Question

我有一个包含cmath的C ++程序，并使用它的一些功能（asin，cos等）。请注意，如果我使用math.h

，我会遇到同样的问题

在使用我的程序编译时，我获得了许多编译器错误：

In file included from src/measure.cpp:2:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:301:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/math.h:33:1: error: expected unqualified-id
__BEGIN_DECLS
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/sys/cdefs.h:71:30: note: expanded from macro '__BEGIN_DECLS'
#define __BEGIN_DECLS   extern "C" {
                               ^
In file included from src/measure.cpp:2:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:321:12: error: use of undeclared identifier '__inline_signbitf'; did you mean '__builtin_signbitf'?
    return signbit(__lcpp_x);
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/math.h:184:37: note: expanded from macro 'signbit'
    ( sizeof(x) == sizeof(float)  ? __inline_signbitf((float)(x))        \
                                    ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:321:12: note: '__builtin_signbitf' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/math.h:184:37: note: expanded from macro 'signbit'
    ( sizeof(x) == sizeof(float)  ? __inline_signbitf((float)(x))        \
                                    ^
In file included from src/measure.cpp:2:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:321:12: error: use of undeclared identifier '__inline_signbitd'
    return signbit(__lcpp_x);
           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/math.h:185:37: note: expanded from macro 'signbit'
    : sizeof(x) == sizeof(double) ? __inline_signbitd((double)(x))       \
                                    ^
In file included from src/measure.cpp:2:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:321:12: error: use of undeclared identifier '__inline_signbitl'; did you mean '__builtin_signbitl'?

...

fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make: *** [build/measure.o] Error 1

我正在使用命令编译命令行：

g++ -std=c++11 -g -Wall -I include -c -o build/measure.o src/measure.cpp

感谢您的帮助！

在Mac OS X上使用cmath编译错误

0 个答案: