From 00aaf8e6f45fed0e4a1dcce9de230826009e0b39 Mon Sep 17 00:00:00 2001
From: Allen Byrne <byrn@hdfgroup.org>
Date: Mon, 26 Oct 2015 15:09:22 -0500
Subject: [svn-r28228] Remove WIN32 only config of threadsafe

---
 CMakeLists.txt     | 93 +++++++++++++++++++++++++++---------------------------
 src/CMakeLists.txt |  1 +
 2 files changed, 48 insertions(+), 46 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 33c8ddf..65124ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -535,53 +535,54 @@ if (NOT HDF5_EXTERNALLY_CONFIGURED)
 endif (NOT HDF5_EXTERNALLY_CONFIGURED)
 #-----------------------------------------------------------------------------
 # Option to use threadsafe
-# Note: Currently CMake only allows configuring of threadsafe on
-# non-Cygwin WINDOWS.
 #-----------------------------------------------------------------------------
-if (WIN32)
-  option (HDF5_ENABLE_THREADSAFE "Enable thread-safety" OFF)
-  if (HDF5_ENABLE_THREADSAFE)
-    # check for unsupported options
-    message (STATUS " **** thread-safety option not supported with static library **** ")
-    message (STATUS " **** thread-safety option will not be used building static library **** ")
-    if (HDF5_ENABLE_PARALLEL)
-      if (NOT ALLOW_UNSUPPORTED)
-        message (FATAL_ERROR " **** parallel and thread-safety options are not supported **** ")
-      else (NOT ALLOW_UNSUPPORTED)
-        message (STATUS " **** Allowing unsupported parallel and thread-safety options **** ")
-      endif (NOT ALLOW_UNSUPPORTED)
-    endif (HDF5_ENABLE_PARALLEL)
-    if (HDF5_BUILD_FORTRAN)
-      if (NOT ALLOW_UNSUPPORTED)
-        message (FATAL_ERROR " **** Fortran and thread-safety options are not supported **** ")
-      else (NOT ALLOW_UNSUPPORTED)
-        message (STATUS " **** Allowing unsupported Fortran and thread-safety options **** ")
-      endif (NOT ALLOW_UNSUPPORTED)
-    endif (HDF5_BUILD_FORTRAN)
-    if (HDF5_BUILD_CPP_LIB)
-      if (NOT ALLOW_UNSUPPORTED)
-        message (FATAL_ERROR " **** C++ and thread-safety options are not supported **** ")
-      else (NOT ALLOW_UNSUPPORTED)
-        message (STATUS " **** Allowing unsupported C++ and thread-safety options **** ")
-      endif (NOT ALLOW_UNSUPPORTED)
-    endif (HDF5_BUILD_CPP_LIB)
-    if (HDF5_BUILD_HL_LIB)
-      if (NOT ALLOW_UNSUPPORTED)
-        message (FATAL_ERROR " **** HL and thread-safety options are not supported **** ")
-      else (NOT ALLOW_UNSUPPORTED)
-        message (STATUS " **** Allowing unsupported HL and thread-safety options **** ")
-      endif (NOT ALLOW_UNSUPPORTED)
-    endif (HDF5_BUILD_HL_LIB)
-    if (H5_HAVE_IOEO)
-      message (STATUS " **** Win32 threads requires WINVER>=0x600 (Windows Vista/7/8) **** ")
-      set (H5_HAVE_WIN_THREADS 1)
-    else (H5_HAVE_IOEO)
-      if (NOT H5_HAVE_PTHREAD_H)
-        message (FATAL_ERROR " **** thread-safe option requires Win32 threads or Pthreads **** ")
-      endif (NOT H5_HAVE_PTHREAD_H)
-    endif (H5_HAVE_IOEO)
-  endif (HDF5_ENABLE_THREADSAFE)
-endif (WIN32)
+option (HDF5_ENABLE_THREADSAFE "Enable thread-safety" OFF)
+if (HDF5_ENABLE_THREADSAFE)
+  # check for unsupported options
+  message (STATUS " **** thread-safety option not supported with static library **** ")
+  message (STATUS " **** thread-safety option will not be used building static library **** ")
+  if (HDF5_ENABLE_PARALLEL)
+    if (NOT ALLOW_UNSUPPORTED)
+      message (FATAL_ERROR " **** parallel and thread-safety options are not supported **** ")
+    else (NOT ALLOW_UNSUPPORTED)
+      message (STATUS " **** Allowing unsupported parallel and thread-safety options **** ")
+    endif (NOT ALLOW_UNSUPPORTED)
+  endif (HDF5_ENABLE_PARALLEL)
+  if (HDF5_BUILD_FORTRAN)
+    if (NOT ALLOW_UNSUPPORTED)
+      message (FATAL_ERROR " **** Fortran and thread-safety options are not supported **** ")
+    else (NOT ALLOW_UNSUPPORTED)
+      message (STATUS " **** Allowing unsupported Fortran and thread-safety options **** ")
+    endif (NOT ALLOW_UNSUPPORTED)
+  endif (HDF5_BUILD_FORTRAN)
+  if (HDF5_BUILD_CPP_LIB)
+    if (NOT ALLOW_UNSUPPORTED)
+      message (FATAL_ERROR " **** C++ and thread-safety options are not supported **** ")
+    else (NOT ALLOW_UNSUPPORTED)
+      message (STATUS " **** Allowing unsupported C++ and thread-safety options **** ")
+    endif (NOT ALLOW_UNSUPPORTED)
+  endif (HDF5_BUILD_CPP_LIB)
+  if (HDF5_BUILD_HL_LIB)
+    if (NOT ALLOW_UNSUPPORTED)
+      message (FATAL_ERROR " **** HL and thread-safety options are not supported **** ")
+    else (NOT ALLOW_UNSUPPORTED)
+      message (STATUS " **** Allowing unsupported HL and thread-safety options **** ")
+    endif (NOT ALLOW_UNSUPPORTED)
+  endif (HDF5_BUILD_HL_LIB)
+  if (H5_HAVE_IOEO)
+    message (STATUS " **** Win32 threads requires WINVER>=0x600 (Windows Vista/7/8) **** ")
+    set (H5_HAVE_WIN_THREADS 1)
+  else (H5_HAVE_IOEO)
+    if (NOT H5_HAVE_PTHREAD_H)
+      message (FATAL_ERROR " **** thread-safe option requires Win32 threads or Pthreads **** ")
+    endif (NOT H5_HAVE_PTHREAD_H)
+  endif (H5_HAVE_IOEO)
+  set(THREADS_PREFER_PTHREAD_FLAG ON)
+  find_package(Threads)
+  if (NOT Threads_FOUND)
+    message (STATUS " **** thread-safe package not found - threads still might work **** ")
+  endif (NOT Threads_FOUND)
+endif (HDF5_ENABLE_THREADSAFE)
 
 # -----------------------------------------------------------------------
 # wrapper script variables
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index cf218d7..b7656a1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -887,6 +887,7 @@ if (BUILD_SHARED_LIBS)
         APPEND PROPERTY COMPILE_DEFINITIONS
             "H5_HAVE_THREADSAFE"
     )
+    target_link_libraries (${HDF5_LIBSH_TARGET} Threads::Threads)
   endif (HDF5_ENABLE_THREADSAFE)
 
   if (HDF5_ENABLE_DEBUG_APIS)
-- 
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