Fixed that annoying ar warning about -u being ignored.

config/linux-gnulibc1

@@ -30,6 +30,11 @@ if test -z "$CC"; then
     fi
 fi
 
+# Set flags for gnu ar (apparently via libtool, so AR_FLAGS, not ARFLAGS)
+# If you don't do this, you will get warnings about the 'u' in
+# automake's default 'cru' args.
+AR_FLAGS=crD
+
 # Figure out GNU C compiler flags
 . $srcdir/config/gnu-flags
 

configure.ac

@@ -99,6 +99,7 @@ AC_CONFIG_COMMANDS([pubconf], [
 AC_CANONICAL_HOST
 AC_SUBST([CPPFLAGS])
 AC_SUBST([JNIFLAGS])
+AC_SUBST([AR_FLAGS])
 
 ## H5_CFLAGS (and company) are for CFLAGS that should be used on HDF5, but
 ## not exported to h5cc (or h5fc, etc.)
@@ -139,6 +140,7 @@ JNIFLAGS="${JNIFLAGS}"
 JAVACFLAGS="${JAVACFLAGS}"
 JAVAFLAGS="${JAVAFLAGS}"
 LDFLAGS="${LDFLAGS}"
+AR_FLAGS="${AR_FLAGS}"
 
 ## Configure may need to alter any of the *FLAGS variables in order for
 ## various checks to work correctly. Save the user's value here so it

src/libhdf5.settings.in

@@ -28,6 +28,7 @@ Linking Options:
                      AM_LDFLAGS: @AM_LDFLAGS@
                 Extra libraries: @LIBS@
                        Archiver: @AR@
+                       AR_FLAGS: @AR_FLAGS@
                          Ranlib: @RANLIB@
 
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