btrfs-progs: build: check if FIEMAP_EXTENT_SHARED is defined

Detect the macro at configure time rather than during compilation.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/configure.ac b/configure.ac
index c79472c..901d434 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -113,6 +113,8 @@ if test "x$enable_convert" = xyes; then
        PKG_CHECK_MODULES(COM_ERR, [com_err])
 fi
 
+AX_CHECK_DEFINE([linux/fiemap.h], [FIEMAP_EXTENT_SHARED], [],
+               [AC_MSG_ERROR([no definition of FIEMAP_EXTENT_SHARED found])])
 
 dnl Define <NAME>_LIBS= and <NAME>_CFLAGS= by pkg-config
 dnl