dpkg-buildflags support

* dh_auto_build, dh_auto_configure, dh: Set environment variables
  listed by dpkg-buildflags --export. Any environment variables that
  are already set to other values will not be changed.
  Closes: #544844
* Also, support DEB_BUILD_OPTIONS=noopt, by changing -O2 to -O0.

1 files changed, 4 insertions, 1 deletions

diff --git a/dh b/dh
index 50e0f14d..7c53611a 100755
--- a/dh
+++ b/dh
@@ -273,6 +273,9 @@ that is in the specified sequence. It then continues with the next command
 in the sequence. The B<--until>, B<--before>, B<--after>, and B<--remaining>
 options can override this behavior.
 
+B<dh> sets environment variables listed by B<dpkg-buildflags>, unless
+they are already set. It supports DEB_BUILD_OPTIONS=noopt too.
+
 B<dh> uses the B<DH_INTERNAL_OPTIONS> environment variable to pass information
 through to debhelper commands that are run inside override targets. The
 contents (and indeed, existence) of this environment variable, as the name
@@ -310,7 +313,7 @@ init(options => {
 	bundling => 0,
 );
 inhibit_log();
-
+set_buildflags();
 
 # If make is using a jobserver, but it is not available
 # to this process, clean out MAKEFLAGS. This avoids