[xen staging] tools/ocaml: Specify rpath correctly for ocamlmklib

[patchbot@xxxxxxx]

commit bf8a209915804088c09ac6575bcca554450fa7e8
Author:     Andrii Sultanov <andrii.sultanov@xxxxxxxxx>
AuthorDate: Mon Dec 9 17:57:49 2024 +0000
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Dec 11 10:45:08 2024 +0000

    tools/ocaml: Specify rpath correctly for ocamlmklib
    
    ocamlmklib has special handling for C-like '-Wl,-rpath' option, but does
    not know how to handle '-Wl,-rpath-link', as evidenced by warnings like:
    "Unknown option
    
-Wl,-rpath-link=$HOME/xen/tools/ocaml/libs/eventchn/../../../../tools/libs/toollog"
    Pass this option directly to the compiler with -ccopt instead.
    
    Also pass -L directly to the linker with -ldopt. This prevents embedding 
absolute
    paths from buildtime into binary's RPATH.
    
    Fixes: f7b4e4558b42 ("tools/ocaml: Fix OCaml libs rules")
    Reported-by: Fernando Rodrigues <alpha@xxxxxxxxxxxxxxxxx>
    Tested-by: Fernando Rodrigues <alpha@xxxxxxxxxxxxxxxxx>
    Signed-off-by: Andrii Sultanov <andrii.sultanov@xxxxxxxxx>
    Acked-by: Christian Lindig <christian.lindig@xxxxxxxxx>
---
 tools/ocaml/Makefile.rules | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/ocaml/Makefile.rules b/tools/ocaml/Makefile.rules
index b9d4b51f0a..43f7add072 100644
--- a/tools/ocaml/Makefile.rules
+++ b/tools/ocaml/Makefile.rules
@@ -63,7 +63,7 @@ mk-caml-lib-bytecode = $(call quiet-command, $(OCAMLC) 
$(OCAMLCFLAGS) -a -o $1 $
 
 mk-caml-stubs = $(call quiet-command, $(OCAMLMKLIB) -o `basename $1 .a` 
$2,MKLIB,$1)
 mk-caml-lib-stubs = \
-       $(call quiet-command, $(OCAMLMKLIB) -o `basename $1 .a | sed -e 
's/^lib//'` $2 $3,MKLIB,$1)
+       $(call quiet-command, $(OCAMLMKLIB) -o `basename $1 .a | sed -e 
's/^lib//'` $2 `echo $3 | sed -e 's/-ccopt -l/-l/g' | sed -e 's/-ccopt 
-L/-ldopt -L/g'`,MKLIB,$1)
 
 # define a library target <name>.cmxa and <name>.cma
 define OCAML_LIBRARY_template
@@ -74,7 +74,7 @@ define OCAML_LIBRARY_template
  $(1)_stubs.a: $(foreach obj,$$($(1)_C_OBJS),$(obj).o)
        $(call mk-caml-stubs,$$@, $$+)
  lib$(1)_stubs.a: $(foreach obj,$($(1)_C_OBJS),$(obj).o)
-       $(call mk-caml-lib-stubs,$$@, $$+, $(foreach lib,$(LIBS_$(1)),$(lib)))
+       $(call mk-caml-lib-stubs,$$@, $$+, $(foreach lib,$(LIBS_$(1)),-ccopt 
$(lib)))
 endef
 
 # Dynamically linked OCaml libraries ("plugins" in Dynlink parlance)
--
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