--- libgig/trunk/configure.ac	2015/01/11 17:47:57	2698
+++ libgig/trunk/configure.ac	2021/02/14 13:38:43	3858
@@ -1,9 +1,9 @@
 #------------------------------------------------------------------------------------
 # Library's "official" release version:
 
-m4_define(libgig_release_major, 3)
-m4_define(libgig_release_minor, 3)
-m4_define(libgig_release_build, 0.svn25)
+m4_define(libgig_release_major, 4)
+m4_define(libgig_release_minor, 2)
+m4_define(libgig_release_build, 0.svn18)
 
 
 AC_INIT([libgig],[libgig_release_major.libgig_release_minor.libgig_release_build])
@@ -26,9 +26,9 @@
 #  6. If any interfaces have been removed since the last public release, then set age
 #     to 0.
 
-LIBGIG_LT_CURRENT=10
+LIBGIG_LT_CURRENT=9
 LIBGIG_LT_REVISION=0
-LIBGIG_LT_AGE=4
+LIBGIG_LT_AGE=0
 LIBGIG_SHARED_VERSION_INFO="$LIBGIG_LT_CURRENT:$LIBGIG_LT_REVISION:$LIBGIG_LT_AGE"
 
 LIBAKAI_LT_CURRENT=0
@@ -56,6 +56,12 @@
 AC_SUBST(LIBAKAI_RELEASE_MINOR, libakai_release_minor)
 AC_SUBST(LIBAKAI_RELEASE_BUILD, libakai_release_build)
 
+# make sure C++11 is supported by compiler
+# (add CXXFLAGS if required [e.g. -std=c++11])
+m4_ifdef([m4_include(m4/ax_cxx_compile_stdcxx.m4)],,
+             [sinclude([m4/ax_cxx_compile_stdcxx.m4])])
+AX_CXX_COMPILE_STDCXX(11, [], mandatory)
+
 have_audio_file_lib="false"
 
 # check for presence of libsndfile
@@ -86,6 +92,7 @@
 AC_CHECK_HEADERS(uuid/uuid.h)
 AC_SEARCH_LIBS(uuid_generate, uuid)
 AC_CHECK_FUNCS(uuid_generate)
+AC_CHECK_FUNCS(vasprintf)
 
 case "$host" in
     *mingw*|*cygwin*)
@@ -112,6 +119,7 @@
 *** libgig will not be able to create DLSIDs in DLS and gig files.
 *** Install libuuid from e2fsprogs to solve this. Package might be called
 *** uuid-dev, libext2fs2-devel or e2fsprogs-devel.])
+    exit -1;
 fi
 
 AC_CONFIG_HEADERS([config.h])
@@ -136,6 +144,7 @@
     man/gig2stereo.1 \
     man/rifftree.1 \
     man/sf2dump.1 \
+    man/sf2extract.1 \
     man/korgdump.1 \
     man/korg2gig.1 \
     man/akaidump.1 \