xo-alloc + xo-allocutil: refactor to shrink dep surface area

CMakeLists.txt

@@ -0,0 +1,43 @@
+# xo-allocutil/CMakeLists.txt
+
+cmake_minimum_required(VERSION 3.10)
+
+project(xo_allocutil VERSION 0.1)
+enable_language(CXX)
+
+# common XO macros (see github:Rconybea/xo-cmake)
+include(GNUInstallDirs)
+include(cmake/xo-bootstrap-macros.cmake)
+
+xo_cxx_toplevel_options3()
+
+# ----------------------------------------------------------------
+# c++ settings
+
+set(PROJECT_CXX_FLAGS "")
+add_definitions(${PROJECT_CXX_FLAGS})
+
+# ----------------------------------------------------------------
+# output targets
+
+#add_subdirectory(utest)
+
+# ----------------------------------------------------------------
+# header-only library
+
+set(SELF_LIB xo_allocutil)
+xo_add_headeronly_library(${SELF_LIB})
+
+# ----------------------------------------------------------------
+#
+xo_install_library4(${SELF_LIB} ${PROJECT_NAME}Targets)
+# (note: ..Targets from xo_install_library2())
+xo_export_cmake_config(${PROJECT_NAME} ${PROJECT_VERSION} ${PROJECT_NAME}Targets)
+
+# ----------------------------------------------------------------
+# input dependencies
+
+# NOTE: dependency set here must be kept consistent with allocutil/cmake/xo_allocutilConfig.cmake.in
+
+# xo-allocutil is also header-only
+#xo_headeronly_dependency(${SELF_LIB} randomgen)