improve find toolchains from env vals

5 files changed, 179 insertions, 135 deletions

diff --git a/xmake/platforms/checker.lua b/xmake/platforms/checker.lua
index 3672649e9..458b5f0d5 100644
--- a/xmake/platforms/checker.lua
+++ b/xmake/platforms/checker.lua
@@ -36,20 +36,15 @@ function _toolchain_check(config, toolkind, toolinfo)
     local toolpath = config.get(toolkind)
     if not toolpath then
 
-        -- get name
-        local name = toolinfo.name
+        -- get name and attempt to get `$(env XX)`
+        local name = vformat(toolinfo.name)
+        if #name == 0 then
+            return 
+        end
 
         -- get cross
         local cross = config.get("cross") or toolinfo.cross or ""
 
-        -- get program name from the env if not cross-compilation
-        if config.get("plat") == os.host() and config.get("arch") ==os.arch() then
-            local program = os.getenv(toolkind:upper():split('-')[1])
-            if program and program:trim() ~= "" then
-                toolpath = find_tool(find_toolname(program), {program = program}) 
-            end
-        end
-
         -- attempt to check it 
         if not toolpath then
             toolpath = find_tool(name, {program = cross .. name, pathes = config.get("toolchains"), check = toolinfo.check})
diff --git a/xmake/platforms/linux/check.lua b/xmake/platforms/linux/check.lua
index 82e7737cc..260c8ca9f 100644
--- a/xmake/platforms/linux/check.lua
+++ b/xmake/platforms/linux/check.lua
@@ -63,63 +63,88 @@ function _toolchains(config)
     -- init toolchains
     local toolchains = {}
 
+    -- inset tools from environment variables if not cross-compilation
+    if #cross == 0 then
+        checker.toolchain_insert(toolchains, "cc",  "", "$(env CC)",  "the c compiler")
+        checker.toolchain_insert(toolchains, "cxx", "", "$(env CXX)", "the linker")
+        checker.toolchain_insert(toolchains, "ld",  "", "$(env LD)",  "the linker")
+        checker.toolchain_insert(toolchains, "ld",  "", "$(env CXX)", "the linker")
+        checker.toolchain_insert(toolchains, "ld",  "", "$(env CC)",  "the linker")
+        checker.toolchain_insert(toolchains, "ar",  "", "$(env AR)",  "the static library archiver")
+        checker.toolchain_insert(toolchains, "sh",  "", "$(env SH)",  "the shared library linker")
+        checker.toolchain_insert(toolchains, "mm",  "", "$(env MM)",  "the objc compiler")
+        checker.toolchain_insert(toolchains, "mxx", "", "$(env MXX)", "the objc++ compiler")
+        checker.toolchain_insert(toolchains, "as",  "", "$(env AS)",  "the assember")
+    end
+
     -- insert c/c++ tools to toolchains
-    checker.toolchain_insert(toolchains, "cc",       cross,   "gcc",         "the c compiler") 
-    checker.toolchain_insert(toolchains, "cc",       cross,   "clang",       "the c compiler") 
-    checker.toolchain_insert(toolchains, "cxx",      cross,   "gcc",         "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "cxx",      cross,   "clang",       "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "cxx",      cross,   "g++",         "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "cxx",      cross,   "clang++",     "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "ld",       cross,   "g++",         "the linker") 
-    checker.toolchain_insert(toolchains, "ld",       cross,   "gcc",         "the linker") 
-    checker.toolchain_insert(toolchains, "ld",       cross,   "clang++",     "the linker") 
-    checker.toolchain_insert(toolchains, "ld",       cross,   "clang",       "the linker") 
-    checker.toolchain_insert(toolchains, "ar",       cross,   "ar",          "the static library archiver") 
-    checker.toolchain_insert(toolchains, "ex",       cross,   "ar",          "the static library extractor") 
-    checker.toolchain_insert(toolchains, "sh",       cross,   "g++",         "the shared library linker") 
-    checker.toolchain_insert(toolchains, "sh",       cross,   "gcc",         "the shared library linker") 
-    checker.toolchain_insert(toolchains, "sh",       cross,   "clang++",     "the shared library linker") 
-    checker.toolchain_insert(toolchains, "sh",       cross,   "clang",       "the shared library linker") 
+    checker.toolchain_insert(toolchains, "cc",    cross, "gcc",       "the c compiler")
+    checker.toolchain_insert(toolchains, "cc",    cross, "clang",     "the c compiler")
+    checker.toolchain_insert(toolchains, "cxx",   cross, "gcc",       "the c++ compiler")
+    checker.toolchain_insert(toolchains, "cxx",   cross, "clang",     "the c++ compiler")
+    checker.toolchain_insert(toolchains, "cxx",   cross, "g++",       "the c++ compiler")
+    checker.toolchain_insert(toolchains, "cxx",   cross, "clang++",   "the c++ compiler")
+    checker.toolchain_insert(toolchains, "ld",    cross, "g++",       "the linker")
+    checker.toolchain_insert(toolchains, "ld",    cross, "gcc",       "the linker")
+    checker.toolchain_insert(toolchains, "ld",    cross, "clang++",   "the linker")
+    checker.toolchain_insert(toolchains, "ld",    cross, "clang",     "the linker")
+    checker.toolchain_insert(toolchains, "ar",    cross, "ar",        "the static library archiver")
+    checker.toolchain_insert(toolchains, "ex",    cross, "ar",        "the static library extractor")
+    checker.toolchain_insert(toolchains, "sh",    cross, "g++",       "the shared library linker")
+    checker.toolchain_insert(toolchains, "sh",    cross, "gcc",       "the shared library linker")
+    checker.toolchain_insert(toolchains, "sh",    cross, "clang++",   "the shared library linker")
+    checker.toolchain_insert(toolchains, "sh",    cross, "clang",     "the shared library linker")
 
