make static lib build/install controllable so we can disable it by default

punt the -debug lib variants ... if people want debug libs, they can rebuild
the package using their desired build settings.

--- a/Makefile
+++ b/Makefile
@@ -291,8 +291,10 @@
 OPT_LIB_SHARED      = libustr-$(VERS_BSO).so.$(VERS_ESO)
 OPT_LIB_STATIC      = libustr.a
 
-LIB_SHARED = $(DBG_LIB_SHARED) $(OPT_LIB_SHARED)
-LIB_STATIC = $(DBG_LIB_STATIC) $(OPT_LIB_STATIC)
+LIB_SHARED = $(OPT_LIB_SHARED)
+ifeq ($(USE_STATIC),yes)
+LIB_STATIC = $(OPT_LIB_STATIC)
+endif
 
 DEPS_NONC_ALL  = $(SRC_HDRS) $(SRC_SRCS_H)
 DEPS_C_ALL     = $(SRC_HDRS)
@@ -388,17 +390,14 @@
 		install -d $(DESTDIR)$(bindir)
 		install -d $(DESTDIR)$(libdir)/pkgconfig
 		$(HIDE)echo Installing files
+ifeq ($(USE_STATIC),yes)
 		install -m 644 -t $(DESTDIR)$(libdir) $(LIB_STATIC)
+endif
 		install -m 755 -t $(DESTDIR)$(libdir) $(LIB_SHARED)
 		-rm -f $(DESTDIR)$(libdir)/$(OPT_LIB_SHARED_NAME)
 		ln -s $(OPT_LIB_SHARED) $(DESTDIR)$(libdir)/$(OPT_LIB_SHARED_NAME)
 		-rm -f $(DESTDIR)$(libdir)/$(OPT_LIB_SHAREDEV)
 		ln -s $(OPT_LIB_SHARED_NAME) $(DESTDIR)$(libdir)/$(OPT_LIB_SHAREDEV)
-		-rm -f $(DESTDIR)$(libdir)/$(DBG_LIB_SHARED_NAME)
-		ln -s $(DBG_LIB_SHARED) $(DESTDIR)$(libdir)/$(DBG_LIB_SHARED_NAME)
-		-rm -f $(DESTDIR)$(libdir)/$(DBG_LIB_SHAREDEV)
-		ln -s $(DBG_LIB_SHARED_NAME) $(DESTDIR)$(libdir)/$(DBG_LIB_SHAREDEV)
-		$(LDCONFIG) -n $(DESTDIR)$(libdir)
 		install -pm 644 -t $(DESTDIR)$(includedir) $(SRC_HDRS)
 		install -pm 644 -t $(DESTDIR)$(SHRDIR) $(SRC_SRCS)
 		install -pm 644 -t $(DESTDIR)$(SHRDIR) $(XSRC_SRCS)
@@ -406,7 +406,7 @@ endif
 		install -pm 644 -t $(DESTDIR)$(mandir)/man1 $(MAN_PAGES_1)
 		install -pm 644 -t $(DESTDIR)$(mandir)/man3 $(MAN_PAGES_3)
 		install -m 755 -t $(DESTDIR)$(bindir) ustr-import
-		install -pm 644 -t $(DESTDIR)$(libdir)/pkgconfig ustr.pc ustr-debug.pc
+		install -pm 644 -t $(DESTDIR)$(libdir)/pkgconfig ustr.pc
 
 ustr-import-multilib: ustr-import-multilib.in
 		sed -e 's,@INCLUDEDIR@,$(includedir),g' -e 's,@MBINDIR@,$(MBINDIR),g' < $< > $@