Fixing ant-bootstrap / jamvm segfault (i686)

[Ricardo Wurmus]

Hi Guix,

here’s a probably needlessly complicated patch to fix the build of
ant-bootstrap.  It currently fails to build because jamvm segfaults.

--8<---------------cut here---------------start------------->8---
diff --git a/gnu/packages/java.scm b/gnu/packages/java.scm
index 403c446a82..6bb4f8167f 100644
--- a/gnu/packages/java.scm
+++ b/gnu/packages/java.scm
@@ -186,10 +186,15 @@ language.")
     (arguments
      `(#:configure-flags
        (list (string-append "--with-classpath-install-dir="
-                            (assoc-ref %build-inputs "classpath")))))
+                            (assoc-ref %build-inputs "classpath"))
+             "--disable-int-caching"
+             "--enable-runtime-reloc-checks"
+             "--disable-int-inlining"
+             "--enable-ffi")))
     (inputs
      `(("classpath" ,classpath-bootstrap)
        ("jikes" ,jikes)
+       ("libffi" ,libffi)
        ("zlib" ,zlib)))
     (home-page "http://jamvm.sourceforge.net/";)
     (synopsis "Small Java Virtual Machine")
@@ -258,7 +263,7 @@ JNI.")
                 ,@(if (string-prefix? "armhf" (or (%current-system)
                                                   (%current-target-system)))
                       `((string-append m "-Xnocompact "))
-                      `((string-append m "-Xnocompact -Xnoinlining ")))))
+                      `((string-append m "-Xnocompact ")))))

              ;; Disable tests because we are bootstrapping and thus don't have
              ;; any of the dependencies required to build and run the tests.
--8<---------------cut here---------------end--------------->8---

I’m almost certain that not all of these configure flags are needed.
What do you think?  Would someone like to play a little with this patch
and see if we can figure out why exactly jamvm segfaults?

I used this command to build ant-bootstrap:

    ./pre-inst-env guix build -K --system=i686-linux -e '(@@ (gnu packages 
java) ant-bootstrap)'

--
Ricardo