Add support for building for iOS (#1904)

* Add support for building for iOS

* Add iOS azure template

Co-authored-by: Thad House <thadhouse1@gmail.com>

.azure/azure-pipelines.ci.yml

@@ -386,6 +386,13 @@ stages:
       extraName: 'static'
       extraBuildArgs: -Static -ExtraArtifactDir Static
 
+  - template: ./templates/build-config-user.yml
+    parameters:
+      image: macOS-10.15
+      platform: ios
+      arch: arm64
+      tls: openssl
+
 - stage: merge_darwin
   displayName: Merge Darwin (macOS)
   dependsOn:

CMakeLists.txt

@@ -336,13 +336,13 @@ if(QUIC_TLS STREQUAL "openssl")
     list(APPEND QUIC_COMMON_DEFINES QUIC_DISABLE_DEFERRED_CERT_TESTS)
 endif()
 
-if (CMAKE_GENERATOR_PLATFORM STREQUAL "")
-    string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} SYSTEM_PROCESSOR)
-else()
-    string(TOLOWER ${CMAKE_GENERATOR_PLATFORM} SYSTEM_PROCESSOR)
-endif()
-
 if(WIN32)
+    if (CMAKE_GENERATOR_PLATFORM STREQUAL "")
+        string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} SYSTEM_PROCESSOR)
+    else()
+        string(TOLOWER ${CMAKE_GENERATOR_PLATFORM} SYSTEM_PROCESSOR)
+    endif()
+
     # Generate the MsQuicEtw header file.
     file(MAKE_DIRECTORY ${QUIC_BUILD_DIR}/inc)
 

scripts/build.ps1

@@ -108,7 +108,7 @@ param (
     [string]$Arch = "",
 
     [Parameter(Mandatory = $false)]
-    [ValidateSet("uwp", "windows", "linux", "macos", "android")] # For future expansion
+    [ValidateSet("uwp", "windows", "linux", "macos", "android", "ios")] # For future expansion
     [string]$Platform = "",
 
     [Parameter(Mandatory = $false)]
@@ -219,6 +219,11 @@ if (!$IsWindows -And $Platform -eq "uwp") {
     exit
 }
 
+if ($Platform -eq "ios" -and !$Static) {
+    $Static = $true
+    Write-Host "iOS can only be built as static"
+}
+
 # Root directory of the project.
 $RootDir = Split-Path $PSScriptRoot -Parent
 
@@ -295,6 +300,9 @@ function CMake-Generate {
     } else {
         $Arguments += " $Generator"
     }
+    if ($Platform -eq "ios") {
+        $Arguments += " -DCMAKE_SYSTEM_NAME=iOS"
+    }
     if($Static) {
         $Arguments += " -DQUIC_BUILD_SHARED=off"
     }

scripts/get-buildconfig.ps1

@@ -30,7 +30,7 @@ param (
     [string]$Arch = "",
 
     [Parameter(Mandatory = $false)]
-    [ValidateSet("uwp", "windows", "linux", "macos", "android", "")] # For future expansion
+    [ValidateSet("uwp", "windows", "linux", "macos", "android", "ios", "")] # For future expansion
     [string]$Platform = "",
 
     [Parameter(Mandatory = $false)]
@@ -53,6 +53,15 @@ if ($Platform -eq "android") {
     }
 }
 
+if ($Platform -eq "ios") {
+    if (!$IsMacOS) {
+        Write-Error  "Can only build ios on macOS"
+    }
+    if ($Arch -eq "") {
+        $Arch = "arm64"
+    }
+}
+
 if ("" -eq $Arch) {
     if ($IsMacOS) {
         $RunningArch = uname -m

src/platform/selfsign_openssl.c

@@ -26,6 +26,9 @@ Abstract:
 #ifdef _WIN32
 #pragma warning(pop)
 #endif
+#ifdef __APPLE__
+#include <TargetConditionals.h>
+#endif
 #ifdef QUIC_CLOG
 #include "selfsign_openssl.c.clog.h"
 #endif
@@ -476,6 +479,9 @@ CxPlatFreeSelfSignedCert(
 #ifdef _WIN32
     DeleteFileA(Params->CertFilepath);
     DeleteFileA(Params->PrivateKeyFilepath);
+#elif TARGET_OS_IOS
+    UNREFERENCED_PARAMETER(CredConfig);
+    UNREFERENCED_PARAMETER(Params);
 #else
     char RmCmd[32] = {0};
     strncpy(RmCmd, "rm -rf ", 7 + 1);