【COCOS2DX-ANDROID-游戏开发之十九】android编译之ctime:66: error: ‘::clock_t’ has not been declared
编译android 报错，ctime:66: error: ‘::clock_t’ has not been declared,诡异的问题如下图：
报一个gnu的C++标准库的ctime的错误
程序中根本木有调用<ctime>，那这个诡异的问题是怎么来的呢？
后来发现我有一个类Time.h和Time.cpp，对就是这货，且不管为什么GNU为什么不识别大小写，为什么和标准库的<time.h>起冲突，但这个诡异的问题足以告诉我们：
一定不要起类名和标准库一样的名字，否则暂时木有问题，早晚会自食苦果的~~
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国外的盆友也遇到类似的问题：给个copy
So I lost a bit of time to this compiler error coming from a MacBook and OSX 10.5:
/usr/include/c++/4.0.0/ctime:66: error: ‘::clock_t’ has not been declared
/usr/include/c++/4.0.0/ctime:68: error: ‘::tm’ has not been declared
/usr/include/c++/4.0.0/ctime:70: error: ‘::clock’ has not been declared
/usr/include/c++/4.0.0/ctime:71: error: ‘::difftime’ has not been declared
/usr/include/c++/4.0.0/ctime:72: error: ‘::mktime’ has not been declared
/usr/include/c++/4.0.0/ctime:73: error: ‘::time’ has not been declared
/usr/include/c++/4.0.0/ctime:74: error: ‘::asctime’ has not been declared
/usr/include/c++/4.0.0/ctime:75: error: ‘::ctime’ has not been declared
/usr/include/c++/4.0.0/ctime:76: error: ‘::gmtime’ has not been declared
/usr/include/c++/4.0.0/ctime:77: error: ‘::localtime’ has not been declared
/usr/include/c++/4.0.0/ctime:78: error: ‘::strftime’ has not been declared
/usr/include/c++/4.0.0/bits/locale_facets.tcc: In member function ‘_InIter std::time_get<_CharT, _InIter>::_M_extract_via_format(_InIter, _InIter, std::ios_base&, std::_Ios_Iostate&, tm*, const _CharT*) const’:
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1794: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1801: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1809: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1816: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1828: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1835: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1838: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1850: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1855: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1863: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1867: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1887: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1923: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc:1931: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc: In member function ‘virtual _InIter std::time_get<_CharT, _InIter>::do_get_weekday(_InIter, _InIter, std::ios_base&, std::_Ios_Iostate&, tm*) const’:
/usr/include/c++/4.0.0/bits/locale_facets.tcc:2157: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc: In member function ‘virtual _InIter std::time_get<_CharT, _InIter>::do_get_monthname(_InIter, _InIter, std::ios_base&, std::_Ios_Iostate&, tm*) const’:
/usr/include/c++/4.0.0/bits/locale_facets.tcc:2203: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
/usr/include/c++/4.0.0/bits/locale_facets.tcc: In member function ‘virtual _InIter std::time_get<_CharT, _InIter>::do_get_year(_InIter, _InIter, std::ios_base&, std::_Ios_Iostate&, tm*) const’:
/usr/include/c++/4.0.0/bits/locale_facets.tcc:2230: error: invalid use of undefined type ‘struct tm’
/usr/include/wchar.h:152: error: forward declaration of ‘struct tm’
The answer is that is that the Mac OS X GCC compile environment is funny about case sensitivity and redefining things. In this case somewhere in my -I/mylibpath/include/ was a file Time.h. The system saw this as a redefinition of time.h and got all confused. Note that I didn’t even use that Time.h in my main.c, nor did any header I used call it. It just saw the file from my -I/path/. I renamed the file to oTime.h and did a find/replace on all affected library files and I was on to the next compiler error. Of course that turned out to be an undefined INT_MAX. Same problem different file. In the includes, there was a Limits.h that included limits.h but added to defines. Once again, Limits.h becomes oLimits.h and a find/replace (I’m playing with TextWrangler for this). Good luck.