Add MODULE_COMPAT_SUFFIX variable

This allows us to easily distinguish packages built against normal
PostgreSQL server and modular PostgreSQL server.

* configure.ac (MODULE_COMPAT_SUFFIX): New option.
* lib/rpm/macros.d/macros.in: Use @MODULE_COMPAT_SUFFIX@.

Author: praiskup

NEWS

@@ -5,6 +5,11 @@ New in 8.3 version:
 * postgresql-setup creates correct 'log_directory' based on PG version
   (the default changed from $datadir/pg_log to $datadir/log in v10).
 
+* Modular PostgreSQL builds can provide/depend on
+  postgresql-server(:MODULE_COMPAT_11<some_suffix>) instead of
+  postgresql-server(:MODULE_COMPAT_11) to avoid clash with non-modular
+  builds.
+
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 New in 8.2 version:

configure.ac

@@ -170,6 +170,8 @@ AC_ARG_WITH([libs-pkg],
             [], [withval=yes])
 _AX_TEXT_TPL_SUBST([LIBS_ENABLED], [$withval])
 
+PGSETUP_SUBST_OPT([MODULE_COMPAT_SUFFIX], [],
+                  [add suffix to module provides in %postgresql_module_requires])
 PGSETUP_SUBST_OPT([NAME_SRV_PFX], [],
                   [service name prefix, like (PFX)postgresql.service])
 PGSETUP_SUBST_OPT([NAME_SRV_SFX], [],

lib/rpm/macros.d/macros.in

@@ -6,4 +6,4 @@
 
 %@NAME_SERVICE_VARNAME@_major @PGMAJORVERSION@
 
-%@NAME_SERVICE_VARNAME@_module_requires Requires: @NAME_SERVICE_VARNAME@-server(:MODULE_COMPAT_@PGMAJORVERSION@)
+%@NAME_SERVICE_VARNAME@_module_requires Requires: @NAME_SERVICE_VARNAME@-server(:MODULE_COMPAT_@PGMAJORVERSION@@MODULE_COMPAT_SUFFIX@)