only build symop table if CCP4 is found

GNUmakefile.in

@@ -40,6 +40,9 @@ includedir			= @includedir@
 LIB_NAME			= @PACKAGE_NAME@
 LIB_TARGET			= $(LIB_NAME).la
 
+CCP4DIR				= @CCP4@
+CLIBD				?= $(CCP4DIR)/lib/data
+
 ifeq "$(CHECK_CONFIG)" "1"
 
 GNUmakefile: config.status GNUmakefile.in
@@ -111,6 +114,8 @@ LIBCIF_SRC		= AtomType.cpp \
 SOURCES			= $(addprefix src/,$(LIBCIF_SRC))
 OBJECTS			= $(addprefix $(OBJDIR)/, $(notdir $(SOURCES:%.cpp=%.lo)))
 
+ifneq "$CCP4DIR" ""
+
 # Special rules to generate symmetry operation number table
 tools/symop-map-generator: tools/symop-map-generator.cpp
 
@@ -119,6 +124,8 @@ src/SymOpTable_data.cpp: tools/symop-map-generator $(CLIBD)/symop.lib
 
 $(OBJDIR)/Symmetry.lo: src/SymOpTable_data.cpp
 
+endif
+
 # version info
 REVISION = $(shell git log --pretty=format:%h --max-count=1)
 REVISION_FILE = version-info-$(REVISION).txt

configure

@@ -644,6 +644,7 @@ BOOST_LDFLAGS
 BOOST_CPPFLAGS
 SET_MAKE
 PKG_CONFIG
+CCP4
 DEBUG
 LIBTOOL_DEPS
 CXXCPP
@@ -763,6 +764,7 @@ LT_SYS_LIBRARY_PATH
 CPP
 CXXCPP
 DEBUG
+CCP4
 LIBZ_CPPFLAGS
 LIBZ_LDFLAGS
 LIBBZ2_CPPFLAGS
@@ -1437,6 +1439,7 @@ Some influential environment variables:
   CPP         C preprocessor
   CXXCPP      C++ preprocessor
   DEBUG       Build a debug version of the library
+  CCP4        The location where CCP4 is installed
   LIBZ_CPPFLAGS
               C preprocessor flags for LIBZ headers
   LIBZ_LDFLAGS
@@ -16014,6 +16017,8 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
 
 
+
+
 # Extract the first word of "pkg-config", so it can be a program name with args.
 set dummy pkg-config; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5

configure.ac

@@ -26,6 +26,8 @@ AC_SUBST(LIBTOOL_DEPS)
 
 AC_ARG_VAR([DEBUG], [Build a debug version of the library])
 
+AC_ARG_VAR([CCP4], [The location where CCP4 is installed])
+
 AC_PATH_PROG([PKG_CONFIG], [pkg-config])
 
 AC_CHECK_FUNCS([floor pow rint sqrt strchr strerror])