main: receive blob handler path from configure

Add blob handler path to configure_ac and use this
path for searching.

Change-Id: Ie0e33e93822bc6e95ace2fed5abe66f42dae5ca5
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index 325cc0e..667b88c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,6 +56,10 @@
     AC_SUBST([OESDK_TESTCASE_FLAGS], [$testcase_flags])
 )
 
+AC_ARG_VAR(BLOB_LIB_PATH, [The file path to search for libraries.])
+AS_IF([test "x$BLOB_LIB_PATH" == "x"], [BLOB_LIB_PATH="/usr/lib/blob-ipmid"])
+AC_DEFINE_UNQUOTED([BLOB_LIB_PATH], ["$BLOB_LIB_PATH"], [The file path to search for libraries.])
+
 # Create configured output
 AC_CONFIG_FILES([Makefile test/Makefile])
 AC_OUTPUT
diff --git a/main.cpp b/main.cpp
index ee236d9..7bbae28 100644
--- a/main.cpp
+++ b/main.cpp
@@ -60,9 +60,6 @@
                               replyCmdBuf, dataLen);
 }
 
-/* TODO: this should come from the makefile or recipe... */
-constexpr auto expectedHandlerPath = "/usr/lib/blob-ipmid";
-
 void setupBlobGlobalHandler() __attribute__((constructor));
 
 void setupBlobGlobalHandler()
@@ -78,7 +75,7 @@
     /* Install handlers. */
     try
     {
-        loadLibraries(getBlobManager(), expectedHandlerPath);
+        loadLibraries(getBlobManager(), BLOB_LIB_PATH);
     }
     catch (const std::exception& e)
     {