Revert "Merge pull request #22 from fukatani/master"

This reverts commit 167649e, reversing
changes made to d0cb60a.

Author: shtaxxx

.travis.yml

@@ -1,7 +1,5 @@
 .PHONY: all
 all:
-	export PYTHON=python3
-	export PYTHON27=python2.7
 	make -C ./pyverilog
 
 .PHONY: clean

Makefile

@@ -1,8 +1,4 @@
-ifndef EXE_TRAVIS
-	PYTHON=python3
-else
-	PYTHON=python
-endif
+PYTHON=python3
 #OPT=-m pdb
 #OPT=-m cProfile -s time
 #OPT=-m cProfile -o profile.rslt

pyverilog/ast_code_generator/Makefile

@@ -1,8 +1,3 @@
-ifndef EXE_TRAVIS
-	PYTHON=python3
-else
-	PYTHON=python
-endif
 PYTHON=python3
 #PYTHON=python2.7
 #OPT=-m pdb

pyverilog/controlflow/Makefile

@@ -1,8 +1,4 @@
-ifndef EXE_TRAVIS
-	PYTHON=python3
-else
-	PYTHON=python
-endif
+PYTHON=python3
 #PYTHON=python2.7
 PYTHON27=python2.7
 #OPT=-m pdb
@@ -46,18 +42,11 @@ subset:
 
 .PHONY: codegen
 codegen:
-	$(PYTHON) $(OPT) $(CODEGEN) $(SRCS) $(TOP) $(TARGETS) $(CODEGEN_OPT)
+		$(PYTHON) $(OPT) $(CODEGEN) $(SRCS) $(TOP) $(TARGETS) $(CODEGEN_OPT)
 
 .PHONY: graphgen
 graphgen:
-ifdef EXE_TRAVIS
-ifdef EXE_GRAPHGEN
-	python --version
-	$(PYTHON) $(OPT) $(GRAPHGEN) $(SRCS) $(TOP) $(TARGETS) $(GRAPHGEN_OPT)
-endif
-else
-	$(PYTHON27) $(OPT) $(GRAPHGEN) $(SRCS) $(TOP) $(TARGETS) $(GRAPHGEN_OPT)
-endif
+		$(PYTHON27) $(OPT) $(GRAPHGEN) $(SRCS) $(TOP) $(TARGETS) $(GRAPHGEN_OPT)
 
 .PHONY: clean
 clean: