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diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 009155ee..797604af 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -3081,6 +3081,21 @@ uts4*)
shlibpath_var=LD_LIBRARY_PATH
;;
+emscripten*)
+ version_type=none
+ need_lib_prefix=no
+ need_version=no
+ library_names_spec='$libname$release$shared_ext'
+ soname_spec='$libname$release$shared_ext'
+ finish_cmds=
+ dynamic_linker="Emscripten linker"
+ _LT_COMPILER_PIC($1)='-fPIC'
+ _LT_TAGVAR(archive_cmds, $1)='$CC -sSIDE_MODULE=2 -shared $libobjs $deplibs $compiler_flags -o $lib'
+ _LT_TAGVAR(archive_expsym_cmds, $1)='$SED "s|^|_|" $export_symbols >$output_objdir/$soname.expsym~$CC -sSIDE_MODULE=2 -shared $libobjs $deplibs $compiler_flags -o $lib -s EXPORTED_FUNCTIONS=@$output_objdir/$soname.expsym'
+ _LT_TAGVAR(archive_cmds_need_lc, $1)=no
+ _LT_TAGVAR(no_undefined_flag, $1)=
+ ;;
+
*)
dynamic_linker=no
;;