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_libflac.m4

@@ -0,0 +1,72 @@
+dnl add audacity / flac license?
+dnl
+dnl Please increment the serial number below whenever you alter this macro
+dnl for the benefit of automatic macro update systems
+# audacity_checklib_libflac.m4 serial 2
+
+AC_DEFUN([AUDACITY_CHECKLIB_LIBFLAC], [
+
+   if false ; then
+      AC_DEFINE(USE_LIBFLAC, 1,
+                [Define if the FLAC library is present])
+   fi
+
+   AC_ARG_WITH(libflac,
+               [AS_HELP_STRING([--with-libflac],
+                               [use libFLAC for FLAC support])],
+               LIBFLAC_ARGUMENT=$withval,
+               LIBFLAC_ARGUMENT="unspecified")
+
+   dnl See if FLAC is installed in the system
+
+   AC_CHECK_LIB(FLAC,
+                FLAC__stream_decoder_new,
+                lib_found="yes",
+                lib_found="no",
+                -lFLAC++ -lFLAC)
+
+   AC_CHECK_HEADER(FLAC/format.h,
+                   header_found="yes",
+                   header_found="no")
+
+   if test "x$lib_found" = "xyes" && test "x$header_found" = "xyes" ; then
+      LIBFLAC_SYSTEM_AVAILABLE="yes"
+      LIBFLAC_SYSTEM_LIBS="-lFLAC++ -lFLAC"
+      LIBFLAC_SYSTEM_CPPSYMBOLS="USE_LIBFLAC"
+      # this file shouldn't be built at if no libflac is available
+      LIBFLAC_SYSTEM_OPTOBJS="ondemand/ODDecodeFlacTask.o"
+      AC_MSG_NOTICE([FLAC libraries are available as system libraries])
+   else
+      LIBFLAC_SYSTEM_AVAILABLE="no"
+      AC_MSG_NOTICE([FLAC/FLAC++ libraries are NOT available as system libraries])
+   fi
+
+   dnl see if FLAC is available in the source dir
+
+   AC_CHECK_FILE(${srcdir}/lib-src/libflac/include/FLAC/format.h,
+                 flac_h_available="yes",
+                 flac_h_available="no")
+
+   AC_CHECK_FILE(${srcdir}/lib-src/libflac/include/FLAC++/decoder.h,
+                 flacpp_h_available="yes",
+                 flacpp_h_available="no")
+
+   if test "x$flac_h_available" = "xyes" && test "x$flacpp_h_available" = "xyes" ; then
+      LIBFLAC_LOCAL_AVAILABLE="yes"
+
+      LIBFLAC_LOCAL_LIBS="libFLAC++.a libFLAC.a"
+
+      LIBFLAC_LOCAL_CXXFLAGS='-I$(top_srcdir)/lib-src/libflac/include'
+      LIBFLAC_LOCAL_CXXFLAGS="$LIBFLAC_LOCAL_CXXFLAGS -I\$(top_srcdir)/lib-src/libflac/include"
+
+      LIBFLAC_LOCAL_CPPSYMBOLS="USE_LIBFLAC"
+      # this file shouldn't be built at if no libflac is available
+      LIBFLAC_LOCAL_OPTOBJS="ondemand/ODDecodeFlacTask.o"
+      LIBFLAC_LOCAL_CONFIG_SUBDIRS="lib-src/libflac"
+	
+      AC_MSG_NOTICE([FLAC libraries are available in this source tree])
+   else
+      AC_MSG_NOTICE([FLAC libraries are NOT available in this source tree])
+   fi
+])
+