Merge pull request #1742 from martin-frbg/interim033

Add combination of old and new thread memory code selectable by new option USE_TLS

Makefile.rule

@@ -107,7 +107,13 @@ BUILD_LAPACK_DEPRECATED = 1
 # BUILD_RELAPACK = 1
 
 # If you want to use legacy threaded Level 3 implementation.
-# USE_SIMPLE_THREADED_LEVEL3 = 1
+USE_SIMPLE_THREADED_LEVEL3 = 1
+
+# If you want to use the new, still somewhat experimental code that uses
+# thread-local storage instead of a central memory buffer in memory.c
+# Note that if your system uses GLIBC, it needs to have at least glibc 2.21
+# for this to work.
+USE_TLS = 1
 
 # If you want to drive whole 64bit region by BLAS. Not all Fortran
 # compiler supports this. It's safe to keep comment it out if you

Makefile.system

@@ -1018,6 +1018,10 @@ ifdef USE_SIMPLE_THREADED_LEVEL3
 CCOMMON_OPT	+= -DUSE_SIMPLE_THREADED_LEVEL3
 endif
 
+ifdef USE_TLS
+CCOMMON_OPT += -DUSE_TLS
+endif
+
 ifndef SYMBOLPREFIX
 SYMBOLPREFIX =
 endif

cmake/system.cmake

@@ -214,6 +214,10 @@ if (CONSISTENT_FPCSR)
   set(CCOMMON_OPT "${CCOMMON_OPT} -DCONSISTENT_FPCSR")
 endif ()
 
+if (USE_TLS)
+  set(CCOMMON_OPT "${CCOMMON_OPT} -DUSE_TLS")
+endif ()
+
 # Only for development
 # set(CCOMMON_OPT "${CCOMMON_OPT} -DPARAMTEST")
 # set(CCOMMON_OPT "${CCOMMON_OPT} -DPREFETCHTEST")