acinclude.m4

   1 dnl BISON_DEFINE_FILE(VARNAME, FILE)
   2 dnl Defines (with AC_DEFINE) VARNAME to the expansion of the FILE
   3 dnl variable, expanding ${prefix} and such.
   4 dnl Example: BISON_DEFINE_FILE(DATADIR, datadir)
   5 dnl By Alexandre Oliva <oliva@dcc.unicamp.br>
   6 AC_DEFUN(BISON_DEFINE_FILE, [
   7         ac_expanded=`(
   8             test "x$prefix" = xNONE && prefix="$ac_default_prefix"
   9             test "x$exec_prefix" = xNONE && exec_prefix="${prefix}"
  10             eval echo \""[$]$2"\"
  11         )`
  12         AC_DEFINE_UNQUOTED($1, "$ac_expanded")
  13 ])
  14
  15 dnl See whether we need a declaration for a function.
  16 dnl BISON_NEED_DECLARATION(FUNCTION [, EXTRA-HEADER-FILES])
  17 AC_DEFUN(BISON_NEED_DECLARATION,
  18 [AC_MSG_CHECKING([whether $1 must be declared])
  19 AC_CACHE_VAL(bison_cv_decl_needed_$1,
  20 [AC_TRY_COMPILE([
  21 #include <stdio.h>
  22 #ifdef HAVE_STRING_H
  23 #include <string.h>
  24 #else
  25 #ifdef HAVE_STRINGS_H
  26 #include <strings.h>
  27 #endif
  28 #endif
  29 #ifdef HAVE_STDLIB_H
  30 #include <stdlib.h>
  31 #endif
  32 #ifdef HAVE_UNISTD_H
  33 #include <unistd.h>
  34 #endif
  35 #ifndef HAVE_RINDEX
  36 #define rindex strrchr
  37 #endif
  38 #ifndef HAVE_INDEX
  39 #define index strchr
  40 #endif
  41 $2],
  42 [char *(*pfn) = (char *(*)) $1],
  43 eval "bison_cv_decl_needed_$1=no", eval "bison_cv_decl_needed_$1=yes")])
  44 if eval "test \"`echo '$bison_cv_decl_needed_'$1`\" = yes"; then
  45   AC_MSG_RESULT(yes)
  46   bison_tr_decl=NEED_DECLARATION_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
  47   AC_DEFINE_UNQUOTED($bison_tr_decl)
  48 else
  49   AC_MSG_RESULT(no)
  50 fi
  51 ])dnl
  52
  53 dnl Check multiple functions to see whether each needs a declaration.
  54 dnl BISON_NEED_DECLARATIONS(FUNCTION... [, EXTRA-HEADER-FILES])
  55 AC_DEFUN(BISON_NEED_DECLARATIONS,
  56 [for ac_func in $1
  57 do
  58 BISON_NEED_DECLARATION($ac_func, $2)
  59 done
  60 ])