diff --git a/modules/compiler_vm/languages/_c_base.pm b/modules/compiler_vm/languages/_c_base.pm
index 130ec4e3..c59f4d7b 100755
--- a/modules/compiler_vm/languages/_c_base.pm
+++ b/modules/compiler_vm/languages/_c_base.pm
@@ -17,6 +17,8 @@ sub initialize {
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
   $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c11 -lm -Wfatal-errors';
+  $self->{options_paste}   = '-fdiagnostics-show-caret';
+  $self->{options_nopaste} = '-fno-diagnostics-show-caret';
   $self->{cmdline}         = 'gcc -ggdb -g3 $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';
diff --git a/modules/compiler_vm/languages/_default.pm b/modules/compiler_vm/languages/_default.pm
index fa37d550..9b5824c5 100755
--- a/modules/compiler_vm/languages/_default.pm
+++ b/modules/compiler_vm/languages/_default.pm
@@ -91,14 +91,22 @@ sub show_output {
     $cmdline =~ s/\$sourcefile/$self->{sourcefile}/g;
     $cmdline =~ s/\$execfile/$self->{execfile}/g;
 
+    my $options;
     if (length $self->{cmdline_options}) {
-      $cmdline =~ s/\$options/$self->{cmdline_options}/g;
+      $options = $self->{cmdline_options};
     } else {
-      if (length $self->{default_options}) {
-        $cmdline =~ s/\$options/$self->{default_options}/g;
-      } else {
-        $cmdline =~ s/\$options\s+//g;
-      }
+      $options = $self->{default_options};
+    }
+
+    if (exists $self->{options_paste}) {
+      $options .= ' ' if length $options;
+      $options .= $self->{options_paste};
+    }
+
+    if (length $options) {
+      $cmdline =~ s/\$options/$options/;
+    } else {
+      $cmdline =~ s/\$options\s+//;
     }
 
     my $pretty_code = $self->pretty_format($self->{code});
@@ -218,10 +226,29 @@ sub execute {
   $cmdline =~ s/\$sourcefile/$self->{sourcefile}/g;
   $cmdline =~ s/\$execfile/$self->{execfile}/g;
 
+  my $options;
   if (length $self->{cmdline_options}) {
-    $cmdline =~ s/\$options/$self->{cmdline_options}/g;
+    $options = $self->{cmdline_options};
   } else {
-    $cmdline =~ s/\$options/$self->{default_options}/g;
+    $options = $self->{default_options};
+  }
+
+  if ((not exists $self->{options}->{'-paste'}) and (not defined $self->{got_run} or $self->{got_run} ne 'paste')) {
+    if (exists $self->{options_nopaste}) {
+      $options .= ' ' if length $options;
+      $options .= $self->{options_nopaste};
+    }
+  } else {
+    if (exists $self->{options_paste}) {
+      $options .= ' ' if length $options;
+      $options .= $self->{options_paste};
+    }
+  }
+
+  if (length $options) {
+    $cmdline =~ s/\$options/$options/;
+  } else {
+    $cmdline =~ s/\$options\s+//;
   }
 
   open FILE, ">> log.txt";
diff --git a/modules/compiler_vm/languages/c11.pm b/modules/compiler_vm/languages/c11.pm
index 2711d870..566796bc 100755
--- a/modules/compiler_vm/languages/c11.pm
+++ b/modules/compiler_vm/languages/c11.pm
@@ -11,7 +11,9 @@ sub initialize {
 
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
-  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c11 -lm -Wfatal-errors -fsanitize=bounds -fsanitize=alignment -fno-diagnostics-show-caret';
+  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c11 -lm -Wfatal-errors -fsanitize=bounds -fsanitize=alignment';
+  $self->{options_paste}   = '-fdiagnostics-show-caret';
+  $self->{options_nopaste} = '-fno-diagnostics-show-caret';
   $self->{cmdline}         = 'gcc -ggdb -g3 $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';
diff --git a/modules/compiler_vm/languages/c89.pm b/modules/compiler_vm/languages/c89.pm
index ef3eb528..8bbb309b 100755
--- a/modules/compiler_vm/languages/c89.pm
+++ b/modules/compiler_vm/languages/c89.pm
@@ -12,6 +12,8 @@ sub initialize {
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
   $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c89 -lm -Wfatal-errors -fsanitize=bounds -fsanitize=alignment';
+  $self->{options_paste}   = '-fdiagnostics-show-caret';
+  $self->{options_nopaste} = '-fno-diagnostics-show-caret';
   $self->{cmdline}         = 'gcc -ggdb -g3 $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';
@@ -21,6 +23,7 @@ sub initialize {
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <float.h>
 #include <math.h>
 #include <limits.h>
 #include <sys/types.h>
@@ -31,6 +34,9 @@ sub initialize {
 #include <locale.h>
 #include <setjmp.h>
 #include <signal.h>
+#include <time.h>
+#include <stdarg.h>
+#include <stddef.h>
 #include <prelude.h>
 
