Take advantage of natdynlink when available: almost all contribs become loadable plugins

- Any contrib foo leads to contrib/foo/foo_plugin.cmxs (and .cma for bytecode).
- Features that were available without any Require are now loaded systematically
  when launching coqtop (see Coqtop.load_initial_plugins):
     extraction, jprover, cc, ground, dp, recdef, xml
- The other plugins are loaded when a corresponding Require is done:
     quote, ring, field, setoid_ring, omega, romega, micromega, fourier
- I experienced a crash (segfault) while turning subtac into a plugin, so this
  one stays statically linked into coqtop for now
- When the ocaml version doesn't support natdynlink, or if "-natdynlink no"
  is explicitely given to configure, coqtop is statically linked with all of
  the above code as usual. Some messages [Ignore ML file Foo_plugin] may appear.
- How should coqdep handle a "Declare ML Module "foo"" if foo is an archive
  and not a ml file ? For now, we suppose that the foo.{cmxs,cma} are at the
  same location as the .v during the build, but can be moved later in any place of
  the ml loadpath.

This is clearly an experimentation. Feedback most welcome...

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@11687 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 10 insertions, 2 deletions

diff --git a/configure b/configure
index a64f561481..b9e6f9ea8f 100755
--- a/configure
+++ b/configure
@@ -59,6 +59,8 @@ usage () {
     printf "\tSpecifies the architecture\n"
     echo "-opt"
     printf "\tSpecifies whether or not to generate optimized executables\n"
+    echo "-natdynlink (yes|no)"
+    printf "\tSpecifies whether or not to use dynamic loading of native code\n"
     echo "-fsets (all|basic)"
     echo "-reals (all|basic)"
     printf "\tSpecifies whether or not to compile full FSets/Reals library\n"
@@ -104,6 +106,7 @@ coq_profile_flag=
 coq_annotate_flag=
 best_compiler=opt
 cflags="-fno-defer-pop -Wall -Wno-unused"
+natdynlink=yes
 
 gcc_exec=gcc
 ar_exec=ar
@@ -186,6 +189,11 @@ while : ; do
     -opt|--opt) bytecamlc=ocamlc.opt
                 camlp4oexec=camlp4o  # can't add .opt since dyn load'll be required
                 nativecamlc=ocamlopt.opt;;
+    -natdynlink|--natdynlink) case "$2" in
+	                  yes) natdynlink=yes;;
+                          *) natdynlink=no
+                        esac
+                        shift;;
     -fsets|--fsets) case "$2" in
 			yes|all) fsets=all;;
 			*) fsets=basic
@@ -212,7 +220,7 @@ while : ; do
 		      esac
 		      shift;;
     -with-geoproof|--with-geoproof) 
-	  case $2 in
+	  case "$2" in
 	      yes) with_geoproof=true;;
 	      no) with_geoproof=false;;
 	  esac
@@ -442,7 +450,7 @@ if [ "$coq_debug_flag" = "-g" ]; then
 fi
 
 # Native dynlink
-if test -f `"$CAMLC" -where`/dynlink.cmxa; then
+if [ "$natdynlink" = "yes" -a -f `"$CAMLC" -where`/dynlink.cmxa ]; then
     HASNATDYNLINK=true
 else
     HASNATDYNLINK=false