add the configure logic to check for sem_open and sem_init.

Change the code to rely on HAVE_SEM_OPEN etc. instead of my internal macro.

ompi/mca/sharedfp/sm/configure.m4

@@ -0,0 +1,38 @@
+# -*- shell-script -*-
+#
+# Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
+#                         University Research and Technology
+#                         Corporation.  All rights reserved.
+# Copyright (c) 2004-2005 The University of Tennessee and The University
+#                         of Tennessee Research Foundation.  All rights
+#                         reserved.
+# Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
+#                         University of Stuttgart.  All rights reserved.
+# Copyright (c) 2004-2012 The Regents of the University of California.
+#                         All rights reserved.
+# Copyright (c) 2010-2014 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2008-2015 University of Houston. All rights reserved.
+# $COPYRIGHT$
+#
+# Additional copyrights may follow
+#
+# $HEADER$
+#
+
+# MCA_sharedfp_sm_CONFIG(action-if-can-compile,
+#                        [action-if-cant-compile])
+# ------------------------------------------------
+AC_DEFUN([MCA_ompi_sharedfp_sm_CONFIG],[
+    AC_CONFIG_FILES([ompi/mca/sharedfp/sm/Makefile])
+
+    sharedfp_sm_happy=no
+    AC_CHECK_HEADER([semaphore.h],
+                    [AC_CHECK_FUNCS([sem_open],[sharedfp_sm_happy=yes],[])])
+
+    AC_CHECK_HEADER([semaphore.h],
+        [AC_CHECK_FUNCS([sem_init],[sharedfp_sm_happy=yes],[])])
+	
+    AS_IF([test "$sharedfp_sm_happy" = "yes"],
+          [$1],
+          [$2])
+])dnl

ompi/mca/sharedfp/sm/sharedfp_sm_file_open.c

@@ -164,13 +164,13 @@ int mca_sharedfp_sm_file_open (struct ompi_communicator_t *comm,
     /* Initialize semaphore so that is shared between processes.           */
     /* the semaphore is shared by keeping it in the shared memory segment  */
 
-#ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
+#if defined(HAVE_SEM_OPEN)
-    if(sem_init(&sm_offset_ptr->mutex, 1, 1) != -1){
-#else
     sm_data->sem_name = (char*) malloc( sizeof(char) * (strlen(filename_basename)+32) );
     sprintf(sm_data->sem_name,"OMPIO_sharedfp_sem_%s",filename_basename);
 
     if( (sm_data->mutex = sem_open(sm_data->sem_name, O_CREAT, 0644, 1)) != SEM_FAILED ) {
+#elif defined(HAVE_SEM_INIT)
+    if(sem_init(&sm_offset_ptr->mutex, 1, 1) != -1){
 #endif
 	/*If opening was successful*/
 	/*Store the new file handle*/
@@ -184,14 +184,14 @@ int mca_sharedfp_sm_file_open (struct ompi_communicator_t *comm,
 	if(rank==0){
 	    MPI_Offset position=0;
 
-#ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
+#if defined(HAVE_SEM_OPEN)
-	    sem_wait(&sm_offset_ptr->mutex);
-	    sm_offset_ptr->offset=position;
-	    sem_post(&sm_offset_ptr->mutex);
-#else
 	    sem_wait(sm_data->mutex);
 	    sm_offset_ptr->offset=position;
 	    sem_post(sm_data->mutex);
+#elif defined(HAVE_SEM_INIT)
+	    sem_wait(&sm_offset_ptr->mutex);
+	    sm_offset_ptr->offset=position;
+	    sem_post(&sm_offset_ptr->mutex);
 #endif
 	}
     }else{
@@ -235,11 +235,11 @@ int mca_sharedfp_sm_file_close (mca_io_ompio_file_t *fh)
         /*Close sm handle*/
         if (file_data->sm_offset_ptr) {
             /* destroy semaphore */
-#ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
+#if defined(HAVE_SEM_OPEN)
-	    sem_destroy(&file_data->sm_offset_ptr->mutex);
-#else
  	    sem_unlink (file_data->sem_name);
  	    free (file_data->sem_name);
+#elif defined(HAVE_SEM_INIT)
+	    sem_destroy(&file_data->sm_offset_ptr->mutex);
 #endif
             /*Release the shared memory segment.*/
             munmap(file_data->sm_offset_ptr,sizeof(struct mca_sharedfp_sm_offset));

ompi/mca/sharedfp/sm/sharedfp_sm_request_position.c

@@ -48,10 +48,10 @@ int mca_sharedfp_sm_request_position(struct mca_sharedfp_base_data_t * sh,
 
     /* Aquire an exclusive lock */
 
-#ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
+#if defined(HAVE_SEM_OPEN)
-    sem_wait(&sm_offset_ptr->mutex);
-#else
     sem_wait(sm_data->mutex);
+#elif defined(HAVE_SEM_INIT)
+    sem_wait(&sm_offset_ptr->mutex);
 #endif
 
     if ( mca_sharedfp_sm_verbose ) {
@@ -74,10 +74,10 @@ int mca_sharedfp_sm_request_position(struct mca_sharedfp_base_data_t * sh,
 	printf("Releasing sm lock...rank=%d",rank);
     }
 
-#ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
+#if defined(HAVE_SEM_OPEN)
-    sem_post(&sm_offset_ptr->mutex);
-#else
     sem_post(sm_data->mutex);
+#elif defined(HAVE_SEM_INIT)
+    sem_post(&sm_offset_ptr->mutex);
 #endif
     if ( mca_sharedfp_sm_verbose ) {
 	printf("Released lock! released lock.for rank=%d\n",rank);

ompi/mca/sharedfp/sm/sharedfp_sm_seek.c

@@ -121,10 +121,10 @@ mca_sharedfp_sm_seek (mca_io_ompio_file_t *fh,
         /* Aquire an exclusive lock */
         sm_offset_ptr = sm_data->sm_offset_ptr;
 
-#ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
+#if defined(HAVE_SEM_OPEN)
-	sem_wait(&sm_offset_ptr->mutex);
-#else
 	sem_wait(sm_data->mutex);
+#elif defined(HAVE_SEM_INIT)
+	sem_wait(&sm_offset_ptr->mutex);
 #endif
 
 	if ( mca_sharedfp_sm_verbose ) {
@@ -134,10 +134,10 @@ mca_sharedfp_sm_seek (mca_io_ompio_file_t *fh,
 	if ( mca_sharedfp_sm_verbose ) {
 	    printf("sharedfp_sm_seek: Releasing sm lock...rank=%d",rank); fflush(stdout);
 	}
-#ifdef OMPIO_SHAREDFP_USE_UNNAMED_SEMAPHORES
+#if defined(HAVE_SEM_OPEN)
-    sem_post(&sm_offset_ptr->mutex);
-#else
     sem_post(sm_data->mutex);
+#elif defined(HAVE_SEM_INIT)
+    sem_post(&sm_offset_ptr->mutex);
 #endif
     }