Add optional testing group for srfi-64

This adds an optional group to CMakeLists for
systems with SRFI-64 included.

CMakeLists.txt

@@ -323,6 +323,17 @@ IF (NOT GUILE_EXECUTABLE)
   MESSAGE (SEND_ERROR "The guile executable was not found, but is required. Please set GUILE_EXECUTABLE.")
 ENDIF (NOT GUILE_EXECUTABLE)
 
+# Test that guile has SRFI-64. This is required for some unit tests.
+execute_process (COMMAND ${GUILE_EXECUTABLE} -c "(use-modules (srfi srfi-64))"
+  RESULT_VARIABLE GNC_SRFI64_RESULT
+  ERROR_QUIET
+)
+
+if (GNC_SRFI64_RESULT EQUAL 0)
+  message (STATUS "Using guile SRFI-64")
+  set (HAVE_SRFI64 TRUE)
+endif ()
+
 # ############################################################
 IF (WITH_AQBANKING)
   GNC_PKG_CHECK_MODULES (GWENHYWFAR REQUIRED gwenhywfar)

gnucash/report/standard-reports/test/CMakeLists.txt

@@ -6,6 +6,9 @@ SET(scm_test_standard_reports_SOURCES
   test-standard-net-linechart.scm
 )
 
+set(scm_test_with_srfi64_SOURCES
+)
+
 SET(scm_test_report_SUPPORT
   test-generic-category-report.scm
   test-generic-net-barchart.scm
@@ -23,6 +26,11 @@ set(GUILE_DEPENDS
   scm-standard-reports
   scm-report-stylesheets
   )
+
+if (HAVE_SRFI64)
+  gnc_add_scheme_tests("${scm_test_with_srfi64_SOURCES}")
+endif (HAVE_SRFI64)
+
 GNC_ADD_SCHEME_TESTS("${scm_test_standard_reports_SOURCES}")
 
 GNC_ADD_SCHEME_TARGETS(scm-test-standard-support
@@ -41,4 +49,5 @@ GNC_ADD_SCHEME_TARGETS(scm-test-standard-reports
 add_dependencies(check scm-test-standard-reports)
 
 SET_DIST_LIST(test_standard_reports_DIST CMakeLists.txt 
+  ${scm_test_with_srfi64_SOURCES}
   ${scm_test_standard_reports_SOURCES} ${scm_test_report_SUPPORT})