[m-dev.] diff: fix uses of AC_ARG_ENABLE

[Fergus Henderson]

Estimated hours taken: 0.5

configure.in:
	Fix a couple of bugs relating to the use of AC_ARG_ENABLE:
	the action in the third argument of AC_ARG_ENABLE is invoked
	even when the option passed on the command line is `--disable-foo',
	and so configure.in needs to set the option to `$enableval' 
	which may be either "yes" or "no") rather than unconditionally
	setting it to "yes".

Workspace: /home/mercury0/fjh/mercury-other
Index: configure.in
===================================================================
RCS file: /home/mercury1/repository/mercury/configure.in,v
retrieving revision 1.166
diff -u -r1.166 configure.in
--- configure.in	1999/05/22 02:16:42	1.166
+++ configure.in	1999/05/22 02:28:20
@@ -1517,9 +1517,9 @@
 
 AC_ARG_ENABLE(all-grades,
 [  --enable-all-grades     install all the different versions of the library],
-enable_all_grades=yes,enable_all_grades=no)
+enable_all_grades="$enableval",enable_all_grades=no)
 
-if test $enable_all_grades = yes; then
+if test "$enable_all_grades" = yes; then
 	LIBGRADES="$ALL_LIBGRADES"
 else
 	LIBGRADES="$BEST_GRADE"
@@ -1544,7 +1544,7 @@
 
 # add `.tr' (--trailing) grades
 LIBGRADES="$LIBGRADES $DEFAULT_GRADE.tr"
-if test $enable_all_grades = yes; then
+if test "$enable_all_grades" = yes; then
 	DEFAULT_GRADE_NOGC="`echo $DEFAULT_GRADE | sed 's/\.gc$//'`"
 	LIBGRADES="$LIBGRADES $DEFAULT_GRADE_NOGC.tr"
 	if test $mercury_cv_profiling = yes; then
@@ -1566,8 +1566,8 @@
 #
 AC_ARG_ENABLE(decl-debug,
 [  --enable-decl-debug     enable the declarative debugger],
-mercury_cv_enable_decl_debug=yes,mercury_cv_enable_decl_debug=no)
-if test $mercury_cv_enable_decl_debug = "yes"; then
+mercury_cv_enable_decl_debug="$enableval",mercury_cv_enable_decl_debug=no)
+if test "$mercury_cv_enable_decl_debug" = "yes"; then
 	AC_DEFINE(MR_USE_DECLARATIVE_DEBUGGER)
 fi
 #-----------------------------------------------------------------------------#

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
PGP: finger fjh at 128.250.37.3        |     -- the last words of T. S. Garp.
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