commit ad325943017c7ba0e371791360a81567b577e10e
Author: Georg Baum <[email protected]>
Date:   Thu May 5 19:43:24 2016 +0200

    Configure included iconv with autotools
    
    The included iconv should not be used on Linux or OS X, but (depending on
    local configuration) it might be needed for crosscompiling a mingw target
    from Linux. Now the user can choose whether to use the included iconv or 
not.
    cmake does already support that.
    
    eilseq.m4 was taken from the original libiconv 1.14 package.

diff --git a/3rdparty/Makefile.am b/3rdparty/Makefile.am
index 54ab6c4..f936a4c 100644
--- a/3rdparty/Makefile.am
+++ b/3rdparty/Makefile.am
@@ -6,8 +6,12 @@ if USE_INCLUDED_BOOST
 BOOST = boost
 endif
 
+if USE_INCLUDED_ICONV
+ICONV = libiconv
+endif
+
 if USE_INCLUDED_ZLIB
 ZLIB = zlib
 endif
 
-SUBDIRS = $(BOOST) $(ZLIB)
+SUBDIRS = $(BOOST) $(ICONV) $(ZLIB)
diff --git a/3rdparty/libiconv/Makefile.am b/3rdparty/libiconv/Makefile.am
index d965f38..d03032d 100644
--- a/3rdparty/libiconv/Makefile.am
+++ b/3rdparty/libiconv/Makefile.am
@@ -1,10 +1,7 @@
 include $(top_srcdir)/config/common.am
 
-# This is prepared for compilation, but currently only used for packaging,
-# because configure support for compilation is still missing.
-
 # We do not build right now
-#noinst_LIBRARIES = liblyxiconv.a
+noinst_LIBRARIES = liblyxiconv.a
 
 EXTRA_DIST = \
        CMakeLists.txt \
@@ -33,11 +30,15 @@ EXTRA_DIST = \
        1.14/libcharset/lib/ref-add.sin \
        1.14/libcharset/lib/ref-del.sin
 
-# If/when we decide to build, this will do in liblyxiconv_a_SOURCES
-# But for now it confuses automake < 1.14, where we do not use subdir-objects.
-# The issue here is that there are two relocatable.c files, and they would
-# create the same .o file.
-EXTRA_DIST += \
+AM_CPPFLAGS += -I$(srcdir)/1.14/srclib -DLIBDIR=""
+
+# The two relocatable.c files confuse automake < 1.14, where we do not use
+# subdir-objects. Therefore we cannot put both in liblyxiconv_a_SOURCES
+# (they would both create the same .o file). Fortunately their contents is
+# identical, so it is enough to build only one.
+EXTRA_DIST += 1.14/libcharset/lib/relocatable.c
+
+liblyxiconv_a_SOURCES = \
        1.14/include/export.h \
        1.14/lib/aliases2.h \
        1.14/lib/aliases_aix.h \
@@ -263,7 +264,6 @@ EXTRA_DIST += \
        1.14/lib/viscii.h \
        1.14/libcharset/include/export.h \
        1.14/libcharset/lib/localcharset.c \
-       1.14/libcharset/lib/relocatable.c \
        1.14/libcharset/lib/relocatable.h \
        1.14/srclib/localcharset.h \
        1.14/srclib/unitypes.in.h \
diff --git a/config/lyxinclude.m4 b/config/lyxinclude.m4
index df17da8..84f6688 100644
--- a/config/lyxinclude.m4
+++ b/config/lyxinclude.m4
@@ -454,6 +454,70 @@ AC_DEFUN([LYX_USE_INCLUDED_BOOST],[
 ])
 
