From bab9f2f21b6b27563fe53ae30ba4bf05934ed6f9 Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@python.org>
Date: Mon, 1 Nov 2021 12:52:04 +0100
Subject: [PATCH] bpo-43158: Use configure values for building _uuid extension

Signed-off-by: Christian Heimes <christian@python.org>
---
 .../2021-11-01-12-51-46.bpo-43158.fghS6w.rst  |  2 +
 configure                                     | 69 +++++++++++++++++++
 configure.ac                                  |  7 +-
 pyconfig.h.in                                 |  3 +
 setup.py                                      | 12 ++--
 5 files changed, 86 insertions(+), 7 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Build/2021-11-01-12-51-46.bpo-43158.fghS6w.rst

--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2021-11-01-12-51-46.bpo-43158.fghS6w.rst
@@ -0,0 +1,2 @@
+``setup.py`` now uses values from configure script to build the ``_uuid``
+extension module. Configure now detects util-linux's ``libuuid``, too.
--- a/configure
+++ b/configure
@@ -10038,6 +10038,75 @@ $as_echo "no" >&6; }
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
+save_LIBS=$LIBS
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing uuid_generate_time_safe" >&5
+$as_echo_n "checking for library containing uuid_generate_time_safe... " >&6; }
+if ${ac_cv_search_uuid_generate_time_safe+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char uuid_generate_time_safe ();
+int
+main ()
+{
+return uuid_generate_time_safe ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' uuid; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_uuid_generate_time_safe=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_uuid_generate_time_safe+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_uuid_generate_time_safe+:} false; then :
+
+else
+  ac_cv_search_uuid_generate_time_safe=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_uuid_generate_time_safe" >&5
+$as_echo "$ac_cv_search_uuid_generate_time_safe" >&6; }
+ac_res=$ac_cv_search_uuid_generate_time_safe
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+
+$as_echo "#define HAVE_LIBUUID 1" >>confdefs.h
+,
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+
+LIBS=$save_LIBS
+
 # AIX provides support for RFC4122 (uuid) in libc.a starting with AIX 6.1 (anno 2007)
 # FreeBSD and OpenBSD provides support as well
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for uuid_create" >&5
--- a/configure.ac
+++ b/configure.ac
@@ -2859,8 +2859,13 @@ void *x = uuid_generate_time_safe
   [AC_MSG_RESULT(no)]
 )
 
+# check for libuuid from util-linux
+save_LIBS=$LIBS
+AC_CHECK_LIB([uuid], [uuid_generate_time])
+LIBS=$save_LIBS
+
 # AIX provides support for RFC4122 (uuid) in libc.a starting with AIX 6.1 (anno 2007)
-# FreeBSD and OpenBSD provides support as well
+# FreeBSD and OpenBSD provides support in libc as well.
 AC_MSG_CHECKING(for uuid_create)
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <uuid.h>]], [[
 #ifndef uuid_create
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -628,6 +628,9 @@
 /* Define to 1 if you have the <libutil.h> header file. */
 #undef HAVE_LIBUTIL_H
 
+/* Define you have libuuid. */
+#undef HAVE_LIBUUID
+
 /* Define if you have the 'link' function. */
 #undef HAVE_LINK
 
--- a/setup.py
+++ b/setup.py
@@ -1850,15 +1850,15 @@ class PyBuildExt(build_ext):
 
     def detect_uuid(self):
         # Build the _uuid module if possible
-        uuid_incs = find_file("uuid.h", self.inc_dirs, ["/usr/include/uuid"])
-        if uuid_incs is not None:
-            if self.compiler.find_library_file(self.lib_dirs, 'uuid'):
-                uuid_libs = ['uuid']
+        uuid_h = sysconfig.get_config_var("HAVE_UUID_H")
+        uuid_uuid_h = sysconfig.get_config_var("HAVE_UUID_UUID_H")
+        if uuid_h or uuid_uuid_h:
+            if sysconfig.get_config_var("HAVE_LIBUUID"):
+                uuid_libs = ["uuid"]
             else:
                 uuid_libs = []
             self.add(Extension('_uuid', ['_uuidmodule.c'],
-                               libraries=uuid_libs,
-                               include_dirs=uuid_incs))
+                               libraries=uuid_libs))
         else:
             self.missing.append('_uuid')