Move compiler flags to configure and add -O2 as a minimum default flag.

ChangeLog

@@ -23,6 +23,8 @@ consistent with CFLAGS.
 each rzip chunk and compressed block.
 * Modify purpose of -T threshold option to mean Disable LZO pre-compression
  testing. Threshold level test deprecated.
+* Make failure to allocate a buffer in the compress_ functions put out an
+error message always rather than just in max_verbose mode.
 
 FEBRUARY 2011, Peter Hyman
 * Minor updates to man pages, lrzip.conf example file.

Makefile.in

@@ -18,8 +18,8 @@ LIBS=@LIBS@
 LDFLAGS=@LDFLAGS@
 CC=@CC@
 CXX=@CXX@
-CFLAGS=@CFLAGS@ -I. -I$(srcdir) -c -s
-CXXFLAGS=@CXXFLAGS@ -I. -I$(srcdir) -c -s -Wall -W
+CFLAGS=@CFLAGS@ -I. -I$(srcdir) -c
+CXXFLAGS=@CXXFLAGS@ -I. -I$(srcdir) -c
 LZMA_CFLAGS=-I@top_srcdir@/lzma/C -DCOMPRESS_MF_MT -D_REENTRANT
 
 INSTALLCMD=@INSTALL@

configure

@@ -3871,7 +3871,8 @@ fi
 
 
 if test x"$GCC" = xyes; then
-        CFLAGS="$CFLAGS -Wall -W"
+        CFLAGS="-Wall -W -s -O2 $CFLAGS"
+        CXXFLAGS="-Wall -W -s -O2 $CXXFLAGS"
 fi
 
 ac_ext=c

configure.ac

@@ -26,7 +26,8 @@ AC_SUBST(SHELL)
 AC_SYS_LARGEFILE
 
 if test x"$GCC" = xyes; then
-        CFLAGS="$CFLAGS -Wall -W"
+        CFLAGS="-Wall -W -s -O2 $CFLAGS"
+        CXXFLAGS="-Wall -W -s -O2 $CXXFLAGS"
 fi
 
 AC_CHECK_HEADERS(fcntl.h sys/time.h sys/unistd.h unistd.h)