Merge pull request #96 from burghardt/poco_unbundled_check

If Poco/XML/expat.h unavailable set POCO_UNBUNDLED to 1.

.github/workflows/docker.yml

@@ -27,14 +27,13 @@ jobs:
         uses: ./.github/actions/build-ubuntu-rolling
       - name: debian-unstable
         uses: ./.github/actions/build-debian-unstable
-      # E: Unable to locate package libpoco-dev
-      #- name: debian-testing
-      #  uses: ./.github/actions/build-debian-testing
+      - name: debian-testing
+        uses: ./.github/actions/build-debian-testing
       - name: debian-stable
         uses: ./.github/actions/build-debian-stable
       - name: debian-oldstable
         uses: ./.github/actions/build-debian-oldstable
-      # fatal error: Poco/XML/expat.h: No such file or directory
+      # rawhide is disabled because it cannot install dependencies
       #- name: fedora-rawhide
       #  uses: ./.github/actions/build-fedora-rawhide
       - name: fedora-latest

configure.ac

@@ -71,6 +71,7 @@ AC_CHECK_HEADER(Poco/ExpireLRUCache.h,,AC_MSG_ERROR([Poco/ExpireLRUCache.h not f
 AC_CHECK_HEADER(Poco/Net/MailMessage.h,,AC_MSG_ERROR([Poco/Net/MailMessage.h]))
 AC_CHECK_HEADER(Poco/Net/MailRecipient.h,,AC_MSG_ERROR([Poco/Net/MailRecipient.h]))
 AC_CHECK_HEADER(Poco/Net/SMTPClientSession.h,,AC_MSG_ERROR([Poco/Net/SMTPClientSession.h]))
+AC_CHECK_HEADER(Poco/XML/expat.h,,AC_DEFINE([POCO_UNBUNDLED],[1],[Set to 1 if you prefer system dependencies instead of components bundled with the `POCO` library.]))
 AC_CHECK_HEADER(Poco/SAX/SAXParser.h,,AC_MSG_ERROR([Poco/SAX/SAXParser.h]))
 AC_CHECK_HEADER(Poco/SAX/ContentHandler.h,,AC_MSG_ERROR([Poco/SAX/ContentHandler.h]))
 AC_CHECK_HEADER(Poco/SAX/LexicalHandler.h,,AC_MSG_ERROR([Poco/SAX/LexicalHandler.h]))