Auto-generate C++ header dependencies

2020-06-01 00:25:25 +03:00
parent 5feff1ffb9
commit 73e4e30b1f
2 changed files with 145 additions and 51 deletions
@@ -0,0 +1,46 @@
+#!/usr/bin/perl
+
+use strict;
+
+my $deps = {};
+for my $line (split /\n/, `grep '^#include "' *.cpp *.h`)
+{
+    if ($line =~ /^([^:]+):\#include "([^"]+)"/s)
+    {
+        $deps->{$1}->{$2} = 1;
+    }
+}
+
+my $added;
+do
+{
+    $added = 0;
+    for my $file (keys %$deps)
+    {
+        for my $dep (keys %{$deps->{$file}})
+        {
+            if ($deps->{$dep})
+            {
+                for my $subdep (keys %{$deps->{$dep}})
+                {
+                    if (!$deps->{$file}->{$subdep})
+                    {
+                        $added = 1;
+                        $deps->{$file}->{$subdep} = 1;
+                    }
+                }
+            }
+        }
+    }
+} while ($added);
+
+for my $file (sort keys %$deps)
+{
+    if ($file =~ /\.cpp$/)
+    {
+        my $obj = $file;
+        $obj =~ s/\.cpp$/.o/s;
+        print "$obj: $file ".join(" ", sort keys %{$deps->{$file}})."\n";
+        print "\tg++ \$(CXXFLAGS) -c -o \$\@ \$\<\n";
+    }
+}