 
+dnl Usage: LYX_USE_INCLUDED_ICONV : select if the included iconv should
+dnl        be used.
+AC_DEFUN([LYX_USE_INCLUDED_ICONV],[
+  AC_MSG_CHECKING([whether to use included iconv library])
+  AC_ARG_WITH(included-iconv,
+    [AC_HELP_STRING([--without-included-iconv], [do not use the iconv lib 
supplied with LyX, try to find one in the system directories - compilation will 
abort if nothing suitable is found])],
+    [lyx_cv_with_included_iconv=$withval],
+    [lyx_cv_with_included_iconv=no])
+  AM_CONDITIONAL(USE_INCLUDED_ICONV, test x$lyx_cv_with_included_iconv = xyes)
+  AC_MSG_RESULT([$lyx_cv_with_included_iconv])
+  if test x$lyx_cv_with_included_iconv = xyes ; then
+dnl Some bits from libiconv configure.ac to avoid a nested configure call:
+    AC_EILSEQ
+    AC_TYPE_MBSTATE_T
+    AC_CHECK_FUNCS([getc_unlocked mbrtowc wcrtomb mbsinit setlocale])
+dnl Ymbstate_t is used if HAVE_WCRTOMB || HAVE_MBRTOWC, see 
3rdparty/libiconv/1.14/lib/loop_wchar.h.
+    if test $ac_cv_func_wcrtomb = yes || test $ac_cv_func_mbrtowc = yes; then
+      USE_MBSTATE_T=1
+    else
+      USE_MBSTATE_T=0
+    fi
+    AC_SUBST([USE_MBSTATE_T])
+    AC_CACHE_CHECK([whether <wchar.h> is standalone],
+      [gl_cv_header_wchar_h_standalone],
+      [AC_COMPILE_IFELSE(
+        [AC_LANG_PROGRAM(
+          [[#include <wchar.h>
+            wchar_t w;]],
+          [[]])],
+        [gl_cv_header_wchar_h_standalone=yes],
+        [gl_cv_header_wchar_h_standalone=no])])
+    if test $gl_cv_header_wchar_h_standalone = yes; then
+      BROKEN_WCHAR_H=0
+    else
+      BROKEN_WCHAR_H=1
+    fi
+    AC_SUBST([BROKEN_WCHAR_H])
+dnl we want const correctness
+    AC_DEFINE_UNQUOTED([ICONV_CONST], [const],
+      [Define as const if the declaration of iconv() needs const.])
+    ICONV_CONST=const
+    AC_SUBST([ICONV_CONST])
+dnl we build a static lib
+    DLL_VARIABLE=
+    AC_SUBST([DLL_VARIABLE])
+    ICONV_INCLUDES='-I$(top_srcdir)/3rdparty/libiconv/1.14 
-I$(top_builddir)/3rdparty/libiconv'
+    ICONV_LIBS='\$(top_builddir)/3rdparty/libiconv/liblyxiconv.a'
+    
ICONV_ICONV_H_IN=3rdparty/libiconv/iconv.h:3rdparty/libiconv/1.14/include/iconv.h.in
+  else
+    ICONV_INCLUDES=
+    AM_ICONV
+    if test "$am_cv_func_iconv" = no; then
+      AC_MSG_ERROR([cannot find required library iconv.])
+    else
+      ICONV_LIBS="$LIBICONV"
+    fi
+    ICONV_ICONV_H_IN=
+  fi
+  AC_SUBST(ICONV_INCLUDES)
+  AC_SUBST(ICONV_LIBS)
+  AC_SUBST(ICONV_ICONV_H_IN)
+])
+
+
 dnl Usage: LYX_USE_INCLUDED_ZLIB : select if the included zlib should
 dnl        be used.
 AC_DEFUN([LYX_USE_INCLUDED_ZLIB],[
diff --git a/configure.ac b/configure.ac
index 6de63c9..3b1a900 100644
--- a/configure.ac
+++ b/configure.ac
@@ -130,6 +130,19 @@ LYX_CHECK_CALLSTACK_PRINTING
 # Needed for our char_type
 AC_CHECK_SIZEOF(wchar_t)
 
