projects/sample/autoconf/m4/visibility_inlines_hidden.m4

   1 #
   2 # Determine if the compiler accepts -fvisibility-inlines-hidden
   3 #
   4 # This macro is specific to LLVM.
   5 #
   6 AC_DEFUN([AC_CXX_USE_VISIBILITY_INLINES_HIDDEN],
   7 [AC_CACHE_CHECK([for compiler -fvisibility-inlines-hidden option],
   8                 [llvm_cv_cxx_visibility_inlines_hidden],
   9 [ AC_LANG_PUSH([C++])
  10   oldcxxflags="$CXXFLAGS"
  11   CXXFLAGS="$CXXFLAGS -fvisibility-inlines-hidden"
  12   AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],
  13     [llvm_cv_cxx_visibility_inlines_hidden=yes],[llvm_cv_cxx_visibility_inlines_hidden=no])
  14   CXXFLAGS="$oldcxxflags"
  15   AC_LANG_POP([C++])
  16 ])
  17 if test "$llvm_cv_cxx_visibility_inlines_hidden" = yes ; then
  18   AC_SUBST([ENABLE_VISIBILITY_INLINES_HIDDEN],[1])
  19 else
  20   AC_SUBST([ENABLE_VISIBILITY_INLINES_HIDDEN],[0])
  21 fi
  22 ])