From d97676c40363b112b0d4ef70d7af2da6876b8177 Mon Sep 17 00:00:00 2001
From: eschnett <eschnett@4054007a-4839-4648-a056-eb81e030d849>
Date: Fri, 15 Jun 2012 19:14:27 +0000
Subject: Autodetect OpenCL libraries

git-svn-id: http://svn.cactuscode.org/projects/ExternalLibraries/OpenCL/trunk@16 4054007a-4839-4648-a056-eb81e030d849
---
 configure.sh | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 52 insertions(+), 9 deletions(-)

diff --git a/configure.sh b/configure.sh
index 86f564b..332639a 100644
--- a/configure.sh
+++ b/configure.sh
@@ -5,7 +5,9 @@
 ################################################################################
 
 # Set up shell
-set -x                          # Output commands
+if [ "$(echo ${VERBOSE} | tr '[:upper:]' '[:lower:]')" = 'yes' ]; then
+    set -x                      # Output commands
+fi
 set -e                          # Abort on errors
 
 
@@ -15,25 +17,66 @@ set -e                          # Abort on errors
 ################################################################################
 
 if [ -z "${OPENCL_DIR}" ]; then
+    echo "BEGIN MESSAGE"
+    echo "OpenCL selected, but OPENCL_DIR not set. Checking some places..."
+    echo "END MESSAGE"
+
+    DIRS="/usr /usr/local /opt/local /usr/local/packages usr/local/apps /opt/local ${HOME} c:/packages/"
+    # look into each directory
+    for dir in $DIRS; do
+        # libraries might have different file extensions
+        for libext in a so dylib; do
+            # libraries can be in /lib or /lib64
+            for libdir in lib64 lib; do
+                FILES="$libdir/libOpenCL.${libext}"
+                # assume this is the one and check all needed files
+                OPENCL_DIR="$dir"
+                for file in $FILES; do
+                    # discard this directory if one file was not found
+                    if [ ! -r "$dir/$file" ]; then
+                        unset OPENCL_DIR
+                        break
+                    fi
+                done
+                # don't look further if all files have been found
+                if [ -n "$OPENCL_DIR" ]; then
+                    break
+                fi
+            done
+           # don't look further if all files have been found
+            if [ -n "$OPENCL_DIR" ]; then
+                break
+            fi
+        done
+        # don't look further if all files have been found
+        if [ -n "$OPENCL_DIR" ]; then
+            break
+        fi
+    done
+    
+    # Prefer the system OpenCL on Mac OSX
     if [ -r /System/Library/Frameworks/OpenCL.framework ]; then
         OPENCL_DIR=/System/Library/Frameworks/OpenCL.framework
         OPENCL_INC_DIRS=/System/Library/Frameworks/OpenCL.framework/Headers
         OPENCL_LIB_DIRS=/System/Library/Frameworks/OpenCL.framework/Libraries
         OPENCL_LIBS="-Wl,-framework -Wl,OpenCL"
-    else
-        echo "BEGIN ERROR"
-        echo "OpenCL selected, but OPENCL_DIR not set."
-        echo "END ERROR"
-        exit 1
     fi
 fi
 
-# Set options
 
-: ${OPENCL_INC_DIRS:=${OPENCL_DIR}/include}
-: ${OPENCL_LIB_DIRS:=${OPENCL_DIR}/lib}
+
+################################################################################
+# Configure Cactus
+################################################################################
+
+# Set options
+if [ "${OPENCL_DIR}" != '/usr' -a "${OPENCL_DIR}" != '/usr/local' ]; then
+    : ${OPENCL_INC_DIRS:=${OPENCL_DIR}/include}
+    : ${OPENCL_LIB_DIRS:=${OPENCL_DIR}/lib}
+fi
 : ${OPENCL_LIBS:=OpenCL}
 
+# Pass options to Cactus
 echo "BEGIN MAKE_DEFINITION"
 echo "HAVE_OPENCL     = 1"
 echo "OPENCL_DIR      = ${OPENCL_DIR}"
-- 
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