libsupport: fix compilation on RHEL 5.x due to missing magic define

RHEL 5.x does have magic.h, but it does not define all expected symbols. In
particular, the NO_CHECK symbols were only added in file 4.20 and RHEL 5.x
is using 4.17.

Add substitute defines to allow continued usage of magic but without the
requested exclude checks.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/lib/support/plausible.c b/lib/support/plausible.c
index 6f0c4bc..0636061 100644 (file)
--- a/lib/support/plausible.c
+++ b/lib/support/plausible.c
@@ -43,6 +43,17 @@ static const char *(*dl_magic_file)(magic_t, const char *);
 static int (*dl_magic_load)(magic_t, const char *);
 static void (*dl_magic_close)(magic_t);
 
+/*
+ * NO_CHECK functionality was only added in file 4.20.
+ * Older systems like RHEL 5.x still have file 4.17
+ */
+#ifndef MAGIC_NO_CHECK_COMPRESS
+#define MAGIC_NO_CHECK_COMPRESS 0x0001000
+#endif
+#ifndef MAGIC_NO_CHECK_ELF
+#define MAGIC_NO_CHECK_ELF 0x0010000
+#endif
+
 #ifdef HAVE_DLOPEN
 #include <dlfcn.h>