[runcard] in CODEGEN launch_plugin.py, prepend 'BACKEND=xxx' to 'make…

… madevent_xxx_link' in args[0][0] to support USEBUILDDIR=1 (part of madgraph5#945)

Then regenerate gg_tt.mad

However lauX.sh still fails

epochX/cudacpp/CODEGEN/PLUGIN/CUDACPP_SA_OUTPUT/launch_plugin.py

@@ -40,7 +40,7 @@ def compile(self, *args, **opts):
             cudacpp_backend = self.run_card['cudacpp_backend'].lower() # the default value is defined in launch_plugin.py
             logger.info("Building madevent in madevent_interface.py with '%s' matrix elements"%cudacpp_backend)
             if cudacpp_backend in cudacpp_supported_backends :
-                args[0][0] = 'madevent_' + cudacpp_backend + '_link'
+                args[0][0] = 'BACKEND=' + cudacpp_backend + ' madevent_' + cudacpp_backend + '_link'
             else:
                 raise Exception( "Invalid cudacpp_backend='%s': supported backends are %s"%supported_backends )
             return misc.compile(nb_core=self.options['nb_core'], *args, **opts)

epochX/cudacpp/gg_tt.mad/CODEGEN_mad_gg_tt_log.txt

@@ -62,7 +62,7 @@ generate g g > t t~
 No model currently active, so we import the Standard Model
 INFO: load particles 
 INFO: load vertices 
-DEBUG: model prefixing  takes 0.005624532699584961 
+DEBUG: model prefixing  takes 0.005587100982666016 
 INFO: Restrict model sm with file models/sm/restrict_default.dat . 
 DEBUG: Simplifying conditional expressions 
 DEBUG: remove interactions: u s w+ at order: QED=1 
@@ -155,7 +155,7 @@ INFO: Please specify coupling orders to bypass this step.
 INFO: Trying coupling order WEIGHTED<=2: WEIGTHED IS QCD+2*QED 
 INFO: Trying process: g g > t t~ WEIGHTED<=2 @1  
 INFO: Process has 3 diagrams 
-1 processes with 3 diagrams generated in 0.009 s
+1 processes with 3 diagrams generated in 0.008 s
 Total: 1 processes with 3 diagrams
 output madevent_simd ../TMPOUT/CODEGEN_mad_gg_tt --hel_recycling=False --vector_size=32
 Load PLUGIN.CUDACPP_OUTPUT
@@ -178,7 +178,7 @@ INFO: Generating Helas calls for process: g g > t t~ WEIGHTED<=2 @1
 INFO: Processing color information for process: g g > t t~ @1 
 INFO: Creating files in directory P1_gg_ttx 
 DEBUG:  kwargs[prefix] = 0 [model_handling.py at line 1152] 
-DEBUG:  process_exporter_cpp =  <PLUGIN.CUDACPP_OUTPUT.model_handling.PLUGIN_OneProcessExporter object at 0x7fd872b45d90> [export_v4.py at line 6261] 
+DEBUG:  process_exporter_cpp =  <PLUGIN.CUDACPP_OUTPUT.model_handling.PLUGIN_OneProcessExporter object at 0x7f0fbfc85d90> [export_v4.py at line 6261] 
 INFO: Creating files in directory . 
 FileWriter <class 'PLUGIN.CUDACPP_OUTPUT.model_handling.PLUGIN_CPPWriter'> for ././CPPProcess.h
 FileWriter <class 'PLUGIN.CUDACPP_OUTPUT.model_handling.PLUGIN_CPPWriter'> for ././CPPProcess.cc
@@ -198,15 +198,15 @@ INFO: Finding symmetric diagrams for subprocess group gg_ttx
 DEBUG:  iconfig_to_diag =  {1: 1, 2: 2, 3: 3} [model_handling.py at line 1544] 
 DEBUG:  diag_to_iconfig =  {1: 1, 2: 2, 3: 3} [model_handling.py at line 1545] 
 Generated helas calls for 1 subprocesses (3 diagrams) in 0.006 s
-Wrote files for 10 helas calls in 0.122 s
+Wrote files for 10 helas calls in 0.118 s
 ALOHA: aloha starts to compute helicity amplitudes
 ALOHA: aloha creates VVV1 set of routines with options: P0
 ALOHA: aloha creates FFV1 routines
 ALOHA: aloha creates 2 routines in  0.149 s
 ALOHA: aloha starts to compute helicity amplitudes
 ALOHA: aloha creates VVV1 set of routines with options: P0
 ALOHA: aloha creates FFV1 routines
-ALOHA: aloha creates 4 routines in  0.135 s
+ALOHA: aloha creates 4 routines in  0.136 s
 <class 'aloha.create_aloha.AbstractRoutine'> VVV1
 <class 'aloha.create_aloha.AbstractRoutine'> FFV1
 <class 'aloha.create_aloha.AbstractRoutine'> FFV1
@@ -241,9 +241,9 @@ Type "launch" to generate events from this process, or see
 Run "open index.html" to see more information about this process.
 quit
 
-real	0m1.968s
-user	0m1.697s
-sys	0m0.269s
+real	0m1.962s
+user	0m1.684s
+sys	0m0.275s
 Code generation completed in 2 seconds
 ************************************************************
 *                                                          *

epochX/cudacpp/gg_tt.mad/bin/internal/launch_plugin.py

@@ -40,7 +40,7 @@ def compile(self, *args, **opts):
             cudacpp_backend = self.run_card['cudacpp_backend'].lower() # the default value is defined in launch_plugin.py
             logger.info("Building madevent in madevent_interface.py with '%s' matrix elements"%cudacpp_backend)
             if cudacpp_backend in cudacpp_supported_backends :
-                args[0][0] = 'madevent_' + cudacpp_backend + '_link'
+                args[0][0] = 'BACKEND=' + cudacpp_backend + ' madevent_' + cudacpp_backend + '_link'
             else:
                 raise Exception( "Invalid cudacpp_backend='%s': supported backends are %s"%supported_backends )
             return misc.compile(nb_core=self.options['nb_core'], *args, **opts)