brlcad on #curl provided this patch (edited by me) since "configure will fail

looking for a C++ preprocessor on libtool-using projects" with the factory-
installed libtool version on Mac OS X.

diff --git a/configure.ac b/configure.ac
index 8c38e29e12ea910a3c886bd80fe1cc16e249bff3..778cfdf0d6628417c482e05e4ca30c6a8140cbad 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -118,12 +118,16 @@ AC_LIBTOOL_WIN32_DLL
 dnl skip libtool C++ and Fortran compiler checks
 m4_ifdef([AC_PROG_CXX], [m4_undefine([AC_PROG_CXX])])
 m4_defun([AC_PROG_CXX],[])
+m4_ifdef([AC_PROG_CXXCPP], [m4_undefine([AC_PROG_CXXCPP])])
+m4_defun([AC_PROG_CXXCPP],[true])
 m4_ifdef([AC_PROG_F77], [m4_undefine([AC_PROG_F77])])
 m4_defun([AC_PROG_F77],[])
 
 dnl skip libtool C++ and Fortran linker checks
 m4_ifdef([AC_LIBTOOL_CXX], [m4_undefine([AC_LIBTOOL_CXX])])
 m4_defun([AC_LIBTOOL_CXX],[])
+m4_ifdef([AC_LIBTOOL_CXXCPP], [m4_undefine([AC_LIBTOOL_CXXCPP])])
+m4_defun([AC_LIBTOOL_CXXCPP],[true])
 m4_ifdef([AC_LIBTOOL_F77], [m4_undefine([AC_LIBTOOL_F77])])
 m4_defun([AC_LIBTOOL_F77],[])