LP:576468 - Problem building --with-debug

I configured MariaDB with --with-debug=full, but I still get it building with "-O2", for example:

gcc -DHAVE_CONFIG_H -I. -I../include -I../include -I../include -g -g -O2 -D_P1003_1B_VISIBLE -DSIGNAL_WITH_VIO_CLOSE -DSIGNALS_DONT_BREAK_READ -DIGNORE_SIGHUP_SIGQUIT -DDONT_DECLARE_CXA_PURE_VIRTUAL -MT strxmov.o -MD -MP -MF .deps/strxmov.Tpo -c -o strxmov.o strxmov.c

It looks like AC_PROG_LIBTOOL sets:

CFLAGS = -g -O2
CXXFLAGS = -g -O2

This is the same with autoconf 2.63 on Mac and autoconf 2.59 on Linux.

MySQL 5.1.46 configure has the same problem.

Here is a quick patch which fixes the problem:

=== modified file 'configure.in'
— configure.in 2010-04-29 07:29:04 +0000
+++ configure.in 2010-05-06 15:41:15 +0000
@@ -15,6 +15,12 @@

1. first part and a 100 character second part.
   AM_INIT_AUTOMAKE([1.9 tar-ustar])
   AC_PROG_LIBTOOL
   +if test "$CFLAGS" = "-g -O2" ; then
   + CFLAGS=""
   +fi
   +if test "$CXXFLAGS" = "-g -O2" ; then
   + CXXFLAGS=""
   +fi

AM_CONFIG_HEADER([include/config.h])