From b961608c5eca7fd6f6cf7250e652656596def648 Mon Sep 17 00:00:00 2001
From: Uwe Schulzweida <uwe.schulzweida@mpimet.mpg.de>
Date: Thu, 2 Mar 2023 09:41:45 +0100
Subject: [PATCH] acx_options.m4: removed search for H5TS_mutex_lock (not used)

---
 m4/acx_options.m4 | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/m4/acx_options.m4 b/m4/acx_options.m4
index bd189fce0..9db3fe5a2 100644
--- a/m4/acx_options.m4
+++ b/m4/acx_options.m4
@@ -206,10 +206,6 @@ AS_IF([test "x$ENABLE_NC4SZLIB" = "xyes"],
       [AC_SEARCH_LIBS([nc_def_var_szip], [netcdf],
                [AC_DEFINE([HAVE_NC_DEF_VAR_SZIP],[1],[Define to 1 for NetCDF4 nc_def_var_szip support])],,)])
 
-AS_IF([test "x$ENABLE_NC4HDF5" = "xyes"],
-      [AC_SEARCH_LIBS([H5TS_mutex_lock], [netcdf],
-               [AC_DEFINE([HAVE_NC4HDF5_THREADSAFE],[1],[Define to 1 for NetCDF4/HDF5 threadsafe support])],,[-lhdf5])])
-
 AS_IF([test "x$ENABLE_NC4HDF5" = "xyes"],
       [AC_SEARCH_LIBS([H5get_libversion], [netcdf],
                [AC_DEFINE([HAVE_H5GET_LIBVERSION],[1],[Define to 1 for H5get_libversion support])],,[-lhdf5])])
-- 
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