packaging: Add 'Suggests' info in RPM package spec only if it is supported

Author: rsomla1

packaging/CMakeLists.txt

@@ -50,6 +50,41 @@ include(PackageSpecs.cmake)
 
 add_subdirectory(deb-in)
 
+# RPM stuff
+
+find_program(RPM rpm)
+
+if(RPM)
+
+  # Get RPM version
+
+  execute_process(COMMAND ${RPM} "--version"
+    RESULT_VARIABLE res
+    OUTPUT_VARIABLE RPM_VERSION
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+
+  if(res)
+    message(FATAL_ERROR "Could not determine RPM version (${RPM} --version command failed)")
+  endif()
+
+  # Set RPM_VER_NUM to version number in XYYZZ format
+
+  string(REGEX REPLACE "^RPM version *" "" RPM_VERSION ${RPM_VERSION})
+  string(REPLACE "." ";" ver ${RPM_VERSION})
+  list(GET ver 0 ver_major)
+  list(GET ver 1 ver_minor)
+  list(GET ver 2 ver_patch)
+  string(REGEX MATCH "..$" ver_minor "0${ver_minor}")
+  string(REGEX MATCH "..$" ver_patch "0${ver_patch}")
+  set(RPM_VER_NUM "${ver_major}${ver_minor}${ver_patch}")
+
+  message(STATUS "Using RPM tools version: ${RPM_VERSION} (${RPM_VER_NUM})")
+
+endif()
+
+
+# Gnerate RPM specification
 
 if(PROJECT_NAME STREQUAL CMAKE_PROJECT_NAME)
   set(rpm_spec "${CMAKE_CURRENT_BINARY_DIR}/SPECS/mysql-connector-c++.spec")

packaging/mysql-connector-c++.spec.in

@@ -63,6 +63,12 @@
 %global lib_base_name  libmysqlcppconnx@ABI_VERSION_MAJOR@
 %global lib_base_name_jdbc libmysqlcppconn@JDBC_ABI_VERSION_MAJOR@
 
+# TODO: use %rpmversion if available, note that it is in the format X.Y.Z.Y
+# and the current logic requires numeric format XYYZZ.
+
+%global rpm_ver_num @RPM_VER_NUM@
+
+
 ###############################################
 # Package specifications
 ###############################################
@@ -97,7 +103,10 @@ A C++ interface for communicating with MySQL servers.
 %package        jdbc
 Summary:        MySQL Driver for C++ which mimics the JDBC 4.0 API
 Provides:       %{lib_base_name_jdbc} = %{version}-%{release}
+# Note: Field `Suggests` is recognized by RPM 4.13 and later
+%if %{rpm_ver_num} >= 41300
 Suggests:       krb5-libs, cyrus-sasl-lib, libfido2
+%endif
 Obsoletes:      %{lib_base_name_jdbc} < %{version}-%{release}
 Obsoletes:      mysql-connector-c++%{?product_suffix}-jdbc < %{version}-%{release}
 Obsoletes:      mysql-connector-c++-jdbc < %{version}-%{release}