osrm-backend: Fix build on darwin.

pkgs/servers/osrm-backend/darwin.patch

@@ -0,0 +1,30 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index e49fac2..25e3302 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -34,6 +34,14 @@ option(ENABLE_GLIBC_WORKAROUND "Workaround GLIBC symbol exports" OFF)
+ 
+ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+ 
++IF(APPLE)
++    set(CMAKE_THREAD_LIBS_INIT "-lpthread")
++    set(CMAKE_HAVE_THREADS_LIBRARY 1)
++    set(CMAKE_USE_WIN32_THREADS_INIT 0)
++    set(CMAKE_USE_PTHREADS_INIT 1)
++    set(THREADS_PREFER_PTHREAD_FLAG ON)
++ENDIF()
++
+ if(ENABLE_MASON)
+   # versions in use
+   set(MASON_BOOST_VERSION "1.65.1")
+@@ -405,7 +413,8 @@ endif()
+ if(APPLE)
+   set(CMAKE_OSX_DEPLOYMENT_TARGET "10.10")
+   execute_process(COMMAND xcrun --sdk macosx --show-sdk-path OUTPUT_VARIABLE CMAKE_OSX_SYSROOT OUTPUT_STRIP_TRAILING_WHITESPACE)
++  execute_process(COMMAND uname -m OUTPUT_VARIABLE JAMBA_OSX_NATIVE_ARCHITECTURE OUTPUT_STRIP_TRAILING_WHITESPACE)
+-  set(CMAKE_OSX_ARCHITECTURES "x86_64")
++  set(CMAKE_OSX_ARCHITECTURES "${JAMBA_OSX_NATIVE_ARCHITECTURE}")
++  message(STATUS "Set Architecture to ${JAMBA_OSX_NATIVE_ARCHITECTURE} on OS X")
+-  message(STATUS "Set Architecture to x64 on OS X")
+   exec_program(uname ARGS -v  OUTPUT_VARIABLE DARWIN_VERSION)
+   string(REGEX MATCH "[0-9]+" DARWIN_VERSION ${DARWIN_VERSION})

pkgs/servers/osrm-backend/default.nix

@@ -15,6 +15,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ bzip2 libxml2 libzip boost lua luabind tbb expat ];
 
+  patches = [ ./darwin.patch ];
+
   env.NIX_CFLAGS_COMPILE = toString [
     # Needed with GCC 12
     "-Wno-error=stringop-overflow"
@@ -28,6 +30,6 @@ stdenv.mkDerivation rec {
     description = "Open Source Routing Machine computes shortest paths in a graph. It was designed to run well with map data from the Openstreetmap Project";
     license = lib.licenses.bsd2;
     maintainers = with lib.maintainers;[ erictapen ];
-    platforms = lib.platforms.linux;
+    platforms = lib.platforms.unix;
   };
 }