diff --git a/Makefile b/Makefile
index 9330c31..5e3d449 100644
--- a/Makefile
+++ b/Makefile
@@ -16,12 +16,22 @@ CC=g++
 # compiler flags
 CXXFLAGS= -I$(IDIR) -Wall -pedantic -std=c++20
 ifeq	($(DEBUG),true)
-  # debugging flags
-  CXXFLAGS += -g
+	# debugging flags
+	CXXFLAGS += -g
+	RODIR = $(ODIR)/debug
 else
-  # release flags
-  CXXFLAGS += -Ofast
+	# release flags
+	CXXFLAGS += -Ofast
+	RODIR = $(ODIR)/release
 endif
+ifeq	($(STATIC),true)
+	# static links
+	LDFLAGS += -l:libztd.a
+else
+	# dynamic links
+	LDFLAGS += -lztd
+endif
+
 
 ifeq	($(PROFILE),true)
   CXXFLAGS += -pg
@@ -31,51 +41,49 @@ ifneq	($(RELEASE), true)
 	VSUFFIX=-dev-$(SHA_SHORT)
 endif
 
-ifeq	($(STATIC),true)
-  # static links
-  LDFLAGS += -l:libztd.a
-else
-  # dynamic links
-  LDFLAGS += -lztd
-endif
-
 ## END CONFIG ##
 
+
 $(shell ./generate_version.sh)
 $(shell ./generate_shellcode.sh)
-$(shell mkdir -p $(ODIR))
+
+$(shell mkdir -p $(RODIR))
 $(shell mkdir -p $(BINDIR))
 
 # automatically find .h and .hpp
-DEPS = $(shell find $(IDIR) -type f -regex '.*\.hp?p?' ! -name 'g_version.h' ! -name 'g_shellcode.h')
+DEPS = $(shell find $(IDIR) -type f -regex '.*\.hp?p?')
 # automatically find .c and .cpp and make the corresponding .o rule
-OBJ = $(shell find $(SRCDIR) -type f -regex '.*\.cp?p?' | sed 's|\.cpp|.o|g;s|\.c|.o|g;s|^$(SRCDIR)/|$(ODIR)/|g')
+OBJ = $(shell find $(SRCDIR) -type f -regex '.*\.cp?p?' | sed 's|\.cpp|.o|g;s|\.c|.o|g;s|^$(SRCDIR)/|$(RODIR)/|g')
 
-build: lxsh $(OBJ) $(DEPS)
+build: $(BINDIR)/$(NAME)
 
-$(ODIR)/%.o: $(SRCDIR)/%.c $(DEPS)
+# specific files for autogenerated headers
+$(OBJDIR)/options.o: $(SRCDIR)/options.cpp $(DEPS) $(IDIR)/g_version.h
 	$(CC) $(CXXFLAGS) -c -o $@ $<
 
-$(ODIR)/%.o: $(SRCDIR)/%.cpp $(DEPS)
+$(OBJDIR)/shellcode.o: $(SRCDIR)/shellcode.cpp $(DEPS) $(IDIR)/g_shellcode.h
 	$(CC) $(CXXFLAGS) -c -o $@ $<
 
-$(ODIR)/options.o: $(SRCDIR)/options.cpp $(DEPS) $(IDIR)/g_version.h
+$(OBJDIR)/debashify.o: $(SRCDIR)/debashify.cpp $(DEPS) $(IDIR)/g_shellcode.h
 	$(CC) $(CXXFLAGS) -c -o $@ $<
 
-$(ODIR)/shellcode.o: $(SRCDIR)/shellcode.cpp $(DEPS) $(IDIR)/g_shellcode.h
+# generic files
+
+$(RODIR)/%.o: $(SRCDIR)/%.c $(DEPS)
 	$(CC) $(CXXFLAGS) -c -o $@ $<
 
-$(ODIR)/debashify.o: $(SRCDIR)/debashify.cpp $(DEPS) $(IDIR)/g_shellcode.h
+$(RODIR)/%.o: $(SRCDIR)/%.cpp $(DEPS)
 	$(CC) $(CXXFLAGS) -c -o $@ $<
 
-lxsh: $(OBJ)
-	$(CC) $(CXXFLAGS) -o $@ $^ $(LDFLAGS)
+
+$(BINDIR)/$(NAME): $(OBJ)
+	$(CC) $(CXXFLAGS) $(LDFLAGS) -o $@ $^
 
 test: $(BINDIR)/$(NAME)
 	$(BINDIR)/$(NAME)
 
