Question

LibSVM我有一个非常简单的'问题'：

我在Mac，OSX，10.9.5。我从here克隆了libSVM repo，根据README上的说明，只需运行make。

这是假设编译libSVM程序没有问题，但我收到一连串关于签名的警告。

毋庸置疑，这让我感到担忧，因为不知不觉中的迹象正在发生变化，我对分类器没有信心。这应该是一个值得关注的问题，如果是这样，我该如何解决它？

这是我从命令行运行make命令时得到的结果：

adam-MacBook-Pro:libsvm adam$ make
c++ -Wall -Wconversion -O3 -fPIC -c svm.cpp
svm.cpp:96:26: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
        head = (head_t *)calloc(l,sizeof(head_t));      // initialized to 0
                         ~~~~~~ ^
svm.cpp:98:10: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
        size -= l * sizeof(head_t) / sizeof(Qfloat);
                ^ ~
svm.cpp:146:54: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
                h->data = (Qfloat *)realloc(h->data,sizeof(Qfloat)*len);
                                                                  ~^~~
svm.cpp:1651:38: warning: implicit conversion changes signedness: 'const int' to 'unsigned long' [-Wsign-conversion]
        double *alpha = Malloc(double,prob->l);
                        ~~~~~~~~~~~~~~~~~~~~^~
svm.cpp:39:40: note: expanded from macro 'Malloc'
#define Malloc(type,n) (type *)malloc((n)*sizeof(type))
                                       ^
svm.cpp:1722:26: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
        double *t=Malloc(double,l);
                  ~~~~~~~~~~~~~~^~
svm.cpp:39:40: note: expanded from macro 'Malloc'
#define Malloc(type,n) (type *)malloc((n)*sizeof(type))
                                       ^
svm.cpp:1833:29: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]

类型转换在libSVM中有问题吗？

0 个答案: