AK+Lagom: Make it possible to build for iOS

This commit makes it possible to build AK and most of Lagom for iOS,
based on the work for the Ladybird build demoed on discord:
https://discord.com/channels/830522505605283862/830525031720943627/1211987732646068314

AK/Platform.h

@@ -68,11 +68,16 @@
 #    define AK_OS_LINUX
 #endif
 
-#if defined(__APPLE__) && defined(__MACH__)
+#if defined(__APPLE__) && defined(__MACH__) && !defined(__IOS__)
 #    define AK_OS_MACOS
 #    define AK_OS_BSD_GENERIC
 #endif
 
+#if defined(__IOS__)
+#    define AK_OS_IOS
+#    define AK_OS_BSD_GENERIC
+#endif
+
 #if defined(__FreeBSD__)
 #    define AK_OS_BSD_GENERIC
 #    define AK_OS_FREEBSD

AK/StackInfo.cpp

@@ -12,9 +12,9 @@
 
 #ifdef AK_OS_SERENITY
 #    include <serenity.h>
-#elif defined(AK_OS_LINUX) or defined(AK_LIBC_GLIBC) or defined(AK_OS_MACOS) or defined(AK_OS_NETBSD) or defined(AK_OS_SOLARIS) or defined(AK_OS_HAIKU)
+#elif defined(AK_OS_LINUX) || defined(AK_LIBC_GLIBC) || defined(AK_OS_MACOS) || defined(AK_OS_IOS) || defined(AK_OS_NETBSD) || defined(AK_OS_SOLARIS) || defined(AK_OS_HAIKU)
 #    include <pthread.h>
-#elif defined(AK_OS_FREEBSD) or defined(AK_OS_OPENBSD)
+#elif defined(AK_OS_FREEBSD) || defined(AK_OS_OPENBSD)
 #    include <pthread.h>
 #    include <pthread_np.h>
 #elif defined(AK_OS_WINDOWS)
@@ -54,7 +54,7 @@ StackInfo::StackInfo()
         VERIFY_NOT_REACHED();
     }
     pthread_attr_destroy(&attr);
-#elif defined(AK_OS_MACOS)
+#elif defined(AK_OS_MACOS) || defined(AK_OS_IOS)
     // NOTE: !! On MacOS, pthread_get_stackaddr_np gives the TOP of the stack, not the bottom!
     FlatPtr top_of_stack = (FlatPtr)pthread_get_stackaddr_np(pthread_self());
     m_size = (size_t)pthread_get_stacksize_np(pthread_self());

Ladybird/CMakeLists.txt

@@ -8,7 +8,7 @@ project(ladybird
 
 include(GNUInstallDirs)
 
-if (ANDROID)
+if (ANDROID OR IOS)
     set(BUILD_SHARED_LIBS OFF)
 endif()
 

Ladybird/WebContent/CMakeLists.txt

@@ -42,7 +42,7 @@ if (ENABLE_QT)
     endif()
 else()
     set(LIB_TYPE STATIC)
-    if (ANDROID)
+    if (ANDROID OR IOS)
         set(LIB_TYPE SHARED)
     endif()
     add_library(webcontent ${LIB_TYPE} ${WEBCONTENT_SOURCES})

Meta/CMake/accelerated_graphics.cmake

@@ -4,7 +4,7 @@ if (NOT ENABLE_ACCELERATED_GRAPHICS OR EMSCRIPTEN)
     return()
 endif()
 
-if (APPLE)
+if (APPLE AND NOT IOS)
     set(HAS_ACCELERATED_GRAPHICS ON CACHE BOOL "" FORCE)
     set(ACCEL_GFX_LIBS "-framework OpenGL" CACHE STRING "" FORCE)
 else()

Meta/Lagom/CMakeLists.txt

@@ -539,7 +539,7 @@ if (BUILD_LAGOM)
 
     add_serenity_subdirectory(Userland/Shell)
 
-    if (NOT ENABLE_FUZZERS AND NOT ENABLE_COMPILER_EXPLORER_BUILD AND NOT ANDROID)
+    if (NOT ENABLE_FUZZERS AND NOT ENABLE_COMPILER_EXPLORER_BUILD AND NOT ANDROID AND NOT IOS)
         # Lagom Services
         add_serenity_subdirectory(Userland/Services)
 

Userland/Libraries/LibAudio/CMakeLists.txt

@@ -42,7 +42,7 @@ if (HAVE_PULSEAUDIO)
     target_compile_definitions(LibAudio PRIVATE HAVE_PULSEAUDIO=1)
 endif()
 
-if (APPLE)
+if (APPLE AND NOT IOS)
     target_sources(LibAudio PRIVATE PlaybackStreamAudioUnit.cpp)
 
     find_library(AUDIO_UNIT AudioUnit REQUIRED)

Userland/Libraries/LibCompress/BrotliDictionary.cpp

@@ -9,7 +9,7 @@
 
 // Include the 119.9 KiB of dictionary data from a binary file
 extern u8 const brotli_dictionary_data[];
-#if defined(AK_OS_MACOS)
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
 asm(".const_data\n"
     ".globl _brotli_dictionary_data\n"
     "_brotli_dictionary_data:\n");

Userland/Libraries/LibCore/CMakeLists.txt

@@ -55,7 +55,7 @@ if (SERENITYOS)
     list(APPEND SOURCES FileWatcherSerenity.cpp)
 elseif (LINUX AND NOT EMSCRIPTEN)
     list(APPEND SOURCES FileWatcherLinux.cpp)
-elseif (APPLE)
+elseif (APPLE AND NOT IOS)
     list(APPEND SOURCES FileWatcherMacOS.mm)
 else()
     list(APPEND SOURCES FileWatcherUnimplemented.cpp)

Userland/Libraries/LibCore/Environment.cpp

@@ -10,7 +10,7 @@
 #include "Environment.h"
 #include <AK/ByteString.h>
 
-#if defined(AK_OS_MACOS)
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
 #    include <crt_externs.h>
 #else
 extern char** environ;
@@ -20,7 +20,7 @@ namespace Core::Environment {
 
 char** raw_environ()
 {
-#if defined(AK_OS_MACOS)
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
     return *_NSGetEnviron();
 #else
     return environ;

Userland/Libraries/LibCore/LocalServer.cpp

@@ -81,7 +81,7 @@ bool LocalServer::listen(ByteString const& address)
     fcntl(m_fd, F_SETFD, FD_CLOEXEC);
 #endif
     VERIFY(m_fd >= 0);
-#ifndef AK_OS_MACOS
+#if !defined(AK_OS_MACOS) && !defined(AK_OS_IOS)
     rc = fchmod(m_fd, 0600);
     if (rc < 0) {
         perror("fchmod");
@@ -118,7 +118,7 @@ ErrorOr<NonnullOwnPtr<LocalSocket>> LocalServer::accept()
     VERIFY(m_listening);
     sockaddr_un un;
     socklen_t un_size = sizeof(un);
-#if !defined(AK_OS_MACOS) && !defined(AK_OS_HAIKU)
+#if !defined(AK_OS_MACOS) && !defined(AK_OS_IOS) && !defined(AK_OS_HAIKU)
     int accepted_fd = ::accept4(m_fd, (sockaddr*)&un, &un_size, SOCK_NONBLOCK | SOCK_CLOEXEC);
 #else
     int accepted_fd = ::accept(m_fd, (sockaddr*)&un, &un_size);
@@ -127,7 +127,7 @@ ErrorOr<NonnullOwnPtr<LocalSocket>> LocalServer::accept()
         return Error::from_syscall("accept"sv, -errno);
     }
 
-#if defined(AK_OS_MACOS) || defined(AK_OS_HAIKU)
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS) || defined(AK_OS_HAIKU)
     int option = 1;
     ioctl(m_fd, FIONBIO, &option);
     (void)fcntl(accepted_fd, F_SETFD, FD_CLOEXEC);

Userland/Libraries/LibCore/Socket.cpp

@@ -358,7 +358,7 @@ ErrorOr<void> LocalSocket::send_fd(int fd)
 
 ErrorOr<pid_t> LocalSocket::peer_pid() const
 {
-#ifdef AK_OS_MACOS
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
     pid_t pid;
     socklen_t pid_size = sizeof(pid);
 #elif defined(AK_OS_FREEBSD)
@@ -380,7 +380,7 @@ ErrorOr<pid_t> LocalSocket::peer_pid() const
     socklen_t creds_size = sizeof(creds);
 #endif
 
-#ifdef AK_OS_MACOS
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
     TRY(System::getsockopt(m_helper.fd(), SOL_LOCAL, LOCAL_PEERPID, &pid, &pid_size));
     return pid;
 #elif defined(AK_OS_FREEBSD)

Userland/Libraries/LibCore/System.cpp

@@ -47,7 +47,7 @@ static int memfd_create(char const* name, unsigned int flags)
 }
 #endif
 
-#if defined(AK_OS_MACOS)
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
 #    include <mach-o/dyld.h>
 #    include <sys/mman.h>
 #else
@@ -140,7 +140,7 @@ static ErrorOr<Optional<struct group>> getgrent_impl(Span<char> buffer)
 namespace Core::System {
 
 #ifndef HOST_NAME_MAX
-#    ifdef AK_OS_MACOS
+#    if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
 #        define HOST_NAME_MAX 255
 #    else
 #        define HOST_NAME_MAX 64
@@ -399,7 +399,7 @@ ErrorOr<Optional<struct spwd>> getspnam(StringView name)
 }
 #endif
 
-#if !defined(AK_OS_MACOS) && !defined(AK_OS_HAIKU)
+#if !defined(AK_OS_MACOS) && !defined(AK_OS_IOS) && !defined(AK_OS_HAIKU)
 ErrorOr<int> accept4(int sockfd, sockaddr* address, socklen_t* address_length, int flags)
 {
     auto fd = ::accept4(sockfd, address, address_length, flags);
@@ -898,17 +898,19 @@ ErrorOr<Optional<struct group>> getgrnam(StringView name)
         return Optional<struct group> {};
 }
 
+#if !defined(AK_OS_IOS)
 ErrorOr<void> clock_settime(clockid_t clock_id, struct timespec* ts)
 {
-#ifdef AK_OS_SERENITY
+#    ifdef AK_OS_SERENITY
     int rc = syscall(SC_clock_settime, clock_id, ts);
     HANDLE_SYSCALL_RETURN_VALUE("clocksettime", rc, {});
-#else
+#    else
     if (::clock_settime(clock_id, ts) < 0)
         return Error::from_syscall("clocksettime"sv, -errno);
     return {};
-#endif
+#    endif
 }
+#endif
 
 static ALWAYS_INLINE ErrorOr<pid_t> posix_spawn_wrapper(StringView path, posix_spawn_file_actions_t const* file_actions, posix_spawnattr_t const* attr, char* const arguments[], char* const envp[], StringView function_name, decltype(::posix_spawn) spawn_function)
 {
@@ -1379,7 +1381,7 @@ ErrorOr<void> exec(StringView filename, ReadonlySpan<StringView> arguments, Sear
         envp[environment->size()] = nullptr;
 
         if (search_in_path == SearchInPath::Yes && !filename.contains('/')) {
-#    if defined(AK_OS_MACOS) || defined(AK_OS_FREEBSD) || defined(AK_OS_SOLARIS)
+#    if defined(AK_OS_MACOS) || defined(AK_OS_IOS) || defined(AK_OS_FREEBSD) || defined(AK_OS_SOLARIS)
             // These BSDs don't support execvpe(), so we'll have to manually search the PATH.
             ScopedValueRollback errno_rollback(errno);
 
@@ -1782,7 +1784,7 @@ ErrorOr<ByteString> current_executable_path()
     size_t len = sizeof(path);
     if (sysctl(mib, 4, path, &len, nullptr, 0) < 0)
         return Error::from_syscall("sysctl"sv, -errno);
-#elif defined(AK_OS_MACOS)
+#elif defined(AK_OS_MACOS) || defined(AK_OS_IOS)
     u32 size = sizeof(path);
     auto ret = _NSGetExecutablePath(path, &size);
     if (ret != 0)

