Locate and position the current Audacity source code, and clear a variety of old junk out of the way into junk-branches

m4/audacity_checklib_libnyquist.m4

@@ -0,0 +1,45 @@
+dnl add Audacity / Nyquist license?
+dnl Please increment the serial number below whenever you alter this macro
+dnl for the benefit of automatic macro update systems
+# audacity_checklib_libnyquist.m4 serial 1
+
+dnl Check for Nyquist as a library
+AC_DEFUN([AUDACITY_CHECKLIB_LIBNYQUIST], [
+   AC_ARG_ENABLE(nyquist,
+               [AS_HELP_STRING([--enable-nyquist],
+                               [enable Nyquist plug-in support [default=yes]])],
+               LIBNYQUIST_ARGUMENT=$enableval,
+               LIBNYQUIST_ARGUMENT="unspecified")
+
+   if false ; then
+      AC_DEFINE(USE_NYQUIST, 1,
+                [Define if Nyquist support should be enabled])
+   fi
+
+   dnl Nyquist is never installed on the system
+   dnl nyx is home-cooked by us, so system copy is unlikely
+   LIBNYQUIST_SYSTEM_AVAILABLE="no"
+
+   dnl see if Nyquist is available locally
+
+   AC_CHECK_FILE(${srcdir}/lib-src/libnyquist/nyx.h,
+                 nyx_h_found="yes",
+                 nyx_h_found="no")
+
+   if test "x$nyx_h_found" = "xyes" ; then
+      LIBNYQUIST_LOCAL_AVAILABLE="yes"
+      LIBNYQUIST_LOCAL_LIBS="libnyquist.a"
+      LIBNYQUIST_LOCAL_CXXFLAGS='-I$(top_srcdir)/lib-src/libnyquist'
+      LIBNYQUIST_LOCAL_CPPSYMBOLS="USE_NYQUIST"
+      LIBNYQUIST_LOCAL_OPTOBJS="effects/nyquist/Nyquist.o"
+      LIBNYQUIST_LOCAL_OPTOBJS="$LIBNYQUIST_LOCAL_OPTOBJS effects/nyquist/LoadNyquist.o"
+
+      LIBNYQUIST_LOCAL_CONFIG_SUBDIRS="lib-src/libnyquist"
+
+      AC_MSG_NOTICE([nyquist libraries are available in the local tree])
+   else
+      LIBNYQUIST_LOCAL_AVAILABLE="no"
+      AC_MSG_NOTICE([nyquist libraries are NOT available in the local tree])
+   fi
+])
+