m4.include/mc-with-screen-slang.m4

   1
   2 dnl Check the header
   3 AC_DEFUN([MC_CHECK_SLANG_HEADER], [
   4     AC_MSG_CHECKING([for slang/slang.h])
   5     AC_PREPROC_IFELSE(
   6         [
   7             AC_LANG_PROGRAM([#include <slang/slang.h>], [return 0;])
   8         ],
   9         [
  10             AC_MSG_RESULT(yes)
  11             AC_DEFINE(HAVE_SLANG_SLANG_H, 1, [Define to use slang.h])
  12             found_slang=yes
  13         ],
  14         [
  15             AC_MSG_RESULT(no)
  16         ]
  17     )
  18 ])
  19
  20 dnl
  21 dnl Check if the system S-Lang library can be used.
  22 dnl If not, and $1 is "strict", exit.
  23 dnl
  24 AC_DEFUN([MC_CHECK_SLANG_BY_PATH], [
  25
  26     param_slang_inc_path=[$1]
  27     param_slang_lib_path=[$2]
  28
  29     if test x"$param_slang_inc_path" != x; then
  30         ac_slang_inc_path="-I"$param_slang_inc_path
  31     fi
  32
  33     if test x"$param_slang_lib_path" != x; then
  34         ac_slang_lib_path="-L"$param_slang_lib_path
  35     fi
  36
  37     saved_CPPFLAGS="$CPPFLAGS"
  38     saved_LDFLAGS="$LDFLAGS"
  39
  40     CPPFLAGS="$saved_CPPFLAGS $ac_slang_inc_path"
  41     LDFLAGS="$saved_LDFLAGS $ac_slang_lib_path"
  42
  43     AC_MSG_CHECKING([for slang.h])
  44     AC_PREPROC_IFELSE(
  45         [
  46             AC_LANG_PROGRAM([#include <slang.h>], [return 0;])
  47         ],
  48         [
  49             AC_MSG_RESULT(yes)
  50             if test x"$ac_slang_inc_path" = x; then
  51                 ac_slang_inc_path="-I/usr/include"
  52             fi
  53             if test x"$ac_slang_lib_path" = x; then
  54                 ac_slang_lib_path="-L/usr/lib"
  55             fi
  56             found_slang=yes
  57             AC_DEFINE(HAVE_SLANG_H, 1, [Define to use slang.h])
  58
  59         ],
  60         [
  61             AC_MSG_RESULT(no)
  62
  63             MC_CHECK_SLANG_HEADER
  64             if test x"$found_slang" = xno; then
  65                 error_msg_slang="S-Lang header not found"
  66             else
  67                 if test x"$ac_slang_inc_path" = x; then
  68                     ac_slang_inc_path="-I/usr/include"
  69                 fi
  70                 if test x"$ac_slang_lib_path" = x; then
  71                     ac_slang_lib_path="-L/usr/lib"
  72                 fi
  73                 CPPFLAGS="-DHAVE_SLANG_SLANG_H $CPPFLAGS"
  74             fi
  75         ],
  76     )
  77     dnl check if S-Lang have version 2.0 or newer
  78     if test x"$found_slang" = x"yes"; then
  79         AC_MSG_CHECKING([for S-Lang version 2.0 or newer])
  80         AC_RUN_IFELSE([AC_LANG_SOURCE([
  81 #ifdef HAVE_SLANG_SLANG_H
  82 #include <slang/slang.h>
  83 #else
  84 #include <slang.h>
  85 #endif
  86 int main (void)
  87 {
  88 #if SLANG_VERSION >= 20000
  89     return 0;
  90 #else
  91     return 1;
  92 #endif
  93 }
  94 ])],
  95             [mc_slang_is_valid_version=yes],
  96             [mc_slang_is_valid_version=no],
  97             [
  98             if test -f "$param_slang_inc_path/slang/slang.h" ; then
  99                 hdr_file="$param_slang_inc_path/slang/slang.h"
 100             else
 101                 hdr_file="$param_slang_inc_path/slang.h"
 102             fi
 103             mc_slang_is_valid_version=`grep '^#define SLANG_VERSION[[:space:]]' "$hdr_file"| sed s'/^#define SLANG_VERSION[[:space:]]*//'`
 104             if test "$mc_slang_is_valid_version" -ge "20000"; then
 105                 mc_slang_is_valid_version=yes
 106             else
 107                 mc_slang_is_valid_version=no
 108             fi
 109             ]
 110         )
 111         if test x$mc_slang_is_valid_version = xno; then
 112             found_slang=no
 113             error_msg_slang="S-Lang library version 2.0 or newer not found"
 114         fi
 115         AC_MSG_RESULT($mc_slang_is_valid_version)
 116     fi
 117     dnl Check if termcap is needed.
