config.m4

dnl config.m4 for extension ext_math

PHP_ARG_ENABLE(ext_math, whether to enable ext_math support,
[  --enable-ext-math                       Enable native pocketmine\math extension])

if test "$PHP_EXT_MATH" != "no"; then
  PHP_REQUIRE_CXX()

  dnl Detect C++23 support (-std=c++23, fallback -std=c++2b for older toolchains)
  AC_LANG_PUSH([C++])
  EXT_MATH_SAVED_CXXFLAGS="$CXXFLAGS"
  EXT_MATH_STD_FLAG=""
  for ext_math_flag in "-std=c++23" "-std=c++2b"; do
    if test -z "$EXT_MATH_STD_FLAG"; then
      CXXFLAGS="$EXT_MATH_SAVED_CXXFLAGS $ext_math_flag"
      AC_MSG_CHECKING([whether $CXX supports $ext_math_flag])
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
        #if __cplusplus < 202100L
        #error "compiler does not target C++23"
        #endif
      ]], [[]])], [
        AC_MSG_RESULT([yes])
        EXT_MATH_STD_FLAG="$ext_math_flag"
      ], [
        AC_MSG_RESULT([no])
      ])
    fi
  done
  CXXFLAGS="$EXT_MATH_SAVED_CXXFLAGS"
  AC_LANG_POP([C++])

  if test -z "$EXT_MATH_STD_FLAG"; then
    AC_MSG_ERROR([ext_math requires a C++23-capable compiler (GCC 13+ or Clang 17+)])
  fi

  dnl the 6th parameter here is required for C++ shared extensions
  PHP_NEW_EXTENSION(ext_math, ext_math.cpp src/PhpAxis.cpp src/PhpFacing.cpp src/PhpMath.cpp src/PhpVector2.cpp src/PhpVector3.cpp src/PhpVectorMath.cpp src/PhpRayTraceResult.cpp src/PhpAxisAlignedBB.cpp src/PhpMatrix.cpp src/PhpVoxelRayTrace.cpp, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -fno-strict-aliasing, yes)
  PHP_SUBST(EXT_MATH_SHARED_LIBADD)

  dnl .cpp sources are compiled with $(CXX) $(CXXFLAGS) $(EXTRA_CXXFLAGS) in Makefile.global
  EXTRA_CXXFLAGS="$EXT_MATH_STD_FLAG"
  PHP_SUBST(EXTRA_CXXFLAGS)

  PHP_ADD_BUILD_DIR($ext_builddir/src, 1)
  PHP_ADD_INCLUDE($ext_builddir)
fi