     -- insert objc/c++ tools to toolchains
-    checker.toolchain_insert(toolchains, "mm",       cross,   "clang",       "the objc compiler") 
-    checker.toolchain_insert(toolchains, "mm",       cross,   "gcc",         "the objc compiler") 
-    checker.toolchain_insert(toolchains, "mxx",      cross,   "clang++",     "the objc++ compiler") 
-    checker.toolchain_insert(toolchains, "mxx",      cross,   "clang",       "the objc++ compiler") 
-    checker.toolchain_insert(toolchains, "mxx",      cross,   "g++",         "the objc++ compiler") 
-    checker.toolchain_insert(toolchains, "mxx",      cross,   "gcc",         "the objc++ compiler") 
+    checker.toolchain_insert(toolchains, "mm",    cross, "clang",     "the objc compiler")
+    checker.toolchain_insert(toolchains, "mm",    cross, "gcc",       "the objc compiler")
+    checker.toolchain_insert(toolchains, "mxx",   cross, "clang++",   "the objc++ compiler")
+    checker.toolchain_insert(toolchains, "mxx",   cross, "clang",     "the objc++ compiler")
+    checker.toolchain_insert(toolchains, "mxx",   cross, "g++",       "the objc++ compiler")
+    checker.toolchain_insert(toolchains, "mxx",   cross, "gcc",       "the objc++ compiler")
 
     -- insert asm tools to toolchains
-    checker.toolchain_insert(toolchains, "as",       cross,   "clang",       "the assember") 
-    checker.toolchain_insert(toolchains, "as",       cross,   "gcc",         "the assember") 
+    checker.toolchain_insert(toolchains, "as",    cross, "clang",     "the assember")
+    checker.toolchain_insert(toolchains, "as",    cross, "gcc",       "the assember")
 
     -- insert golang tools to toolchains
-    checker.toolchain_insert(toolchains, "gc",       "",      "go",          "the golang compiler") 
-    checker.toolchain_insert(toolchains, "gc",       "",      "gccgo",       "the golang compiler") 
-    checker.toolchain_insert(toolchains, "gc-ar",    "",      "go",          "the golang static library archiver") 
-    checker.toolchain_insert(toolchains, "gc-ar",    "",      "gccgo",       "the golang static library archiver") 
-    checker.toolchain_insert(toolchains, "gc-ld",    "",      "go",          "the golang linker") 
-    checker.toolchain_insert(toolchains, "gc-ld",    "",      "gccgo",       "the golang linker") 
+    checker.toolchain_insert(toolchains, "gc",    "",    "$(env GC)", "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc-ar", "",    "$(env GC)", "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ld", "",    "$(env GC)", "the golang linker")
+    checker.toolchain_insert(toolchains, "gc",    "",    "go",        "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc",    "",    "gccgo",     "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc-ar", "",    "go",        "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ar", "",    "gccgo",     "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ld", "",    "go",        "the golang linker")
+    checker.toolchain_insert(toolchains, "gc-ld", "",    "gccgo",     "the golang linker")
 
