当我在libsvm / python文件夹下制作时，终端显示：
make -C .. lib
c++ -Wall -Wconversion -O3 -fPIC -fopenmp -c svm.cpp
clang: error: unsupported option '-fopenmp'
make[1]: *** [svm.o] Error 1
make: *** [lib] Error 2
所以我试图找到错误，我认为这是我的gcc编译的问题，因为我之前更改了一些文件。
所以我开始测试它。只需编写一个test.c
#include <stdio.h>
int main()
{
printf("Hello World");
}
我使用了命令：
gcc test.c -o test
和
./test
有很多错误
In file included from tset.c:1:
/usr/include/stdio.h:242:81: error: expected function body after function declarator
FILE *fopen(const char * __restrict __filename, const char * __restrict __mode) __DARWIN_ALIAS_STARTING(...
^
/usr/include/stdio.h:244:63: error: expected function body after function declarator
int fprintf(FILE * __restrict, const char * __restrict, ...) __printflike(2, 3);
^
/usr/include/stdio.h:246:56: error: expected function body after function declarator
int fputs(const char * __restrict, FILE * __restrict) __DARWIN_ALIAS(fputs);
^
/usr/include/stdio.h:249:37: error: expected function body after function declarator
FILE * __restrict) __DARWIN_ALIAS(freopen);
^
/usr/include/stdio.h:250:62: error: expected function body after function declarator
int fscanf(FILE * __restrict, const char * __restrict, ...) __scanflike(2, 3);
^
/usr/include/stdio.h:254:107: error: expected function body after function declarator
...void * __restrict __ptr, size_t __size, size_t __nitems, FILE * __restrict __stream) __DARWIN_ALIAS(fwrite);
^
/usr/include/stdio.h:259:43: error: expected function body after function declarator
int printf(const char * __restrict, ...) __printflike(1, 2);
^
/usr/include/stdio.h:266:42: error: expected function body after function declarator
int scanf(const char * __restrict, ...) __scanflike(1, 2);
^
/usr/include/stdio.h:269:63: error: expected function body after function declarator
int sprintf(char * __restrict, const char * __restrict, ...) __printflike(2, 3) __swift_unavailable("U...
^
/usr/include/stdio.h:270:68: error: expected function body after function declarator
int sscanf(const char * __restrict, const char * __restrict, ...) __scanflike(2, 3);
^
/usr/include/stdio.h:273:21: error: expected parameter declarator
__swift_unavailable("Use mkstemp(3) instead.")
^
/usr/include/stdio.h:273:21: error: expected ')'
/usr/include/stdio.h:273:20: note: to match this '('
__swift_unavailable("Use mkstemp(3) instead.")
^
/usr/include/stdio.h:275:1: error: expected function body after function declarator
__deprecated_msg("This function is provided for compatibility reasons only. Due to security concerns inher...
^
/usr/include/stdio.h:279:68: error: expected function body after function declarator
int vfprintf(FILE * __restrict, const char * __restrict, va_list) __printflike(2, 0);
^
/usr/include/stdio.h:280:48: error: expected function body after function declarator
int vprintf(const char * __restrict, va_list) __printflike(1, 0);
^
/usr/include/stdio.h:281:68: error: expected function body after function declarator
int vsprintf(char * __restrict, const char * __restrict, va_list) __printflike(2, 0) __swift_unavailab...
^
/usr/include/stdio.h:461:65: error: expected function body after function declarator
int asprintf(char ** __restrict, const char * __restrict, ...) __printflike(2, 3);
^
/usr/include/stdio.h:468:70: error: expected function body after function declarator
int vasprintf(char ** __restrict, const char * __restrict, va_list) __printflike(2, 0);
^
tset.c:4:4: warning: implicitly declaring library function 'printf' with type 'int (const char *, ...)'
[-Wimplicit-function-declaration]
printf("OK");
^
tset.c:4:4: note: include the header <stdio.h> or explicitly provide a declaration for 'printf'
1 warning and 18 errors generated.
我删除了test.c中的#include
int main()
{
printf("Hello World");
return 0;
}
并再次运行终端显示：
Hello World
只是想知道......为什么
看来我的MACOS有问题，我发现我在/ usr / local /中更改了一些.cpp或.h文件。所以我只是重置了整个系统hahahah。多么悲伤的故事