Prototype building hermetically for arm.

$ gn gen out/linux-arm
$ cp starboard/evergreen/arm/softfp/args.gn out/linux-arm
$ autoninja -C out/linux-arm absl
$ autoninja -C out/linux-arm base
$ autoninja -C out/linux-arm base_unittests
$ autoninja -C out/linux-armn net
$ autoninja -C out/linux-arm cobalt_lib
$ nm -uC out/linux-arm/libbase_unittests.so

base/BUILD.gn

@@ -102,7 +102,7 @@ if (is_apple) {
 }
 
 # Determines whether libevent should be dep.
-dep_libevent = !is_fuchsia && !is_win && !is_mac && !is_nacl
+dep_libevent = !is_fuchsia && !is_win && !is_mac && !is_nacl && !use_starboard
 
 # Determines whether message_pump_libevent should be used.
 use_libevent = dep_libevent && !is_ios
@@ -197,7 +197,7 @@ buildflag_header("ios_cronet_buildflags") {
   flags = [ "CRONET_BUILD=$is_cronet_build" ]
 }
 
-enable_message_pump_epoll = is_linux || is_chromeos || is_android
+enable_message_pump_epoll = is_linux || is_chromeos || is_android || use_starboard
 buildflag_header("message_pump_buildflags") {
   header = "message_pump_buildflags.h"
   header_dir = "base/message_loop"
@@ -1658,7 +1658,7 @@ component("base") {
       ]
     }
 
-    if (is_posix && !is_apple) {
+    if (is_posix && !is_apple && !use_starboard) {
       sources += [
         "native_library_posix.cc",
         "posix/can_lower_nice_to.cc",
@@ -2102,7 +2102,7 @@ component("base") {
     configs += linux_configs
     all_dependent_configs += linux_configs
     sources += [ "system/sys_info_linux.cc" ]
-    if (!is_cronet_build) {
+    if (!is_cronet_build && !use_starboard) {
       # These dependencies are not required on Android, and in the case
       # of xdg_mime must be excluded due to licensing restrictions.
       sources += [
@@ -3053,7 +3053,10 @@ source_set("arm_bti_testfunctions") {
   }
 }
 
-test("base_unittests") {
+#hack
+#test("base_unittests") {
+shared_library("base_unittests") {
+  testonly=true
   sources = [
     "allocator/dispatcher/dispatcher_unittest.cc",
     "allocator/dispatcher/initializer_unittest.cc",
@@ -3124,7 +3127,8 @@ test("base_unittests") {
     "files/file_path_watcher_unittest.cc",
     "files/file_proxy_unittest.cc",
     "files/file_unittest.cc",
-    "files/file_util_unittest.cc",
+    # hack
+    #"files/file_util_unittest.cc",
     "files/important_file_writer_cleaner_unittest.cc",
     "files/important_file_writer_unittest.cc",
     "files/memory_mapped_file_unittest.cc",
@@ -3458,10 +3462,16 @@ test("base_unittests") {
     "//third_party/modp_b64",
   ]
 
-  data_deps = [
-    "//base/test:immediate_crash_test_helper",
-    "//base/test:test_child_process",
-    "//base/test:test_shared_library",
+  data_deps = []
+  if (!use_starboard) {
+    data_deps += [
+      "//base/test:immediate_crash_test_helper",
+      "//base/test:test_child_process",
+      "//base/test:test_shared_library",
+    ]
+  }
+
+  data_deps += [
     "//testing/buildbot/filters:base_unittests_filters",
   ]
 
@@ -3780,7 +3790,8 @@ test("base_unittests") {
       "allocator/partition_allocator/partition_alloc_base/scoped_clear_last_error_pa_unittest.cc",
       "allocator/partition_allocator/partition_alloc_base/strings/stringprintf_pa_unittest.cc",
       "allocator/partition_allocator/partition_alloc_base/thread_annotations_pa_unittest.cc",
-      "allocator/partition_allocator/partition_alloc_unittest.cc",
+      # hack
+      #"allocator/partition_allocator/partition_alloc_unittest.cc",
       "allocator/partition_allocator/partition_lock_unittest.cc",
       "allocator/partition_allocator/reverse_bytes_unittest.cc",
       "allocator/partition_allocator/thread_cache_unittest.cc",
@@ -3843,18 +3854,20 @@ test("base_unittests") {
     }
   }
 
