berkeley-db: Correct TLS auto-detection (#32592)

var/spack/repos/builtin/packages/berkeley-db/package.py

@@ -39,6 +39,11 @@ class BerkeleyDb(AutotoolsPackage):
     build_directory = "build_unix"
 
     patch("drop-docs.patch", when="~docs")
+    # Correct autoconf macro to detect TLS support.
+    # Patch developed by @eschnett. There is no upstream issue because
+    # Oracle's web site does not have instructions for submitting such
+    # an issue or pull request.
+    patch("tls.patch")
 
     conflicts("%clang@7:", when="@5.3.28")
     conflicts("%gcc@8:", when="@5.3.28")

var/spack/repos/builtin/packages/berkeley-db/tls.patch

@@ -0,0 +1,24 @@
+--- a/dist/aclocal/tls.m4
++++ b/dist/aclocal/tls.m4
+@@ -15,7 +15,8 @@
+       for ax_tls_defn_keyword in $ax_tls_keywords ""; do
+           test -z "$ax_tls_decl_keyword" &&
+               test -z "$ax_tls_defn_keyword" && continue
+-          AC_TRY_COMPILE([template <typename T>class TLSClass {
++          AC_TRY_COMPILE([#include <stdlib.h>
++              template <typename T>class TLSClass {
+               public: static ] $ax_tls_decl_keyword [ T *tlsvar;
+               };
+               class TLSClass2 {
+--- a/dist/configure
++++ b/dist/configure
+@@ -19044,7 +19044,8 @@
+               test -z "$ax_tls_defn_keyword" && continue
+           cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+ /* end confdefs.h.  */
+-template <typename T>class TLSClass {
++#include <stdlib.h>
++              template <typename T>class TLSClass {
+               public: static  $ax_tls_decl_keyword  T *tlsvar;
+               };
+               class TLSClass2 {