When building sqlite3, the directory where sqlite.h was found was

always appended to the include directories regardless of whether it
was already in the list of directories. This could cause issue if
sqlite was installed in the same location as another install of
Python. Now a check is done to make sure the directory is not included
twice.

1 files changed, 7 insertions, 2 deletions

diff --git a/setup.py b/setup.py
index 896d6046f0..39751c3b0a 100644
--- a/setup.py
+++ b/setup.py
@@ -1045,10 +1045,15 @@ class PyBuildExt(build_ext):
             else:
                 sqlite_extra_link_args = ()
 
+            include_dirs = ["Modules/_sqlite"]
+            # Only include the directory where sqlite was found if it does
+            # not already exist in set include directories, otherwise you
+            # can end up with a bad search path order.
+            if sqlite_incdir not in self.compiler.include_dirs:
+                include_dirs.append(sqlite_incdir)
             exts.append(Extension('_sqlite3', sqlite_srcs,
                                   define_macros=sqlite_defines,
-                                  include_dirs=["Modules/_sqlite",
-                                                sqlite_incdir],
+                                  include_dirs=include_dirs,
                                   library_dirs=sqlite_libdir,
                                   runtime_library_dirs=sqlite_libdir,
                                   extra_link_args=sqlite_extra_link_args,