Possibly better way to enable bytecode builds.

Don't disable the -data subpackage this time.

camomile-0.8.5-bytecode.patch

@@ -0,0 +1,11 @@
+--- camomile-0.8.5/Makefile.in.orig	2015-07-21 14:28:26.837692955 +0100
++++ camomile-0.8.5/Makefile.in	2015-07-21 14:28:47.560716204 +0100
+@@ -70,7 +70,7 @@
+ # Generic targets
+ #################
+ 
+-all : byte $(OCAMLBEST) opt unidata unimaps charmap_data locale_data
++all : byte $(OCAMLBEST) unidata unimaps charmap_data locale_data
+ 
+ # Build the library
+ ###################

ocaml-camomile.spec

@@ -2,7 +2,7 @@
 
 Name:           ocaml-camomile
 Version:        0.8.5
-Release:        11%{?dist}
+Release:        12%{?dist}
 Summary:        Unicode library for OCaml
 
 # Several files are MIT and UCD licensed, but the overall work is LGPLv2+
@@ -15,6 +15,9 @@ Source0:        http://downloads.sourceforge.net/camomile/camomile-%{version}.ta
 # Use ocamlopt -g option to enable debuginfo.
 Patch1:         camomile-0.8.3-enable-debug.patch
 
+# Don't compile native code when ocamlopt not detected.
+Patch2:         camomile-0.8.5-bytecode.patch
+
 BuildRequires:  ocaml >= 3.12.1-12
 BuildRequires:  ocaml-findlib-devel
 BuildRequires:  ocaml-ocamldoc
@@ -38,7 +41,6 @@ The %{name}-devel package contains libraries and signature files for
 developing applications that use %{name}.
 
 
-%if %opt
 %package        data
 Summary:        Data files for %{name}
 Requires:       %{name} = %{version}-%{release}
@@ -47,24 +49,20 @@ Requires:       %{name} = %{version}-%{release}
 %description    data
 The %{name}-data package contains data files for developing
 applications that use %{name}.
-%endif
 
 
 %prep
 %setup -q -n camomile-%{version}
 
 %patch1 -p1
+%patch2 -p1
 
 
 %build
 # Parallel builds don't work.
 unset MAKEFLAGS
 ./configure --prefix=%{_prefix} --datadir=%{_datadir} --libdir=%{_libdir}
-%if %opt
 make
-%else
-make byte
-%endif
 make dochtml
 make man
 
@@ -108,18 +106,15 @@ cp tools/camomilelocaledef.opt $RPM_BUILD_ROOT%{_bindir}/camomilelocaledef
 %{_libdir}/ocaml/camomile/*.mli
 
 
-%if %opt
 %files data
 %defattr(-,root,root,-)
 %doc README
 %{_datadir}/camomile/
-%endif
 
 
 %changelog
-* Tue Jul 21 2015 Richard W.M. Jones <rjones@redhat.com> - 0.8.5-11
+* Tue Jul 21 2015 Richard W.M. Jones <rjones@redhat.com> - 0.8.5-12
 - Enable bytecode builds.
-- Disable the ocaml-camomile-data package on bytecode builds.
 
 * Tue Jun 23 2015 Richard W.M. Jones <rjones@redhat.com> - 0.8.5-10
 - Bump release and rebuild.