[PATCH for-4.19 5/6] build: Drop libiconv as a build dependecy

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

The final user was blktap2, removed in Xen 4.13.

Strip out the ./configure check for it, and stop explicitly installing it in
the FreeBSD testing.

Fixes: 2a556b63a22d ("Drop blktap2")
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>
CC: Juergen Gross <jgross@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Julien Grall <julien@xxxxxxx>
CC: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
 .cirrus.yml        |  2 +-
 config/Tools.mk.in |  1 -
 tools/configure    | 44 --------------------------------------------
 tools/configure.ac |  2 --
 4 files changed, 1 insertion(+), 48 deletions(-)

diff --git a/.cirrus.yml b/.cirrus.yml
index c431d8d2447d..72227916c736 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -5,7 +5,7 @@ freebsd_template: &FREEBSD_TEMPLATE
     APPEND_INCLUDES: /usr/local/include
 
   install_script: pkg install -y seabios gmake ninja bash
-                                 pkgconf python libiconv bison perl5
+                                 pkgconf python bison perl5
                                  yajl lzo2 pixman argp-standalone
                                  libxml2 glib git
 
diff --git a/config/Tools.mk.in b/config/Tools.mk.in
index 50fbef841f3f..37c071961e57 100644
--- a/config/Tools.mk.in
+++ b/config/Tools.mk.in
@@ -61,7 +61,6 @@ LINUX_BACKEND_MODULES := @LINUX_BACKEND_MODULES@
 #System options
 ZLIB_CFLAGS         := @ZLIB_CFLAGS@
 ZLIB_LIBS           := @ZLIB_LIBS@
-CONFIG_LIBICONV     := @libiconv@
 EXTFS_LIBS          := @EXTFS_LIBS@
 CURSES_LIBS         := @CURSES_LIBS@
 TINFO_LIBS          := @TINFO_LIBS@
diff --git a/tools/configure b/tools/configure
index d160ca296202..d64818f258d0 100755
--- a/tools/configure
+++ b/tools/configure
@@ -659,7 +659,6 @@ libnl
 LIBNL3_LIBS
 LIBNL3_CFLAGS
 argp_ldflags
-libiconv
 PTHREAD_LIBS
 PTHREAD_LDFLAGS
 PTHREAD_CFLAGS
@@ -9741,49 +9740,6 @@ else $as_nop
   as_fn_error $? "Could not find zlib" "$LINENO" 5
 fi
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libiconv_open in 
-liconv" >&5
-printf %s "checking for libiconv_open in -liconv... " >&6; }
-if test ${ac_cv_lib_iconv_libiconv_open+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-liconv  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char libiconv_open ();
-int
-main (void)
-{
-return libiconv_open ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"
-then :
-  ac_cv_lib_iconv_libiconv_open=yes
-else $as_nop
-  ac_cv_lib_iconv_libiconv_open=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: 
$ac_cv_lib_iconv_libiconv_open" >&5
-printf "%s\n" "$ac_cv_lib_iconv_libiconv_open" >&6; }
-if test "x$ac_cv_lib_iconv_libiconv_open" = xyes
-then :
-  libiconv="y"
-else $as_nop
-  libiconv="n"
-fi
-
-
 ac_fn_c_check_header_compile "$LINENO" "argp.h" "ac_cv_header_argp_h" 
"$ac_includes_default"
 if test "x$ac_cv_header_argp_h" = xyes
 then :
diff --git a/tools/configure.ac b/tools/configure.ac
index be58f06be450..0dd6d747abb5 100644
--- a/tools/configure.ac
+++ b/tools/configure.ac
@@ -444,8 +444,6 @@ AX_CHECK_PTHREAD
 AC_CHECK_LIB([yajl], [yajl_alloc], [],
     [AC_MSG_ERROR([Could not find yajl])])
 AC_CHECK_LIB([z], [deflateCopy], [], [AC_MSG_ERROR([Could not find zlib])])
-AC_CHECK_LIB([iconv], [libiconv_open], [libiconv="y"], [libiconv="n"])
-AC_SUBST(libiconv)
 AC_CHECK_HEADER([argp.h], [
 AC_CHECK_LIB([argp], [argp_usage], [argp_ldflags="-largp"])
 ], [AC_MSG_ERROR([Could not find argp])])
-- 
2.39.2