     -- insert dlang tools to toolchains
-    checker.toolchain_insert(toolchains, "dc",       "",      "dmd",         "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc",       "",      "ldc2",        "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc",       "",      "gdc",         "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",      "dmd",         "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",      "ldc2",        "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",      "gdc",         "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",      "dmd",         "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",      "ldc2",        "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",      "gdc",         "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",      "dmd",         "the dlang linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",      "ldc2",        "the dlang linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",      "gdc",         "the dlang linker") 
+    checker.toolchain_insert(toolchains, "dc",    "",    "$(env DC)", "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc-ar", "",    "$(env Dc)", "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-sh", "",    "$(env DC)", "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",    "$(env DC)", "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc",    "",    "dmd",       "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc",    "",    "ldc2",      "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc",    "",    "gdc",       "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc-ar", "",    "dmd",       "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-ar", "",    "ldc2",      "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-ar", "",    "gdc",       "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-sh", "",    "dmd",       "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-sh", "",    "ldc2",      "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-sh", "",    "gdc",       "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",    "dmd",       "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",    "ldc2",      "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",    "gdc",       "the dlang linker")
 
     -- insert rust tools to toolchains
-    checker.toolchain_insert(toolchains, "rc",       "",      "rustc",       "the rust compiler") 
-    checker.toolchain_insert(toolchains, "rc-ar",    "",      "rustc",       "the rust static library archiver") 
-    checker.toolchain_insert(toolchains, "rc-sh",    "",      "rustc",       "the rust shared library linker") 
-    checker.toolchain_insert(toolchains, "rc-ld",    "",      "rustc",       "the rust linker") 
+    checker.toolchain_insert(toolchains, "rc",    "",    "$(env RC)", "the rust compiler")
+    checker.toolchain_insert(toolchains, "rc-ar", "",    "$(env RC)", "the rust static library archiver")
+    checker.toolchain_insert(toolchains, "rc-sh", "",    "$(env RC)", "the rust shared library linker")
+    checker.toolchain_insert(toolchains, "rc-ld", "",    "$(env RC)", "the rust linker")
+    checker.toolchain_insert(toolchains, "rc",    "",    "rustc",     "the rust compiler")
+    checker.toolchain_insert(toolchains, "rc-ar", "",    "rustc",     "the rust static library archiver")
+    checker.toolchain_insert(toolchains, "rc-sh", "",    "rustc",     "the rust shared library linker")
+    checker.toolchain_insert(toolchains, "rc-ld", "",    "rustc",     "the rust linker")
 
     -- save toolchains
     _g.TOOLCHAINS = toolchains
diff --git a/xmake/platforms/macosx/check.lua b/xmake/platforms/macosx/check.lua
index 56d4e48c6..aec349e4c 100644
--- a/xmake/platforms/macosx/check.lua
+++ b/xmake/platforms/macosx/check.lua
@@ -37,56 +37,80 @@ function _toolchains(config)
     local toolchains = {}
 
