mdw@git.distorted.org.uk Git - tig/blob - acinclude.m4

   1 dnl From Bruno Haible.
   2 AC_DEFUN([AM_ICONV],
   3 [
   4   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
   5   dnl those with the standalone portable GNU libiconv installed).
   6
   7   AC_ARG_WITH([libiconv],
   8 [  --with-libiconv=DIR     search for libiconv in DIR/include and DIR/lib], [
   9     for dir in `echo "$withval" | tr : ' '`; do
  10       if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
  11       if test -d $dir/lib; then LDFLAGS="$LDFLAGS -L$dir/lib"; fi
  12     done
  13    ])
  14
  15   AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
  16     am_cv_func_iconv="no, consider installing GNU libiconv"
  17     am_cv_lib_iconv=no
  18     AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
  19 #include <iconv.h>]], [[iconv_t cd = iconv_open("","");
  20        iconv(cd,NULL,NULL,NULL,NULL);
  21        iconv_close(cd);]])],[am_cv_func_iconv=yes],[])
  22     if test "$am_cv_func_iconv" != yes; then
  23       am_save_LIBS="$LIBS"
  24       LIBS="$LIBS -liconv"
  25       AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
  26 #include <iconv.h>]], [[iconv_t cd = iconv_open("","");
  27          iconv(cd,NULL,NULL,NULL,NULL);
  28          iconv_close(cd);]])],[am_cv_lib_iconv=yes
  29         am_cv_func_iconv=yes],[])
  30       LIBS="$am_save_LIBS"
  31     fi
  32   ])
  33   if test "$am_cv_func_iconv" = yes; then
  34     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
  35     AC_MSG_CHECKING([for iconv declaration])
  36     AC_CACHE_VAL(am_cv_proto_iconv, [
  37       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  38 #include <stdlib.h>
  39 #include <iconv.h>
  40 extern
  41 #ifdef __cplusplus
  42 "C"
  43 #endif
  44 #if defined(__STDC__) || defined(__cplusplus)
  45 size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
  46 #else
  47 size_t iconv();
  48 #endif
  49 ]], [[]])],[am_cv_proto_iconv_arg1=""],[am_cv_proto_iconv_arg1="const"])
  50       am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
  51     am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
  52     AC_MSG_RESULT([$]{ac_t:-
  53          }[$]am_cv_proto_iconv)
  54     AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
  55       [Define as const if the declaration of iconv() needs const.])
  56   else
  57     AC_MSG_FAILURE([iconv() not found. Please install libiconv and use --with-libiconv=/path/to/dir.],[1])
  58   fi
  59   if test "$am_cv_lib_iconv" = yes; then
  60     LIBS="$LIBS -liconv"
  61   fi
  62 ])