mingw: check for system iconv dll

libxslt in Fedora mingw packages depends on it.

config_host.mk.in

@@ -292,6 +292,7 @@ export MINGW_GRAPHITE2_DLL=@MINGW_GRAPHITE2_DLL@
 export MINGW_GXXDLL=@MINGW_GXXDLL@
 export MINGW_HUNSPELL_DLL=@MINGW_HUNSPELL_DLL@
 export MINGW_HYPHEN_DLL=@MINGW_HYPHEN_DLL@
+export MINGW_ICONV_DLL=@MINGW_ICONV_DLL@
 export MINGW_ICUDATA_DLL=@MINGW_ICUDATA_DLL@
 export MINGW_ICUI18N_DLL=@MINGW_ICUI18N_DLL@
 export MINGW_ICUUC_DLL=@MINGW_ICUUC_DLL@

configure.in

@@ -6034,6 +6034,7 @@ if test "$with_system_libxml" = "yes"; then
     fi
 
     libo_MINGW_CHECK_DLL([LIBXSLT], [libxslt])
+    libo_MINGW_TRY_DLL([ICONV], [iconv])
 else
     AC_MSG_RESULT([internal])
     SYSTEM_LIBXSLT=NO
@@ -6056,6 +6057,7 @@ AC_SUBST(LIBXSLT_CFLAGS)
 AC_SUBST(LIBXSLT_LIBS)
 AC_SUBST(XSLTPROC)
 AC_SUBST([MINGW_LIBXSLT_DLL])
+AC_SUBST([MINGW_ICONV_DLL])
 
 # ===================================================================
 # Check for system libxml

external/mingw-dlls/makefile.mk

@@ -55,6 +55,7 @@ MINGW_DLLS:= \
     $(MINGW_GRAPHITE2_DLL) \
     $(MINGW_HUNSPELL_DLL) \
     $(MINGW_HYPHEN_DLL) \
+    $(MINGW_ICONV_DLL) \
     $(MINGW_ICUDATA_DLL) \
     $(MINGW_ICUI18N_DLL) \
     $(MINGW_ICUUC_DLL) \

scp2/source/ooo/makefile.mk

@@ -309,6 +309,10 @@ SCPDEFS += -DNEEDS_MINGW_HUNSPELL_DLL -DMINGW_HUNSPELL_DLL=\""$(MINGW_HUNSPELL_D
 SCPDEFS += -DNEEDS_MINGW_HYPHEN_DLL -DMINGW_HYPHEN_DLL=\""$(MINGW_HYPHEN_DLL)"\"
 .ENDIF
 
+.IF "$(MINGW_ICONV_DLL)" != ""
+SCPDEFS += -DNEEDS_MINGW_ICONV_DLL -DMINGW_ICONV_DLL=\""$(MINGW_ICONV_DLL)"\"
+.ENDIF
+
 .IF "$(MINGW_ICUDATA_DLL)" != ""
 SCPDEFS += -DNEEDS_MINGW_ICUDATA_DLL -DMINGW_ICUDATA_DLL=\""$(MINGW_ICUDATA_DLL)"\"
 .ENDIF

scp2/source/ooo/mingw_dlls.scp

@@ -50,6 +50,9 @@ MINGW_DLL( gid_Brand_File_Lib_Mingw_Libexpat, MINGW_EXPAT_DLL )
 #ifdef NEEDS_MINGW_LIBXSLT_DLL
 MINGW_DLL( gid_Brand_File_Lib_Mingw_Libxslt, MINGW_LIBXSLT_DLL )
 #endif
+#ifdef NEEDS_MINGW_ICONV_DLL
+MINGW_DLL( gid_Brand_File_Lib_Mingw_Libxslt, MINGW_ICONV_DLL )
+#endif
 #endif
 
 #ifdef SYSTEM_LIBXML