utils/screen/patches/060-PATCH-4-4-Avoid-mis-identifying-systems-as-SVR4.patch

   1 From ec90292592dd2c9d5c108390841e3df24e377ed5 Mon Sep 17 00:00:00 2001
   2 From: Jussi Kukkonen <jussi.kukkonen@intel.com>
   3 Date: Sat, 24 Feb 2018 15:22:05 +0100
   4 Subject: [PATCH] [PATCH 4/4] Avoid mis-identifying systems as SVR4
   5
   6 Linux can be misdetected as SVR4 because it has
   7 libelf installed. This leads to linking with libelf, even though no
   8 symbols from that library were actually used, and to a workaround for
   9 a buggy getlogin() being enabled.
  10
  11 It is not documented which exact SVR4 system had the bug that the
  12 workaround was added for, so all I could do is make an educated guess
  13 at the #defines its compiler would be likely to set.
  14
  15 Modified from patch by Maarten ter Huurne.
  16
  17 Upstream-Status: Submitted [http://savannah.gnu.org/bugs/?43223]
  18
  19 Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
  20 ---
  21  configure.ac | 14 ++++++++++++--
  22  1 file changed, 12 insertions(+), 2 deletions(-)
  23
  24 diff --git a/src/configure.ac b/src/configure.ac
  25 index bd748d9..ab799d2 100644
  26 --- a/configure.ac
  27 +++ b/configure.ac
  28 @@ -179,14 +179,24 @@ AC_EGREP_CPP(YES_IS_DEFINED,
  29  #endif
  30  ], LIBS="$LIBS -lsocket -linet";seqptx=1)
  31
  32 +AC_CHECKING(SVR4)
  33 +AC_EGREP_CPP(yes,
  34 +[main () {
  35 +#if defined(SVR4) || defined(__SVR4)
  36 +  yes;
  37 +#endif
  38 +], AC_NOTE(- you have a SVR4 system) AC_DEFINE(SVR4) svr4=1)
  39 +if test -n "$svr4" ; then
  40  oldlibs="$LIBS"
  41  LIBS="$LIBS -lelf"
  42  AC_CHECKING(SVR4)
  43  AC_TRY_LINK([#include <utmpx.h>
  44  ],,
  45 -[AC_CHECK_HEADER(dwarf.h, AC_DEFINE(SVR4) AC_DEFINE(BUGGYGETLOGIN),
  46 -[AC_CHECK_HEADER(elf.h, AC_DEFINE(SVR4) AC_DEFINE(BUGGYGETLOGIN))])]
  47 +[AC_CHECK_HEADER(dwarf.h, AC_DEFINE(BUGGYGETLOGIN),
  48 +[AC_CHECK_HEADER(elf.h, AC_DEFINE(BUGGYGETLOGIN))])]
  49  ,LIBS="$oldlibs")
  50 +fi
  51 +
  52  AC_CHECK_HEADERS([stropts.h string.h strings.h])
  53
  54  AC_CHECKING(for Solaris 2.x)
  55 --
  56 2.17.1
  57