 118     dnl This check must be done before anything is linked against S-Lang.
 119     if test x"$found_slang" = x"yes"; then
 120         MC_SLANG_TERMCAP
 121         if test x"$mc_cv_slang_termcap"  = x"yes"; then
 122             saved_CPPFLAGS="$saved_CPPFLAGS "
 123             saved_LDFLAGS="-ltermcap $saved_LDFLAGS"
 124         fi
 125
 126         dnl Check the library
 127         unset ac_cv_lib_slang_SLang_init_tty
 128         AC_CHECK_LIB(
 129             [slang],
 130             [SLang_init_tty],
 131             [:],
 132             [
 133                 found_slang=no
 134                 error_msg_slang="S-Lang library not found"
 135             ]
 136         )
 137     fi
 138
 139     if test x"$found_slang" = x"yes"; then
 140         screen_type=slang
 141         screen_msg="S-Lang library"
 142
 143         MCLIBS="$ac_slang_lib_path -lslang $MCLIBS"
 144         dnl do not reset CPPFLAGS
 145         dnl if CPPFLAGS are reset then cpp does not find the specified header
 146         CPPFLAGS="$ac_slang_inc_path $saved_CPPFLAGS"
 147         LDFLAGS="$saved_LDFLAGS"
 148     else
 149         CPPFLAGS="$saved_CPPFLAGS"
 150         LDFLAGS="$saved_LDFLAGS"
 151     fi
 152 ])
 153
 154 dnl
 155 dnl Use the slang library.
 156 dnl
 157 AC_DEFUN([MC_WITH_SLANG], [
 158     with_screen=slang
 159     found_slang=yes
 160     error_msg_slang=""
 161
 162     AC_ARG_WITH([slang-includes],
 163         AS_HELP_STRING([--with-slang-includes=@<:@DIR@:>@],
 164             [set path to S-Lang includes @<:@default=/usr/include@:>@; make sense only if --with-screen=slang]
 165         ),
 166         [ac_slang_inc_path="$withval"],
 167         [ac_slang_inc_path=""]
 168     )
 169
 170     AC_ARG_WITH([slang-libs],
 171         AS_HELP_STRING([--with-slang-libs=@<:@DIR@:>@],
 172             [set path to S-Lang library @<:@default=/usr/lib@:>@; make sense only if --with-screen=slang]
 173         ),
 174         [ac_slang_lib_path="$withval"],
 175         [ac_slang_lib_path=""]
 176     )
 177     if test x"$ac_slang_lib_path" != x -o x"$ac_slang_inc_path" != x; then
 178         echo 'checking S-Lang headers in specified place ...'
 179         MC_CHECK_SLANG_BY_PATH([$ac_slang_inc_path],[$ac_slang_lib_path])
 180     else
 181         found_slang=no
 182         PKG_CHECK_MODULES(SLANG, [slang >= 2.0], [found_slang=yes], [:])
 183         if test x"$found_slang" = "xyes"; then
 184             MCLIBS="$pkg_cv_SLANG_LIBS $MCLIBS"
 185             CPPFLAGS="$pkg_cv_SLANG_CFLAGS $CPPFLAGS"
 186         fi
 187     fi
 188
 189     if test x"$found_slang" = "xno"; then
 190         found_slang=yes
 191         ac_slang_inc_path="/usr/include"
 192         ac_slang_lib_path="/usr/lib"
 193
 194         echo 'checking S-Lang headers in /usr ...'
 195         MC_CHECK_SLANG_BY_PATH([$ac_slang_inc_path],[$ac_slang_lib_path])
 196         if test x"$found_slang" = "xno"; then
 197             found_slang=yes
 198             ac_slang_inc_path="/usr/local/include"
 199             ac_slang_lib_path="/usr/local/lib"
 200
 201             echo 'checking S-Lang headers in /usr/local ...'
 202             MC_CHECK_SLANG_BY_PATH( $ac_slang_inc_path , $ac_slang_lib_path )
 203             if test x"$found_slang" = "xno"; then
 204                 AC_MSG_ERROR([$error_msg_slang])
 205             fi
 206         fi
 207     fi
 208
 209     AC_DEFINE(HAVE_SLANG, 1, [Define to use S-Lang library for screen management])
 210
 211     MC_CHECK_SLANG_HEADER
 212 ])