Apple Clang 11.0.3 on MacOS Catalina 10.15.4 not compiling

[ArthoPacini]

Just run brew install nlohmann-json and installed the latest stable version 3.7.3

with brew test nlohmann-json i got 19 errors

i got the latest apple clang, no xcode installed

here is the log:

2020-05-04 17:46:03 -0300

/usr/bin/clang++
test.cc
-I/usr/local/Cellar/nlohmann-json/3.7.3/include
-std=c++11
-o
test

In file included from test.cc:2:
In file included from /usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:46:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/numeric:148:
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:317:9: error: no member named 'signbit' in the global namespace
using ::signbit;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:318:9: error: no member named 'fpclassify' in the global namespace
using ::fpclassify;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:319:9: error: no member named 'isfinite' in the global namespace; did you mean 'finite'?
using ::isfinite;
      ~~^
/usr/local/include/math.h:749:12: note: 'finite' declared here
extern int finite(double)
           ^
In file included from test.cc:2:
In file included from /usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:46:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/numeric:148:
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:320:9: error: no member named 'isinf' in the global namespace
using ::isinf;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:321:9: error: no member named 'isnan' in the global namespace
using ::isnan;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:322:9: error: no member named 'isnormal' in the global namespace
using ::isnormal;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:323:7: error: no member named 'isgreater' in the global namespace; did you mean '::std::greater'?
using ::isgreater;
      ^~
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/functional:731:29: note: '::std::greater' declared here
struct _LIBCPP_TEMPLATE_VIS greater : binary_function<_Tp, _Tp, bool>
                            ^
In file included from test.cc:2:
In file included from /usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:46:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/numeric:148:
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:324:7: error: no member named 'isgreaterequal' in the global namespace; did you mean '::std::greater_equal'?
using ::isgreaterequal;
      ^~
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/functional:760:29: note: '::std::greater_equal' declared here
struct _LIBCPP_TEMPLATE_VIS greater_equal : binary_function<_Tp, _Tp, bool>
                            ^
In file included from test.cc:2:
In file included from /usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:46:
In file included from /Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/numeric:148:
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:325:9: error: no member named 'isless' in the global namespace
using ::isless;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:326:9: error: no member named 'islessequal' in the global namespace
using ::islessequal;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:327:9: error: no member named 'islessgreater' in the global namespace
using ::islessgreater;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:328:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
      ~~^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cmath:329:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
      ~~^
In file included from test.cc:2:
/usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:8912:59: error: expected unqualified-id
                        if (JSON_HEDLEY_UNLIKELY(not std::isfinite(res)))
                                                          ^
/usr/local/include/math.h:155:5: note: expanded from macro 'isfinite'
    ( sizeof(x) == sizeof(float)  ? __inline_isfinitef((float)(x))       \
    ^
In file included from test.cc:2:
/usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:12833:17: error: expected unqualified-id
    assert(std::isfinite(value));
                ^
/usr/local/include/math.h:155:5: note: expanded from macro 'isfinite'
    ( sizeof(x) == sizeof(float)  ? __inline_isfinitef((float)(x))       \
    ^
In file included from test.cc:2:
/usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:13537:17: error: expected unqualified-id
    assert(std::isfinite(value));
                ^
/usr/local/include/math.h:155:5: note: expanded from macro 'isfinite'
    ( sizeof(x) == sizeof(float)  ? __inline_isfinitef((float)(x))       \
    ^
In file included from test.cc:2:
/usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:13712:17: error: expected unqualified-id
    assert(std::isfinite(value));
                ^
/usr/local/include/math.h:155:5: note: expanded from macro 'isfinite'
    ( sizeof(x) == sizeof(float)  ? __inline_isfinitef((float)(x))       \
    ^
In file included from test.cc:2:
/usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:13715:14: error: expected unqualified-id
    if (std::signbit(value))
             ^
/usr/local/include/math.h:170:5: note: expanded from macro 'signbit'
    ( sizeof(x) == sizeof(float)  ? __inline_signbitf((float)(x))        \
    ^
In file included from test.cc:2:
/usr/local/Cellar/nlohmann-json/3.7.3/include/nlohmann/json.hpp:14431:22: error: expected unqualified-id
        if (not std::isfinite(x))
                     ^
/usr/local/include/math.h:155:5: note: expanded from macro 'isfinite'
    ( sizeof(x) == sizeof(float)  ? __inline_isfinitef((float)(x))       \
    ^
19 errors generated.

