[mono] Fix libcoreclr.so build incompatibilities on Linux (#60077)

Backport of #59988

* Link with -z relro -z now to enable full RELRO mode
  Fixes #59904

* Generate and link in version.c to provide version string
  Fixes dotnet/source-build#2484

Co-authored-by: Ulrich Weigand <ulrich.weigand@de.ibm.com>

Author: github-actions[bot]

src/mono/CMakeLists.txt

@@ -205,6 +205,9 @@ elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
   set(HOST_LINUX 1)
   add_definitions(-D_GNU_SOURCE -D_REENTRANT)
   add_definitions(-D_THREAD_SAFE)
+  # Enable the "full RELRO" options (RELRO & BIND_NOW) at link time
+  add_link_options(-Wl,-z,relro)
+  add_link_options(-Wl,-z,now)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Android")
   set(HOST_LINUX 1)
   add_definitions(-D_GNU_SOURCE -D_REENTRANT)
@@ -724,11 +727,13 @@ endif()
 ######################################
 # EXTRACT VERSION
 ######################################
-if(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/_version.h")
-  if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
+if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
+  if(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/_version.h")
     file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/_version.h" "#undef VER_PRODUCTVERSION_STR\n#define VER_PRODUCTVERSION_STR \"42.42.42.42424\"\n")
-  else()
-    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/_version.h" "static char sccsid[] __attribute__((used)) = \"@(#)Version 42.42.42.42424 @Commit: AAA\";\n")
+  endif()
+else()
+  if(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/version.c")
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/version.c" "static char sccsid[] __attribute__((used)) = \"@(#)Version 42.42.42.42424 @Commit: AAA\";\n")
   endif()
 endif()
 if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows" AND NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/NativeVersion.rc")
@@ -750,7 +755,7 @@ if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
   file(STRINGS "${CMAKE_CURRENT_BINARY_DIR}/_version.h" product_version_string_line REGEX "VER_PRODUCTVERSION_STR ")
   string(REGEX REPLACE ".*VER_PRODUCTVERSION_STR *(.*)" "\\1" product_version_string ${product_version_string_line})
 else()
-  file(STRINGS "${CMAKE_CURRENT_BINARY_DIR}/_version.h" product_version_string_line REGEX "sccsid")
+  file(STRINGS "${CMAKE_CURRENT_BINARY_DIR}/version.c" product_version_string_line REGEX "sccsid")
   string(REGEX REPLACE ".*Version *(.*)\";" "\"\\1\"" product_version_string ${product_version_string_line})
 endif()
 

src/mono/mono.proj

@@ -724,13 +724,18 @@
   </Target>
 
   <Target Name="GenerateMonoVersionFile" DependsOnTargets="InitializeGenerateRuntimeVersionFile">
+    <PropertyGroup>
+      <NativeVersionFile Condition="'$(OS)' == 'Windows_NT'">_version.h</NativeVersionFile>
+      <NativeVersionFile Condition="'$(OS)' != 'Windows_NT'">version.c</NativeVersionFile>
+    </PropertyGroup>
+
     <MSBuild Projects="$(RepoRoot)eng\empty.csproj"
              Targets="GenerateRuntimeVersionFile"
-             Properties="NativeVersionFile=$(MonoObjDir)_version.h;RuntimeVersionFile=$(MonoObjDir)runtime_version.h" />
+             Properties="NativeVersionFile=$(MonoObjDir)$(NativeVersionFile);RuntimeVersionFile=$(MonoObjDir)runtime_version.h" />
     <MSBuild Condition="'$(BuildMonoAOTCrossCompiler)' == 'true'"
              Projects="$(RepoRoot)eng\empty.csproj"
              Targets="GenerateRuntimeVersionFile"
-             Properties="NativeVersionFile=$(MonoObjCrossDir)_version.h;RuntimeVersionFile=$(MonoObjCrossDir)runtime_version.h" />
+             Properties="NativeVersionFile=$(MonoObjCrossDir)$(NativeVersionFile);RuntimeVersionFile=$(MonoObjCrossDir)runtime_version.h" />
   </Target>
 
   <!-- The standard set of targets that need to run before the BuildMono target runs -->

src/mono/mono/mini/CMakeLists.txt

@@ -315,6 +315,8 @@ endif()
 
 if(HOST_WIN32)
 set(mini_sources "${mini_sources};${PROJECT_BINARY_DIR}/../../NativeVersion.rc") # this is generated by GenerateMonoVersionFile in mono.proj
+elseif(NOT HOST_BROWSER)
+set(mini_sources "${mini_sources};${PROJECT_BINARY_DIR}/../../version.c") # this is generated by GenerateMonoVersionFile in mono.proj
 endif()
 
 set(monosgen-sources "${metadata_sources};${utils_sources};${sgen_sources};${icu_shim_sources};${mini_sources};${zlib_sources}")