disable http3 demo on windows

The external nghttp3 library seems to have a linking issue on windows
(several missing symbols).  Disable that build in windows for now until
its fixed

Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
(Merged from https://github.com/openssl/openssl/pull/24047)

3 files changed, 22 insertions, 16 deletions

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e4e303dc6b..b8b8f2ec3c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -83,7 +83,7 @@ jobs:
       run: sudo locale-gen tr_TR.UTF-8
     - name: config
       # enable-quic is on by default, but we leave it here to check we're testing the explicit enable somewhere
-      run: CC=gcc ./config --banner=Configured enable-demos enable-fips enable-quic --strict-warnings && perl configdata.pm --dump
+      run: CC=gcc ./config --banner=Configured enable-demos enable-h3demo enable-fips enable-quic --strict-warnings && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -105,7 +105,7 @@ jobs:
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
     - name: config
-      run: CC=clang ./config --banner=Configured enable-demos no-fips --strict-warnings && perl configdata.pm --dump
+      run: CC=clang ./config --banner=Configured enable-demos enable-h3demo no-fips --strict-warnings && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -152,7 +152,7 @@ jobs:
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
     - name: config
-      run: ./config --banner=Configured --strict-warnings enable-demos no-bulk no-pic no-asm -DOPENSSL_NO_SECURE_MEMORY -DOPENSSL_SMALL_FOOTPRINT && perl configdata.pm --dump
+      run: ./config --banner=Configured --strict-warnings enable-demos enable-h3demo no-bulk no-pic no-asm -DOPENSSL_NO_SECURE_MEMORY -DOPENSSL_SMALL_FOOTPRINT && perl configdata.pm --dump
     - name: make
       run: make -j4 # verbose, so no -s here
     - name: get cpu info
@@ -175,7 +175,7 @@ jobs:
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
     - name: config
-      run: ./config --banner=Configured --strict-warnings enable-demos no-deprecated enable-fips && perl configdata.pm --dump
+      run: ./config --banner=Configured --strict-warnings enable-demos enable-h3demo no-deprecated enable-fips && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -197,7 +197,7 @@ jobs:
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
     - name: config
-      run: ./config --banner=Configured --strict-warnings enable-demos no-shared no-fips && perl configdata.pm --dump
+      run: ./config --banner=Configured --strict-warnings enable-demos enable-h3demo no-shared no-fips && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -224,7 +224,7 @@ jobs:
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
     - name: config
-      run: ./config --banner=Configured --strict-warnings enable-demos no-shared no-fips && perl configdata.pm --dump
+      run: ./config --banner=Configured --strict-warnings enable-demos enable-h3demo no-shared no-fips && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -250,7 +250,7 @@ jobs:
         sudo cat /proc/sys/vm/mmap_rnd_bits
         sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
-      run: ./config --banner=Configured --debug enable-demos enable-asan enable-ubsan no-cached-fetch no-fips no-dtls no-tls1 no-tls1-method no-tls1_1 no-tls1_1-method no-async && perl configdata.pm --dump
+      run: ./config --banner=Configured --debug enable-demos enable-h3demo enable-asan enable-ubsan no-cached-fetch no-fips no-dtls no-tls1 no-tls1-method no-tls1_1 no-tls1_1-method no-async && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -276,7 +276,7 @@ jobs:
         sudo cat /proc/sys/vm/mmap_rnd_bits
         sudo sysctl -w vm.mmap_rnd_bits=28
     - name: config
-      run: ./config --banner=Configured --debug enable-demos enable-asan enable-ubsan enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-fips && perl configdata.pm --dump
+      run: ./config --banner=Configured --debug enable-demos enable-h3demo enable-asan enable-ubsan enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-fips && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -380,7 +380,7 @@ jobs:
     - name: modprobe tls
       run: sudo modprobe tls
     - name: config
-      run: ./config --banner=Configured --strict-warnings enable-demos no-ec enable-ssl-trace enable-zlib enable-zlib-dynamic enable-crypto-mdebug enable-egd enable-ktls enable-fips no-threads && perl configdata.pm --dump