HOMEBREW_VERSION: 2.2.15-2-gb06a7af
ORIGIN: https://github.com/Homebrew/brew
HEAD: b06a7af604130c0b133a336e9cb50e4b135778da
Last commit: 49 minutes ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 8c2cb0a6d90feaaa7ce298ddfb16b934927eab9f
Core tap last commit: 40 minutes ago
HOMEBREW_PREFIX: /usr/local
HOMEBREW_MAKE_JOBS: 12
CPU: dodeca-core 64-bit penryn
Homebrew Ruby: 2.6.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
Clang: 11.0 build 1103
Git: 2.24.2 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 7.64.1 => /usr/bin/curl
Java: 14.0.1
macOS: 10.15.4-x86_64
CLT: 11.4.1.0.1.1586360307
Xcode: N/A

CC: /usr/bin/clang
CXX: /usr/bin/clang++
OBJC: /usr/bin/clang
OBJCXX: /usr/bin/clang++
CFLAGS: -Os -w -pipe -march=nehalem -mmacosx-version-min=10.15 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk
CXXFLAGS: -Os -w -pipe -march=nehalem -mmacosx-version-min=10.15 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk
CPPFLAGS: -F/usr/local/Frameworks -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk
LDFLAGS: -L/usr/local/lib -F/usr/local/Frameworks -Wl,-headerpad_max_install_names -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk
SDKROOT: /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk
MAKEFLAGS: -j12
CMAKE_PREFIX_PATH: /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr
CMAKE_FRAMEWORK_PATH: /usr/local/Frameworks:/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks
PKG_CONFIG_LIBDIR: /usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/local/Homebrew/Library/Homebrew/os/mac/pkgconfig/10.15:/usr/lib/pkgconfig
HOMEBREW_GIT: git
PATH: /usr/local/bin:/usr/local/Homebrew/Library/Homebrew/shims/scm:/usr/bin:/bin:/usr/sbin:/sbin
CPATH: /usr/local/include:/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include

[ArthoPacini]

it does not compile a sample code like

#include <nlohmann/json.hpp>
int main()
{
    nlohmann::json test;
}

same errors

[nlohmann]

This seems unrelated to this library. Your compiler fails to find standard library functions. This seems to describe a similar issue: https://stackoverflow.com/questions/58628377/catalina-c-using-cmath-headers-yield-error-no-member-named-signbit-in-th

[ArthoPacini]

This seems unrelated to this library. Your compiler fails to find standard library functions. This seems to describe a similar issue: https://stackoverflow.com/questions/58628377/catalina-c-using-cmath-headers-yield-error-no-member-named-signbit-in-th

yeah, i think you are right, when i get home i will install XCode and see if the problem is solved

Thank you!!

[ArthoPacini]

Just got it working

when compiling, use

clang++ main.cpp -o main -std=c++17 -isysroot X

where X is the output of xcrun --show-sdk-path in the terminal,
mine is /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk

so i just run
clang++ main.cpp -o main -std=c++17 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk

the only problem is that the compiler no longer search in /usr/local/include and cannot find any other libraries..

[ArthoPacini]

sudo mount -uw /
killall Finder
sudo ln -s xcrun --show-sdk-path/usr/include /usr/include

[nlohmann]

Strange - never had such problems, and I am using Catalina myself. Maybe it's because I usually use CMake and that takes care about all required flags.

[ArthoPacini]

i am using Catalina 10.15.4, fresh install, that's really strange indeed,

[nlohmann]

FYI, this is what CMake is checking:

-- Checking whether CXX compiler has -isysroot
-- Checking whether CXX compiler has -isysroot - yes
-- Checking whether CXX compiler supports OSX deployment target flag
-- Checking whether CXX compiler supports OSX deployment target flag - yes