[GitHub] [trafficserver] randall edited a comment on pull request #7786: Enables cross-compiling

[GitBox <gi...@apache.org>]

randall edited a comment on pull request #7786:
URL: https://github.com/apache/trafficserver/pull/7786#issuecomment-832981167


   
   my testing consisted of cross-compiling on x86_64 macOS targeting arm64.
   
   The environment vars I set along with the host value in testing:
   ```
   CFLAGS='-target arm64-apple-macos'; export CFLAGS
   CXXFLAGS='-target arm64-apple-macos'; export CXXFLAGS
   CPPFLAGS="-target arm64-apple-macos -I/opt/arm64/include"; export CPPFLAGS
   LDFLAGS="-target arm64-apple-macos -L/opt/arm64/lib"; export LDFLAGS
   AM_LDFLAGS="-Xcompiler -target -Xcompiler arm64-apple-macos"; export AM_LDFLAGS
   CC=clang; export CC
   CXX=clang++; export CXX
   ./configure \
   --host=x86_64-apple-darwin \
   --with-openssl=/opt/arm64 \
   --with-pcre=/opt/arm64
   ```
   
   (I'm not saying those are required, I just tested with those).
   
   
   This might've addressed some of the issues described in #7754
   
   To test targeting arm64 macOS on x86_64 host, you'll need to build OpenSSL and PCRE (at minimum). I installed my dependencies under `/opt/arm64`
   
   For PCRE:
   ```
   CFLAGS='-target arm64-apple-macos'; export CFLAGS
   CPPFLAGS='-target arm64-apple-macos'; export CPPFLAGS
   CXXFLAGS='-target arm64-apple-macos'; export CXXFLAGS
   LDFLAGS='-target arm64-apple-macos'; export LDFLAGS
   CC=clang; export CC
   CXX=clang++; export CXX
   ./configure \
   --prefix=/opt/arm64 \
   --host=x86_64-apple-darwin \
   --disable-dependency-tracking \
   --disable-silent-rules \
   --disable-cpp \
   --enable-shared=no
   make && make install
   ```
   
   For OpenSSL:
   ```
   ./Configure --prefix=/opt/arm64 darwin64-arm64-cc 
   make && make install
   ```


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