Re: [Libguestfs] [PATCH v2] daemon: Use a configure-time test to find the best OCaml runtime.

In OCaml 4.06 we need to link to daemon to libasmrun_pic.a (the OCaml runtime linked with -fPIC). Otherwise you will see many errors like this: /usr/bin/ld: /usr/lib64/ocaml/libasmrun.a(startup_aux.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/lib64/ocaml/libasmrun.a(startup.o): relocation R_X86_64_32S against symbol `caml_data_segments' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/lib64/ocaml/libasmrun.a(fail.o): relocation R_X86_64_32 against symbol `caml_exn_Failure' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /usr/lib64/ocaml/libasmrun.a(roots.o): relocation R_X86_64_32 against symbol `caml_frametable' can not be used when making a shared object; recompile with -fPIC This commit use a configure-time test to find the best OCaml runtime. --- daemon/Makefile.am | 2 -- m4/guestfs-ocaml.m4 | 26 ++++++++++++++++++++++++++ 2 files changed, 26 insertions(+), 2 deletions(-) diff --git a/daemon/Makefile.am b/daemon/Makefile.am index af3184d3e..27630d2bc 100644 --- a/daemon/Makefile.am +++ b/daemon/Makefile.am @@ -328,10 +328,8 @@ OCAMLFLAGS = $(OCAML_FLAGS) $(OCAML_WARN_ERROR) if !HAVE_OCAMLOPT OBJECTS = $(BOBJECTS) -CAMLRUN = camlrun else OBJECTS = $(XOBJECTS) -CAMLRUN = asmrun endif OCAML_LIBS = \ -lmlpcre \ diff --git a/m4/guestfs-ocaml.m4 b/m4/guestfs-ocaml.m4 index 54ad355cd..3f78d1fb3 100644 --- a/m4/guestfs-ocaml.m4 +++ b/m4/guestfs-ocaml.m4 @@ -85,6 +85,32 @@ if test "x$enable_daemon" = "xyes"; then if test "x$OCAML_PKG_hivex" = "xno"; then AC_MSG_ERROR([the OCaml module 'hivex' is required]) fi + + dnl Check which OCaml runtime to link the daemon again. + dnl We can't use AC_CHECK_LIB here unfortunately because + dnl the other symbols are resolved by OCaml itself. + AC_MSG_CHECKING([which OCaml runtime we should link the daemon with]) + if test "x$OCAMLOPT" != "xno"; then + for f in asmrun_pic asmrun; do + if test -f "$OCAMLLIB/lib$f.a"; then + CAMLRUN=$f + break + fi + done + else + for f in camlrun; do + if test -f "$OCAMLLIB/lib$f.a"; then + CAMLRUN=$f + break + fi + done + fi + if test "x$CAMLRUN" != "x"; then + AC_MSG_RESULT([$CAMLRUN]) + else + AC_MSG_ERROR([could not find or link to libasmrun or libcamlrun]) + fi + AC_SUBST([CAMLRUN])