-  if (is_fuchsia || is_linux || is_chromeos) {
+  if ((is_fuchsia || is_linux || is_chromeos) && !use_starboard) {
     sources += [
       "debug/elf_reader_unittest.cc",
       "debug/test_elf_image_builder.cc",
       "debug/test_elf_image_builder.h",
     ]
 
-    deps += [ "//base/test:malloc_wrapper" ]
-    defines += [
-      # This library is used by ElfReaderTest to test reading elf files.
-      "MALLOC_WRAPPER_LIB=\"${shlib_prefix}malloc_wrapper${shlib_extension}\"",
-    ]
+    if(!use_starboard) {
+      deps += [ "//base/test:malloc_wrapper" ]
+      defines += [
+        # This library is used by ElfReaderTest to test reading elf files.
+        "MALLOC_WRAPPER_LIB=\"${shlib_prefix}malloc_wrapper${shlib_extension}\"",
+      ]
+    }
 
     if (!is_component_build) {
       # Set rpath to find libmalloc_wrapper.so even in a non-component build.

base/allocator/partition_allocator/partition_alloc_base/cpu.cc

@@ -17,7 +17,7 @@
 #include "build/build_config.h"
 
 #if defined(ARCH_CPU_ARM_FAMILY) && \
-    (BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS))
+    (BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !defined(OS_STARBOARD)
 #include <asm/hwcap.h>
 #include <sys/auxv.h>
 

base/allocator/partition_allocator/partition_alloc_base/rand_util_posix.cc

@@ -18,7 +18,7 @@
 #include "base/allocator/partition_allocator/partition_alloc_check.h"
 #include "build/build_config.h"
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD)
 #include "third_party/lss/linux_syscall_support.h"
 #elif BUILDFLAG(IS_MAC)
 // TODO(crbug.com/995996): Waiting for this header to appear in the iOS SDK.
@@ -68,7 +68,7 @@ namespace partition_alloc::internal::base {
 // (https://chromium-review.googlesource.com/c/chromium/src/+/1545096) and land
 // it or some form of it.
 void RandBytes(void* output, size_t output_length) {
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) &&  !BUILDFLAG(USE_STARBOARD)
   // We have to call `getrandom` via Linux Syscall Support, rather than through
   // the libc wrapper, because we might not have an up-to-date libc (e.g. on
   // some bots).

base/allocator/partition_allocator/partition_alloc_config.h

@@ -104,7 +104,7 @@ static_assert(sizeof(void*) != 8, "");
 // POSIX is not only UNIX, e.g. macOS and other OSes. We do use Linux-specific
 // features such as futex(2).
 #define PA_CONFIG_HAS_LINUX_KERNEL() \
-  (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID))
+  ((BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)) && !BUILDFLAG(USE_STARBOARD))
 
 // On some platforms, we implement locking by spinning in userspace, then going
 // into the kernel only if there is contention. This requires platform support,
@@ -119,8 +119,8 @@ static_assert(sizeof(void*) != 8, "");
 //   is available.
 //
 // Otherwise, a userspace spinlock implementation is used.
-#if PA_CONFIG(HAS_LINUX_KERNEL) || BUILDFLAG(IS_WIN) || BUILDFLAG(IS_APPLE) || \
-    BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
+#if (PA_CONFIG(HAS_LINUX_KERNEL) || BUILDFLAG(IS_WIN) || BUILDFLAG(IS_APPLE) || \
+    BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)) && !BUILDFLAG(USE_STARBOARD)
 #define PA_CONFIG_HAS_FAST_MUTEX() 1
 #else
 #define PA_CONFIG_HAS_FAST_MUTEX() 0

base/allocator/partition_allocator/shim/allocator_shim_internals.h

@@ -9,7 +9,7 @@
 
 #if defined(__GNUC__)
 
-#if BUILDFLAG(IS_POSIX)
+#if BUILDFLAG(IS_POSIX) && !BUILDFLAG(USE_STARBOARD)
 #include <sys/cdefs.h>  // for __THROW
 #endif
 

base/allocator/partition_allocator/spinning_mutex.h

@@ -88,7 +88,6 @@ class PA_LOCKABLE PA_COMPONENT_EXPORT(PARTITION_ALLOC) SpinningMutex {
   static constexpr int kSpinCount = 64;
 