+# Taken from gettext, needed for libiconv
+AC_CACHE_CHECK([for wchar_t], [gt_cv_c_wchar_t],
+   [AC_TRY_COMPILE([#include <stddef.h>
+      wchar_t foo = (wchar_t)'\0';], ,
+      [gt_cv_c_wchar_t=yes], [gt_cv_c_wchar_t=no])])
+if test $gt_cv_c_wchar_t = yes; then
+  AC_DEFINE([HAVE_WCHAR_T], [1], [Define if you have the 'wchar_t' type.])
+  HAVE_WCHAR_T=1
+else
+  HAVE_WCHAR_T=0
+fi
+AC_SUBST([HAVE_WCHAR_T])
+
 # Needed for Mingw-w64
 AC_TYPE_LONG_LONG_INT
 if test "$ac_cv_type_long_long_int" = yes; then
@@ -138,12 +151,7 @@ if test "$ac_cv_type_long_long_int" = yes; then
 fi
 
 ### We need iconv for unicode support (Qt4 frontend requires it too)
-AM_ICONV
-if test "$am_cv_func_iconv" = no; then
-  AC_MSG_ERROR([cannot find required library iconv.])
-else
-  LIBS="$LIBS $LIBICONV"
-fi
+LYX_USE_INCLUDED_ICONV
 
 ### check for compression support
 LYX_USE_INCLUDED_ZLIB
@@ -197,14 +205,6 @@ AC_TYPE_OFF_T
 AC_TYPE_PID_T
 AC_TYPE_SIZE_T
 AC_TYPE_UID_T
-# Taken from gettext
-AC_CACHE_CHECK([for wchar_t], [gt_cv_c_wchar_t],
-   [AC_TRY_COMPILE([#include <stddef.h>
-      wchar_t foo = (wchar_t)'\0';], ,
-      [gt_cv_c_wchar_t=yes], [gt_cv_c_wchar_t=no])])
-if test $gt_cv_c_wchar_t = yes; then
-  AC_DEFINE([HAVE_WCHAR_T], [1], [Define if you have the 'wchar_t' type.])
-fi
 
 LYX_CHECK_DEF(PATH_MAX, limits.h, [int n = PATH_MAX;])
 
