TL;DR: #include <cmath> headers yield no member named 'signbit' in the global space when attempting to compile
Goal: Compile a pure C gRPC client-server application
Errors:
g -std=c 17 client.cpp mathtest.pb.cc mathtest.grpc.pb.cc -o client `pkg-config --libs --cflags protobuf grpc `
In file included from client.cpp:3:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpc /grpc .h:26:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/grpcpp.h:52:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/channel.h:28:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/impl/codegen/completion_queue.h:45:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/impl/codegen/sync.h:32:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/synchronization/mutex.h:72:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/synchronization/internal/kernel_timeout.h:34:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/time/clock.h:26:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/time/time.h:78:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:321:9: error: no member named 'signbit' in the global namespace
using ::signbit;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:322:9: error: no member named 'fpclassify' in the global namespace
using ::fpclassify;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:323:9: error: no member named 'isfinite' in the global namespace
using ::isfinite;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:324:9: error: no member named 'isinf' in the global namespace
using ::isinf;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:325:9: error: no member named 'isnan' in the global namespace
using ::isnan;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:326:9: error: no member named 'isnormal' in the global namespace
using ::isnormal;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:327:7: error: no member named 'isgreater' in the global namespace; did you mean '::std::greater'?
using ::isgreater;
^~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/functional:742:29: note: '::std::greater' declared here
struct _LIBCPP_TEMPLATE_VIS greater : binary_function<_Tp, _Tp, bool>
^
In file included from client.cpp:3:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpc /grpc .h:26:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/grpcpp.h:52:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/channel.h:28:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/impl/codegen/completion_queue.h:45:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/impl/codegen/sync.h:32:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/synchronization/mutex.h:72:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/synchronization/internal/kernel_timeout.h:34:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/time/clock.h:26:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/time/time.h:78:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:328:7: error: no member named 'isgreaterequal' in the global namespace; did you mean '::std::greater_equal'?
using ::isgreaterequal;
^~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/functional:771:29: note: '::std::greater_equal' declared here
struct _LIBCPP_TEMPLATE_VIS greater_equal : binary_function<_Tp, _Tp, bool>
^
In file included from client.cpp:3:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpc /grpc .h:26:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/grpcpp.h:52:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/channel.h:28:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/impl/codegen/completion_queue.h:45:
In file included from /opt/homebrew/Cellar/grpc/1.41.1/include/grpcpp/impl/codegen/sync.h:32:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/synchronization/mutex.h:72:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/synchronization/internal/kernel_timeout.h:34:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/time/clock.h:26:
In file included from /opt/homebrew/Cellar/abseil/20210324.2_1/include/absl/time/time.h:78:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:329:9: error: no member named 'isless' in the global namespace
using ::isless;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:330:9: error: no member named 'islessequal' in the global namespace
using ::islessequal;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:331:9: error: no member named 'islessgreater' in the global namespace
using ::islessgreater;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:332:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
~~^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/cmath:333:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
~~^
This is just a small snippet of what else is cropping up. There are a few more errors with cmath but I assume the majority (if not all) will be cleared up once a solution is implemented.
What I've Tried:
- Using different SDK paths
#Check the current sdk
xcrun --show-sdk-path
#Change sdk
sudo xcode-select -s /Library/Developer/CommandLineTools #Using CommandLineTools SDK
sudo xcode-select -s /Applications/Xcode.app/Contents/Developer #Using XCode.app SDK
- Changing the #include <math.h> link in CMath file as described in this post.
The fix:
If we can alter the search order of #include<...> to search >/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/inclu>de/c /v1 at first, it can be fixed.
Using #include</Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c /v1/math.h> instead of <math.h> in /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c /v1/cmath
- Adding in
-isysroot /sdk/pathflag to my compilation command (full command below)
g -std=c 17 client.cpp mathtest.pb.cc mathtest.grpc.pb.cc -o client -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk 'pkg-config --libs --cflags protobuf grpc '
- Uninstalled, reinstalled, and update Xcode command line tools
- Reinstalled gcc
Configuration:
,xNMM. ---------------------------------
.OMMMMo OS: macOS 12.0.1 21A559 arm64
OMMM0, Host: MacBookPro18,3
.;loddo:' loolloddol;. Kernel: 21.1.0
cKMMMMMMMMMMNWMMMMMMMMMM0: Uptime: 12 days, 22 hours, 41 mins
.KMMMMMMMMMMMMMMMMMMMMMMMWd. Packages: 53 (brew)
XMMMMMMMMMMMMMMMMMMMMMMMX. Shell: zsh 5.8
;MMMMMMMMMMMMMMMMMMMMMMMM: Resolution: 1512x982
:MMMMMMMMMMMMMMMMMMMMMMMM: DE: Aqua
.MMMMMMMMMMMMMMMMMMMMMMMMX. WM: Quartz Compositor
kMMMMMMMMMMMMMMMMMMMMMMMMWd. WM Theme: Blue (Dark)
.XMMMMMMMMMMMMMMMMMMMMMMMMMMk Terminal: iTerm2
.XMMMMMMMMMMMMMMMMMMMMMMMMK. Terminal Font: Monaco 12
kMMMMMMMMMMMMMMMMMMMMMMd CPU: Apple M1 Pro
;KMMMMMMMWXXWMMMMMMMk. GPU: Apple M1 Pro
.cooc,. .,coo:. Memory: 3551MiB / 32768MiB
Not entirely sure what else I can find on this. From the few hours of research I have done, it seems to be a MacOS issue rather than a configuration/setup issue. Any assistance would be greatly appreciated.
CodePudding user response：
After some digging I found what was most likely going wrong...
I executed gcc -Wp,-v -E - in my terminal to see what paths were being searched in what order.
Here was the output:
#include <...> search starts here:
/usr/local/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/13.0.0/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks (framework directory)
As you may see, the first thing searched is /usr/local/include which did hold a version of 'math.h'.
After identifying this, I edited the #include line in 'cmath' to point directly to the one in the same directory as explained below:
// this was here before
#include <math.h>
// and I changed it to this
#include </Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c /v1/math.h>
After this, the compilation line g -std=c 17 client.cpp mathtest.pb.cc mathtest.grpc.pb.cc -o client 'pkg-config --libs --cflags protobuf grpc ' now returns the following error:
ld: library not found for -lre2
clang: error: linker command failed with exit code 1 (use -v to see invocation)
So it seems as though I have fixed the math.h issues, and have found more to explore. yay.
Someone please chime in if you believe this is a bad idea. I know it isn't the brightest decision considering it may affect other things down the road, but I couldn't find anything on changing the order of search directories.
FINAL UPDATE:
Got the server to work finally. Just needed to add 're2' and 'libcares' to my compilation command bringing it to this:
g -std=c 17 client.cpp mathtest.pb.cc mathtest.grpc.pb.cc -o client 'pkg-config --libs --cflags protobuf grpc re2 libcares'
What an amazing feeling to have built something from scratch after two months...