improve syntax check

1 files changed, 12 insertions, 0 deletions

diff --git a/xmake/modules/core/tools/gcc.lua b/xmake/modules/core/tools/gcc.lua
index 4a920a233..c1a98b752 100644
--- a/xmake/modules/core/tools/gcc.lua
+++ b/xmake/modules/core/tools/gcc.lua
@@ -73,6 +73,11 @@ function _is_cosmocc(self)
     return is_cosmocc
 end
 
+-- is syntax check enabled?
+function _is_syntax_check()
+    return memcache.get("syntax_check", "enabled") or false
+end
+
 -- get `-MMD -MF depfile.d` flags, some old gcc does not support it at same time
 function _get_depfile_flags(self)
     local depfile_flags = _g._DEPFILE_FLAGS
@@ -965,6 +970,7 @@ end
 
 -- make the compile arguments list
 function compargv(self, sourcefile, objectfile, flags, opt)
+    opt = opt or {}
 
     -- is precompiled header or module files? remove the force includes.
     local extension = path.extension(sourcefile)
@@ -974,6 +980,12 @@ function compargv(self, sourcefile, objectfile, flags, opt)
         flags = _translate_flags_for_mpp(self, flags)
     end
 
+    -- if syntax-only, add -fsyntax-only and skip -c and -o
+    if _is_syntax_check() then
+        table.insert(flags, "-fsyntax-only")
+        return self:program(), table.join(flags, sourcefile)
+    end
+
     local argv = table.join("-c", flags, "-o", objectfile, sourcefile)
     return self:program(), argv
 end