     -- insert c/c++ tools to toolchains
-    checker.toolchain_insert(toolchains, "cc",       "xcrun -sdk macosx ",   "clang",        "the c compiler") 
-    checker.toolchain_insert(toolchains, "cxx",      "xcrun -sdk macosx ",   "clang",        "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "cxx",      "xcrun -sdk macosx ",   "clang++",      "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "ld",       "xcrun -sdk macosx ",   "clang++",      "the linker") 
-    checker.toolchain_insert(toolchains, "ld",       "xcrun -sdk macosx ",   "clang",        "the linker") 
-    checker.toolchain_insert(toolchains, "ar",       "xcrun -sdk macosx ",   "ar",           "the static library archiver") 
-    checker.toolchain_insert(toolchains, "ex",       "xcrun -sdk macosx ",   "ar",           "the static library extractor") 
-    checker.toolchain_insert(toolchains, "sh",       "xcrun -sdk macosx ",   "clang++",      "the shared library linker") 
-    checker.toolchain_insert(toolchains, "sh",       "xcrun -sdk macosx ",   "clang",        "the shared library linker") 
+    checker.toolchain_insert(toolchains, "cc",    "",                   "$(env CC)",  "the c compiler")
+    checker.toolchain_insert(toolchains, "cxx",   "",                   "$(env CXX)", "the linker")
+    checker.toolchain_insert(toolchains, "ld",    "",                   "$(env LD)",  "the linker")
+    checker.toolchain_insert(toolchains, "ld",    "",                   "$(env CXX)", "the linker")
+    checker.toolchain_insert(toolchains, "ld",    "",                   "$(env CC)",  "the linker")
+    checker.toolchain_insert(toolchains, "ar",    "",                   "$(env AR)",  "the static library archiver")
+    checker.toolchain_insert(toolchains, "sh",    "",                   "$(env SH)",  "the shared library linker")
+    checker.toolchain_insert(toolchains, "cc",    "xcrun -sdk macosx ", "clang",      "the c compiler")
+    checker.toolchain_insert(toolchains, "cxx",   "xcrun -sdk macosx ", "clang",      "the c++ compiler")
+    checker.toolchain_insert(toolchains, "cxx",   "xcrun -sdk macosx ", "clang++",    "the c++ compiler")
+    checker.toolchain_insert(toolchains, "ld",    "xcrun -sdk macosx ", "clang++",    "the linker")
+    checker.toolchain_insert(toolchains, "ld",    "xcrun -sdk macosx ", "clang",      "the linker")
+    checker.toolchain_insert(toolchains, "ar",    "xcrun -sdk macosx ", "ar",         "the static library archiver")
+    checker.toolchain_insert(toolchains, "ex",    "xcrun -sdk macosx ", "ar",         "the static library extractor")
+    checker.toolchain_insert(toolchains, "sh",    "xcrun -sdk macosx ", "clang++",    "the shared library linker")
+    checker.toolchain_insert(toolchains, "sh",    "xcrun -sdk macosx ", "clang",      "the shared library linker")
 
     -- insert objc/c++ tools to toolchains
-    checker.toolchain_insert(toolchains, "mm",       "xcrun -sdk macosx ",   "clang",        "the objc compiler") 
-    checker.toolchain_insert(toolchains, "mxx",      "xcrun -sdk macosx ",   "clang++",      "the objc++ compiler") 
-    checker.toolchain_insert(toolchains, "mxx",      "xcrun -sdk macosx ",   "clang",        "the objc++ compiler") 
+    checker.toolchain_insert(toolchains, "mm",    "",                   "$(env MM)",  "the objc compiler")
+    checker.toolchain_insert(toolchains, "mxx",   "",                   "$(env MXX)", "the objc++ compiler")
+    checker.toolchain_insert(toolchains, "mm",    "xcrun -sdk macosx ", "clang",      "the objc compiler")
+    checker.toolchain_insert(toolchains, "mxx",   "xcrun -sdk macosx ", "clang++",    "the objc++ compiler")
+    checker.toolchain_insert(toolchains, "mxx",   "xcrun -sdk macosx ", "clang",      "the objc++ compiler")
 
     -- insert asm tools to toolchains
-    checker.toolchain_insert(toolchains, "as",       "xcrun -sdk macosx ",   "clang",        "the assember") 
+    checker.toolchain_insert(toolchains, "as",    "",                   "$(env AS)",  "the assember")
+    checker.toolchain_insert(toolchains, "as",    "xcrun -sdk macosx ", "clang",      "the assember")
 
     -- insert swift tools to toolchains
-    checker.toolchain_insert(toolchains, "sc",       "xcrun -sdk macosx ",   "swiftc",       "the swift compiler") 
-    checker.toolchain_insert(toolchains, "sc-ld",    "xcrun -sdk macosx ",   "swiftc",       "the swift linker") 
-    checker.toolchain_insert(toolchains, "sc-sh",    "xcrun -sdk macosx ",   "swiftc",       "the swift shared library linker") 
+    checker.toolchain_insert(toolchains, "sc",    "",                   "$(env SC)",  "the swift compiler")
+    checker.toolchain_insert(toolchains, "sc-ld", "",                   "$(env SC)",  "the swift linker")
+    checker.toolchain_insert(toolchains, "sc-sh", "",                   "$(env SC)",  "the swift shared library linker")
+    checker.toolchain_insert(toolchains, "sc",    "xcrun -sdk macosx ", "swiftc",     "the swift compiler")
+    checker.toolchain_insert(toolchains, "sc-ld", "xcrun -sdk macosx ", "swiftc",     "the swift linker")
+    checker.toolchain_insert(toolchains, "sc-sh", "xcrun -sdk macosx ", "swiftc",     "the swift shared library linker")
 
