diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
--- a/Lib/distutils/sysconfig.py
+++ b/Lib/distutils/sysconfig.py
@@ -329,6 +329,9 @@
                 except ValueError:
                     # insert literal `$'
                     done[n] = v.replace('$$', '$')
+                    if n == 'BASECFLAGS' and not python_build:
+                        print("BASECFLAGS", python_build)
+                        done[n] = done[n].replace('-Werror=declaration-after-statement', '')
                 else:
                     done[n] = v
 
diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
--- a/Lib/sysconfig.py
+++ b/Lib/sysconfig.py
@@ -252,6 +252,8 @@
                 except ValueError:
                     # insert literal `$'
                     done[n] = v.replace('$$', '$')
+                    if n == 'BASECFLAGS':
+                        done[n] = done[n].replace('-Werror=declaration-after-statement', '')
                 else:
                     done[n] = v