package/screen/0005-avoid-identifying-as-SVR4.patch

   1 From: Maarten ter Huurne <maarten@treewalker.org>
   2 Date: Sun, 14 Sep 2014 11:16:58 +0200
   3 Subject: Avoid mis-identifying systems as SVR4
   4
   5 My openSUSE 13.1 Linux system was detected as SVR4 because it had
   6 libelf installed. This leads to linking with libelf, even though no
   7 symbols from that library were actually used, and to a workaround for
   8 a buggy getlogin() being enabled.
   9
  10 It is not documented which exact SVR4 system had the bug that the
  11 workaround was added for, so all I could do is make an educated guess
  12 at the #defines its compiler would be likely to set.
  13
  14 Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
  15 [Ricardo: rebase on top of 4.3.1]
  16 Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
  17 ---
  18  configure.ac | 14 ++++++++++++--
  19  1 file changed, 12 insertions(+), 2 deletions(-)
  20
  21 diff --git a/configure.ac b/configure.ac
  22 index 9cf7cee..e09e4cf 100644
  23 --- a/configure.ac
  24 +++ b/configure.ac
  25 @@ -179,14 +179,24 @@ AC_EGREP_CPP(yes,
  26  #endif
  27  ], LIBS="$LIBS -lsocket -linet";seqptx=1)
  28
  29 +AC_CHECKING(SVR4)
  30 +AC_EGREP_CPP(yes,
  31 +[main () {
  32 +#if defined(SVR4) || defined(__SVR4)
  33 +  yes;
  34 +#endif
  35 +], AC_NOTE(- you have a SVR4 system) AC_DEFINE(SVR4) svr4=1)
  36 +if test -n "$svr4" ; then
  37  oldlibs="$LIBS"
  38  LIBS="$LIBS -lelf"
  39  AC_CHECKING(SVR4)
  40  AC_TRY_LINK([#include <utmpx.h>
  41  ],,
  42 -[AC_CHECK_HEADER(dwarf.h, AC_DEFINE(SVR4) AC_DEFINE(BUGGYGETLOGIN),
  43 -[AC_CHECK_HEADER(elf.h, AC_DEFINE(SVR4) AC_DEFINE(BUGGYGETLOGIN))])]
  44 +[AC_CHECK_HEADER(dwarf.h, AC_DEFINE(BUGGYGETLOGIN),
  45 +[AC_CHECK_HEADER(elf.h, AC_DEFINE(BUGGYGETLOGIN))])]
  46  ,LIBS="$oldlibs")
  47 +fi
  48 +
  49  AC_CHECK_HEADERS([stropts.h string.h strings.h])
  50
  51  AC_CHECKING(for Solaris 2.x)
  52 --
  53 1.8.4.5
  54