我在安装 R 库时遇到了很大的困难,该库需要在 C 中进行一些编译。我正在使用 Mac OSX Snow Leopard 机器并尝试安装此 R 包(here)。
我查看了 the thread 谈论 Mac 上的 getline 并尝试了其中一些修复,但没有任何效果! 我是个新手,不懂C,所以这可能就是原因! 谁能给我一些关于如何修改此包中的文件以使其安装的提示? 任何帮助将不胜感激! 这是我收到的错误:
** libs
** arch - i386
g++ -arch i386 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/i386 -I/usr/local/include -D_FASTMAP -DMAQ_LONGREADS -fPIC -g -O2 -c bed2vector.C -o bed2vector.o
In file included from /usr/include/c++/4.2.1/backward/strstream:51,
from bed2vector.C:8:
/usr/include/c++/4.2.1/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <iostream> instead of the deprecated header <iostream.h>. To disable this warning use -Wno-deprecated.
bed2vector.C: In function ‘int get_a_line(FILE*, BZFILE*, int, std::string&)’:
bed2vector.C:74: error: no matching function for call to ‘getline(char**, size_t*, FILE*&)’
make: *** [bed2vector.o] Error 1
chmod: /Library/Frameworks/R.framework/Resources/library/spp/libs/i386/*: No such file or directory
ERROR: compilation failed for package 'spp'
最简单的解决方案可能是将
getline()
的静态定义添加到 bed2vector.c
。这可能就足够了:
/* PASTE AT TOP OF FILE */
#include <stdio.h> /* flockfile, getc_unlocked, funlockfile */
#include <stdlib.h> /* malloc, realloc */
#include <errno.h> /* errno */
#include <unistd.h> /* ssize_t */
extern "C" ssize_t getline(char **lineptr, size_t *n, FILE *stream);
/* PASTE REMAINDER AT BOTTOM OF FILE */
ssize_t
getline(char **linep, size_t *np, FILE *stream)
{
char *p = NULL;
size_t i = 0;
if (!linep || !np) {
errno = EINVAL;
return -1;
}
if (!(*linep) || !(*np)) {
*np = 120;
*linep = (char *)malloc(*np);
if (!(*linep)) {
return -1;
}
}
flockfile(stream);
p = *linep;
for (int ch = 0; (ch = getc_unlocked(stream)) != EOF;) {
if (i > *np) {
/* Grow *linep. */
size_t m = *np * 2;
char *s = (char *)realloc(*linep, m);
if (!s) {
int error = errno;
funlockfile(stream);
errno = error;
return -1;
}
*linep = s;
*np = m;
}
p[i] = ch;
if ('\n' == ch) break;
i += 1;
}
funlockfile(stream);
/* Null-terminate the string. */
if (i > *np) {
/* Grow *linep. */
size_t m = *np * 2;
char *s = (char *)realloc(*linep, m);
if (!s) {
return -1;
}
*linep = s;
*np = m;
}
p[i + 1] = '\0';
return ((i > 0)? i : -1);
}
这不能处理线长于
ssize_t
可以表示的最大值的情况。如果您遇到这种情况,您可能还会遇到其他问题。