     -- insert golang tools to toolchains
-    checker.toolchain_insert(toolchains, "gc",       "",                     "go",           "the golang compiler") 
-    checker.toolchain_insert(toolchains, "gc",       "",                     "gccgo",        "the golang compiler") 
-    checker.toolchain_insert(toolchains, "gc-ar",    "",                     "go",           "the golang static library archiver") 
-    checker.toolchain_insert(toolchains, "gc-ar",    "",                     "gccgo",        "the golang static library archiver") 
-    checker.toolchain_insert(toolchains, "gc-ld",    "",                     "go",           "the golang linker") 
-    checker.toolchain_insert(toolchains, "gc-ld",    "",                     "gccgo",        "the golang linker") 
+    checker.toolchain_insert(toolchains, "gc",    "",                   "$(env GC)",  "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc-ar", "",                   "$(env GC)",  "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ld", "",                   "$(env GC)",  "the golang linker")
+    checker.toolchain_insert(toolchains, "gc",    "",                   "go",         "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc",    "",                   "gccgo",      "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc-ar", "",                   "go",         "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ar", "",                   "gccgo",      "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ld", "",                   "go",         "the golang linker")
+    checker.toolchain_insert(toolchains, "gc-ld", "",                   "gccgo",      "the golang linker")
 
     -- insert dlang tools to toolchains
-    checker.toolchain_insert(toolchains, "dc",       "",                     "dmd",          "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc",       "",                     "ldc2",         "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc",       "",                     "gdc",          "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",                     "dmd",          "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",                     "ldc2",         "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",                     "gdc",          "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",                     "dmd",          "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",                     "ldc2",         "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",                     "gdc",          "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",                     "dmd",          "the dlang linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",                     "ldc2",         "the dlang linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",                     "gdc",          "the dlang linker") 
+    checker.toolchain_insert(toolchains, "dc",    "",                   "$(env DC)",  "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc-ar", "",                   "$(env Dc)",  "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-sh", "",                   "$(env DC)",  "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",                   "$(env DC)",  "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc",    "",                   "dmd",        "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc",    "",                   "ldc2",       "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc",    "",                   "gdc",        "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc-ar", "",                   "dmd",        "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-ar", "",                   "ldc2",       "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-ar", "",                   "gdc",        "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-sh", "",                   "dmd",        "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-sh", "",                   "ldc2",       "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-sh", "",                   "gdc",        "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",                   "dmd",        "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",                   "ldc2",       "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "",                   "gdc",        "the dlang linker")
 
     -- insert rust tools to toolchains
-    checker.toolchain_insert(toolchains, "rc",       "",                     "rustc",        "the rust compiler") 
-    checker.toolchain_insert(toolchains, "rc-ar",    "",                     "rustc",        "the rust static library archiver") 
-    checker.toolchain_insert(toolchains, "rc-sh",    "",                     "rustc",        "the rust shared library linker") 
-    checker.toolchain_insert(toolchains, "rc-ld",    "",                     "rustc",        "the rust linker") 
+    checker.toolchain_insert(toolchains, "rc",    "",                   "$(env RC)",  "the rust compiler")
+    checker.toolchain_insert(toolchains, "rc-ar", "",                   "$(env RC)",  "the rust static library archiver")
+    checker.toolchain_insert(toolchains, "rc-sh", "",                   "$(env RC)",  "the rust shared library linker")
+    checker.toolchain_insert(toolchains, "rc-ld", "",                   "$(env RC)",  "the rust linker")
+    checker.toolchain_insert(toolchains, "rc",    "",                   "rustc",      "the rust compiler")
+    checker.toolchain_insert(toolchains, "rc-ar", "",                   "rustc",      "the rust static library archiver")
+    checker.toolchain_insert(toolchains, "rc-sh", "",                   "rustc",      "the rust shared library linker")
+    checker.toolchain_insert(toolchains, "rc-ld", "",                   "rustc",      "the rust linker")
 
