Fix build

ios/HaskellShelley.xcodeproj/project.pbxproj

@@ -309,6 +309,7 @@
 					"$(SRCROOT)/../../../React/**",
 					"$(SRCROOT)/../../react-native/React/**",
 				);
+				IPHONEOS_DEPLOYMENT_TARGET = 12.4;
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_NAME = HaskellShelley;
@@ -326,6 +327,7 @@
 					"$(SRCROOT)/../../../React/**",
 					"$(SRCROOT)/../../react-native/React/**",
 				);
+				IPHONEOS_DEPLOYMENT_TARGET = 12.4;
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				OTHER_LDFLAGS = "-ObjC";
 				PRODUCT_NAME = HaskellShelley;

ios/build.sh

@@ -10,14 +10,6 @@ if [ "${HAS_CARGO_IN_PATH}" -ne "0" ]; then
     source $HOME/.cargo/env
 fi
 
-if [[ -n "${DEVELOPER_SDK_DIR:-}" ]] && [[ "$MAC_OS_VERSION" != "11" ]]; then
-  # Assume we're in Xcode, which means we're probably cross-compiling.
-  # In this case, we need to add an extra library search path for build scripts and proc-macros,
-  # which run on the host instead of the target.
-  # (macOS Big Sur does not have linkable libraries in /usr/lib/.)
-  export LIBRARY_PATH="${DEVELOPER_SDK_DIR}/MacOSX.sdk/usr/lib:${LIBRARY_PATH:-}"
-fi
-
 if [ -z "${PODS_TARGET_SRCROOT}" ]; then
     ROOT_DIR="${SRCROOT}/../rust"
 else

react-native-haskell-shelley.podspec

@@ -10,12 +10,11 @@ Pod::Spec.new do |s|
                   react-native-haskell-shelley
                    DESC
   s.homepage     = "https://github.com/Emurgo/react-native-haskell-shelley"
-  # brief license entry:
   s.license      = "MIT"
   # optional - use expanded license entry instead:
   # s.license    = { :type => "MIT", :file => "LICENSE" }
   s.authors      = { "emurgo" => "[email protected]" }
-  s.platforms    = { :ios => "11.0" }
+  s.platforms    = { :ios => "12.4" }
   s.source       = { :git => "https://github.com/Emurgo/react-native-haskell-shelley.git", :tag => "#{s.version}" }
 
   s.source_files = "ios/**/*.{h,c,m,swift,sh}"