_party/zlib/trees.c
[C]       Compiling third_party/zlib/uncompr.c
[C]       Compiling third_party/zlib/zutil.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/zutil.o`
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inffast.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inffast.o third_party/zlib/inffast.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/uncompr.o`
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/trees.o`
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inftrees.o`
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/infback.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/infback.o third_party/zlib/infback.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzread.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzread.o third_party/zlib/gzread.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzwrite.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzwrite.o third_party/zlib/gzwrite.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inflate.o`
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzlib.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzlib.o third_party/zlib/gzlib.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzclose.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzclose.o third_party/zlib/gzclose.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/compress.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/compress.o third_party/zlib/compress.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/deflate.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/deflate.o third_party/zlib/deflate.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/crc32.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/crc32.o third_party/zlib/crc32.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/adler32.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/adler32.o third_party/zlib/adler32.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inflate.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inflate.o third_party/zlib/inflate.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inftrees.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/inftrees.o third_party/zlib/inftrees.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/trees.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/trees.o third_party/zlib/trees.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/uncompr.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/uncompr.o third_party/zlib/uncompr.c
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -std=c99  -g   -fvisibility=hidden -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/zutil.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/zutil.o third_party/zlib/zutil.c
[C]       Compiling third_party/cares/cares/ares__close_sockets.c
third_party/zlib/gzwrite.c:89:20: warning: implicit declaration of function 'write' is invalid in C99 [-Wimplicit-function-declaration]
            writ = write(state->fd, strm->next_in, put);
                   ^
third_party/zlib/gzread.c:35:15: warning: implicit declaration of function 'read' is invalid in C99 [-Wimplicit-function-declaration]
        ret = read(state->fd, buf + *have, get);
              ^
third_party/zlib/gzwrite.c:110:24: warning: implicit declaration of function 'write' is invalid in C99 [-Wimplicit-function-declaration]
                writ = write(state->fd, state->x.next, put);
                       ^
third_party/zlib/gzlib.c:252:9: warning: implicit declaration of function 'lseek' is invalid in C99 [-Wimplicit-function-declaration]
        LSEEK(state->fd, 0, SEEK_END);  /* so gzoffset() is correct */
        ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:258:24: warning: implicit declaration of function 'lseek' is invalid in C99 [-Wimplicit-function-declaration]
        state->start = LSEEK(state->fd, 0, SEEK_CUR);
                       ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:359:9: warning: implicit declaration of function 'lseek' is invalid in C99 [-Wimplicit-function-declaration]
    if (LSEEK(state->fd, state->start, SEEK_SET) == -1)
        ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:400:15: warning: implicit declaration of function 'lseek' is invalid in C99 [-Wimplicit-function-declaration]
        ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
              ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:496:14: warning: implicit declaration of function 'lseek' is invalid in C99 [-Wimplicit-function-declaration]
    offset = LSEEK(state->fd, 0, SEEK_CUR);
             ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzwrite.c:661:9: warning: implicit declaration of function 'close' is invalid in C99 [-Wimplicit-function-declaration]
    if (close(state->fd) == -1)
        ^
third_party/zlib/gzread.c:651:11: warning: implicit declaration of function 'close' is invalid in C99 [-Wimplicit-function-declaration]
    ret = close(state->fd);
          ^
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__close_sockets.o`
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -Ithird_party/cares -Ithird_party/cares/cares -fvisibility=hidden -D_GNU_SOURCE -Ithird_party/cares/config_darwin    -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DHAVE_CONFIG_H -std=c99  -g   -g -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__close_sockets.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__close_sockets.o third_party/cares/cares/ares__close_sockets.c
[C]       Compiling third_party/cares/cares/ares__get_hostent.c
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__get_hostent.o`
5 warnings generated.
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -Ithird_party/cares -Ithird_party/cares/cares -fvisibility=hidden -D_GNU_SOURCE -Ithird_party/cares/config_darwin    -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DHAVE_CONFIG_H -std=c99  -g   -g -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__get_hostent.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__get_hostent.o third_party/cares/cares/ares__get_hostent.c
3 warnings generated.
2 warnings generated.
third_party/zlib/gzlib.c:252:9: error: implicit declaration of function 'lseek' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        LSEEK(state->fd, 0, SEEK_END);  /* so gzoffset() is correct */
        ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:252:9: note: did you mean 'fseek'?
