[v2] configure.ac: Add --without-libudev option to avoid automagic dep
Commit Message
configure currently checks for and links against libudev
unconditionally, If this was unwanted and the library is removed then
this can leave v4l-utils broken. This is a problem for distributions,
especially Gentoo Linux where it affects end users. libudev is
unlikely to be removed entirely but the 32-bit library may be removed
from a 64-bit system, breaking a 32-bit build of v4l-utils.
Signed-off-by: James Le Cuirot <chewi@gentoo.org>
---
configure.ac | 27 +++++++++++++++++----------
1 file changed, 17 insertions(+), 10 deletions(-)
@@ -291,16 +291,23 @@ else
AC_MSG_WARN(ALSA library not available)
fi
-PKG_CHECK_MODULES(libudev, libudev, have_libudev=yes, have_libudev=no)
-if test "x$have_libudev" = "xyes"; then
- AC_DEFINE([HAVE_LIBUDEV], [], [Use libudev])
- LIBUDEV_CFLAGS="$libudev_CFLAGS"
- LIBUDEV_LIBS="$libudev_LIBS"
- AC_SUBST(LIBUDEV_CFLAGS)
- AC_SUBST(LIBUDEV_LIBS)
-else
- AC_MSG_WARN(udev library not available)
-fi
+AC_ARG_WITH([libudev],
+ AS_HELP_STRING([--without-libudev], [Do not use udev library]),
+ [],
+ [with_libudev=yes])
+
+have_libudev=no
+
+AS_IF([test "x$with_libudev" != xno -o "x$enable_libdvbv5" != xno],
+ [PKG_CHECK_MODULES(libudev, libudev, have_libudev=yes, [])
+ AS_IF([test "x$have_libudev" = xyes],
+ [AC_DEFINE([HAVE_LIBUDEV], [], [Use libudev])
+ LIBUDEV_CFLAGS="$libudev_CFLAGS"
+ LIBUDEV_LIBS="$libudev_LIBS"
+ AC_SUBST(LIBUDEV_CFLAGS)
+ AC_SUBST(LIBUDEV_LIBS)],
+ AC_MSG_WARN(udev library not available)
+ )])
AC_SUBST([JPEG_LIBS])