autoconf magic for compile_et/libcom_err

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@10581 ec53bebd-3082-4978-b11e-865c3cabbd6b

cf/check-compile-et.m4

@@ -0,0 +1,58 @@
+dnl $Id$
+dnl
+dnl CHECK_COMPILE_ET
+AC_DEFUN([CHECK_COMPILE_ET], [
+
+AC_CHECK_PROG(COMPILE_ET, compile_et, [compile_et])
+
+krb_cv_compile_et="no"
+if test "${ac_cv_prog_COMPILE_ET}" = "compile_et"; then
+
+dnl We have compile_et.  Now let's see if it supports `prefix' and `index'.
+AC_MSG_CHECKING(compile_et features)
+cat > conftest.et <<'EOF'
+error_table conf
+prefix CONFTEST
+error_code CODE1, "CODE1"
+index 128
+error_code CODE2, "CODE2"
+end
+EOF
+if ${ac_cv_prog_COMPILE_ET} conftest.et >/dev/null 2>&1; then
+	AC_MSG_RESULT(enough)
+        krb_cv_compile_et="yes"
+else
+	AC_MSG_RESULT(insufficient)
+fi
+rm -fr conftest*
+
+else
+dnl We don't have compile_et, so we'll need to build our own.
+ac_cv_prog_COMPILE_ET="\$(top_builddir)/lib/com_err/compile_et"
+COMPILE_ET="${ac_cv_prog_COMPILE_ET}"
+fi
+
+AC_CHECK_LIB(com_err, error_message,
+  [krb_cv_com_err="yes"],
+  [krb_cv_com_err="no"])
+
+dnl Only use the system's compile_et or libcom_err if we have them both.
+if test "${krb_cv_compile_et}" = "yes" && \
+   test "${krb_cv_com_err}" = "yes"; then
+    DIR_com_err=""
+    LIB_com_err="-lcom_err"
+    LIB_com_err_a=""
+    LIB_com_err_so=""
+else
+    DIR_com_err="com_err"
+    LIB_com_err="\$(top_builddir)/lib/com_err/libcom_err.la"
+    LIB_com_err_a="\$(top_builddir)/lib/com_err/.libs/libcom_err.a"
+    LIB_com_err_so="\$(top_builddir)/lib/com_err/.libs/libcom_err.so"
+fi
+AC_SUBST(COMPILE_ET)
+AC_SUBST(DIR_com_err)
+AC_SUBST(LIB_com_err)
+AC_SUBST(LIB_com_err_a)
+AC_SUBST(LIB_com_err_so)
+
+])