WASM: add initial support for Emscripten cross build

- configure with:
- --host=wasm64-local-emscripten
- had to make a few externals optional, so adding:
  - --disable-nss
  - --disable-cmis
  - --disable-curl

Change-Id: I48d1c73d2675ad2e2beaf2c341578199efbd24ee
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/111130
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>

2 files changed, 39 insertions, 13 deletions

diff --git a/xmlsecurity/Library_xsec_xmlsec.mk b/xmlsecurity/Library_xsec_xmlsec.mk
index bd2cb6abef20..450e19b3267b 100644
--- a/xmlsecurity/Library_xsec_xmlsec.mk
+++ b/xmlsecurity/Library_xsec_xmlsec.mk
@@ -51,7 +51,7 @@ endif
 
 $(eval $(call gb_Library_use_externals,xsec_xmlsec,\
 	boost_headers \
-	gpgmepp \
+	$(if $(ENABLE_GPGMEPP),gpgmepp) \
 	libxml2 \
 	xmlsec \
 ))
@@ -65,9 +65,6 @@ $(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
 	xmlsecurity/source/xmlsec/xmlelementwrapper_xmlsecimpl \
 	xmlsecurity/source/xmlsec/xmlsec_init \
 	xmlsecurity/source/xmlsec/xmlstreamio \
-	xmlsecurity/source/xmlsec/nss/ciphercontext \
-	xmlsecurity/source/xmlsec/nss/digestcontext \
-	xmlsecurity/source/xmlsec/nss/nssinitializer \
 ))
 
 ifeq ($(ENABLE_GPGMEPP),TRUE)
@@ -110,24 +107,36 @@ $(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
 	xmlsecurity/source/xmlsec/mscrypt/xmlsignature_mscryptimpl \
 ))
 
-else
+ifeq ($(ENABLE_NSS),TRUE)
 
-$(eval $(call gb_Library_add_defs,xsec_xmlsec,\
-	-DXMLSEC_CRYPTO_NSS \
+$(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
+	xmlsecurity/source/xmlsec/nss/ciphercontext \
+	xmlsecurity/source/xmlsec/nss/digestcontext \
+	xmlsecurity/source/xmlsec/nss/nssinitializer \
 ))
 
+# nss3 after static libs to appease --as-needed linkers
+$(eval $(call gb_Library_use_externals,xsec_xmlsec,\
+	nss3 \
+))
+
+endif
+
+else # !$(OS),WNT
+
 ifeq ($(SYSTEM_XMLSEC),)
 $(eval $(call gb_Library_add_libs,xsec_xmlsec,\
-	$(call gb_UnpackedTarball_get_dir,xmlsec)/src/nss/.libs/libxmlsec1-nss.a \
-	$(call gb_UnpackedTarball_get_dir,xmlsec)/src/.libs/libxmlsec1.a \
+       $(call gb_UnpackedTarball_get_dir,xmlsec)/src/nss/.libs/libxmlsec1-nss.a \
+       $(call gb_UnpackedTarball_get_dir,xmlsec)/src/.libs/libxmlsec1.a \
 ))
 endif
 
-$(eval $(call gb_Library_use_externals,xsec_xmlsec,\
-	plc4 \
-))
+ifeq ($(ENABLE_NSS),TRUE)
 
 $(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
+	xmlsecurity/source/xmlsec/nss/ciphercontext \
+	xmlsecurity/source/xmlsec/nss/digestcontext \
+	xmlsecurity/source/xmlsec/nss/nssinitializer \
 	xmlsecurity/source/xmlsec/nss/sanextension_nssimpl \
 	xmlsecurity/source/xmlsec/nss/secerror \
 	xmlsecurity/source/xmlsec/nss/securityenvironment_nssimpl \
@@ -137,17 +146,32 @@ $(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
 	xmlsecurity/source/xmlsec/nss/xmlsignature_nssimpl \
 ))
 
-endif
+$(eval $(call gb_Library_add_defs,xsec_xmlsec,\
+	-DXMLSEC_CRYPTO_NSS \
+))
 
+$(eval $(call gb_Library_use_externals,xsec_xmlsec,\
+	plc4 \
+))
 # nss3 after static libs to appease --as-needed linkers
 $(eval $(call gb_Library_use_externals,xsec_xmlsec,\
 	nss3 \
 ))
 
+else # ! $(ENABLE_NSS)
+
+ifeq ($(ENABLE_OPENSSL),TRUE)
+$(eval $(call gb_Library_use_external,xsec_xmlsec,openssl))
+endif
+
+endif # !$(ENABLE_NSS)
+
 ifeq ($(OS),SOLARIS)
 $(eval $(call gb_Library_add_libs,xsec_xmlsec,\
 	-ldl \
 ))
 endif
 
+endif # !$(OS),WNT
+
 # vim: set noet sw=4 ts=4:
diff --git a/xmlsecurity/inc/pch/precompiled_xsec_xmlsec.hxx b/xmlsecurity/inc/pch/precompiled_xsec_xmlsec.hxx
index 31365ab4bb53..3ed7749687d1 100644
--- a/xmlsecurity/inc/pch/precompiled_xsec_xmlsec.hxx
+++ b/xmlsecurity/inc/pch/precompiled_xsec_xmlsec.hxx
@@ -33,7 +33,9 @@
 #include <memory>
 #include <new>
 #include <ostream>
+#ifdef XMLSEC_CRYPTO_NSS
 #include <pk11pub.h>
+#endif
 #include <stddef.h>
 #include <string.h>
 #include <string>