@@ -368,6 +368,7 @@ AC_CONFIG_FILES([Makefile \
       3rdparty/boost/Makefile \
       3rdparty/hunspell/Makefile \
       3rdparty/libiconv/Makefile \
+      $ICONV_ICONV_H_IN \
       3rdparty/zlib/Makefile \
       autotests/Makefile \
       config/Makefile \
diff --git a/m4/Makefile.am b/m4/Makefile.am
index 2fd4fbb..6f02330 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -1 +1,2 @@
-EXTRA_DIST = iconv.m4 lib-ld.m4 lib-link.m4 lib-prefix.m4 nls.m4 po.m4 
progtest.m4
+EXTRA_DIST = eilseq.m4 iconv.m4 lib-ld.m4 lib-link.m4 lib-prefix.m4 nls.m4 \
+       po.m4 progtest.m4
diff --git a/m4/eilseq.m4 b/m4/eilseq.m4
new file mode 100644
index 0000000..792d514
--- /dev/null
+++ b/m4/eilseq.m4
@@ -0,0 +1,67 @@
+#serial 1
+
+AC_PREREQ(2.50)
+
+# The EILSEQ errno value ought to be defined in <errno.h>, according to
+# ISO C 99 and POSIX.  But some systems (like SunOS 4) don't define it,
+# and some systems (like BSD/OS) define it in <wchar.h> not <errno.h>.
+
+# Define EILSEQ as a C macro and as a substituted macro in such a way that
+# 1. on all systems, after inclusion of <errno.h>, EILSEQ is usable,
+# 2. on systems where EILSEQ is defined elsewhere, we use the same numeric
+#    value.
+
+AC_DEFUN([AC_EILSEQ],
+[
+  AC_REQUIRE([AC_PROG_CC])dnl
+
+  dnl Check for any extra headers that could define EILSEQ.
+  AC_CHECK_HEADERS(wchar.h)
+
+  AC_CACHE_CHECK([for EILSEQ], ac_cv_decl_EILSEQ, [
+    AC_EGREP_CPP(yes,[
+#include <errno.h>
+#ifdef EILSEQ
+yes
+#endif
+      ], have_eilseq=1)
+    if test -n "$have_eilseq"; then
+      dnl EILSEQ exists in <errno.h>. Don't need to define EILSEQ ourselves.
+      ac_cv_decl_EILSEQ=yes
+    else
+      AC_EGREP_CPP(yes,[
+#include <errno.h>
+#if HAVE_WCHAR_H
+#include <wchar.h>
+#endif
+#ifdef EILSEQ
+yes
+#endif
+        ], have_eilseq=1)
+      if test -n "$have_eilseq"; then
+        dnl EILSEQ exists in some other system header.
+        dnl Define it to the same value.
+        _AC_COMPUTE_INT([EILSEQ], ac_cv_decl_EILSEQ, [
+#include <errno.h>
+#if HAVE_WCHAR_H
+#include <wchar.h>
+#endif
+/* The following two lines are a workaround against an autoconf-2.52 bug.  */
+#include <stdio.h>
+#include <stdlib.h>
+])
+      else
+        dnl EILSEQ isn't defined by the system. Define EILSEQ ourselves, but
+        dnl don't define it as EINVAL, because iconv() callers want to
+        dnl distinguish EINVAL and EILSEQ.
+        ac_cv_decl_EILSEQ=ENOENT
+      fi
+    fi
+  ])
+  if test "$ac_cv_decl_EILSEQ" != yes; then
+    AC_DEFINE_UNQUOTED([EILSEQ], [$ac_cv_decl_EILSEQ],
+                       [Define as good substitute value for EILSEQ.])
+    EILSEQ="$ac_cv_decl_EILSEQ"
+    AC_SUBST(EILSEQ)
+  fi
+])
diff --git a/src/Makefile.am b/src/Makefile.am
index c0e4d58..8166b11 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,7 +2,8 @@ include $(top_srcdir)/config/common.am
 
 ############################### Core  ##############################
 
-AM_CPPFLAGS += -I$(top_srcdir)/src $(BOOST_INCLUDES) $(ZLIB_INCLUDES)
+AM_CPPFLAGS += -I$(top_srcdir)/src
+AM_CPPFLAGS += $(BOOST_INCLUDES) $(ICONV_INCLUDES) $(ZLIB_INCLUDES)
 AM_CPPFLAGS += $(ENCHANT_CFLAGS) $(HUNSPELL_CFLAGS)
 AM_CPPFLAGS += $(QT_CPPFLAGS) $(QT_CORE_INCLUDES)
 
@@ -20,7 +21,8 @@ EXTRA_DIST = lyx_commit_hash.h.in \
        tests/CMakeLists.txt
 
 OTHERLIBS = $(BOOST_LIBS) $(MYTHES_LIBS) $(ENCHANT_LIBS) $(HUNSPELL_LIBS) \
-            @LIBS@ $(ZLIB_LIBS) $(SOCKET_LIBS) $(LIBSHLWAPI) $(LIBPSAPI)
+            @LIBS@ $(ICONV_LIBS) $(ZLIB_LIBS) $(SOCKET_LIBS) \
+           $(LIBSHLWAPI) $(LIBPSAPI)
 
 noinst_LIBRARIES = liblyxcore.a
 bin_PROGRAMS = lyx
@@ -734,7 +736,8 @@ ADD_FRAMEWORKS = -framework QtGui -framework QtCore 
-framework AppKit -framework
 endif
 
 check_layout_CPPFLAGS = $(AM_CPPFLAGS)
-check_layout_LDADD = support/liblyxsupport.a $(LIBICONV) $(BOOST_LIBS) @LIBS@ 
$(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
+check_layout_LDADD = support/liblyxsupport.a $(LIBICONV) $(BOOST_LIBS) @LIBS@ \
+       $(ICONV_LIBS) $(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
 check_layout_LDFLAGS = $(QT_LDFLAGS) $(ADD_FRAMEWORKS)
 check_layout_SOURCES = \
        insets/InsetLayout.cpp \
@@ -754,7 +757,8 @@ check_layout_SOURCES = \
        tests/dummy_functions.cpp
 
