Update iOS crossbuild commands

Author: moluopro

.github/workflows/apple_m.yml

@@ -244,15 +244,12 @@ jobs:
 
       - name: Crossbuild to iOS
         run: |
-          #brew install llvm
-          #export #PATH=/opt/homebrew/opt/llvm/bin:$PATH
-          # export #LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
-          export #CPPFLAGS="-I/opt/homebrew/opt/llvm/include" 
-          export CC=/Applications/Xcode_26.0.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-          export CFLAGS="-O2 -unwindlib=none -Wno-macro-redefined -isysroot /Applications/Xcode_26.0.1.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.0.sdk -arch arm64 -miphoneos-version-min=10.0"
-          xcrun --sdk iphoneos --show-sdk-path
-          ls -l /Applications
-          make TARGET=ARMV8 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1 CROSS=1
+          CC="$(xcrun --sdk iphoneos --find clang)"
+          SDKROOT="$(xcrun --sdk iphoneos --show-sdk-path)"
+          echo "CC=${CC}"
+          echo "SDKROOT=${SDKROOT}"
+          make TARGET=ARMV8 DYNAMIC_ARCH=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1 \
+            CC="${CC}" CFLAGS="-O2 -Wno-macro-redefined -isysroot ${SDKROOT} -arch arm64 -miphoneos-version-min=10.0"
 
   xbuild-ios32:
     if: "github.repository == 'OpenMathLib/OpenBLAS'"
@@ -296,4 +293,3 @@ jobs:
           export AR=/opt/homebrew/share/android-ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/llvm-ar
           export RANLIB=/opt/homebrew/share/android-ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/llvm-ranlib
           make TARGET=ARMV7 ARM_SOFTFP_ABI=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1
-

docs/install.md

@@ -716,14 +716,13 @@ fully working OpenBLAS for this platform.
 
 Go to the directory where you unpacked OpenBLAS,and enter the following commands:
 ```bash
-CC="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
-
+CC="$(xcrun --sdk iphoneos --find clang)"
 SDKROOT="$(xcrun --sdk iphoneos --show-sdk-path)"
-CFLAGS="-O2 -Wno-macro-redefined -isysroot $SDKROOT -arch arm64 -miphoneos-version-min=10.0"
 
-make TARGET=ARMV8 DYNAMIC_ARCH=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1
+make TARGET=ARMV8 DYNAMIC_ARCH=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1 \
+  CC="${CC}" CFLAGS="-O2 -Wno-macro-redefined -isysroot ${SDKROOT} -arch arm64 -miphoneos-version-min=10.0"
 ```
-Adjust `MIN_IOS_VERSION` as necessary for your installation. E.g., change the version number
+Adjust `-miphoneos-version-min` as necessary for your installation. E.g., change the version number
 to the minimum iOS version you want to target and execute this file to build the library.
 
 ### HarmonyOS