improve cmake minver

xmake/plugins/project/cmake/cmakelists.lua

@@ -31,6 +31,7 @@ import("private.utils.batchcmds")
 import("private.utils.rule_groups")
 import("private.utils.target", {alias = "target_utils"})
 import("plugins.project.utils.target_cmds", {rootdir = os.programdir()})
+import("rules.c++.modules.modules_support.compiler_support", {alias = "module_compiler_support", rootdir = os.programdir()})
 
 -- get cmake version
 function _get_cmake_version()
@@ -45,12 +46,28 @@ function _get_cmake_version()
     return cmake_version
 end
 
+-- has c++ modules sources
+function _has_cxxmodules_sources()
+    for _, target in ipairs(project.ordertargets()) do
+        if module_compiler_support.contains_modules(target) then
+            return true
+        end
+    end
+end
+
 -- get minimal cmake version
 function _get_cmake_minver()
     local cmake_minver = _g.cmake_minver
     if not cmake_minver then
         cmake_minver = _get_cmake_version()
-        if not cmake_minver or cmake_minver:gt("3.15.0") then
+        if cmake_minver then
+            if _has_cxxmodules_sources() and cmake_minver:gt("3.28.0") then
+                cmake_minver = semver.new("3.28.0")
+            elseif cmake_minver:gt("3.15.0") then
+                cmake_minver = semver.new("3.15.0")
+            end
+        end
+        if not cmake_minver then
             cmake_minver = semver.new("3.15.0")
         end
         _g.cmake_minver = cmake_minver
@@ -113,10 +130,10 @@ function _get_relative_unix_path_to_cmake(filepath, outputdir)
     return os.args(filepath)
 end
 
--- get enabled languages from targets
-function _get_project_languages(targets)
+-- get enabled languages
+function _get_project_languages()
     local languages = {}
-    for _, target in table.orderpairs(targets) do
+    for _, target in ipairs(project.ordertargets()) do
         for _, sourcekind in ipairs(target:sourcekinds()) do
             if     sourcekind == "cc"  then table.insert(languages, "C")
             elseif sourcekind == "cxx" then table.insert(languages, "CXX")
@@ -146,8 +163,8 @@ end
 
 -- Did the current cmake native support for c++ modules?
 function _can_native_support_for_cxxmodules()
-    local cmake_version = _get_cmake_version()
-    if cmake_version and cmake_version:ge("3.28") then
+    local cmake_minver = _get_cmake_minver()
+    if cmake_minver and cmake_minver:ge("3.28") then
         return true
     end
 end
@@ -234,16 +251,16 @@ function _get_flags_from_target(target, flagkind)
 end
 
 -- add project info
-function _add_project(cmakelists, languages, outputdir)
+function _add_project(cmakelists, outputdir)
 
-    local cmake_version = _get_cmake_minver()
+    local cmake_minver = _get_cmake_minver()
     cmakelists:print([[# this is the build file for project %s
 # it is autogenerated by the xmake build system.
 # do not edit by hand.
 ]], project.name() or "")
     cmakelists:print("# project")
-    cmakelists:print("cmake_minimum_required(VERSION %s)", cmake_version)
-    if cmake_version:ge("3.15.0") then
+    cmakelists:print("cmake_minimum_required(VERSION %s)", cmake_minver)
+    if cmake_minver:ge("3.15.0") then
         -- for MSVC_RUNTIME_LIBRARY
         cmakelists:print("cmake_policy(SET CMP0091 NEW)")
     end
@@ -260,6 +277,7 @@ function _add_project(cmakelists, languages, outputdir)
         if project_version then
             project_info = project_info .. " VERSION " .. project_version
         end
+        local languages = _get_project_languages()
         if languages then
             cmakelists:print("project(%s%s LANGUAGES %s)", project_name, project_info, table.concat(languages, " "))
         else
@@ -840,7 +858,7 @@ function _add_target_link_libraries(cmakelists, target, outputdir)
         cmakelists:print(")")
     end
 
-    -- ignore c++ modules rules
+    -- get c++ modules rules
     local cxxmodules_rules
     if _can_native_support_for_cxxmodules() then
         cxxmodules_rules = _get_cxxmodules_rules()
@@ -1130,7 +1148,7 @@ end
 function _generate_cmakelists(cmakelists, outputdir)
 
     -- add project info
-    _add_project(cmakelists, _get_project_languages(project.targets()), outputdir)
+    _add_project(cmakelists, outputdir)
 
     -- add targets
     for _, target in table.orderpairs(project.targets()) do