1 files changed, 87 insertions, 0 deletions
diff --git a/erts/emulator/utils/make_compiler_flags b/erts/emulator/utils/make_compiler_flags
new file mode 100755
index 0000000000..cebe8cd0c5
--- /dev/null
+++ b/erts/emulator/utils/make_compiler_flags
@@ -0,0 +1,87 @@
+#!/usr/bin/env perl
+#
+# %CopyrightBegin%
+#
+# Copyright Ericsson AB 1999-2009. All Rights Reserved.
+#
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+#
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+#
+# %CopyrightEnd%
+#
+use strict;
+use File::Copy;
+# This program generates global constants that contains
+# config.h, CFLAGS and LDFLAGS
+
+my $file = "";
+my %constants = ();
+my $prev_file = "";
+
+while (@ARGV) {
+    my $d = shift;
+    if ( $d =~ /^-o$/ ) {
+	$file = shift or die("-o requires argument");
+	open FILE, "<$file" or next;
+	$prev_file = do { local $/; <FILE> };
+	close FILE;
+	next;
+    }
+    if ( $d =~ /^-f/ ) {
+	my $var = shift or die("-f requires two argument");
+	my $value = shift or die("-f requires two argument");
+	open FILE, "<$value";
+	$value = do { local $/; <FILE> };
+	close FILE;
+
+	$value =~ s/\n/\\n\\\n/g;
+
+	$constants{$var} = $value;
+    }
+    if ( $d =~ /^-v/ ) {
+	my $var = shift or die("-v requires two argument");
+	my $value = shift;
+	$constants{$var} = $value;
+    }
+}
+
+foreach(keys %constants) {
+    my $value = $constants{$_};
+    $value =~ s/"/\\"/g;
+    $constants{$_} = $value
+}
+
+# Did we want output to a file?
+open(my $oldout, ">&STDOUT")     or die "Can't dup STDOUT: $!";
+if ( $file ) {
+    open STDOUT, ">$file.tmp" or die("can't open $file for writing");
+}
+
+my(@prog) = split('/', $0);
+my($prog) = $prog[$#prog];
+print "/* Warning: Do not edit this file.\n";
+print "   Auto-generated by '$prog'.*/\n";
+
+foreach(keys %constants) {
+    print "const char* erts_build_flags_$_ = \"$constants{$_}\";\n"
+}
+
+open(STDOUT, ">&", $oldout) or die "Can't dup \$oldout: $!";
+
+open FILE, "<$file.tmp";
+my $new_file = do { local $/; <FILE> };
+close FILE;
+
+if ($new_file ne $prev_file) {
+    move("$file.tmp","$file");
+} else {
+    unlink("$file.tmp");
+}