lenmom opened a new pull request #1602: include header file for ‘preadv'  which 
caused break build on ubuntu 18.04
URL: https://github.com/apache/incubator-doris/pull/1602
 
 
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/env/env_posix.cpp:99:27:
 error: ‘preadv’ was not declared in this scope
            RETRY_ON_EINTR(r, preadv(fd, iov + completed_iov, iov_count, 
cur_offset));
                              ^
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/gutil/macros.h:269:12:
 note: in definition of macro ‘RETRY_ON_EINTR’
      (err) = (expr); \
               ^~~~
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/env/env_posix.cpp:99:27:
 note: suggested alternative: ‘pread’
            RETRY_ON_EINTR(r, preadv(fd, iov + completed_iov, iov_count, 
cur_offset));
                              ^
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/gutil/macros.h:269:12:
 note: in definition of macro ‘RETRY_ON_EINTR’
      (err) = (expr); \
               ^~~~
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/env/env_posix.cpp:
 In function ‘doris::Status doris::do_writev_at(int, const string&, uint64_t, 
const doris::Slice*, size_t, size_t*)’:
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/env/env_posix.cpp:156:27:
 error: ‘pwritev’ was not declared in this scope
            RETRY_ON_EINTR(w, pwritev(fd, iov + completed_iov, iov_count, 
cur_offset));
                              ^
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/gutil/macros.h:269:12:
 note: in definition of macro ‘RETRY_ON_EINTR’
      (err) = (expr); \
               ^~~~
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/env/env_posix.cpp:156:27:
 note: suggested alternative: ‘pwrite’
            RETRY_ON_EINTR(w, pwritev(fd, iov + completed_iov, iov_count, 
cur_offset));
                              ^
   
/media/lenmom/新加卷/workspace/open-source/incubator-doris-DORIS-0.11.5-alpha/be/src/gutil/macros.h:269:12:
 note: in definition of macro ‘RETRY_ON_EINTR’
      (err) = (expr); \
               ^~~~
   src/env/CMakeFiles/Env.dir/build.make:62: recipe for target 
'src/env/CMakeFiles/Env.dir/env_posix.cpp.o' failed
   make[2]: *** [src/env/CMakeFiles/Env.dir/env_posix.cpp.o] Error 1
   CMakeFiles/Makefile2:361: recipe for target 'src/env/CMakeFiles/Env.dir/all' 
failed
   make[1]: *** [src/env/CMakeFiles/Env.dir/all] Error 2
   make[1]: *** Waiting for unfinished jobs....

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