improve to find gcc/clang

Author: waruqi

xmake/core/sandbox/modules/import/lib/detect/find_program.lua

@@ -43,6 +43,8 @@ function sandbox_lib_detect_find_program._do_check(program, opt)
     -- do not attempt to run program? check it fastly
     if opt.norun then
         return os.isfile(program)
+    elseif opt.norunfile and path.is_absolute(program) and os.isfile(program) then
+        return true
     end
 
     -- no check script? attempt to run it directly
@@ -295,6 +297,7 @@ end
 --                    - opt.paths     the program paths (e.g. dirs, paths, winreg paths, script paths)
 --                    - opt.check     the check script or command
 --                    - opt.norun     do not attempt to run program to check program fastly
+--                    - opt.norunfile do not attempt to run program to check program if it's valid file path.
 --                    - opt.system    true: only find it from system, false: only find it from xmake/packages
 --
 -- @return          the program name or path

xmake/modules/detect/tools/find_clang.lua

@@ -37,6 +37,7 @@ import("lib.detect.find_programver")
 --
 function main(opt)
     opt = opt or {}
+    opt.norunfile = true
     local program = find_program(opt.program or "clang", opt)
     local version = nil
     if program and opt and opt.version then

xmake/modules/detect/tools/find_clangxx.lua

@@ -37,6 +37,7 @@ import("lib.detect.find_programver")
 --
 function main(opt)
     opt = opt or {}
+    opt.norunfile = true
     local program = find_program(opt.program or "clang++", opt)
     local version = nil
     if program and opt and opt.version then

xmake/modules/detect/tools/find_gcc.lua

@@ -53,6 +53,7 @@ end
 --
 function main(opt)
     opt = opt or {}
+    opt.norunfile = true
     local program = find_program(opt.program or "gcc", opt)
     local version = nil
     if program and opt.version then

xmake/modules/detect/tools/find_gxx.lua

@@ -37,8 +37,8 @@ import("detect.tools.find_gcc")
 -- @endcode
 --
 function main(opt)
-
     opt = opt or {}
+    opt.norunfile = true
     local program = find_program(opt.program or "g++", opt)
     local version = nil
     if program and opt and opt.version then