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 ---
  16  configure.in | 14 ++++++++++++--
  17  1 file changed, 12 insertions(+), 2 deletions(-)
  18
  19 diff --git a/configure.in b/configure.in
  20 index f78f81f..181b7f9 100644
  21 --- a/configure.in
  22 +++ b/configure.in
  23 @@ -178,14 +178,24 @@ AC_EGREP_CPP(yes,
  24  #endif
  25  ], LIBS="$LIBS -lsocket -linet";seqptx=1)
  26
  27 +AC_CHECKING(SVR4)
  28 +AC_EGREP_CPP(yes,
  29 +[main () {
  30 +#if defined(SVR4) || defined(__SVR4)
  31 +  yes;
  32 +#endif
  33 +], AC_NOTE(- you have a SVR4 system) AC_DEFINE(SVR4) svr4=1)
  34 +if test -n "$svr4" ; then
  35  oldlibs="$LIBS"
  36  LIBS="$LIBS -lelf"
  37  AC_CHECKING(SVR4)
  38  AC_TRY_LINK([#include <utmpx.h>
  39  ],,
  40 -[AC_CHECK_HEADER(dwarf.h, AC_DEFINE(SVR4) AC_DEFINE(BUGGYGETLOGIN),
  41 -[AC_CHECK_HEADER(elf.h, AC_DEFINE(SVR4) AC_DEFINE(BUGGYGETLOGIN))])]
  42 +[AC_CHECK_HEADER(dwarf.h, AC_DEFINE(BUGGYGETLOGIN),
  43 +[AC_CHECK_HEADER(elf.h, AC_DEFINE(BUGGYGETLOGIN))])]
  44  ,LIBS="$oldlibs")
  45 +fi
  46 +
  47  AC_CHECK_HEADERS([stropts.h string.h strings.h])
  48
  49  AC_CHECKING(for Solaris 2.x)
  50 --
  51 1.8.4.5
  52