Userland/Libraries/LibCore/System.h

@@ -152,7 +152,11 @@ ErrorOr<Optional<struct group>> getgrnam(StringView name);
 ErrorOr<Optional<struct passwd>> getpwuid(uid_t);
 ErrorOr<Optional<struct group>> getgrent(Span<char> buffer);
 ErrorOr<Optional<struct group>> getgrgid(gid_t);
+
+#if !defined(AK_OS_IOS)
 ErrorOr<void> clock_settime(clockid_t clock_id, struct timespec* ts);
+#endif
+
 ErrorOr<pid_t> posix_spawn(StringView path, posix_spawn_file_actions_t const* file_actions, posix_spawnattr_t const* attr, char* const arguments[], char* const envp[]);
 ErrorOr<pid_t> posix_spawnp(StringView path, posix_spawn_file_actions_t* const file_actions, posix_spawnattr_t* const attr, char* const arguments[], char* const envp[]);
 ErrorOr<off_t> lseek(int fd, off_t, int whence);

Userland/Libraries/LibCore/TCPServer.cpp

@@ -80,7 +80,7 @@ ErrorOr<NonnullOwnPtr<TCPSocket>> TCPServer::accept()
     VERIFY(m_listening);
     sockaddr_in in;
     socklen_t in_size = sizeof(in);
-#if !defined(AK_OS_MACOS) && !defined(AK_OS_HAIKU)
+#if !defined(AK_OS_MACOS) && !defined(AK_OS_IOS) && !defined(AK_OS_HAIKU)
     int accepted_fd = TRY(Core::System::accept4(m_fd, (sockaddr*)&in, &in_size, SOCK_NONBLOCK | SOCK_CLOEXEC));
 #else
     int accepted_fd = TRY(Core::System::accept(m_fd, (sockaddr*)&in, &in_size));
@@ -88,7 +88,7 @@ ErrorOr<NonnullOwnPtr<TCPSocket>> TCPServer::accept()
 
     auto socket = TRY(TCPSocket::adopt_fd(accepted_fd));
 
-#if defined(AK_OS_MACOS) || defined(AK_OS_HAIKU)
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS) || defined(AK_OS_HAIKU)
     // FIXME: Ideally, we should let the caller decide whether it wants the
     //        socket to be nonblocking or not, but there are currently places
     //        which depend on this.

Userland/Libraries/LibFileSystem/FileSystem.cpp

@@ -14,7 +14,7 @@
 
 #if defined(AK_OS_SERENITY)
 #    include <serenity.h>
-#elif defined(AK_OS_BSD_GENERIC)
+#elif !defined(AK_OS_IOS) && defined(AK_OS_BSD_GENERIC)
 #    include <sys/disk.h>
 #elif defined(AK_OS_LINUX)
 #    include <linux/fs.h>
@@ -230,7 +230,7 @@ ErrorOr<void> copy_file(StringView destination_path, StringView source_path, str
 
     if (has_flag(preserve_mode, PreserveMode::Timestamps)) {
         struct timespec times[2] = {
-#ifdef AK_OS_MACOS
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
             source_stat.st_atimespec,
             source_stat.st_mtimespec,
 #else
@@ -278,7 +278,7 @@ ErrorOr<void> copy_directory(StringView destination_path, StringView source_path
 
     if (has_flag(preserve_mode, PreserveMode::Timestamps)) {
         struct timespec times[2] = {
-#ifdef AK_OS_MACOS
+#if defined(AK_OS_MACOS) || defined(AK_OS_IOS)
             source_stat.st_atimespec,
             source_stat.st_mtimespec,
 #else

Userland/Libraries/LibWeb/Loader/ResourceLoader.h

@@ -38,6 +38,8 @@ namespace Web {
 #    define OS_STRING "Linux"
 #elif defined(AK_OS_MACOS)
 #    define OS_STRING "macOS"
+#elif defined(AK_OS_IOS)
+#    define OS_STRING "iOS"
 #elif defined(AK_OS_WINDOWS)
 #    define OS_STRING "Windows"
 #elif defined(AK_OS_FREEBSD)