 check_ExternalTransforms_CPPFLAGS = $(AM_CPPFLAGS)
-check_ExternalTransforms_LDADD = support/liblyxsupport.a $(LIBICONV) 
$(BOOST_LIBS) @LIBS@ $(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
+check_ExternalTransforms_LDADD = support/liblyxsupport.a $(LIBICONV) 
$(BOOST_LIBS) @LIBS@ \
+       $(ICONV_LIBS) $(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
 check_ExternalTransforms_LDFLAGS = $(QT_LDFLAGS) $(ADD_FRAMEWORKS)
 check_ExternalTransforms_SOURCES = \
        graphics/GraphicsParams.cpp \
@@ -766,7 +770,8 @@ check_ExternalTransforms_SOURCES = \
        tests/dummy_functions.cpp
 
 check_Length_CPPFLAGS = $(AM_CPPFLAGS)
-check_Length_LDADD = support/liblyxsupport.a $(LIBICONV) $(BOOST_LIBS) @LIBS@ 
$(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
+check_Length_LDADD = support/liblyxsupport.a $(LIBICONV) $(BOOST_LIBS) @LIBS@ \
+       $(ICONV_LIBS) $(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
 check_Length_LDFLAGS = $(QT_LDFLAGS) $(ADD_FRAMEWORKS)
 check_Length_SOURCES = \
        Length.cpp \
@@ -776,7 +781,8 @@ check_Length_SOURCES = \
        tests/dummy_functions.cpp
 
 check_ListingsCaption_CPPFLAGS = $(AM_CPPFLAGS)
-check_ListingsCaption_LDADD = support/liblyxsupport.a $(LIBICONV) 
$(BOOST_LIBS) @LIBS@ $(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
+check_ListingsCaption_LDADD = support/liblyxsupport.a $(LIBICONV) 
$(BOOST_LIBS) @LIBS@ \
+       $(ICONV_LIBS) $(ZLIB_LIBS) $(QT_LIB) $(LIBSHLWAPI)
 check_ListingsCaption_LDFLAGS = $(QT_LDFLAGS) $(ADD_FRAMEWORKS)
 check_ListingsCaption_SOURCES = \
        tests/check_ListingsCaption.cpp \
diff --git a/src/client/Makefile.am b/src/client/Makefile.am
index 131c56a..3874376 100644
--- a/src/client/Makefile.am
+++ b/src/client/Makefile.am
@@ -8,11 +8,12 @@ bin_PROGRAMS = lyxclient
 
 EXTRA_DIST = lyxclient.1in CMakeLists.txt
 
-AM_CPPFLAGS += -I$(srcdir)/.. $(BOOST_INCLUDES) $(ZLIB_INCLUDES)
+AM_CPPFLAGS += -I$(srcdir)/.. \
+       $(BOOST_INCLUDES) $(ICONV_INCLUDES) $(ZLIB_INCLUDES)
 
 lyxclient_LDADD = \
        $(top_builddir)/src/support/liblyxsupport.a \
-       $(BOOST_LIBS) @LIBS@ $(ZLIB_LIBS) $(SOCKET_LIBS) \
+       $(BOOST_LIBS) @LIBS@ $(ICONV_LIBS) $(ZLIB_LIBS) $(SOCKET_LIBS) \
        $(QT_LIB) $(QT_LDFLAGS) $(LIBSHLWAPI) $(LIBPSAPI)
 
 if INSTALL_MACOSX
diff --git a/src/frontends/Makefile.am b/src/frontends/Makefile.am
index 0a615e1..862613a 100644
--- a/src/frontends/Makefile.am
+++ b/src/frontends/Makefile.am
@@ -6,7 +6,8 @@ DIST_SUBDIRS = qt4 .
 
