From dfced56c57e34e0109fb8614430ed77504490ddd Mon Sep 17 00:00:00 2001
From: Vladislav Shchapov <vladislav@shchapov.ru>
Date: Thu, 21 Dec 2023 21:19:34 +0500
Subject: [PATCH] Remove unused Z_TLS and HAVE_THREAD_LOCAL

Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>
---
 CMakeLists.txt | 15 ---------------
 configure      | 16 ----------------
 zbuild.h       | 14 --------------
 3 files changed, 45 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0cbc69a6..58ed3a1a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -427,21 +427,6 @@ if(HAVE_ATTRIBUTE_ALIGNED)
     add_definitions(-DHAVE_ATTRIBUTE_ALIGNED)
 endif()
 
-#
-# check for _Thread_local() support in the compiler
-#
-check_c_source_compiles(
-    "_Thread_local int test;
-    int main(void) {
-        (void)test;
-        return 0;
-    }"
-    HAVE_THREAD_LOCAL
-)
-if(HAVE_THREAD_LOCAL)
-    add_definitions(-DHAVE_THREAD_LOCAL)
-endif()
-
 #
 # check for __builtin_ctz() support in the compiler
 #
diff --git a/configure b/configure
index 501f51ba..e0187be0 100755
--- a/configure
+++ b/configure
@@ -973,22 +973,6 @@ else
     echo "Checking for attribute(aligned) ... No." | tee -a configure.log
 fi
 
-# Check for _Thread_local support in compiler
-cat > $test.c << EOF
-_Thread_local int test;
-int main(void) {
-    (void)test;
-    return 0;
-}
-EOF
-if try ${CC} ${CFLAGS} $test.c $LDSHAREDLIBC; then
-    echo "Checking for _Thread_local ... Yes." | tee -a configure.log
-    CFLAGS="$CFLAGS -DHAVE_THREAD_LOCAL"
-    SFLAGS="$SFLAGS -DHAVE_THREAD_LOCAL"
-else
-    echo "Checking for _Thread_local ... No." | tee -a configure.log
-fi
-
 # Check for __builtin_ctz() support in compiler
 cat > $test.c << EOF
 long f(unsigned int x) { return __builtin_ctz(x); }
diff --git a/zbuild.h b/zbuild.h
index d78c3a15..d550b4c5 100644
--- a/zbuild.h
+++ b/zbuild.h
@@ -31,20 +31,6 @@
 #  endif
 #endif
 
-/* Determine compiler support for TLS */
-#ifndef Z_TLS
-#  ifdef HAVE_THREAD_LOCAL
-#    define Z_TLS _Thread_local
-#  elif defined(__GNUC__) || defined(__SUNPRO_C)
-#    define Z_TLS __thread
-#  elif defined(_WIN32) && (defined(_MSC_VER) || defined(__ICL))
-#    define Z_TLS __declspec(thread)
-#  else
-#    warning Unable to detect Thread Local Storage support.
-#    define Z_TLS
-#  endif
-#endif
-
 #ifndef Z_HAS_ATTRIBUTE
 #  if defined(__has_attribute)
 #    define Z_HAS_ATTRIBUTE(a) __has_attribute(a)
-- 
2.47.2