[ios] Re-add i386 slice to framework; strip from dSYM

Author: friedbunny

platform/ios/CHANGELOG.md

@@ -4,7 +4,7 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT
 
 ## 3.7.2
 
-* Removed support for 32-bit simulators. ([#10772](https://github.com/mapbox/mapbox-gl-native/pull/10772))
+* Reduced the file size of the dSYM by removing the i386 architecture. Support for the i386 architecture (used by 32-bit simulators) will also be removed from the framework itself in a future release. ([#10781](https://github.com/mapbox/mapbox-gl-native/pull/10781))
 
 ## 3.7.1 - December 6, 2017
 

platform/ios/INSTALL.md

@@ -10,7 +10,7 @@ The Mapbox Maps SDK for iOS is intended to run on iOS 8.0 and above on the follo
 * iPad 2 and above (3, 4, Mini, Air, Mini 2, Air 2, Pro)
 * iPod touch 5th generation and above
 
-Note that 32-bit simulators (such as the iPhone 5 or iPad 2) are not supported.
+Note that debugging in 32-bit simulators (such as the iPhone 5 or iPad 2) is only partially supported. Support for these simulators will be removed entirely in a future release of this SDK.
 
 The Mapbox Maps SDK for iOS requires Xcode 8.0 or higher. To use this SDK with Xcode 7.3.1, download and use a symbols build from the [releases](https://github.com/mapbox/mapbox-gl-native/releases) page.
 

platform/ios/scripts/package.sh

@@ -70,7 +70,7 @@ xcodebuild \
     CURRENT_SHORT_VERSION=${SHORT_VERSION} \
     CURRENT_SEMANTIC_VERSION=${SEM_VERSION} \
     CURRENT_COMMIT_HASH=${HASH} \
-    ARCHS="x86_64" \
+    ONLY_ACTIVE_ARCH=NO \
     -derivedDataPath ${DERIVED_DATA} \
     -workspace ./platform/ios/ios.xcworkspace \
     -scheme ${SCHEME} \
@@ -194,6 +194,11 @@ if [[ ${BUILD_DYNAMIC} == true && ${BUILDTYPE} == Release ]]; then
     validate_dsym \
         "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}" \
         "${OUTPUT}/dynamic/${NAME}.framework/${NAME}"
+
+        # To-do: remove this in 4.0.0, as we intend to remove support for i386 entirely.
+        step "Removing i386 slice from dSYM"
+        lipo -remove i386 "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}" -o "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}"
+        lipo -info "${OUTPUT}/dynamic/${NAME}.framework.dSYM/Contents/Resources/DWARF/${NAME}"
 fi
 
 function create_podspec {