Disable the version.h update by default

closes #1227

.github/workflows/check-version.yml

@@ -14,7 +14,7 @@ jobs:
     - name: submodules
       run: git submodule update --init --recursive --depth 1
     - name: cmake
-      run: cmake -B build -DUSE_GNUTLS=0 -DUSE_SYSTEM_SRTP=1 -DWARNINGS_AS_ERRORS=1
+      run: cmake -B build -DUSE_GNUTLS=0 -DUSE_SYSTEM_SRTP=1 -DWARNINGS_AS_ERRORS=1 -DRTC_UPDATE_VERSION_HEADER=1
     - name: check diff
       run: |
         if ! git diff --exit-code

CMakeLists.txt

@@ -23,6 +23,7 @@ option(NO_TESTS "Disable tests build" OFF)
 option(WARNINGS_AS_ERRORS "Treat warnings as errors" OFF)
 option(CAPI_STDCALL "Set calling convention of C API callbacks stdcall" OFF)
 option(SCTP_DEBUG "Enable SCTP debugging output to verbose log" OFF)
+option(RTC_UPDATE_VERSION_HEADER "Enable updating the version header" OFF)
 
 if (USE_GNUTLS AND USE_MBEDTLS)
 	message(FATAL_ERROR "Both USE_MBEDTLS and USE_GNUTLS cannot be enabled at the same time")
@@ -260,10 +261,12 @@ else()
 	add_library(Usrsctp::Usrsctp ALIAS usrsctp)
 endif()
 
-configure_file (
-    ${PROJECT_SOURCE_DIR}/cmake/version.h.in
-	${CMAKE_CURRENT_SOURCE_DIR}/include/rtc/version.h
-)
+if(RTC_UPDATE_VERSION_HEADER)
+	configure_file (
+		${PROJECT_SOURCE_DIR}/cmake/version.h.in
+		${CMAKE_CURRENT_SOURCE_DIR}/include/rtc/version.h
+	)
+endif()
 
 add_library(datachannel SHARED
 	${LIBDATACHANNEL_SOURCES}