added --enable-asan-support for Google's Address Sanitizer compiler flags

ChangeLog

@@ -8,6 +8,9 @@ fwknop-2.6.6 (02//2015):
     - [test suite] Handle versions of lcov that don't have the --rc argument
       which is normally used to force the creation branch coverage stats when
       code coverage reports are created.
+    - [build] Add --enable-asan-support to autoconf configure script to enable
+      Google's Address Sanitizer (ASan) support. This feature is used during
+      the testing phase for new fwknop releases.
 
 fwknop-2.6.5 (12/16/2014):
     - [server] (Grant Pannell) Added a new access.conf variable "DESTINATION"

configure.ac

@@ -170,6 +170,19 @@ fi
 
 AM_CONDITIONAL([WANT_C_UNIT_TESTS], [test "$want_c_unit_tests" = yes])
 
+dnl Decide whether or not to enable address sanitizer support
+dnl
+want_asan_support=no
+AC_ARG_ENABLE([asan-support],
+  [AS_HELP_STRING([--enable-asan-support],
+    [Build fwknop binaries with address sanitizer support @<:@default is to disable@:>@])],
+  [want_asan_support=$enableval],
+  [])
+
+if test "x$want_asan_support" = "xyes"; then
+    FKO_CHECK_COMPILER_ARG([-fsanitize=address -fno-omit-frame-pointer])
+fi
+
 dnl Decide whether or not to compile in certain features that enable fuzzing
 dnl of fwknop code - this is for testing purposes only.
 dnl