+      run: ./config --banner=Configured --strict-warnings enable-demos enable-h3demo no-ec enable-ssl-trace enable-zlib enable-zlib-dynamic enable-crypto-mdebug enable-egd enable-ktls enable-fips no-threads && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -410,7 +410,7 @@ jobs:
     - name: install extra config support
       run: sudo apt-get -y install libsctp-dev abigail-tools libzstd-dev zstd
     - name: config
-      run: ./config --banner=Configured --strict-warnings enable-demos enable-ktls enable-fips enable-egd enable-ec_nistp_64_gcc_128 enable-md2 enable-rc5 enable-sctp enable-ssl3 enable-ssl3-method enable-trace enable-zlib enable-zstd && perl configdata.pm --dump
+      run: ./config --banner=Configured --strict-warnings enable-demos enable-h3demo enable-ktls enable-fips enable-egd enable-ec_nistp_64_gcc_128 enable-md2 enable-rc5 enable-sctp enable-ssl3 enable-ssl3-method enable-trace enable-zlib enable-zstd && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -432,7 +432,7 @@ jobs:
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
     - name: config
-      run: ./config --banner=Configured --strict-warnings enable-demos no-legacy enable-fips && perl configdata.pm --dump
+      run: ./config --banner=Configured --strict-warnings enable-demos enable-h3demo no-legacy enable-fips && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -454,7 +454,7 @@ jobs:
     - name: checkout fuzz/corpora submodule
       run: git submodule update --init --depth 1 fuzz/corpora
     - name: config
-      run: ./config --banner=Configured -Werror --debug no-afalgeng enable-demos no-shared enable-crypto-mdebug enable-rc5 enable-md2 enable-ssl3 enable-ssl3-method enable-weak-ssl-ciphers enable-zlib enable-ec_nistp_64_gcc_128 no-fips && perl configdata.pm --dump
+      run: ./config --banner=Configured -Werror --debug no-afalgeng enable-demos enable-h3demo no-shared enable-crypto-mdebug enable-rc5 enable-md2 enable-ssl3 enable-ssl3-method enable-weak-ssl-ciphers enable-zlib enable-ec_nistp_64_gcc_128 no-fips && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: get cpu info
@@ -491,7 +491,7 @@ jobs:
         mkdir ./install
     - name: config
       run: |
-        ../source/config --banner=Configured enable-demos enable-fips enable-quic enable-acvp-tests --strict-warnings --prefix=$(cd ../install; pwd)
+        ../source/config --banner=Configured enable-demos enable-h3demo enable-fips enable-quic enable-acvp-tests --strict-warnings --prefix=$(cd ../install; pwd)
         perl configdata.pm --dump
       working-directory: ./build
     - name: make
@@ -536,7 +536,7 @@ jobs:
         mkdir ./install
     - name: config
       run: |
-        ../source/config --banner=Configured enable-fips enable-demos enable-quic enable-acvp-tests --strict-warnings --prefix=$(cd ../install; pwd)
+        ../source/config --banner=Configured enable-fips enable-demos enable-h3demo enable-quic enable-acvp-tests --strict-warnings --prefix=$(cd ../install; pwd)
         perl configdata.pm --dump
       working-directory: ./build
     - name: make
diff --git a/Configure b/Configure
index 3c3909cfe5..cef9e8c3e6 100755
--- a/Configure
+++ b/Configure
@@ -79,6 +79,8 @@ EOF
 #               support isn't compiled.
 #
 # enable-demos  Enable the building of the example code in the demos directory
+# enable-h3demo Enable the http3 demo, which currently only links to the
+#               external nghttp3 library on unix platforms
 # no-hw         do not compile support for any crypto hardware.
 # [no-]threads  [don't] try to create a library that is suitable for
 #               multithreaded applications (default is "threads" if we
@@ -446,6 +448,7 @@ my @disablables = (
     "ct",
     "default-thread-pool",
     "demos",
+    "h3demo",
     "deprecated",
     "des",
     "devcryptoeng",
@@ -574,6 +577,7 @@ our %disabled = ( # "what"         => "comment"
                   "crypto-mdebug"       => "default",
                   "crypto-mdebug-backtrace" => "default",
                   "demos"               => "default",
+                  "h3demo"              => "default",
                   "devcryptoeng"        => "default",
                   "ec_nistp_64_gcc_128" => "default",
                   "egd"                 => "default",
diff --git a/demos/build.info b/demos/build.info
index 49484653f4..5822f9bfec 100644
--- a/demos/build.info
+++ b/demos/build.info
@@ -1,8 +1,10 @@
 SUBDIRS=bio cipher digest keyexch mac kdf pkey signature \
         encrypt encode sslecho
 
-IF[{- !$disabled{"quic"} -}]
-    SUBDIRS=http3
+IF[{- !$disabled{"h3demo"} -}]
+ IF[{- !$disabled{"quic"} -}]
+     SUBDIRS=http3
+ ENDIF
 ENDIF
 
 IF[{- !$disabled{"cms"} -}]