Add support for building ocaml on NetBSD/powerpc.

On NetBSD 8.x, there will be issues with shared library
support, due to missing support for ADDR16_LO, ADDR16_HI
and ADDR16_HA relocations, available in newer code.
There are however other issues, text relocations, and
apparent missing REL24 relocation support(?!?).

The testyield.ml test appears to not terminate, only two
of the 4(?) threads ever get any CPU time, so has to be killed
to complete the selftests.  Test result:

  2438 tests passed
   36 tests skipped
   12 tests failed
  108 tests not started (parent test skipped or failed)
    8 unexpected errors
  2602 tests considered

2 files changed, 37 insertions, 9 deletions

diff --git a/lang/ocaml/distinfo b/lang/ocaml/distinfo
index e2d37a59510..0e6a7fefa4d 100644
--- a/lang/ocaml/distinfo
+++ b/lang/ocaml/distinfo
@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.136 2020/05/23 20:33:51 rillig Exp $
+$NetBSD: distinfo,v 1.137 2020/12/01 23:16:44 he Exp $
 
 SHA1 (ocaml-4.09.1.tar.gz) = b4e7140e977c0fae5182074dd93b3c1b74f49ee7
 RMD160 (ocaml-4.09.1.tar.gz) = 377e956327bac18a37f9e77b2558e9474fd07481
@@ -9,7 +9,7 @@ SHA1 (patch-Makefile.common.in) = fbf3dc0614073ed5ac9b220211a837f69a4ffcaf
 SHA1 (patch-asmcomp_amd64_emit.mlp) = c2b90f50bc3c4bf9817916bdd455a8bfc03cb69b
 SHA1 (patch-asmrun_amd64.S) = d4c33cb14c107ed03bf6a3704bbfe7c2799a048e
 SHA1 (patch-check-linker-version_sh) = c90242556207242ac58499d7f42519a10aedcca4
-SHA1 (patch-configure) = 311b18383bcc88f2a67d83d4b0c6e35344bd2d0d
+SHA1 (patch-configure) = dafa708f7ad063612cb93fa1089d49a6059d1e9f
 SHA1 (patch-lex_Makefile) = 18d1b8272ffb3e3a58c26d8a2494aaae6942426a
 SHA1 (patch-man_Makefile) = b780c026aef5f7e6b22b142fce3ec87ef9d2ab22
 SHA1 (patch-ocamldoc_Makefile) = ca4997636f7a6a382bbcb7be365526e94be4534a
diff --git a/lang/ocaml/patches/patch-configure b/lang/ocaml/patches/patch-configure
index df92307895a..0302b9c7ac5 100644
--- a/lang/ocaml/patches/patch-configure
+++ b/lang/ocaml/patches/patch-configure
@@ -1,4 +1,4 @@
-$NetBSD: patch-configure,v 1.41 2020/01/14 19:53:35 jaapb Exp $
+$NetBSD: patch-configure,v 1.42 2020/12/01 23:16:44 he Exp $
 
 All kinds of OS-specific changes to configure
 Honor LDFLAGS.
@@ -9,7 +9,7 @@ Recognise SunOS as having shared libraries
 
 --- configure.orig	2019-09-11 14:40:30.000000000 +0000
 +++ configure
-@@ -13281,7 +13281,7 @@ sharedlib_cflags=''
+@@ -13306,7 +13306,7 @@ sharedlib_cflags=''
  mksharedlib='shared-libs-not-available'
  rpath=''
  mksharedlibrpath=''
@@ -18,7 +18,16 @@ Recognise SunOS as having shared libraries
  
  if test x"$enable_shared" != "xno"; then :
    case $host in #(
-@@ -13383,6 +13383,8 @@ if test x"$enable_shared" != "xno"; then
+@@ -13392,6 +13392,8 @@ if test x"$enable_shared" != "xno"; then
+     natdynlink=true ;; #(
+   i[3456]86-*-netbsd*) :
+     natdynlink=true ;; #(
++  powerpc-*-netbsd*) :
++    natdynlink=true ;; #(
+   x86_64-*-netbsd*) :
+     natdynlink=true ;; #(
+   i386-*-gnu0.3) :
+@@ -13408,6 +13410,8 @@ if test x"$enable_shared" != "xno"; then
      natdynlink=true ;; #(
    aarch64-*-freebsd*) :
      natdynlink=true ;; #(
@@ -27,7 +36,7 @@ Recognise SunOS as having shared libraries
    *) :
       ;;
  esac
-@@ -13434,6 +13436,8 @@ case $host in #(
+@@ -13459,6 +13463,8 @@ case $host in #(
      arch=i386; system=beos ;; #(
    i[3456]86-*-cygwin) :
      arch=i386; system=cygwin ;; #(
@@ -36,7 +45,16 @@ Recognise SunOS as having shared libraries
    i[3456]86-*-gnu*) :
      arch=i386; system=gnu ;; #(
    i[3456]86-*-mingw32) :
-@@ -13468,6 +13472,10 @@ fi; system=elf ;; #(
+@@ -13475,6 +13481,8 @@ case $host in #(
+ else
+   model=ppc
+ fi; system=elf ;; #(
++  powerpc-*-netbsd*) :
++    arch=power; model=ppc; system=netbsd ;; #(
+   s390x*-*-linux*) :
+     arch=s390x; model=z10; system=elf ;; #(
+   armv6*-*-linux-gnueabihf) :
+@@ -13493,6 +13501,10 @@ fi; system=elf ;; #(
      arch=arm; model=armv6; system=linux_eabi ;; #(
    armv6*-*-freebsd*) :
      arch=arm; model=armv6; system=freebsd ;; #(
@@ -47,7 +65,7 @@ Recognise SunOS as having shared libraries
    earmv6*-*-netbsd*) :
      arch=arm; model=armv6; system=netbsd ;; #(
    earmv7*-*-netbsd*) :
-@@ -13504,6 +13512,8 @@ fi; system=elf ;; #(
+@@ -13529,6 +13541,8 @@ fi; system=elf ;; #(
      arch=arm64; system=linux ;; #(
    aarch64-*-freebsd*) :
      arch=arm64; system=freebsd ;; #(
@@ -56,7 +74,17 @@ Recognise SunOS as having shared libraries
    x86_64-*-cygwin*) :
      arch=amd64; system=cygwin
   ;; #(
-@@ -13788,7 +13798,7 @@ fi
+@@ -13730,6 +13744,9 @@ esac ;; #(
+   *) :
+      ;;
+ esac ;; #(
++  power,netbsd) :
++    default_as="${toolpref}as -mppc"
++    default_aspp="${toolpref}gcc -c" ;; #(
+   s390x,elf) :
+     default_as="${toolpref}as -m 64 -march=$model"
+     default_aspp="${toolpref}gcc -c -Wa,-march=$model" ;; #(
+@@ -13813,7 +13830,7 @@ fi
  # for the moment, to be backward-compatible
  
  case $host in #(