move has_flags.lua

1 files changed, 130 insertions, 0 deletions

diff --git a/xmake/modules/core/tools/gcc/features.lua b/xmake/modules/core/tools/gcc/features.lua
new file mode 100644
index 000000000..153cc3fb4
--- /dev/null
+++ b/xmake/modules/core/tools/gcc/features.lua
@@ -0,0 +1,130 @@
+--!A cross-platform build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+-- Copyright (C) 2015-present, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        features.lua
+--
+
+-- imports
+import("cfeatures")
+import("cxxfeatures")
+import("core.language.language")
+
+-- get macro defines
+function _get_macro_defines(snippets, extension, opt)
+
+    -- make an stub source file
+    local sourcefile = os.tmpfile() .. extension
+    io.writefile(sourcefile, table.concat(table.wrap(snippets), "\n"))
+
+    -- get defines
+    local results = {}
+    local defines = try { function () return os.iorunv(opt.program, table.join(opt.flags or {}, {"-dM", "-E", sourcefile}), {envs = opt.envs}) end }
+    if defines then
+        for _, define in ipairs(defines:split("\n")) do
+            local name = define:match("#define%s+(.-)%s+")
+            if name then
+                results[name] = true
+            end
+        end
+    end
+    os.tryrm(sourcefile)
+    return results
+end
+
+-- set feature with condition
+function _set_feature(feature, condition)
+
+    -- init features
+    _g.features = _g.features or {}
+
+    -- get language kind
+    local langkind = feature:match("^(%w-)_")
+    assert(langkind, "unknown language kind for the feature: %s", feature)
+
+    -- get source kind from the language kind
+    local sourcekind = language.langkinds()[langkind]
+    assert(sourcekind, "unknown language kind: " .. langkind)
+
+    -- get extension
+    local extension = table.wrap(language.sourcekinds()[sourcekind])[1]
+    assert(extension, "not supported kind for the feature: %s", feature)
+
+    -- make snippet
+    local snippet = format([[
+#if (%s)
+#   define %s 1
+#endif]], condition, feature)
+
+    -- init features with the given extension
+    local features = _g.features[extension] or {}
+    _g.features[extension] = features
+
+    -- set feature and snippet
+    features[feature] = snippet
+end
+
+-- set features
+function set_features(features)
+    for feature, condition in pairs(features) do
+        _set_feature(feature, condition)
+    end
+end
+
+-- check features
+function check_features(opt)
+
+    -- check features with all extensions
+    local results = {}
+    for extension, features in pairs(_g.features) do
+
+        -- make snippets
+        local snippets = {}
+        for _, snippet in pairs(features) do
+            table.insert(snippets, snippet)
+        end
+
+        -- get defines
+        local defines = _get_macro_defines(snippets, extension, opt)
+
+        -- check features
+        for feature, _ in pairs(features) do
+            if defines[feature] then
+                results[feature] = true
+            end
+        end
+    end
+    return results
+end
+
+-- get features
+--
+-- @param opt   the argument options, e.g. {toolname = "", program = "", programver = "", flags = {}}
+--
+-- @return      the features
+--
+function main(opt)
+
+    -- set features for c
+    set_features(cfeatures())
+
+    -- set features for c++
+    set_features(cxxfeatures())
+
+    -- check features
+    return check_features(opt)
+end
+