build: support some non-standard ar variants

This adds support for the TI and Microsoft (lib.exe) variants of
the ar utility.
Signed-off-by: Mans Rullgard <mans@mansr.com>

configure

@@ -2415,6 +2415,17 @@ if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
     DEPCCFLAGS=$_flags
 fi
 
+if $ar 2>&1 | grep -q Microsoft; then
+    arflags="-nologo"
+    ar_o='-out:$@'
+elif $ar 2>&1 | grep -q 'Texas Instruments'; then
+    arflags="rq"
+    ar_o='$@'
+else
+    arflags="rc"
+    ar_o='$@'
+fi
+
 add_cflags $extra_cflags
 add_asflags $extra_cflags
 
@@ -3645,6 +3656,8 @@ DEPASFLAGS=$DEPASFLAGS \$(CPPFLAGS)
 YASM=$yasmexe
 DEPYASM=$yasmexe
 AR=$ar
+ARFLAGS=$arflags
+AR_O=$ar_o
 RANLIB=$ranlib
 LN_S=$ln_s
 CPPFLAGS=$CPPFLAGS

library.mak

@@ -25,7 +25,7 @@ $(TESTOBJS): CPPFLAGS += -DTEST
 
 $(SUBDIR)$(LIBNAME): $(OBJS)
 	$(RM) $@
-	$(AR) rc $@ $^ $(EXTRAOBJS)
+	$(AR) $(ARFLAGS) $(AR_O) $^ $(EXTRAOBJS)
 	$(RANLIB) $@
 
 install-headers: install-lib$(NAME)-headers install-lib$(NAME)-pkgconfig