我写过最小的测试问题:
#include <sys/types.h>
int main(int argc, char** argv) {
off_t l = 0;
return 0;
}
Run Code Online (Sandbox Code Playgroud)
以下作品: g++ test.cpp
但如果我尝试使用c ++ 11进行编译,我会得到:
c:\ test> g ++ -std = c ++ 11 test.cpp
test.cpp: In function 'int main(int, char**)':
test.cpp:5:2: error: 'off_t' was not declared in this scope
test.cpp:5:8: error: expected ';' before 'l'
test.cpp:6:9: error: 'l' was not declared in this scope
Run Code Online (Sandbox Code Playgroud)
任何人都可以解释为什么会这样?这困扰我的原因是我试图在我的c ++ 11代码中使用zlib库.库zlib.h使用off_t很多.
我的编译器版本是:gcc 4.7.2
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/mingw32/4.7.2/lto-wrapper.exe
Target: mingw32
Configured with: ../gcc-4.7.2/configure --enable-languages=c,c++,ada,fortran,objc,obj-c++ --disable-sjlj-exceptions --with-dwarf2 …Run Code Online (Sandbox Code Playgroud)