Replace %{ix86} tests with more general %{have_ocaml} macro

libnbd.spec

@@ -1,3 +1,8 @@
+# i686 no longer has any kind of OCaml compiler, not even ocamlc.
+%ifnarch %{ix86}
+%global have_ocaml 1
+%endif
+
 # If we should verify tarball signature with GPGv2.
 %global verify_tarball_signature 1
 
@@ -55,7 +60,7 @@ BuildRequires:  ubdsrv-devel >= 1.0-3.rc6
 # For the Python 3 bindings.
 BuildRequires:  python3-devel
 
-%ifnarch %{ix86}
+%if 0%{?have_ocaml}
 # For the OCaml bindings.
 BuildRequires:  ocaml
 BuildRequires:  ocaml-findlib-devel
@@ -95,7 +100,7 @@ BuildRequires:  nbdkit-sh-plugin
 BuildRequires:  nbdkit-sparse-random-plugin
 %endif
 
-%ifnarch %{ix86}
+%if 0%{?have_ocaml}
 # The OCaml runtime system does not provide this symbol
 %global __ocaml_requires_opts -x Stdlib__Callback
 %endif
@@ -131,7 +136,7 @@ Requires:       %{name}%{?_isa} = %{version}-%{release}
 This package contains development headers for %{name}.
 
 
-%ifnarch %{ix86}
+%if 0%{?have_ocaml}
 %package -n ocaml-%{name}
 Summary:        OCaml language bindings for %{name}
 Requires:       %{name}%{?_isa} = %{version}-%{release}
@@ -221,7 +226,7 @@ autoreconf -i
     --with-tls-priority=@LIBNBD,SYSTEM \
     PYTHON=%{__python3} \
     --enable-python \
-%ifnarch %{ix86}
+%if 0%{?have_ocaml}
     --enable-ocaml \
 %else
     --disable-ocaml \
@@ -242,7 +247,7 @@ find $RPM_BUILD_ROOT -name '*.la' -delete
 # Delete the golang man page since we're not distributing the bindings.
 rm $RPM_BUILD_ROOT%{_mandir}/man3/libnbd-golang.3*
 
-%ifarch %{ix86}
+%if !0%{?have_ocaml}
 # Delete the OCaml man page on i686.
 rm $RPM_BUILD_ROOT%{_mandir}/man3/libnbd-ocaml.3*
 %endif
@@ -313,7 +318,7 @@ make %{?_smp_mflags} check || {
 %{_mandir}/man3/nbd_*.3*
 
 
-%ifnarch %{ix86}
+%if 0%{?have_ocaml}
 %files -n ocaml-%{name}
 %dir %{_libdir}/ocaml/nbd
 %{_libdir}/ocaml/nbd/META