fix: added header guards, and some testing purpose autotools rules

src/Makefile.am

@@ -1,25 +1,46 @@
 # define the subdirectories
 SUBDIRS = \
-	  ast \
-      parser \
-	  lexer \
-	  io_backend \
-	  execution \
-	  expansion
-#  + utils if needed
+		ast \
+		parser \
+		lexer \
+		io_backend \
+		execution \
+		expansin \
+		utils
 
 bin_PROGRAMS = 42sh
 
-42sh_SOURCES = 42sh.c
+42sh_SOURCES = main.c
 
 42sh_CPPFLAGS = -I%D%
 
 42sh_CFLAGS = -std=c99 -pedantic -Werror -Wall -Wextra -Wvla
 
 42sh_LDADD =  \
-       ast/libast.a \
-       parser/libparser.a \
-	   lexer/liblexer.a \
-	   io_backend/libio_backend.a \
-	   expansion/libexpansion.a \
-	   execution/libexecution.a
+		ast/libast.a \
+		parser/libparser.a \
+		lexer/liblexer.a \
+		io_backend/libio_backend.a \
+		expansion/libexpansion.a \
+		execution/libexecution.a \
+		utils/libutils.a
+
+
+################################################# Test
+
+bin_PROGRAMS = 42sh_asan
+
+42sh_asan_SOURCES = main.c
+
+42sh_asan_CPPFLAGS = -I%D%
+
+42sh_asan_CFLAGS = -std=c99 -pedantic -Werror -Wall -Wextra -Wvla -g -fsanitize=address
+
+42sh_asan_LDADD =  \
+		ast/libast.a \
+		parser/libparser.a \
+		lexer/liblexer.a \
+		io_backend/libio_backend.a \
+		expansion/libexpansion.a \
+		execution/libexecution.a \
+		utils/libutils.a