Due to problems with detecting support for __thread, this flag becomes deactivated by default.

src/CHANGELOG

@@ -10,6 +10,12 @@ ECL 9.8.4:
 
  - The sequence functions did not understand the newest specialized array types.
 
+* Visible changes:
+
+ - The configuration flag --with-__thread now defaults to NO because many
+   platforms do not support it and GCC does not complain, making reliable
+   detection impossible.
+
 ECL 9.8.3:
 ==========
 

src/configure

@@ -1482,7 +1482,7 @@ Optional Packages:
   --with-gmp-prefix=path  prefix for system GMP includes and libraries
   --with-gmp-incdir=path  path to system GMP includes (overrides prefix)
   --with-gmp-libdir=path  path to system GMP libraries (overrides prefix)
-  --with-__thread         Enable __thread thread-local variables (yes|no|AUTO)
+  --with-__thread         Enable __thread thread-local variables (yes|NO|auto)
                           (supported by NPTL-aware glibc and maybe Windows)
   --with-cxx              build ECL using C++ compiler (default=NO)
   --with-tcp              include socket interface (yes|builtin|no,
@@ -2135,7 +2135,7 @@ fi
 if test "${with___thread+set}" = set; then
   withval=$with___thread;
 else
-  with___thread=auto
+  with___thread=no
 fi
 
 

src/configure.in

@@ -102,9 +102,9 @@ AC_ARG_ENABLE(local-gmp,
 
 AC_ARG_WITH(__thread,
   AS_HELP_STRING( [--with-__thread],
-                  [Enable __thread thread-local variables (yes|no|AUTO)]
+                  [Enable __thread thread-local variables (yes|NO|auto)]
                   [(supported by NPTL-aware glibc and maybe Windows)] ),
-  [], [with___thread=auto])
+  [], [with___thread=no])
 
 AC_ARG_ENABLE(opcode8,
   AS_HELP_STRING( [--enable-opcode8],