Use configure ARG_MAX hack by default.

Details:
- Use --enable-max-arg-list-hack in configure by default. Thanks to
  M. Zhou,  Stefano Ferraro, and others for reporting that the need for
  this option is becoming increasingly commonplace.

build/ac-macros/fla_check_enable_max_arg_list_hack.m4

@@ -7,7 +7,7 @@ AC_DEFUN([FLA_CHECK_ENABLE_MAX_ARG_LIST_HACK],
 	dnl --disable-<option>. If so, then run the first snippet of code;
 	dnl otherwise, run the second code block.
 	AC_ARG_ENABLE([max-arg-list-hack],
-	              AC_HELP_STRING([--enable-max-arg-list-hack],[Enable makefile code that archives object files from a flat object directory, thus decreasing the potential length of the argument list to ar. Use this option if you get 'Argument list too long' error messages when make tries to archive the library. (Disabled by default.)]),
+	              AC_HELP_STRING([--enable-max-arg-list-hack],[Enable makefile code that archives object files from a flat object directory, thus decreasing the potential length of the argument list to ar. Use this option if you get 'Argument list too long' error messages when make tries to archive the library. (Enabled by default.)]),
 	[
 		dnl If any form of the option is given, handle each case.
 		if test "$enableval" = "no" ; then
@@ -29,8 +29,8 @@ AC_DEFUN([FLA_CHECK_ENABLE_MAX_ARG_LIST_HACK],
 	],
 	[
 		dnl User did not specify whether to enable or disable the option.
-		dnl Default behavior is to disable the option.
-		fla_enable_max_arg_list_hack=no
+		dnl Default behavior is to enable the option.
+		fla_enable_max_arg_list_hack=yes
 	]
 	)
 	

configure

@@ -1469,7 +1469,7 @@ Optional Features:
                           potential length of the argument list to ar. Use
                           this option if you get 'Argument list too long'
                           error messages when make tries to archive the
-                          library. (Disabled by default.)
+                          library. (Enabled by default.)
   --enable-non-critical-code
                           Enable code that provides non-critical
                           functionality. This code has been identified as
@@ -6014,7 +6014,7 @@ if test "${enable_max_arg_list_hack+set}" = set; then :
 
 else
 
-						fla_enable_max_arg_list_hack=no
+						fla_enable_max_arg_list_hack=yes
 
 
 fi
@@ -6508,7 +6508,7 @@ $as_echo_n "checking for (guessing) OpenMP flags for ${CC_VENDOR}... " >&6; }
 
 		case ${CC_VENDOR} in
 				icc)
-			fla_c_openmp_flags='-qopenmp'
+			fla_c_openmp_flags='-openmp'
 		;;
 				gcc)
 			fla_c_openmp_flags='-fopenmp'