 clean:
-	rm $(ODIR)/*.o gmon.out
+	rm $(ODIR)/*/*.o
 
 clear:
 	rm $(BINDIR)/$(NAME)
diff --git a/include/struc.hpp b/include/struc.hpp
index 8bd007f..326495b 100644
--- a/include/struc.hpp
+++ b/include/struc.hpp
@@ -102,14 +102,16 @@ class format_error : public std::exception
 {
 public:
   //! @brief Conctructor
-  inline format_error(const std::string& what, const std::string& origin, const std::string& data, int where)  { desc=what; index=where; filename=origin; sdat=data; }
-  inline format_error(const std::string& what, parse_context const& ctx) { desc=what; index=ctx.i; filename=ctx.filename; sdat=ctx.data; }
+  inline format_error(const std::string& what, const std::string& origin, const std::string& data, int where, std::string level="error")  { desc=what; index=where; filename=origin; sdat=data; severity=level; }
+  inline format_error(const std::string& what, parse_context const& ctx, std::string level="error") { desc=what; index=ctx.i; filename=ctx.filename; sdat=ctx.data; severity=level; }
   //! @brief Error message
   inline const char * what () const throw () {return desc.c_str();}
   //! @brief Origin of the data, name of imported file, otherwise empty if generated
   inline const char * origin() const throw () {return filename.c_str();}
   //! @brief Data causing the exception
   inline const char * data() const throw () {return sdat.c_str();}
+  //! @brief Severity of the exception
+  inline const std::string level() const throw () {return severity.c_str();}
   //! @brief Where the error is located in the data
   inline const int where () const throw () {return index;}
 private:
@@ -117,6 +119,7 @@ private:
   int index;
   std::string filename;
   std::string sdat;
+  std::string severity;
 };
 
 // objects
diff --git a/include/util.hpp b/include/util.hpp
index 3c2f871..4c3b434 100644
--- a/include/util.hpp
+++ b/include/util.hpp
@@ -148,8 +148,5 @@ int _exec(std::string const& bin, std::vector<std::string> const& args);
 std::string stringReplace(std::string subject, const std::string& search, const std::string& replace);
 
 void printFormatError(format_error const& e, bool print_line=true);
-void printErrorIndex(const char* in, const int index, const std::string& message, const std::string& origin, bool print_line=true);
-
-int execute(shmain* sh, std::vector<std::string>& args);
 
 #endif //UTIL_HPP
diff --git a/src/options.cpp b/src/options.cpp
index dcb7e9b..e25f5e3 100644
--- a/src/options.cpp
+++ b/src/options.cpp
@@ -30,19 +30,20 @@ ztd::option_set options( {
   ztd::option('R', "no-resolve",    false, "Don't resolve %resolve commands"),
   ztd::option("no-extend",          false, "Don't add lxsh extension functions"),
   ztd::option("debashify",          false, "Attempt to turn a bash-specific script into a POSIX shell script"),
-  ztd::option("\r  [var/fct processing]"),
-  ztd::option("minify-var",         false, "Minify variable names"),
-  ztd::option("minify-fct",         false, "Minify function names"),
+  ztd::option("remove-unused",      false, "Remove unused functions and variables"),
+  ztd::option("list-cmd",           false, "List all commands invoked in the script"),
+  ztd::option("\r  [Variable processing]"),
   ztd::option("exclude-var",        true,  "List of matching regex to ignore for variable processing", "list"),
-  ztd::option("exclude-fct",        true,  "List of matching regex to ignore for function processing", "list"),
   ztd::option("no-exclude-reserved",false, "Don't exclude reserved variables"),
+  ztd::option("minify-var",         false, "Minify variable names"),
   ztd::option("list-var",           false, "List all variables set and invoked in the script"),
   ztd::option("list-var-def",       false, "List all variables set in the script"),
   ztd::option("list-var-call",      false, "List all variables invoked in the script"),
-  ztd::option("list-fct",           false, "List all functions defined in the script"),
-  ztd::option("list-cmd",           false, "List all commands invoked in the script"),
-  ztd::option("remove-unused",      false, "Remove unused functions and variables"),
-  ztd::option("unset-var",          false, "Add 'unset' to all vars at the start of the script to avoid environment interference")
+  ztd::option("unset-var",          false, "Add 'unset' to all variables at the start of the script to avoid environment interference"),
+  ztd::option("\r  [Function processing]"),
+  ztd::option("exclude-fct",        true,  "List of matching regex to ignore for function processing", "list"),
+  ztd::option("minify-fct",         false, "Minify function names"),
+  ztd::option("list-fct",           false, "List all functions defined in the script")
 } );
 
 bool g_cd=false;
@@ -96,9 +97,8 @@ ztd::option_set create_resolve_opts()
 void print_help(const char* arg0)
 {
   printf("%s [options] <file> [arg...]\n", arg0);
-  printf("Link extended shell\n");
-  printf("Include files and resolve commands on build time\n");
-  printf("See --help-commands for help on linker commands\n");
+  printf("Extended shell linker\n");
+  printf("Include files, resolve commands on build time, process and minify shell code\n");
   printf("\n");
   printf("Options:\n");
   options.print_help(4,25);
diff --git a/src/parse.cpp b/src/parse.cpp
index 0c7a0f6..44a1cd9 100644
--- a/src/parse.cpp
+++ b/src/parse.cpp
@@ -41,13 +41,15 @@ std::string unexpected_token(std::string const& s)
 