     -- save toolchains
     _g.TOOLCHAINS = toolchains
diff --git a/xmake/platforms/mingw/check.lua b/xmake/platforms/mingw/check.lua
index 887aa43db..c68d3b9a2 100644
--- a/xmake/platforms/mingw/check.lua
+++ b/xmake/platforms/mingw/check.lua
@@ -53,16 +53,16 @@ function _toolchains(config)
 
     -- make toolchains
     local toolchains = {}
-    checker.toolchain_insert(toolchains, "cc",   cross, "gcc",       "the c compiler") 
-    checker.toolchain_insert(toolchains, "cxx",  cross, "g++",       "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "cxx",  cross, "gcc",       "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "as",   cross, "gcc",       "the assember")
-    checker.toolchain_insert(toolchains, "ld",   cross, "g++",       "the linker") 
-    checker.toolchain_insert(toolchains, "ld",   cross, "gcc",       "the linker") 
-    checker.toolchain_insert(toolchains, "ar",   cross, "ar",        "the static library archiver") 
-    checker.toolchain_insert(toolchains, "ex",   cross, "ar",        "the static library extractor") 
-    checker.toolchain_insert(toolchains, "sh",   cross, "g++",       "the shared library linker") 
-    checker.toolchain_insert(toolchains, "sh",   cross, "gcc",       "the shared library linker") 
+    checker.toolchain_insert(toolchains, "cc",  cross, "gcc", "the c compiler")
+    checker.toolchain_insert(toolchains, "cxx", cross, "g++", "the c++ compiler")
+    checker.toolchain_insert(toolchains, "cxx", cross, "gcc", "the c++ compiler")
+    checker.toolchain_insert(toolchains, "as",  cross, "gcc", "the assember")
+    checker.toolchain_insert(toolchains, "ld",  cross, "g++", "the linker")
+    checker.toolchain_insert(toolchains, "ld",  cross, "gcc", "the linker")
+    checker.toolchain_insert(toolchains, "ar",  cross, "ar",  "the static library archiver")
+    checker.toolchain_insert(toolchains, "ex",  cross, "ar",  "the static library extractor")
+    checker.toolchain_insert(toolchains, "sh",  cross, "g++", "the shared library linker")
+    checker.toolchain_insert(toolchains, "sh",  cross, "gcc", "the shared library linker")
 
     -- save toolchains
     _g.TOOLCHAINS = toolchains
diff --git a/xmake/platforms/windows/check.lua b/xmake/platforms/windows/check.lua
index 28ad939bc..75a8c5dee 100644
--- a/xmake/platforms/windows/check.lua
+++ b/xmake/platforms/windows/check.lua
@@ -119,47 +119,47 @@ function _toolchains(config)
     local toolchains = {}
 
     -- insert c/c++ tools to toolchains
-    checker.toolchain_insert(toolchains, "cc",      "",     "cl.exe",           "the c compiler") 
-    checker.toolchain_insert(toolchains, "cxx",     "",     "cl.exe",           "the c++ compiler") 
-    checker.toolchain_insert(toolchains, "mrc",     "",     "rc.exe",           "the resource compiler") 
-    checker.toolchain_insert(toolchains, "ld",      "",     "link.exe",         "the linker") 
-    checker.toolchain_insert(toolchains, "ar",      "",     "link.exe -lib",    "the static library archiver") 
-    checker.toolchain_insert(toolchains, "sh",      "",     "link.exe -dll",    "the shared library linker") 
-    checker.toolchain_insert(toolchains, "ex",      "",     "lib.exe",          "the static library extractor") 
+    checker.toolchain_insert(toolchains, "cc",    "", "cl.exe",        "the c compiler")
+    checker.toolchain_insert(toolchains, "cxx",   "", "cl.exe",        "the c++ compiler")
+    checker.toolchain_insert(toolchains, "mrc",   "", "rc.exe",        "the resource compiler")
+    checker.toolchain_insert(toolchains, "ld",    "", "link.exe",      "the linker")
+    checker.toolchain_insert(toolchains, "ar",    "", "link.exe -lib", "the static library archiver")
+    checker.toolchain_insert(toolchains, "sh",    "", "link.exe -dll", "the shared library linker")
+    checker.toolchain_insert(toolchains, "ex",    "", "lib.exe",       "the static library extractor")
 
