build: allow building with sanitizer (#4594)

configure

@@ -711,6 +711,7 @@ ac_subst_files=''
 ac_user_opts='
 enable_option_checking
 enable_analyzer
+enable_sanitizer
 enable_apparmor
 enable_selinux
 enable_dbusproxy
@@ -1368,6 +1369,8 @@ Optional Features:
  --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
  --enable-FEATURE[=ARG] include FEATURE [ARG=yes]
  --enable-analyzer enable GCC static analyzer
+ --enable-sanitizer=[address | memory | undefined]
+ enable a compiler-based sanitizer (debug)
  --enable-apparmor enable apparmor
  --enable-selinux SELinux labeling support
  --disable-dbusproxy disable dbus proxy
@@ -3294,6 +3297,57 @@ if test "x$enable_analyzer" = "xyes"; then :
 
 fi
 
+# Check whether --enable-sanitizer was given.
+if test "${enable_sanitizer+set}" = set; then :
+ enableval=$enable_sanitizer;
+else
+ enable_sanitizer=no
+fi
+
+if test "x$enable_sanitizer" != "xno" ; then :
+ as_CACHEVAR=`$as_echo "ax_cv_check_cflags__-fsanitize=$enable_sanitizer" | $as_tr_sh`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -fsanitize=$enable_sanitizer" >&5
+$as_echo_n "checking whether C compiler accepts -fsanitize=$enable_sanitizer... " >&6; }
+if eval \${$as_CACHEVAR+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ ax_check_save_flags=$CFLAGS
+ CFLAGS="$CFLAGS -fsanitize=$enable_sanitizer"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ eval "$as_CACHEVAR=yes"
+else
+ eval "$as_CACHEVAR=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ CFLAGS=$ax_check_save_flags
+fi
+eval ac_res=\$$as_CACHEVAR
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+if eval test \"x\$"$as_CACHEVAR"\" = x"yes"; then :
+
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -fsanitize=$enable_sanitizer -fno-omit-frame-pointer"
+ EXTRA_LDFLAGS="$EXTRA_LDFLAGS -fsanitize=$enable_sanitizer"
+
+else
+ as_fn_error $? "sanitizer not supported: $enable_sanitizer" "$LINENO" 5
+
+fi
+
+fi
+
 HAVE_APPARMOR=""
 # Check whether --enable-apparmor was given.
 if test "${enable_apparmor+set}" = set; then :

configure.ac

@@ -45,6 +45,15 @@ AS_IF([test "x$enable_analyzer" = "xyes"], [
  EXTRA_CFLAGS="$EXTRA_CFLAGS -fanalyzer -Wno-analyzer-malloc-leak"
 ])
 
+AC_ARG_ENABLE([sanitizer],
+ AS_HELP_STRING([--enable-sanitizer=@<:@address | memory | undefined@:>@], [enable a compiler-based sanitizer (debug)]), [], [enable_sanitizer=no])
+AS_IF([test "x$enable_sanitizer" != "xno" ],
+ [AX_CHECK_COMPILE_FLAG([-fsanitize=$enable_sanitizer], [
+ EXTRA_CFLAGS="$EXTRA_CFLAGS -fsanitize=$enable_sanitizer -fno-omit-frame-pointer"
+ EXTRA_LDFLAGS="$EXTRA_LDFLAGS -fsanitize=$enable_sanitizer"
+ ], [AC_MSG_ERROR([sanitizer not supported: $enable_sanitizer])]
+)])
+
 HAVE_APPARMOR=""
 AC_ARG_ENABLE([apparmor],
  AS_HELP_STRING([--enable-apparmor], [enable apparmor]))