diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index b041a075..27dc22ed 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -430,6 +430,10 @@ config("compiler") {
     }
   }
 
+  cflags_c += string_split(getenv("CFLAGS"), " ")
+  cflags_cc += string_split(getenv("CXXFLAGS"), " ")
+  ldflags += string_split(getenv("LDFLAGS"), " ")
+
   # Assign any flags set for the C compiler to asmflags so that they are sent
   # to the assembler. The Windows assembler takes different types of flags
   # so only do so for posix platforms.