Created attachment 121321 [details]
patch to add missing include

The test in test/strmode.c can fail to compile depending on the optimization flags used.

The constants that are used in this file (S_IFREG etc.) come from the "sys/stat.h" include file. It seems gcc ignores this error if one compiles with "-O2" (default), but if one uses no optimization it fails.

Add the missing include and it works all the time, see attached patch. Please apply.

Reproduce:
./configure CFLAGS=""
make
make check

Error:
strmode.c: In function ‘main’:
strmode.c:41:17: error: ‘S_IFREG’ undeclared (first use in this function)
  strmode(0777 | S_IFREG, mode_str);
                 ^
strmode.c:41:17: note: each undeclared identifier is reported only once for each function it appears in
strmode.c:44:27: error: ‘S_ISUID’ undeclared (first use in this function)
  strmode(0777 | S_IFREG | S_ISUID | S_ISGID | S_ISVTX, mode_str);
                           ^
[...]