config/gxx-include-dir.m4

   1 dnl Usage: TL_AC_GXX_INCLUDE_DIR
   2 dnl
   3 dnl Set $gxx_include_dir to the location of the installed C++ include
   4 dnl directory.  The value depends on $gcc_version and the configuration
   5 dnl options --with-gxx-include-dir and --enable-version-specific-runtime-libs.
   6 dnl
   7 dnl If you change the default here, you'll need to change the gcc and
   8 dnl libstdc++-v3 subdirectories too.
   9 AC_DEFUN([TL_AC_GXX_INCLUDE_DIR],
  10 [
  11 case "${with_gxx_include_dir}" in
  12   yes)
  13     AC_MSG_ERROR([--with-gxx-include-dir=[[dir]] requires a directory])
  14     ;;
  15   no | "")
  16     case "${enable_version_specific_runtime_libs}" in
  17       yes) gxx_include_dir='$(libsubdir)/include/c++' ;;
  18       *)
  19         libstdcxx_incdir='c++/$(gcc_version)'
  20         gxx_include_dir='$(prefix)/include/$(libstdcxx_incdir)' ;;
  21     esac ;;
  22   *) gxx_include_dir=${with_gxx_include_dir} ;;
  23 esac
  24 AC_SUBST(gxx_include_dir)
  25 AC_SUBST(libstdcxx_incdir)
  26 ])