OPTIMIZER: use -O2 in optimized builds. Do not use -g (for now) in

debug builds because it would produce a huge executable.

config/dgux.mk

@@ -68,7 +68,12 @@ I2_LOCALE		= i2
 
 EMACS			= /bin/true
 PERL			= /usr/bin/perl
+ifdef BUILD_OPT
+OPTIMIZER		= -O2
+else
+# -g would produce a huge executable.
 OPTIMIZER		=
+endif
 
 ######################################################################
 # Other

nsprpub/config/dgux.mk

@@ -39,4 +39,9 @@ ARCH		= dgux
 
 NOSUCHFILE	= /no-such-file
 
+ifdef BUILD_OPT
+OPTIMIZER	= -O2
+else
+# -g would produce a huge executable.
 OPTIMIZER	=
+endif