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdio.h:162:6: note: 'fseek' declared here
int      fseek(FILE *, long, int);
         ^
third_party/zlib/gzlib.c:258:24: error: implicit declaration of function 'lseek' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        state->start = LSEEK(state->fd, 0, SEEK_CUR);
                       ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:359:9: error: implicit declaration of function 'lseek' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    if (LSEEK(state->fd, state->start, SEEK_SET) == -1)
        ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:400:15: error: implicit declaration of function 'lseek' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
              ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
third_party/zlib/gzlib.c:496:14: error: implicit declaration of function 'lseek' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    offset = LSEEK(state->fd, 0, SEEK_CUR);
             ^
third_party/zlib/gzlib.c:14:17: note: expanded from macro 'LSEEK'
#  define LSEEK lseek
                ^
[C]       Compiling third_party/cares/cares/ares__read_line.c
5 errors generated.
third_party/zlib/gzwrite.c:89:20: error: implicit declaration of function 'write' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
            writ = write(state->fd, strm->next_in, put);
                   ^
third_party/zlib/gzwrite.c:89:20: note: did you mean 'fwrite'?
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdio.h:165:9: note: 'fwrite' declared here
size_t   fwrite(const void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream) __DARWIN_ALIAS(fwrite);
         ^
third_party/zlib/gzwrite.c:110:24: error: implicit declaration of function 'write' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
                writ = write(state->fd, state->x.next, put);
                       ^
third_party/zlib/gzwrite.c:661:9: error: implicit declaration of function 'close' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    if (close(state->fd) == -1)
        ^
mkdir -p `dirname /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__read_line.o`
make: *** [/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzlib.o] Error 1
make: *** Waiting for unfinished jobs....
3 errors generated.
third_party/zlib/gzread.c:35:15: error: implicit declaration of function 'read' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
        ret = read(state->fd, buf + *have, get);
              ^
third_party/zlib/gzread.c:35:15: note: did you mean 'fread'?
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdio.h:158:9: note: 'fread' declared here
size_t   fread(void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream);
         ^
make: *** [/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzwrite.o] Error 1
gcc -Ithird_party/googletest/googletest/include -Ithird_party/googletest/googlemock/include -Ithird_party/boringssl-with-bazel/src/include -Ithird_party/cares -Ithird_party/cares/cares -Ithird_party/address_sorting/include -DGPR_BACKWARDS_COMPATIBILITY_MODE -g -Wall -Wextra -DOSATOMIC_USE_INLINED=1 -Ithird_party/abseil-cpp -Ithird_party/upb -Isrc/core/ext/upb-generated -O2 -Wframe-larger-than=16384 -fPIC -I. -Iinclude -I/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/gens -I/usr/local/include -DNDEBUG -DINSTALL_PREFIX=\"/usr/local\" -arch i386 -arch x86_64  -Ithird_party/zlib -Ithird_party/cares -Ithird_party/cares/cares -fvisibility=hidden -D_GNU_SOURCE -Ithird_party/cares/config_darwin    -DWIN32_LEAN_AND_MEAN -D_HAS_EXCEPTIONS=0 -DNOMINMAX -DHAVE_CONFIG_H -std=c99  -g   -g -MMD -MF /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__read_line.dep -c -o /Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/cares/cares/ares__read_line.o third_party/cares/cares/ares__read_line.c
third_party/zlib/gzread.c:651:11: error: implicit declaration of function 'close' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    ret = close(state->fd);
          ^
2 errors generated.
make: *** [/Users/brodock/.rvm/gems/ruby-2.7.2/gems/grpc-1.30.2/src/ruby/ext/grpc/objs/opt/third_party/zlib/gzread.o] Error 1
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/Users/brodock/.rvm/rubies/ruby-2.7.2/bin/$(RUBY_BASE_NAME)

extconf failed, exit code 1
```

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

See [TROUBLESHOOTING.md](https://github.com/grpc/grpc/blob/master/TROUBLESHOOTING.md) for how to diagnose problems better.

### Anything else we should know about your project / environment?

I've also tried with latest `1.32.0` and got similar failure

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can't compile grpc gem on MacOS BigSur #24881

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can't compile grpc gem on MacOS BigSur #24881

Description

What version of gRPC and what language are you using?

What operating system (Linux, Windows,...) and version?

What runtime / compiler are you using (e.g. python version or version of gcc)

What did you do?

What did you expect to see?

What did you see instead?

Anything else we should know about your project / environment?

Metadata

Metadata

Assignees

Labels

Type

Projects

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Relationships

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