Folding build_tools back into the main repo for simplicity.

third_party/gflags.lua

@@ -0,0 +1,41 @@
+group("third_party")
+project("gflags")
+  uuid("e319da87-75ed-4517-8f65-bd25e9cc02a3")
+  kind("StaticLib")
+  language("C++")
+
+  -- These win32-specific overrides must come before others.
+  filter("platforms:Windows")
+    defines({
+      "PATH_SEPARATOR=%%27\\\\%%27",
+    })
+    includedirs({
+      "gflags/src/windows",
+    })
+  filter({})
+
+  defines({
+    "GFLAGS_DLL_DECL=",
+    "GFLAGS_DLL_DEFINE_FLAG=",
+    "GFLAGS_DLL_DECLARE_FLAG=",
+    "_LIB",
+  })
+  includedirs({
+    "gflags/src",
+  })
+  files({
+    "gflags/src/gflags.cc",
+    "gflags/src/gflags_completions.cc",
+    "gflags/src/gflags_reporting.cc",
+    "gflags/src/mutex.h",
+    "gflags/src/util.h",
+  })
+  filter("platforms:Windows")
+    files({
+      "gflags/src/windows/config.h",
+      "gflags/src/windows/gflags/gflags.h",
+      "gflags/src/windows/gflags/gflags_completions.h",
+      "gflags/src/windows/gflags/gflags_declare.h",
+      "gflags/src/windows/port.cc",
+      "gflags/src/windows/port.h",
+    })