$NetBSD: patch-configure.ac,v 1.2 2022/02/08 07:45:02 pho Exp $

Hunk #0, #3:
  The stage-0 compiler isn't guaranteed to have an event-logging RTS.
  https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7518

Hunk #1:
  Fix build on OmniOS and possibly other Solaris-based OSes too: when its
  ln(1) is asked to create a hard link to a symbolic one, it doesn't follow
  the symlink first.

Hunk #2:
  Disable DTrace support on solaris2.
  XXX: But why?

--- configure.ac.orig	2022-01-25 09:29:55.257778230 +0000
+++ configure.ac
@@ -178,13 +178,21 @@ if test "$WithGhc" != ""; then
   dnl See Note [Linking ghc-bin against threaded stage0 RTS] in
   dnl hadrian/src/Settings/Packages.hs for details.
   dnl SMP support which implies a registerised stage0 is also required (see issue 18266)
-  if echo ${RTS_WAYS_STAGE0} | grep '.*thr.*' 2>&1 >/dev/null && \
+  if echo ${RTS_WAYS_STAGE0} | tr ' ' '\n' | grep '^thr$' 2>&1 >/dev/null && \
      test "$SUPPORT_SMP_STAGE0" = "YES"
   then
       AC_SUBST(GhcThreadedRts, YES)
   else
       AC_SUBST(GhcThreadedRts, NO)
   fi
+
+  dnl Same for an event logging RTS.
+  if echo ${RTS_WAYS_STAGE0} | tr ' ' '\n' | grep '^l$' 2>&1 >/dev/null
+  then
+      AC_SUBST(GhcEventLoggingRts, YES)
+  else
+      AC_SUBST(GhcEventLoggingRts, NO)
+  fi
 fi
 
 dnl ** Must have GHC to build GHC
@@ -727,23 +735,23 @@ dnl ------------------------------------
 dnl ** Copy the files from the "fs" utility into the right folders.
 dnl --------------------------------------------------------------
 AC_MSG_NOTICE([Creating links for in-tree file handling routines])
-ln -f utils/fs/fs.* utils/lndir/
-ln -f utils/fs/fs.* utils/unlit/
-ln -f utils/fs/fs.* rts/
-ln -f utils/fs/fs.h libraries/base/include/
-ln -f utils/fs/fs.c libraries/base/cbits/
+cp -p utils/fs/fs.* utils/lndir/
+cp -p utils/fs/fs.* utils/unlit/
+cp -p utils/fs/fs.* rts/
+cp -p utils/fs/fs.h libraries/base/include/
+cp -p utils/fs/fs.c libraries/base/cbits/
 AC_MSG_NOTICE([Routines in place. Packages can now be build normally.])
 
 dnl ** Copy files for ghci wrapper C utilities.
 dnl --------------------------------------------------------------
 dnl See Note [Hadrian's ghci-wrapper package] in hadrian/src/Packages.hs
 AC_MSG_NOTICE([Creating links for ghci wrapper])
-ln -f driver/utils/getLocation.c driver/ghci/
-ln -f driver/utils/getLocation.h driver/ghci/
-ln -f driver/utils/isMinTTY.c driver/ghci/
-ln -f driver/utils/isMinTTY.h driver/ghci/
-ln -f driver/utils/cwrapper.c driver/ghci/
-ln -f driver/utils/cwrapper.h driver/ghci/
+cp -p driver/utils/getLocation.c driver/ghci/
+cp -p driver/utils/getLocation.h driver/ghci/
+cp -p driver/utils/isMinTTY.c driver/ghci/
+cp -p driver/utils/isMinTTY.h driver/ghci/
+cp -p driver/utils/cwrapper.c driver/ghci/
+cp -p driver/utils/cwrapper.h driver/ghci/
 AC_MSG_NOTICE([done.])
 
 dnl --------------------------------------------------------------
@@ -870,7 +878,7 @@ if test "x$EnableDtrace" = "xyes"; then
   if test -n "$DtraceCmd"; then
     if test "x$TargetOS_CPP-$TargetVendor_CPP" = "xdarwin-apple" \
       -o "x$TargetOS_CPP-$TargetVendor_CPP" = "xfreebsd-portbld" \
-      -o "x$TargetOS_CPP-$TargetVendor_CPP" = "xsolaris2-unknown"; then
+      ; then
       HaveDtrace=YES
     fi
   fi
@@ -1438,6 +1446,7 @@ echo "\
    Bootstrapping using   : $WithGhc
       which is version   : $GhcVersion
       with threaded RTS? : $GhcThreadedRts
+      with eventlog RTS? : $GhcEventLoggingRts
 "
 
 if test "x$CcLlvmBackend" = "xYES"; then