 void parse_error(std::string const& message, parse_context& ctx)
 {
-  printFormatError(format_error(message, ctx.filename, ctx.data, ctx.i));
+  printFormatError(format_error(message, ctx));
   ctx.has_errored=true;
 }
 
 void parse_error(std::string const& message, parse_context& ctx, uint64_t i)
 {
-  printFormatError(format_error(message, ctx.filename, ctx.data, i));
+  parse_context newctx = ctx;
+  newctx.i = i;
+  printFormatError(format_error(message, newctx));
   ctx.has_errored=true;
 }
 
diff --git a/src/shellcode.cpp b/src/shellcode.cpp
index 2c2a4bb..03919e3 100644
--- a/src/shellcode.cpp
+++ b/src/shellcode.cpp
@@ -5,7 +5,7 @@
 #include "struc_helper.hpp"
 
 const std::map<const std::string, const lxsh_fct> lxsh_extend_fcts = {
-  { "_lxsh_random",         { "[K]", "Generate a random number between 0 and 2^(k*8). Default 2", RANDOM_SH} },
+  { "_lxsh_random",         { "[K]", "Generate a random number between 0 and 2^(K*8). Default 2", RANDOM_SH} },
   { "_lxsh_random_string",  { "[N]", "Generate a random alphanumeric string of length N. Default 20", RANDOM_STRING_SH} },
   { "_lxsh_random_tmpfile", { "[N]", "Get a random TMP filepath, with N random chars. Default 20", RANDOM_TMPFILE_SH, {"_lxsh_random_string"} } }
 };
diff --git a/src/util.cpp b/src/util.cpp
index 905a916..a0a87fa 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -10,6 +10,7 @@
 #include <fstream>
 
 #include <ztd/shell.hpp>
+#include <ztd/color.hpp>
 
 std::string indenting_string="\t";
 
@@ -213,14 +214,13 @@ std::string repeatString(std::string const& str, uint32_t n)
 
 void printFormatError(format_error const& e, bool print_line)
 {
-  printErrorIndex(e.data(), e.where(), e.what(), e.origin(), print_line);
-}
+  const char* in = e.data();
 
-void printErrorIndex(const char* in, const int index, const std::string& message, const std::string& origin, bool print_line)
-{
-  int i=0, j=0; // j: last newline
-  int line=1; //n: line #
-  int in_size=strlen(in);
+  uint64_t index = e.where();
+
+  uint64_t i=0, j=0; // j: last newline
+  uint64_t line=1; //n: line #
+  uint64_t in_size=strlen(in);
   if(index >= 0)
   {
     while(i < in_size && i < index)
@@ -233,56 +233,25 @@ void printErrorIndex(const char* in, const int index, const std::string& message
       i++;
     }
     while(i < in_size && in[i]!='\n')
-    {
       i++;
-    }
   }
-  fprintf(stderr, "%s:%u:%u: %s\n", origin.c_str(), line, index-j+1, message.c_str());
+  std::cerr << ztd::color::b_white;
+  fprintf(stderr, "%s:%lu:%lu: ", e.origin(), line, index-j+1);
+
+  ztd::color level_color;
+  const std::string& level = e.level();
+  if(level == "error")
+    level_color = ztd::color::b_red;
+  else if(level == "warning")
+    level_color = ztd::color::b_magenta;
+  else if(level == "info")
+    level_color = ztd::color::b_cyan;
+
+  std::cerr << level_color << e.level() << ztd::color::none;
+  fprintf(stderr, ": %s\n", e.what());
   if(print_line)
   {
     std::cerr << std::string(in+j, i-j) << std::endl;
     std::cerr << repeatString(" ", index-j) << '^' << std::endl;
   }
 }
-
-
-int execute(shmain* sh, std::vector<std::string>& args)
-{
-  std::string data=sh->generate();
-
-  std::string filename = basename(args[0]);
-
-  // generate path
-  std::string tmpdir = (getenv("TMPDIR") != NULL) ? getenv("TMPDIR") : "/tmp" ;
-  std::string dirpath = tmpdir + "/lxsh_" + ztd::sh("tr -dc '[:alnum:]' < /dev/urandom | head -c10");
-  std::string filepath = dirpath+'/'+filename;
-
-  // create dir
-  if(ztd::exec("mkdir", "-p", dirpath).second)
-  {
-    throw std::runtime_error("Failed to create directory '"+dirpath+'\'');
-  }
-
-  // create stream
-  std::ofstream stream(filepath);
-  if(!stream)
-  {
-    ztd::exec("rm", "-rf", dirpath);
-    throw std::runtime_error("Failed to write to '"+filepath+'\'');
-  }
-
-  // output
-  stream << data;
-  stream.close();
-  if(ztd::exec("chmod", "+x", filepath).second != 0)
-  {
-    ztd::exec("rm", "-rf", dirpath);
-    throw std::runtime_error("Failed to make '"+filepath+"' executable");
-  }
-
-  // exec
-  int retval=_exec(filepath, args);
-  ztd::exec("rm", "-rf", dirpath);
-
-  return retval;
-}