check_cxx_source_compiles("
#if ${HAVE_PAM_PAM_APPL_H}+0
# include <pam/pam_appl.h>
#else
# include <security/pam_appl.h>
#endif

static int PAM_conv(
	int num_msg,
	const struct pam_message **msg, /* this is the culprit */
	struct pam_response **resp,
	void *ctx)
{
	return 0;
}

int main(void)
{
	struct pam_conv PAM_conversation = {
		&PAM_conv, /* this bombs out if the above does not match */
		0
	};

	return 0;
}
" PAM_MESSAGE_CONST)

check_cxx_source_compiles("
#if ${HAVE_PAM_PAM_APPL_H}+0
# include <pam/pam_appl.h>
#else
# include <security/pam_appl.h>
#endif
static int PAM_conv(
	int num_msg,
	const struct pam_message **msg, /* this is the culprit */
	struct pam_response **resp,
	void *ctx)
{
	return 0;
}
int main(void)
{
	struct pam_conv PAM_conversation = {
		&PAM_conv, /* this bombs out if the above does not match */
		0
	};
	return 0;
}
" PAM_MESSAGE_CONST)