Check for libpq in core before building mod_cdr_pg_csv

configure.ac

@@ -601,6 +601,7 @@ if test x"$enable_core_pgsql_support" = x"yes" ; then
     AC_MSG_RESULT([$POSTGRESQL_LIBDIR])
 
     AC_DEFINE([SWITCH_HAVE_PGSQL], [1], [Define to 1 if PostgreSQL libraries are available])
+    AM_CONDITIONAL([HAVE_PGSQL],[true])
     AC_DEFINE_UNQUOTED([POSTGRESQL_VERSION], "${POSTGRESQL_VERSION}", [Specifies the version of PostgreSQL we are linking against])
     AC_DEFINE_UNQUOTED([POSTGRESQL_MAJOR_VERSION], ${POSTGRESQL_MAJOR_VERSION}, [Specifies the version of PostgreSQL we are linking against])
     AC_DEFINE_UNQUOTED([POSTGRESQL_MINOR_VERSION], ${POSTGRESQL_MINOR_VERSION}, [Specifies the version of PostgreSQL we are linking against])
@@ -612,6 +613,8 @@ if test x"$enable_core_pgsql_support" = x"yes" ; then
     SWITCH_AM_LDFLAGS="$POSTGRESQL_LDFLAGS $SWITCH_AM_LDFLAGS"
 
     LIBS="$save_LIBS"
+else
+  AM_CONDITIONAL([HAVE_PGSQL],[false])
 fi
 
 AC_ARG_ENABLE(deprecated-core-db-events,

src/mod/event_handlers/mod_cdr_pg_csv/Makefile.am

@@ -1,8 +1,17 @@
 include $(top_srcdir)/build/modmake.rulesam
 MODNAME=mod_cdr_pg_csv
 
+if HAVE_PGSQL
+
 mod_LTLIBRARIES = mod_cdr_pg_csv.la
 mod_cdr_pg_csv_la_SOURCES  = mod_cdr_pg_csv.c
 mod_cdr_pg_csv_la_CFLAGS   = $(AM_CFLAGS) $(SWITCH_AM_CXXFLAGS)
 mod_cdr_pg_csv_la_LIBADD   = $(switch_builddir)/libfreeswitch.la
 mod_cdr_pg_csv_la_LDFLAGS  = -avoid-version -module -no-undefined -shared -lpq $(SWITCH_AM_LDFLAGS)
+
+else
+install: error
+all: error
+error:
+	$(error You must configure --enable-core-pgsql-support to build this module)
+endif