Fix failing Github MacOS actions due to updated XCode (#1800)

* add libgslcblas into portable binaries

* remove commented line

* update target OSX for macos 15

* ensure system headers come from the right macOS SDK.

Author: neodix42

.github/workflows/build-ton-macos-15-arm64-shared.yml

@@ -36,7 +36,7 @@ jobs:
           git submodule update
           cp assembly/native/build-macos-shared.sh .
           chmod +x build-macos-shared.sh
-          ./build-macos-shared.sh -t -c -o 15.0
+          ./build-macos-shared.sh -t -c -o 16.0
           ccache -sp
 
       - name: Run Tests

assembly/native/build-macos-portable.sh

@@ -127,6 +127,8 @@ fi
 cmake -GNinja .. \
 -DPORTABLE=1 \
 -DCMAKE_OSX_DEPLOYMENT_TARGET:STRING=$OSX_TARGET \
+-DCMAKE_CXX_FLAGS="-stdlib=libc++" \
+-DCMAKE_SYSROOT=$(xcrun --show-sdk-path) \
 -DCMAKE_BUILD_TYPE=Release \
 -DOPENSSL_FOUND=1 \
 -DOPENSSL_INCLUDE_DIR=$opensslPath/include \

assembly/native/build-macos-shared.sh

@@ -79,6 +79,8 @@ brew install openssl@3
 brew unlink openssl@3 &&  brew link --overwrite openssl@3
 
 cmake -GNinja -DCMAKE_BUILD_TYPE=Release .. \
+-DCMAKE_CXX_FLAGS="-stdlib=libc++" \
+-DCMAKE_SYSROOT=$(xcrun --show-sdk-path) \
 -DLZ4_FOUND=1 \
 -DLZ4_LIBRARIES=$lz4Path/lib/liblz4.a \
 -DLZ4_INCLUDE_DIRS=$lz4Path/lib