m4/pdns_init_auto_vars.m4

   1 dnl
   2 dnl Check for support for enabling initialization of automatic variables
   3 dnl
   4
   5 AC_DEFUN([PDNS_INIT_AUTO_VARS],[
   6   AC_MSG_CHECKING([whether to enable initialization of automatic variables])
   7   AC_ARG_ENABLE([auto-var-init],
   8     AS_HELP_STRING([--enable-auto-var-init],[enable initialization of automatic variables (zero, pattern) @<:@default=no@:>@]),
   9     [enable_initautovars=$enableval],
  10     [enable_initautovars=no],
  11   )
  12   AC_MSG_RESULT([$enable_initautovars])
  13
  14   AS_IF([test "x$enable_initautovars" = "xyes"], [
  15     [enable_initautovars=zero]
  16   ])
  17
  18   AS_IF([test "x$enable_initautovars" = "xzero" ], [
  19     gl_COMPILER_OPTION_IF([-ftrivial-auto-var-init=zero], [
  20       CFLAGS="-ftrivial-auto-var-init=zero $CFLAGS"
  21       CXXFLAGS="-ftrivial-auto-var-init=zero $CXXFLAGS"
  22     ])
  23   ])
  24
  25   AS_IF([test "x$enable_initautovars" = "xpattern" ], [
  26     gl_COMPILER_OPTION_IF([-ftrivial-auto-var-init=pattern], [
  27       CFLAGS="-ftrivial-auto-var-init=pattern $CFLAGS"
  28       CXXFLAGS="-ftrivial-auto-var-init=pattern $CXXFLAGS"
  29     ])
  30   ])
  31 ])