| # |
| # Determine if the compiler accepts -fvisibility-inlines-hidden |
| # |
| # This macro is specific to LLVM. |
| # |
| AC_DEFUN([AC_CXX_USE_VISIBILITY_INLINES_HIDDEN], |
| [AC_CACHE_CHECK([for compiler -fvisibility-inlines-hidden option], |
| [llvm_cv_cxx_visibility_inlines_hidden], |
| [ AC_LANG_PUSH([C++]) |
| oldcxxflags="$CXXFLAGS" |
| CXXFLAGS="$CXXFLAGS -O0 -fvisibility-inlines-hidden -Werror" |
| AC_COMPILE_IFELSE([AC_LANG_PROGRAM( |
| [template <typename T> struct X { void __attribute__((noinline)) f() {} };], |
| [X<int>().f();])], |
| [llvm_cv_cxx_visibility_inlines_hidden=yes],[llvm_cv_cxx_visibility_inlines_hidden=no]) |
| CXXFLAGS="$oldcxxflags" |
| AC_LANG_POP([C++]) |
| ]) |
| if test "$llvm_cv_cxx_visibility_inlines_hidden" = yes ; then |
| AC_SUBST([ENABLE_VISIBILITY_INLINES_HIDDEN],[1]) |
| else |
| AC_SUBST([ENABLE_VISIBILITY_INLINES_HIDDEN],[0]) |
| fi |
| ]) |