 END
diff --git a/modules/compiler_vm/languages/c99.pm b/modules/compiler_vm/languages/c99.pm
index 7a23ef25..7f276f41 100755
--- a/modules/compiler_vm/languages/c99.pm
+++ b/modules/compiler_vm/languages/c99.pm
@@ -12,6 +12,8 @@ sub initialize {
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
   $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c99 -lm -Wfatal-errors -fsanitize=bounds -fsanitize=alignment';
+  $self->{options_paste}   = '-fdiagnostics-show-caret';
+  $self->{options_nopaste} = '-fno-diagnostics-show-caret';
   $self->{cmdline}         = 'gcc -ggdb -g3 $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';
diff --git a/modules/compiler_vm/languages/clang11.pm b/modules/compiler_vm/languages/clang11.pm
index 7181b593..da6036e3 100755
--- a/modules/compiler_vm/languages/clang11.pm
+++ b/modules/compiler_vm/languages/clang11.pm
@@ -11,7 +11,9 @@ sub initialize {
 
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
-  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c11 -lm -Wfatal-errors -fsanitize=integer -fsanitize=bounds -fsanitize=undefined -fno-caret-diagnostics';
+  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c11 -lm -Wfatal-errors -fsanitize=integer -fsanitize=bounds -fsanitize=undefined';
+  $self->{options_paste}   = '-fcaret-diagnostics';
+  $self->{options_nopaste} = '-fno-caret-diagnostics';
   $self->{cmdline}         = 'clang -g $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';
diff --git a/modules/compiler_vm/languages/clang89.pm b/modules/compiler_vm/languages/clang89.pm
index 4faaf8b7..d7bedd7d 100755
--- a/modules/compiler_vm/languages/clang89.pm
+++ b/modules/compiler_vm/languages/clang89.pm
@@ -11,7 +11,9 @@ sub initialize {
 
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
-  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c89 -lm -Wfatal-errors -fsanitize=integer -fsanitize=bounds -fsanitize=undefined -fno-caret-diagnostics';
+  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c89 -lm -Wfatal-errors -fsanitize=integer -fsanitize=bounds -fsanitize=undefined';
+  $self->{options_paste}   = '-fcaret-diagnostics';
+  $self->{options_nopaste} = '-fno-caret-diagnostics';
   $self->{cmdline}         = 'clang -ggdb -g3 $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';
@@ -30,6 +32,9 @@ sub initialize {
 #include <locale.h>
 #include <setjmp.h>
 #include <signal.h>
+#include <time.h>
+#include <stdarg.h>
+#include <stddef.h>
 #include <prelude.h>
 
 END
diff --git a/modules/compiler_vm/languages/clang99.pm b/modules/compiler_vm/languages/clang99.pm
index d1704cb7..1a7a9dcb 100755
--- a/modules/compiler_vm/languages/clang99.pm
+++ b/modules/compiler_vm/languages/clang99.pm
@@ -11,7 +11,9 @@ sub initialize {
 
   $self->{sourcefile}      = 'prog.c';
   $self->{execfile}        = 'prog';
-  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c99 -lm -Wfatal-errors -fsanitize=integer -fsanitize=bounds -fsanitize=undefined -fno-caret-diagnostics';
+  $self->{default_options} = '-Wextra -Wall -Wno-unused -pedantic -Wfloat-equal -Wshadow -std=c99 -lm -Wfatal-errors -fsanitize=integer -fsanitize=bounds -fsanitize=undefined';
+  $self->{options_paste}   = '-fcaret-diagnostics';
+  $self->{options_nopaste} = '-fno-caret-diagnostics';
   $self->{cmdline}         = 'clang -ggdb -g3 $sourcefile $options -o $execfile';
 
   $self->{prelude} = <<'END';