ngtcp2.sh: patch to disable requiring C++

C++ only necessary to build examples and BoringSSL feature detection.
We build lib-only, meaning no examples.

This breaks BoringSSL builds, because they would still require the C++
configuration. BoringSSL builds were broken anyway.

Patch submitted upstream:
ngtcp2/ngtcp2#1779

Author: vszakats

ngtcp2.dev.patch

@@ -0,0 +1 @@
+ngtcp2.patch

ngtcp2.patch

@@ -0,0 +1,38 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 45bddf9f..14dd1282 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -28,7 +28,7 @@ cmake_minimum_required(VERSION 3.20)
+ cmake_policy(SET CMP0063 NEW)
+ 
+ # XXX using 0.1.90 instead of 0.2.0-DEV
+-project(ngtcp2 VERSION 1.15.1)
++project(ngtcp2 VERSION 1.15.1 LANGUAGES C)
+ 
+ # See versioning rule:
+ #  https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+@@ -104,6 +104,10 @@ foreach(_build_type "Release" "MinSizeRel" "RelWithDebInfo")
+   endforeach()
+ endforeach()
+ 
++if(NOT ENABLE_LIB_ONLY OR ENABLE_BORINGSSL)
++  enable_language(CXX)
++endif()
++
+ include(CheckCCompilerFlag)
+ include(CheckCXXCompilerFlag)
+ 
+@@ -114,7 +118,12 @@ if(NOT CMAKE_C_COMPILER_ID MATCHES "MSVC")
+     cmake_push_check_state()
+     set(CMAKE_REQUIRED_LIBRARIES "-fsanitize=address")
+     check_c_compiler_flag(-fsanitize=address C__fsanitize_address_VALID)
+-    check_cxx_compiler_flag(-fsanitize=address CXX__fsanitize_address_VALID)
++    if(NOT ENABLE_LIB_ONLY OR ENABLE_BORINGSSL)
++      # Bypass C++-specific check for lib-only builds where C++ is not enabled.
++      set(CXX__fsanitize_address_VALID TRUE)
++    else()
++      check_cxx_compiler_flag(-fsanitize=address CXX__fsanitize_address_VALID)
++    endif()
+     cmake_pop_check_state()
+     if(NOT C__fsanitize_address_VALID OR NOT CXX__fsanitize_address_VALID)
+       message(WARNING "ENABLE_ASAN was requested, but not supported!")

ngtcp2.sh

@@ -47,14 +47,13 @@ _VER="$1"
   fi
 
   # shellcheck disable=SC2086
-  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${_CMAKE_CXX_GLOBAL} ${options} \
+  cmake -B "${_BLDDIR}" ${_CMAKE_GLOBAL} ${options} \
     -DENABLE_LIB_ONLY=ON \
     -DENABLE_STATIC_LIB=ON \
     -DENABLE_SHARED_LIB=OFF \
     -DBUILD_TESTING=OFF \
     -DCMAKE_INSTALL_PREFIX="${PWD}/${_PPS}" \
-    -DCMAKE_C_FLAGS="${_CFLAGS_GLOBAL_CMAKE} ${_CFLAGS_GLOBAL} ${_CPPFLAGS_GLOBAL} ${CPPFLAGS} ${_LDFLAGS_GLOBAL} ${LDFLAGS} ${LIBS}" \
-    -DCMAKE_CXX_FLAGS="${_CFLAGS_GLOBAL_CMAKE} ${_CFLAGS_GLOBAL} ${_CPPFLAGS_GLOBAL} ${CPPFLAGS} ${_LDFLAGS_GLOBAL} ${LDFLAGS} ${LIBS} ${_CXXFLAGS_GLOBAL} ${_LDFLAGS_CXX_GLOBAL}"
+    -DCMAKE_C_FLAGS="${_CFLAGS_GLOBAL_CMAKE} ${_CFLAGS_GLOBAL} ${_CPPFLAGS_GLOBAL} ${CPPFLAGS} ${_LDFLAGS_GLOBAL} ${LDFLAGS} ${LIBS}"
 
   cmake --build "${_BLDDIR}"
   cmake --install "${_BLDDIR}"

ngtcp2.test.patch

@@ -0,0 +1 @@
+ngtcp2.patch