1 https://bugs.gentoo.org/601426

     2 https://lists.gnu.org/archive/html/bug-ncurses/2015-02/msg00012.html

     3 

     4 From: John Vogel

     5 Subject: [PATCH] c++ binding missed when cross compiling

     6 Date: Mon, 16 Feb 2015 01:01:48 -0500

     7 

     8 The configure script hard codes the include dir to the prefix'ed include dir,

     9 when checking if c++ compiler works. This breaks the compiler's built-in search

    10 path. I've included two patches. The first works on the configure.in file, which

    11 requires your autoconf stuff to test and I'm not ready to meddle with at the

    12 moment. The other works directly on the configure file. I've tested the second

    13 one; it should mirror what the first patch tries to achieve and works for me.

    14 

    15 --- a/configure

    16 +++ b/configure

    17 @@ -2938,10 +2938,6 @@

    18  		echo "$as_me:2938: checking if $CXX works" >&5

    19  echo $ECHO_N "checking if $CXX works... $ECHO_C" >&6

    20  

    21 -		save_CPPFLAGS="$CPPFLAGS"

    22 -		eval cf_includedir=${includedir}

    23 -		CPPFLAGS="$CPPFLAGS -I${cf_includedir}"

    24 -

    25  cat >conftest.$ac_ext <<_ACEOF

    26  #line 2946 "configure"

    27  #include "confdefs.h"

    28 @@ -2978,7 +2974,6 @@

    29  cf_cxx_works=no

    30  fi

    31  rm -f conftest.$ac_objext conftest.$ac_ext

    32 -		CPPFLAGS="$save_CPPFLAGS"

    33  

    34  		echo "$as_me:2983: result: $cf_cxx_works" >&5

    35  echo "${ECHO_T}$cf_cxx_works" >&6