libphobos/m4/autoconf.m4

   1 #
   2 # Minimal autoconf support for the D language.
   3 # Adapted from the Go language support files.
   4 #
   5
   6 # ------------------- #
   7 # Language selection.
   8 # ------------------- #
   9
  10 # AC_LANG(D)
  11 # -----------
  12 AC_LANG_DEFINE([D], [d], [GDC], [GDC], [],
  13 [ac_ext=d
  14 ac_compile='$GDC -c $GDCFLAGS conftest.$ac_ext >&AS_MESSAGE_LOG_FD'
  15 ac_link='$GDC -o conftest$ac_exeext $GDCFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&AS_MESSAGE_LOG_FD'
  16 ac_compiler_gnu=yes
  17 ])
  18
  19 # AC_LANG_D
  20 # ----------
  21 AU_DEFUN([AC_LANG_D], [AC_LANG(D)])
  22
  23 # ------------------- #
  24 # Producing programs.
  25 # ------------------- #
  26
  27 # AC_LANG_PROGRAM(D)([PROLOGUE], [BODY])
  28 # ---------------------------------------
  29 m4_define([AC_LANG_PROGRAM(D)],
  30 [module mod;
  31 $1
  32
  33 extern(C) int main() {
  34   $2
  35 }])
  36
  37 # _AC_LANG_IO_PROGRAM(D)
  38 # -----------------------
  39 # Produce source that performs I/O.
  40 m4_define([_AC_LANG_IO_PROGRAM(D)],
  41 [AC_LANG_PROGRAM([import core.stdc.stdio;],
  42 [FILE *f = fopen ("conftest.out", "w");
  43  return ferror (f) || fclose (f) != 0;
  44 ])])
  45
  46 # AC_LANG_CALL(D)(PROLOGUE, FUNCTION)
  47 # ------------------------------------
  48 # TODO: Avoid conflicting decl of main?
  49 # Used by AC_SEARCH_LIBS.
  50 m4_define([AC_LANG_CALL(D)],
  51 [AC_LANG_PROGRAM([$1 extern(C) int $2();], [$2(); return 0;])])
  52
  53 # AC_LANG_FUNC_LINK_TRY(D)(FUNCTION)
  54 # -----------------------------------
  55 # Try to link a program which calls FUNCTION.
  56 # This only works for extern(C) functions.
  57 m4_define([AC_LANG_FUNC_LINK_TRY(D)],
  58 [AC_LANG_PROGRAM([extern(C) int $1();], [return $1();])])
  59
  60 # AC_LANG_BOOL_COMPILE_TRY(D)(PROLOGUE, EXPRESSION)
  61 # --------------------------------------------------
  62 # Return a program which is valid if EXPRESSION is nonzero.
  63 # Probably not that useful for D, we can extract any information
  64 # we need using CTFE.
  65 m4_define([AC_LANG_BOOL_COMPILE_TRY(D)],
  66 [AC_LANG_PROGRAM([$1],
  67 [static assert($2); return 0;])])
  68
  69 # AC_LANG_INT_SAVE(D)(PROLOGUE, EXPRESSION)
  70 # ------------------------------------------
  71 m4_define([AC_LANG_INT_SAVE(D)],
  72 [AC_LANG_PROGRAM([$1
  73 import core.stdc.stdio, core.stdc.stdlib;
  74 ],
  75 [
  76   FILE *f = fopen ("conftest.val", "w");
  77   if (! f)
  78     return 1;
  79   if (($2) < 0)
  80     {
  81       fprintf (f, "%ld", $2);
  82     }
  83   else
  84     {
  85       fprintf (f, "%lu", $2);
  86     }
  87   /* Do not output a trailing newline, as this causes \r\n confusion
  88      on some platforms.  */
  89   return ferror (f) || fclose (f) != 0;
  90 ])])
  91
  92 # ---------------------- #
  93 # Looking for compilers. #
  94 # ---------------------- #
  95
  96 # AC_LANG_COMPILER(D)
  97 # --------------------
  98 AC_DEFUN([AC_LANG_COMPILER(D)],
  99 [AC_REQUIRE([AC_PROG_GDC])])
 100
 101 # AC_PROG_GDC
 102 # ----------
 103 AN_MAKEVAR([GDC], [AC_PROG_GDC])
 104 AN_PROGRAM([gdc], [AC_PROG_GDC])
 105 AC_DEFUN([AC_PROG_GDC],
 106 [AC_LANG_PUSH(D)dnl
 107 AC_ARG_VAR([GDC],     [D compiler command])dnl
 108 AC_ARG_VAR([GDCFLAGS],  [D compiler flags])dnl
 109 _AC_ARG_VAR_LDFLAGS()dnl
 110 m4_ifval([$1],
 111       [AC_CHECK_TOOLS(GDC, [$1])],
 112 [AC_CHECK_TOOL(GDC, gdc)
 113 if test -z "$GDC"; then
 114   if test -n "$ac_tool_prefix"; then
 115     AC_CHECK_PROG(GDC, [${ac_tool_prefix}gdc], [$ac_tool_prefix}gdc])
 116   fi
 117 fi
 118 if test -z "$GDC"; then
 119   AC_CHECK_PROG(GDC, gdc, gdc, , , false)
 120 fi
 121 ])
 122
 123 # Provide some information about the compiler.
 124 _AS_ECHO_LOG([checking for _AC_LANG compiler version])
 125 set X $ac_compile
 126 ac_compiler=$[2]
 127 _AC_DO_LIMIT([$ac_compiler --version >&AS_MESSAGE_LOG_FD])
 128 m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
 129 m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
 130 AC_LANG_POP(D)dnl
 131 ])# AC_PROG_D
 132