X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=daemon%2Fconfigure.ac;h=243f353a6779de20ffc5218e66c2684eb24e94be;hp=dc6936bf0e47a479a2b2b2c10c98819089917dbd;hb=0f2e9c84e9ff1071260770930068642ecc8ac0d9;hpb=bf920f57677c67f903cf8c4c985ce3d290b1dbde

diff --git a/daemon/configure.ac b/daemon/configure.ac
index dc6936b..243f353 100644
--- a/daemon/configure.ac
+++ b/daemon/configure.ac
@@ -65,6 +65,22 @@ AC_CHECK_LIB([portablexdr],[xdrmem_create],[],[
 dnl Functions which may not be available in older distributions.
 AC_CHECK_FUNCS([futimens listxattr llistxattr getxattr lgetxattr setxattr lsetxattr removexattr lremovexattr])
 
+dnl For modified printf, we need glibc either (old-style)
+dnl register_printf_function or (new-style) register_printf_specifier.
+AC_CHECK_FUNC([register_printf_specifier],[
+	AC_DEFINE([HAVE_REGISTER_PRINTF_SPECIFIER],[1],
+		[Define to 1 if you have new-style register_printf_specifier])
+	],[
+	AC_CHECK_FUNC([register_printf_function],[
+		AC_DEFINE([HAVE_REGISTER_PRINTF_FUNCTION],[1],
+			[Define to 1 if you have old-style register_printf_function])
+		],[
+		AC_MSG_FAILURE(
+[No support for glibc-style extended printf formatters.
+
+This means you either have a very old glibc (pre-2.0) or you
+are using some other libc where this is not supported.])])])
+
 dnl Headers.
 AC_CHECK_HEADERS([attr/xattr.h sys/xattr.h])