X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ficonv.m4;h=654c41589436ee916892e9820bfe436336ecad33;hb=95d2aaeab5b8caa01c776d3afa097220cd8982b9;hp=ee8cf299569b7da33d81364d71ede47ec2b03332;hpb=d4e496316c84fbbab23b0105dcc2aff74aa4efce;p=gnulib.git

diff --git a/m4/iconv.m4 b/m4/iconv.m4
index ee8cf2995..654c41589 100644
--- a/m4/iconv.m4
+++ b/m4/iconv.m4
@@ -1,37 +1,83 @@
-#serial 2
+# iconv.m4 serial AM4 (gettext-0.11.3)
+dnl Copyright (C) 2000-2002 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
 
 dnl From Bruno Haible.
 
-AC_DEFUN(jm_ICONV,
+AC_DEFUN([AM_ICONV_LINKFLAGS_BODY],
+[
+  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
+  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+  AC_REQUIRE([AC_LIB_RPATH])
+
+  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
+  dnl accordingly.
+  AC_LIB_LINKFLAGS_BODY([iconv])
+])
+
+AC_DEFUN([AM_ICONV_LINK],
 [
   dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
-  dnl those with the standalone portable libiconv installed).
-  AC_CACHE_CHECK(for iconv, jm_cv_func_iconv, [
-    jm_cv_func_iconv="no, consider installing libiconv"
-    jm_cv_lib_iconv=no
+  dnl those with the standalone portable GNU libiconv installed).
+
+  dnl Search for libiconv and define LIBICONV, LTLIBICONV and INCICONV
+  dnl accordingly.
+  AC_REQUIRE([AM_ICONV_LINKFLAGS_BODY])
+
+  dnl Add $INCICONV to CPPFLAGS before performing the following checks,
+  dnl because if the user has installed libiconv and not disabled its use
+  dnl via --without-libiconv-prefix, he wants to use it. The first
+  dnl AC_TRY_LINK will then fail, the second AC_TRY_LINK will succeed.
+  am_save_CPPFLAGS="$CPPFLAGS"
+  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV])
+
+  AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
+    am_cv_func_iconv="no, consider installing GNU libiconv"
+    am_cv_lib_iconv=no
     AC_TRY_LINK([#include <stdlib.h>
 #include <iconv.h>],
       [iconv_t cd = iconv_open("","");
        iconv(cd,NULL,NULL,NULL,NULL);
        iconv_close(cd);],
-      jm_cv_func_iconv=yes)
-    if test "$jm_cv_func_iconv" != yes; then
-      jm_save_LIBS="$LIBS"
-      LIBS="$LIBS -liconv"
+      am_cv_func_iconv=yes)
+    if test "$am_cv_func_iconv" != yes; then
+      am_save_LIBS="$LIBS"
+      LIBS="$LIBS $LIBICONV"
       AC_TRY_LINK([#include <stdlib.h>
 #include <iconv.h>],
         [iconv_t cd = iconv_open("","");
          iconv(cd,NULL,NULL,NULL,NULL);
          iconv_close(cd);],
-        jm_cv_lib_iconv=yes
-        jm_cv_func_iconv=yes)
-      LIBS="$jm_save_LIBS"
+        am_cv_lib_iconv=yes
+        am_cv_func_iconv=yes)
+      LIBS="$am_save_LIBS"
     fi
   ])
-  if test "$jm_cv_func_iconv" = yes; then
+  if test "$am_cv_func_iconv" = yes; then
     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
+  fi
+  if test "$am_cv_lib_iconv" = yes; then
+    AC_MSG_CHECKING([how to link with libiconv])
+    AC_MSG_RESULT([$LIBICONV])
+  else
+    dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV
+    dnl either.
+    CPPFLAGS="$am_save_CPPFLAGS"
+    LIBICONV=
+    LTLIBICONV=
+  fi
+  AC_SUBST(LIBICONV)
+  AC_SUBST(LTLIBICONV)
+])
+
+AC_DEFUN([AM_ICONV],
+[
+  AM_ICONV_LINK
+  if test "$am_cv_func_iconv" = yes; then
     AC_MSG_CHECKING([for iconv declaration])
-    AC_CACHE_VAL(jm_cv_proto_iconv, [
+    AC_CACHE_VAL(am_cv_proto_iconv, [
       AC_TRY_COMPILE([
 #include <stdlib.h>
 #include <iconv.h>
@@ -40,21 +86,16 @@ extern
 "C"
 #endif
 #if defined(__STDC__) || defined(__cplusplus)
-size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t* outbytesleft);
+size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
 #else
 size_t iconv();
 #endif
-], [], jm_cv_proto_iconv_arg1="", jm_cv_proto_iconv_arg1="const")
-      jm_cv_proto_iconv="extern size_t iconv (iconv_t cd, $jm_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t* outbytesleft);"])
-    jm_cv_proto_iconv=`echo "[$]jm_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
+], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
+      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
+    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
     AC_MSG_RESULT([$]{ac_t:-
-         }[$]jm_cv_proto_iconv)
-    AC_DEFINE_UNQUOTED(ICONV_CONST, $jm_cv_proto_iconv_arg1,
+         }[$]am_cv_proto_iconv)
+    AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
       [Define as const if the declaration of iconv() needs const.])
   fi
-  LIBICONV=
-  if test "$jm_cv_lib_iconv" = yes; then
-    LIBICONV="-liconv"
-  fi
-  AC_SUBST(LIBICONV)
 ])