 noinst_LIBRARIES = liblyxfrontends.a
 
-AM_CPPFLAGS += -I$(srcdir)/..  $(BOOST_INCLUDES) $(ZLIB_INCLUDES)
+AM_CPPFLAGS += -I$(srcdir)/.. \
+       $(BOOST_INCLUDES) $(ICONV_INCLUDES) $(ZLIB_INCLUDES)
 
 liblyxfrontends_a_SOURCES = \
        alert.h \
@@ -39,7 +40,7 @@ TESTS = \
 check_PROGRAMS = \
        biblio
 
-biblio_LDADD = $(BOOST_LIBS) $(ZLIB_LIBS)
+biblio_LDADD = $(BOOST_LIBS) $(ICONV_LIBS) $(ZLIB_LIBS)
 biblio_SOURCES = \
        tests/biblio.cpp \
        tests/boost.cpp
diff --git a/src/frontends/qt4/Makefile.am b/src/frontends/qt4/Makefile.am
index 6b1d690..e715fef 100644
--- a/src/frontends/qt4/Makefile.am
+++ b/src/frontends/qt4/Makefile.am
@@ -47,7 +47,8 @@ AM_CPPFLAGS += \
        -I$(top_srcdir)/src \
        -I$(top_srcdir)/src/frontends \
        -I$(top_srcdir)/images \
-       $(QT_INCLUDES) $(BOOST_INCLUDES) $(ZLIB_INCLUDES)
+       $(QT_INCLUDES) \
+       $(BOOST_INCLUDES) $(ICONV_INCLUDES) $(ZLIB_INCLUDES)
 
 SOURCEFILES = \
        ButtonPolicy.cpp \
diff --git a/src/support/Makefile.am b/src/support/Makefile.am
index d113729..29f003b 100644
--- a/src/support/Makefile.am
+++ b/src/support/Makefile.am
@@ -26,7 +26,8 @@ liblyxsupport_a_DEPENDENCIES = $(MOCEDFILES)
 #
 ##################################################################
 
-AM_CPPFLAGS += -I$(srcdir)/.. $(BOOST_INCLUDES) $(ZLIB_INCLUDES) \
+AM_CPPFLAGS += -I$(srcdir)/.. \
+       $(BOOST_INCLUDES) $(ICONV_INCLUDES) $(ZLIB_INCLUDES) \
        $(QT_CPPFLAGS) $(QT_INCLUDES)
 
 liblyxsupport_a_SOURCES = \
diff --git a/src/tex2lyx/Makefile.am b/src/tex2lyx/Makefile.am
index e293567..bf2d66d 100644
--- a/src/tex2lyx/Makefile.am
+++ b/src/tex2lyx/Makefile.am
@@ -19,7 +19,7 @@ DEFAULT_INCLUDES =
 
 AM_CPPFLAGS += -I$(top_srcdir)/src/tex2lyx \
        -I$(top_srcdir)/src -I$(top_builddir) -I$(top_builddir)/src \
-       $(BOOST_INCLUDES) $(ZLIB_INCLUDES)
+       $(BOOST_INCLUDES) $(ICONV_INCLUDES) $(ZLIB_INCLUDES)
 
 TEST_FILES = \
        test/runtests.cmake \
@@ -125,7 +125,7 @@ tex2lyx_LDADD = \
        $(top_builddir)/src/support/liblyxsupport.a \
        $(LIBICONV) $(BOOST_LIBS) \
        $(QT_LIB) $(QT_LDFLAGS) \
-       @LIBS@ $(ZLIB_LIBS) $(LIBSHLWAPI) $(LIBPSAPI)
+       @LIBS@ $(ICONV_LIBS) $(ZLIB_LIBS) $(LIBSHLWAPI) $(LIBPSAPI)
 
 if INSTALL_MACOSX
 tex2lyx_LDFLAGS = -framework AppKit \

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