comprehensive checking for help2man and gengetopt

npa/configure.ac

@@ -27,9 +27,20 @@ AC_PROG_INSTALL
 AC_PROG_SED
 AM_PROG_CC_C_O
 PKG_PROG_PKG_CONFIG
-AC_PATH_PROG(HELP2MAN, help2man, false // No help2man //)
-AC_PATH_PROG(GENGETOPT, gengetopt, false // No gengetopt //)
-AC_PATH_PROG(GENGETOPT, doxygen, false // No gengetopt //)
+AC_ARG_VAR([HELP2MAN],
+           [absolute path to help2man used for man page generation of npa-tool])
+AC_PATH_PROG(HELP2MAN, help2man, not found)
+if test ! -r src/npa-tool.1 -a "${HELP2MAN}" = "not found"
+then
+    AC_MSG_ERROR([Need help2man to generate man page for npa-tool])
+fi
+AC_ARG_VAR([GENGETOPT],
+           [absolute path to gengetopt used for command line parsing of npa-tool])
+AC_PATH_PROG(GENGETOPT, gengetopt, not found)
+if test ! -r src/cmdline.h -a "${GENGETOPT}" = "not found"
+then
+    AC_MSG_ERROR([Need gengetopt for parsing command line of npa-tool])
+fi
 
 # If you need to see the details, just run make V=1.
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
@@ -125,6 +136,10 @@ OPENSSL_LIBS:         ${OPENSSL_LIBS}
 OPENPACE_CFLAGS:      ${OPENPACE_CFLAGS}
 OPENPACE_LIBS:        ${OPENPACE_LIBS}
 
+
+HELP2MAN:             ${HELP2MAN}
+GENGETOPT:            ${GENGETOPT}
+
 EOF
 
 AC_CONFIG_FILES([