 #if PA_CONFIG(HAS_FAST_MUTEX)
-
 #if PA_CONFIG(HAS_LINUX_KERNEL)
   void FutexWait();
   void FutexWake();
@@ -112,7 +111,8 @@ class PA_LOCKABLE PA_COMPONENT_EXPORT(PARTITION_ALLOC) SpinningMutex {
   std::atomic<bool> lock_{false};
 
   // Spinlock-like, fallback.
-  PA_ALWAYS_INLINE bool TrySpinLock();
+  // hack
+  PA_ALWAYS_INLINE bool TrySpinLock() { return true;}
   PA_ALWAYS_INLINE void ReleaseSpinLock();
   void LockSlowSpinLock();
 #endif  // PA_CONFIG(HAS_FAST_MUTEX)

base/cpu.cc

@@ -18,7 +18,7 @@
 #include "build/build_config.h"
 
 #if defined(ARCH_CPU_ARM_FAMILY) && \
-    (BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS))
+    ((BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD))
 #include <asm/hwcap.h>
 #include <sys/auxv.h>
 
@@ -143,7 +143,7 @@ uint64_t xgetbv(uint32_t xcr) {
 #endif  // ARCH_CPU_X86_FAMILY
 
 #if defined(ARCH_CPU_ARM_FAMILY) && \
-    (BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS))
+    ((BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD))
 StringPairs::const_iterator FindFirstProcCpuKey(const StringPairs& pairs,
                                                 StringPiece key) {
   return ranges::find_if(pairs, [key](const StringPairs::value_type& pair) {
@@ -340,7 +340,7 @@ void CPU::Initialize(bool require_branding) {
     }
   }
 #elif defined(ARCH_CPU_ARM_FAMILY)
-#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD)
   if (require_branding) {
     const ProcCpuInfo& info = ParseProcCpu();
     cpu_brand_ = info.brand;

base/debug/stack_trace_posix.cc

@@ -301,7 +301,7 @@ void PrintToStderr(const char* output) {
   std::ignore = HANDLE_EINTR(write(STDERR_FILENO, output, strlen(output)));
 }
 
-#if BUILDFLAG(IS_LINUX)
+#if BUILDFLAG(IS_LINUX) && !BUILDFLAG(USE_STARBOARD)
 void AlarmSignalHandler(int signal, siginfo_t* info, void* void_context) {
   // We have seen rare cases on AMD linux where the default signal handler
   // either does not run or a thread (Probably an AMD driver thread) prevents
@@ -534,7 +534,7 @@ void StackDumpSignalHandler(int signal, siginfo_t* info, void* void_context) {
   if (::signal(signal, SIG_DFL) == SIG_ERR) {
     _exit(EXIT_FAILURE);
   }
-#elif !BUILDFLAG(IS_LINUX)
+#elif !BUILDFLAG(IS_LINUX) || BUILDFLAG(USE_STARBOARD)
   // For all operating systems but Linux we do not reraise the signal that
   // brought us here but terminate the process immediately.
   // Otherwise various tests break on different operating systems, see

base/files/file_util_unittest.cc

@@ -77,7 +77,7 @@
 #include <sys/socket.h>
 #endif
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD)
 #include <linux/fs.h>
 #endif
 

base/process/memory_linux.cc

@@ -108,7 +108,7 @@ bool AdjustOOMScore(ProcessId process, int score) {
 bool UncheckedMalloc(size_t size, void** result) {
 #if BUILDFLAG(USE_ALLOCATOR_SHIM)
   *result = allocator_shim::UncheckedAlloc(size);
-#elif defined(MEMORY_TOOL_REPLACES_ALLOCATOR) || !defined(LIBC_GLIBC)
+#elif defined(MEMORY_TOOL_REPLACES_ALLOCATOR) || !defined(LIBC_GLIBC) || BUILDFLAG(USE_STARBOARD)
   *result = malloc(size);
 #elif defined(LIBC_GLIBC)
   *result = __libc_malloc(size);
@@ -119,7 +119,7 @@ bool UncheckedMalloc(size_t size, void** result) {
 void UncheckedFree(void* ptr) {
 #if BUILDFLAG(USE_ALLOCATOR_SHIM)
   allocator_shim::UncheckedFree(ptr);
-#elif defined(MEMORY_TOOL_REPLACES_ALLOCATOR) || !defined(LIBC_GLIBC)
+#elif defined(MEMORY_TOOL_REPLACES_ALLOCATOR) || !defined(LIBC_GLIBC) ||  BUILDFLAG(USE_STARBOARD)
   free(ptr);
 #elif defined(LIBC_GLIBC)
   __libc_free(ptr);

base/process/process_linux.cc

@@ -5,7 +5,9 @@
 #include "base/process/process.h"
 
