configure: break up AC_CHECK_HEADERS into one header-file per line

Break up AC_CHECK_HEADERS macro into one header-file per line so it's
easier to read and make changes.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>

diff --git a/configure.ac b/configure.ac
index ab2e49dd707a32f74acba6ed5c923a93f9e970de..4c3afa36720330963ea0c532e92af2e3a2ccf5e4 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -582,7 +582,22 @@ AC_CHECK_MEMBER([struct fiemap_extent.fe_logical],
        [AC_MSG_NOTICE([linux/fiemap.h was not found or not usable; using local Ceph copy])],
        [[#include <linux/fiemap.h>]])
 
-AC_CHECK_HEADERS([sys/xattr.h arpa/inet.h netdb.h netinet/in.h sys/file.h sys/ioctl.h sys/mount.h sys/param.h sys/socket.h sys/statvfs.h sys/time.h sys/vfs.h syslog.h utime.h])
+AC_CHECK_HEADERS([ \
+       arpa/inet.h \
+       netdb.h \
+       netinet/in.h \
+       sys/file.h \
+       sys/ioctl.h \
+       sys/mount.h \
+       sys/param.h \
+       sys/socket.h \
+       sys/statvfs.h \
+       sys/time.h \
+       sys/vfs.h \
+       sys/xattr.h \
+       syslog.h \
+       utime.h \
+])
 
 # sync_file_range
 AC_CHECK_FUNC([sync_file_range],