[Linux] Enable build-ids.

CMakeLists.txt

@@ -67,6 +67,9 @@ endif()
 include(SwiftSupport)
 include(GNUInstallDirs)
 include(XCTest)
+include(CheckLinkerFlag)
+
+check_linker_flag(C "LINKER:-build-id=sha1" LINKER_SUPPORTS_BUILD_ID)
 
 set(CF_DEPLOYMENT_SWIFT YES CACHE BOOL "Build for Swift" FORCE)
 

CoreFoundation/CMakeLists.txt

@@ -433,6 +433,10 @@ if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
   endif()
 endif()
 
+if(LINKER_SUPPORTS_BUILD_ID)
+  target_link_options(CoreFoundation PRIVATE "LINKER:-build-id=sha1")
+endif()
+
 if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
   if((NS_CURL_ASSUME_FEATURES_MISSING) OR (CURL_VERSION_STRING VERSION_LESS "7.32.0"))
     add_compile_definitions($<$<COMPILE_LANGUAGE:C>:NS_CURL_MISSING_XFERINFOFUNCTION>)

Sources/Foundation/CMakeLists.txt

@@ -237,6 +237,9 @@ if(CMAKE_SYSTEM_NAME STREQUAL WASI)
       "SHELL:-Xfrontend -public-autolink-library -Xfrontend wasi-emulated-getpid")
 endif()
 
+if(LINKER_SUPPORTS_BUILD_ID)
+  target_link_options(Foundation PRIVATE "LINKER:-build-id=sha1")
+endif()
 
 set_property(GLOBAL APPEND PROPERTY Foundation_EXPORTS Foundation)
 _install_target(Foundation)

Sources/FoundationNetworking/CMakeLists.txt

@@ -98,6 +98,9 @@ if(NOT CMAKE_SYSTEM_NAME MATCHES "Darwin|Windows")
   target_link_options(FoundationNetworking PRIVATE "SHELL:-no-toolchain-stdlib-rpath")
 endif()
 
+if(LINKER_SUPPORTS_BUILD_ID)
+  target_link_options(FoundationNetworking PRIVATE "LINKER:-build-id=sha1")
+endif()
 
 set_property(GLOBAL APPEND PROPERTY Foundation_EXPORTS FoundationNetworking)
 _install_target(FoundationNetworking)

Sources/FoundationXML/CMakeLists.txt

@@ -50,5 +50,9 @@ if(CMAKE_SYSTEM_NAME STREQUAL WASI)
            -Xcc -D_WASI_EMULATED_MMAN")
 endif()
 
+if(LINKER_SUPPORTS_BUILD_ID)
+  target_link_options(FoundationXML PRIVATE "LINKER:-build-id=sha1")
+endif()
+
 set_property(GLOBAL APPEND PROPERTY Foundation_EXPORTS FoundationXML)
 _install_target(FoundationXML)