Merged revisions 217074 via svnmerge from

https://origsvn.digium.com/svn/asterisk/trunk

........
  r217074 | kpfleming | 2009-09-08 11:37:28 -0500 (Tue, 08 Sep 2009) | 9 lines
  
  Ensure that the default autoconf CFLAGS are not used.
  
  A recent change to the configure script that allows the user to specify
  CFLAGS and/or LDFLAGS to the script had the unfortunate side effect of
  letting autoconf's default CFLAGS (-g -O2) feed in to the rest of the build
  system, thereby overriding the DONT_OPTIMIZE setting in menuselect. That
  problem is now corrected.
........


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.6.2@217077 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 11 insertions, 5 deletions

diff --git a/configure.ac b/configure.ac
index acfba034e..62597f984 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,20 +17,26 @@ AC_CANONICAL_HOST
 # check existence of the package
 AC_CONFIG_SRCDIR([main/asterisk.c])
 
-# specify output header file
-AC_CONFIG_HEADER(include/asterisk/autoconfig.h)
-
 AC_COPYRIGHT("Asterisk")
 AC_REVISION($Revision$)
 
-AC_USE_SYSTEM_EXTENSIONS	# note- does not work on FreeBSD
-
 # preserve any CFLAGS or LDFLAGS that may be set
+# NOTE: This must be done before calling any macros that end up
+# calling AC_PROG_CC or the like, since they will set a default
+# set of CFLAGS ("-g -O2") if the user did not supply any, and
+# we don't want those default flags to be carried over into the
+# rest of the build system since we have other means of controlling
+# debugging symbol generation and optimization.
 CONFIG_CFLAGS="${CFLAGS}"
 CONFIG_LDFLAGS="${LDFLAGS}"
 AC_SUBST(CONFIG_CFLAGS)
 AC_SUBST(CONFIG_LDFLAGS)
 
+# specify output header file
+AC_CONFIG_HEADER(include/asterisk/autoconfig.h)
+
+AC_USE_SYSTEM_EXTENSIONS	# note- does not work on FreeBSD
+
 case "${host_os}" in
      freebsd*)
      ac_default_prefix=/usr/local