fix 'make' when using glibc >= 2.28

glibc >= 2.28 supports `statx` out of the box. This means we get an
error when attempting to build `liburing` when glibc is >= 2.28, for
e.g. in my glibc version 2.33 I get the following errors

```
:26:8: error: redefinition of ‘struct statx_timestamp’
   26 | struct statx_timestamp
      |        ^~~~~~~~~~~~~~~
In file included from statx.c:14:
```
or
```
error: redefinition of ‘struct statx’
   30 | struct statx
      |        ^~~~~
In file included from statx.c:14:
```
This commit fixes 'make' error by choosing to use the glibc version
of `statx` if available.

glibc 2.28 release notes:
https://sourceware.org/git/?p=glibc.git;a=blob;f=NEWS;h=154ab22d7ca065af5233406927302bb7f6a66890;hb=3c03baca37fdcb52c3881e653ca392bba7a99c2b#l84

Signed-off-by: Bikal Lem <gbikal+git@gmail.com>

6 files changed, 37 insertions, 2 deletions

diff --git a/configure b/configure
index d2866b3..2061148 100755
--- a/configure
+++ b/configure
@@ -268,7 +268,6 @@ print_config "__kernel_timespec" "$__kernel_timespec"
 open_how="no"
 cat > $TMPC << EOF
 #include <sys/types.h>
-#include <sys/stat.h>
 #include <fcntl.h>
 #include <string.h>
 #include <linux/openat2.h>
@@ -309,6 +308,27 @@ fi
 print_config "statx" "$statx"
 
 ##########################################
+# check for glibc statx
+glibc_statx="no"
+cat > $TMPC << EOF
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <linux/stat.h>
+int main(int argc, char **argv)
+{
+  struct statx x;
+
+  return memset(&x, 0, sizeof(x)) != NULL;
+}
+EOF
+if compile_prog "" "" "glibc_statx"; then
+  glibc_statx="yes"
+fi
+print_config "glibc_statx" "$glibc_statx"
+
+##########################################
 # check for C++
 has_cxx="no"
 cat > $TMPC << EOF
@@ -380,6 +400,9 @@ fi
 if test "$statx" = "yes"; then
   output_sym "CONFIG_HAVE_STATX"
 fi
+if test "$glibc_statx" = "yes"; then
+  output_sym "CONFIG_HAVE_GLIBC_STATX"
+fi
 if test "$has_cxx" = "yes"; then
   output_sym "CONFIG_HAVE_CXX"
 fi
@@ -448,6 +471,12 @@ else cat >> $compat_h << EOF
 
 EOF
 fi
+if test "$glibc_statx" = "no" && "$statx" = "yes"; then
+cat >> $compat_h << EOF
+#include <sys/stat.h>
+
+EOF
+fi
 
 cat >> $compat_h << EOF
 #endif
diff --git a/src/include/liburing.h b/src/include/liburing.h
index fc81542..169e098 100644
--- a/src/include/liburing.h
+++ b/src/include/liburing.h
@@ -8,7 +8,6 @@
 
 #include <sys/socket.h>
 #include <sys/uio.h>
-#include <sys/stat.h>
 #include <errno.h>
 #include <signal.h>
 #include <stdbool.h>
diff --git a/test/Makefile b/test/Makefile
index f7eafad..d6e7227 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -157,6 +157,10 @@ include ../Makefile.quiet
 ifdef CONFIG_HAVE_STATX
 	test_srcs += statx.c
 endif
+
+ifdef CONFIG_HAVE_GLIBC_STATX
+	test_srcs += statx.c
+endif
 all_targets += statx
 
 
diff --git a/test/file-verify.c b/test/file-verify.c
index 50cad45..327cb1d 100644
--- a/test/file-verify.c
+++ b/test/file-verify.c
@@ -12,6 +12,7 @@
 #include <assert.h>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <sys/stat.h>
 #include <linux/fs.h>
 
 #include "helpers.h"
diff --git a/test/rename.c b/test/rename.c
index af09d65..7798d43 100644
--- a/test/rename.c
+++ b/test/rename.c
@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <fcntl.h>
+#include <sys/stat.h>
 
 #include "liburing.h"
 
diff --git a/test/unlink.c b/test/unlink.c
index f8c7639..e4c210b 100644
--- a/test/unlink.c
+++ b/test/unlink.c
@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <fcntl.h>
+#include <sys/stat.h>
 
 #include "liburing.h"