WASM WIP link an executable

Use the newly introduced soffice.html.linkdeps from core to get the
recursive dependencies into the link command.

This currently fails due to some problem with POCO:
wasm-ld: error: --shared-memory is disallowed by AtomicCounter.o because it was not compiled with 'atomics' or 'bulk-memory' features.

Signed-off-by: Michael Stahl <michael.stahl@allotropia.de>
Change-Id: I76b0a2265f67e89f6992d556525f1263ad1b45db

configure.ac

@@ -1192,7 +1192,9 @@ else
 fi
 AC_SUBST(ENABLE_SUPPORT_KEY)
 
-LIBS="$LIBS -lPocoNetSSL${POCO_DEBUG_SUFFIX} -lPocoNet${POCO_DEBUG_SUFFIX} -lPocoUtil${POCO_DEBUG_SUFFIX} -lPocoJSON${POCO_DEBUG_SUFFIX} -lPocoXML${POCO_DEBUG_SUFFIX} -lPocoFoundation${POCO_DEBUG_SUFFIX} -lPocoCrypto${POCO_DEBUG_SUFFIX}"
+if test "$host_os" != "emscripten"; then
+    LIBS="$LIBS -lPocoNetSSL${POCO_DEBUG_SUFFIX} -lPocoNet${POCO_DEBUG_SUFFIX} -lPocoUtil${POCO_DEBUG_SUFFIX} -lPocoJSON${POCO_DEBUG_SUFFIX} -lPocoXML${POCO_DEBUG_SUFFIX} -lPocoFoundation${POCO_DEBUG_SUFFIX} -lPocoCrypto${POCO_DEBUG_SUFFIX}"
+fi
 
 AS_IF([test "$ENABLE_SSL" = "true"],
       [LIBS="$LIBS -lssl -lcrypto"])

wasm/Makefile.am

@@ -26,8 +26,7 @@ libonline_a_SOURCES = \
 	../wsd/COOLWSD.cpp \
 	../wsd/RequestDetails.cpp \
 	../wsd/Storage.cpp \
-	../wsd/TileCache.cpp \
-	wasmapp.cpp
+	../wsd/TileCache.cpp
 
 AM_CPPFLAGS = \
 	-I$(top_srcdir) \
@@ -40,3 +39,26 @@ AM_CPPFLAGS = \
 	-DCOOLWSD_CONFIGDIR='"@COOLWSD_CONFIGDIR@"' \
 	-DMOBILEAPP=1
 
+bin_PROGRAMS = online
+
+online_SOURCES = wasmapp.cpp
+
+online_DEPENDENCIES = \
+	libonline.a
+
+# note cannot add .linkdeps to DEPENDENCIES because it contains -lFoo
+online_LDADD = \
+	libonline.a \
+	${POCOLIB}/libPocoEncodings@POCODEBUG@.a \
+	${POCOLIB}/libPocoNet@POCODEBUG@.a \
+	${POCOLIB}/libPocoUtil@POCODEBUG@.a \
+	${POCOLIB}/libPocoXML@POCODEBUG@.a \
+	${POCOLIB}/libPocoJSON@POCODEBUG@.a \
+	${POCOLIB}/libPocoFoundation@POCODEBUG@.a \
+	${ZSTDLIB}/libzstd.a \
+	-L@LOBUILDDIR@/instdir/program \
+	$(shell cat @LOBUILDDIR@/instdir/program/soffice.html.linkdeps)
+
+# TODO these are just copypasta from core
+online_LDFLAGS = \
+	-pthread -s USE_PTHREADS=1 -s TOTAL_MEMORY=1GB -s PTHREAD_POOL_SIZE=4 --bind -s FORCE_FILESYSTEM=1 -s WASM_BIGINT=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s FETCH=1 -s ASSERTIONS=1 -s EXIT_RUNTIME=0 -s EXPORTED_RUNTIME_METHODS=["UTF16ToString","stringToUTF16","UTF8ToString","allocateUTF8","printErr","ccall","cwrap","FS"] -pthread -s USE_PTHREADS=1 -s DISABLE_EXCEPTION_CATCHING=0 -s EXPORTED_FUNCTIONS=["_main","_libreofficekit_hook","_libreofficekit_hook_2","_lok_preinit","_lok_preinit_2","_doc_postUnoCommand"]