libtool: add support for wasm32-emscripten
This patch adds support for emscripten compiler for shared compilation.
* build-aux/ltmain.in: clone link-mode handling for emscripten from
unixware7.
* m4/libtool.m4: translate emscripten specific flags for shared module
building.
diff --git a/build-aux/ltmain.in b/build-aux/ltmain.in
index a4fa628..fa15777 100644
--- a/build-aux/ltmain.in
+++ b/build-aux/ltmain.in
@@ -6571,6 +6571,7 @@
case $host in
*-*-sco3.2v5.0.[024]*) add_dir=-L$dir ;;
*-*-sysv4*uw2*) add_dir=-L$dir ;;
+ *-*-emscripten*) add_dir=-L$dir ;;
*-*-sysv5OpenUNIX* | *-*-sysv5UnixWare7.[01].[10]* | \
*-*-unixware7*) add_dir=-L$dir ;;
*-*-darwin* )
diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 1a9bedc..628cdc9 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -3195,6 +3195,21 @@
shlibpath_var=LD_LIBRARY_PATH
;;
+emscripten*)
+ version_type=none
+ need_lib_prefix=no
+ need_version=no
+ library_names_spec='$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
;;