     -- insert golang tools to toolchains
-    checker.toolchain_insert(toolchains, "gc",       "",    "go",               "the golang compiler") 
-    checker.toolchain_insert(toolchains, "gc",       "",    "gccgo",            "the golang compiler") 
-    checker.toolchain_insert(toolchains, "gc-ar",    "",    "go",               "the golang static library archiver") 
-    checker.toolchain_insert(toolchains, "gc-ar",    "",    "gccgo",            "the golang static library archiver") 
-    checker.toolchain_insert(toolchains, "gc-ld",    "",    "go",               "the golang linker") 
-    checker.toolchain_insert(toolchains, "gc-ld",    "",    "gccgo",            "the golang linker") 
+    checker.toolchain_insert(toolchains, "gc",    "", "go",            "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc",    "", "gccgo",         "the golang compiler")
+    checker.toolchain_insert(toolchains, "gc-ar", "", "go",            "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ar", "", "gccgo",         "the golang static library archiver")
+    checker.toolchain_insert(toolchains, "gc-ld", "", "go",            "the golang linker")
+    checker.toolchain_insert(toolchains, "gc-ld", "", "gccgo",         "the golang linker")
 
     -- insert dlang tools to toolchains
-    checker.toolchain_insert(toolchains, "dc",       "",    "dmd",              "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc",       "",    "ldc2",             "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc",       "",    "gdc",              "the dlang compiler") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",    "dmd",              "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",    "ldc2",             "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-ar",    "",    "gdc",              "the dlang static library archiver") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",    "dmd",              "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",    "ldc2",             "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-sh",    "",    "gdc",              "the dlang shared library linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",    "dmd",              "the dlang linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",    "ldc2",             "the dlang linker") 
-    checker.toolchain_insert(toolchains, "dc-ld",    "",    "gdc",              "the dlang linker") 
+    checker.toolchain_insert(toolchains, "dc",    "", "dmd",           "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc",    "", "ldc2",          "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc",    "", "gdc",           "the dlang compiler")
+    checker.toolchain_insert(toolchains, "dc-ar", "", "dmd",           "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-ar", "", "ldc2",          "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-ar", "", "gdc",           "the dlang static library archiver")
+    checker.toolchain_insert(toolchains, "dc-sh", "", "dmd",           "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-sh", "", "ldc2",          "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-sh", "", "gdc",           "the dlang shared library linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "", "dmd",           "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "", "ldc2",          "the dlang linker")
+    checker.toolchain_insert(toolchains, "dc-ld", "", "gdc",           "the dlang linker")
 
     -- insert rust tools to toolchains
-    checker.toolchain_insert(toolchains, "rc",       "",    "rustc",            "the rust compiler") 
-    checker.toolchain_insert(toolchains, "rc-ar",    "",    "rustc",            "the rust static library archiver") 
-    checker.toolchain_insert(toolchains, "rc-sh",    "",    "rustc",            "the rust shared library linker") 
-    checker.toolchain_insert(toolchains, "rc-ld",    "",    "rustc",            "the rust linker") 
+    checker.toolchain_insert(toolchains, "rc",    "", "rustc",         "the rust compiler")
+    checker.toolchain_insert(toolchains, "rc-ar", "", "rustc",         "the rust static library archiver")
+    checker.toolchain_insert(toolchains, "rc-sh", "", "rustc",         "the rust shared library linker")
+    checker.toolchain_insert(toolchains, "rc-ld", "", "rustc",         "the rust linker")
 
     -- insert asm tools to toolchains
     if config.get("arch"):find("64") then
-        checker.toolchain_insert(toolchains, "as",   "",    "ml64.exe",         "the assember") 
+        checker.toolchain_insert(toolchains, "as", "", "ml64.exe", "the assember")
     else
-        checker.toolchain_insert(toolchains, "as",   "",    "ml.exe",           "the assember") 
+        checker.toolchain_insert(toolchains, "as", "", "ml.exe",   "the assember")
     end
 
     -- save toolchains