 #include <errno.h>
+#if !BUILDFLAG(USE_STARBOARD)
 #include <linux/magic.h>
+#endif
 #include <sys/resource.h>
 #include <sys/vfs.h>
 

base/process/process_metrics_posix.cc

@@ -105,7 +105,7 @@ void IncreaseFdLimitTo(unsigned int max_descriptors) {
 
 #endif  // !BUILDFLAG(IS_FUCHSIA)
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)) && !BUILDFLAG(USE_STARBOARD)
 namespace {
 
 size_t GetMallocUsageMallinfo() {
@@ -131,11 +131,13 @@ size_t ProcessMetrics::GetMallocUsage() {
   malloc_statistics_t stats = {0};
   malloc_zone_statistics(nullptr, &stats);
   return stats.size_in_use;
-#elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
+#elif (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)) && !BUILDFLAG(USE_STARBOARD)
   return GetMallocUsageMallinfo();
 #elif BUILDFLAG(IS_FUCHSIA)
   // TODO(fuchsia): Not currently exposed. https://crbug.com/735087.
   return 0;
+#elif BUILDFLAG(USE_STARBOARD)
+  return 0;
 #endif
 }
 

base/rand_util_posix.cc

@@ -22,7 +22,7 @@
 #include "base/time/time.h"
 #include "build/build_config.h"
 
-#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(IS_NACL)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(IS_NACL) && !BUILDFLAG(USE_STARBOARD)
 #include "third_party/lss/linux_syscall_support.h"
 #elif BUILDFLAG(IS_MAC)
 // TODO(crbug.com/995996): Waiting for this header to appear in the iOS SDK.

base/system/sys_info_posix.cc

@@ -35,7 +35,7 @@
 #include <sys/statvfs.h>
 #endif
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD)
 #include <linux/magic.h>
 #include <sys/vfs.h>
 #endif
@@ -60,7 +60,7 @@ base::LazyInstance<
     base::internal::LazySysInfoValue<uint64_t, AmountOfVirtualMemory>>::Leaky
     g_lazy_virtual_memory = LAZY_INSTANCE_INITIALIZER;
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD)
 bool IsStatsZeroIfUnlimited(const base::FilePath& path) {
   struct statfs stats;
 
@@ -90,7 +90,7 @@ bool GetDiskSpaceInfo(const base::FilePath& path,
   if (HANDLE_EINTR(statvfs(path.value().c_str(), &stats)) != 0)
     return false;
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)) && !BUILDFLAG(USE_STARBOARD)
   const bool zero_size_means_unlimited =
       stats.f_blocks == 0 && IsStatsZeroIfUnlimited(path);
 #else

base/third_party/xdg_mime/BUILD.gn

@@ -2,27 +2,29 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-static_library("xdg_mime") {
-  visibility = [ "//base/*" ]
-  sources = [
-    "xdgmime.c",
-    "xdgmime.h",
-    "xdgmimealias.c",
-    "xdgmimealias.h",
-    "xdgmimecache.c",
-    "xdgmimecache.h",
-    "xdgmimeglob.c",
-    "xdgmimeglob.h",
-    "xdgmimeicon.c",
-    "xdgmimeicon.h",
-    "xdgmimeint.c",
-    "xdgmimeint.h",
-    "xdgmimemagic.c",
-    "xdgmimemagic.h",
-    "xdgmimeparent.c",
-    "xdgmimeparent.h",
-  ]
+if (!use_starboard) {
+  static_library("xdg_mime") {
+    visibility = [ "//base/*" ]
+    sources = [
+      "xdgmime.c",
+      "xdgmime.h",
+      "xdgmimealias.c",
+      "xdgmimealias.h",
+      "xdgmimecache.c",
+      "xdgmimecache.h",
+      "xdgmimeglob.c",
+      "xdgmimeglob.h",
+      "xdgmimeicon.c",
+      "xdgmimeicon.h",
+      "xdgmimeint.c",
+      "xdgmimeint.h",
+      "xdgmimemagic.c",
+      "xdgmimemagic.h",
+      "xdgmimeparent.c",
+      "xdgmimeparent.h",
+    ]
 
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
+    configs -= [ "//build/config/compiler:chromium_code" ]
+    configs += [ "//build/config/compiler:no_chromium_code" ]
+  }
 }