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# We need to be careful to avoid having the reference to
# program_invocation_name optimized out. We do that by
# returning the value.
AC_DEFUN([AC_PROGRAM_INVOCATION_NAME],
[AC_CACHE_CHECK(
for program_invocation_name,
ac_cv_have_program_invocation_name,
AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern char* program_invocation_name;]], [[return *program_invocation_name;]])],[ac_cv_have_program_invocation_name=yes],[ac_cv_have_program_invocation_name=no])
)
if test "$ac_cv_have_program_invocation_name" = "yes"; then
AC_DEFINE(HAVE_PROGRAM_INVOCATION_NAME, 1,
[define if libc has program_invocation_name])
fi
])
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