UPD: libmime 64-bit.

libraries/src/libmime/Makefile

@@ -2,13 +2,28 @@
 
 CPPFLAGS = -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include # -g3
 
-all: libmime
+ifndef CPU_TARGET
+CPU_TARGET=i386
+endif
+
+ifeq ($(CPU_TARGET),x86_64)
+CPPFLAGS += -m64
+else
+ifeq ($(CPU_TARGET),i386)
+CPPFLAGS += -m32
+else
+$(error Invalid target CPU)
+endif
+endif
+
+all: clean libmime
 
 clean:
 	rm -f *.o *.a *.so.*
 
 libmime: mime-action.o mime-cache.o mime-type.o mime-util.o
 	$(AR) rc libmime.a *.o
+	cp libmime.a ../../$(CPU_TARGET)
 # shared library:
 #	$(CC) -shared -Wl,-soname,libmime.so.1 -o libmime.so.1.0.1 libmime.a
 #	ln -s libmime.so.1 libmime.so

src/doublecmd-fpc.cfg

@@ -0,0 +1,6 @@
+#IFDEF CPU64
+-Fl../libraries/x86_64
+#ELSE
+-Fl../libraries/i386
+#ENDIF
+

src/doublecmd.lpi

@@ -579,7 +579,6 @@
     </Target>
     <SearchPaths>
       <IncludeFiles Value="$(LazarusDir)\ide\;$(ProjOutDir)\"/>
-      <Libraries Value="$(ProjPath)\..\libraries\"/>
       <OtherUnitFiles Value="$(ProjPath)\platform\;$(ProjPath)\platform\$(SrcOS)\;..\sdk\;$(ProjPath)\newdesign\;$(ProjPath)\newdesign\fileproperties\;newdesign\columnsview\"/>
       <UnitOutputDirectory Value="..\units\$(TargetCPU)-$(TargetOS)-$(LCLWidgetType)"/>
       <SrcPath Value="$(LazarusDir)\lcl\;$(LazarusDir)\lcl\interfaces\$(LCLWidgetType)\;$(fpcsrcdir)\packages\fcl-base\src\"/>
@@ -608,6 +607,10 @@
       </Debugging>
     </Linking>
     <Other>
+      <ConfigFile>
+        <CustomConfigFile Value="True"/>
+        <ConfigFilePath Value="doublecmd-fpc.cfg"/>
+      </ConfigFile>
       <CompilerPath Value="$(CompPath)"/>
       <ExecuteBefore>
         <Command Value="_getsvnrev.cmd $(LazarusDir)"/>

src/umimeactions.pas

@@ -6,9 +6,7 @@ interface
 
 uses
   Classes,
-  glib2, libc;
-
-{$linklib libmime.a}
+  glib2;
 
 type
   PDesktopFileEntry = ^TDesktopFileEntry;
@@ -43,13 +41,16 @@ type
     Hidden: gboolean;
   end;
 
-procedure mime_type_init; cdecl; external 'libmime';
-procedure mime_type_finalize; cdecl; external 'libmime';
-function mime_type_get_by_filename(filename: PChar; stat: Pointer) : PChar; cdecl; external 'libmime';
-function mime_type_get_actions(mimeType: PChar): PPChar; cdecl; external 'libmime';
-function mime_type_locate_desktop_file(DirectoryToCheck: PChar; DesktopFileId: PChar): PChar; cdecl; external 'libmime';
-function mime_get_desktop_entry(DesktopFileName: PChar): TCDesktopFileEntry; cdecl; external 'libmime';
-function translate_app_exec_to_command_line(const app: PCDesktopFileEntry; file_list: PGList): PChar; cdecl; external 'libmime';
+const  
+  libmime = 'libmime';
+
+procedure mime_type_init; cdecl; external libmime;
+procedure mime_type_finalize; cdecl; external libmime;
+function mime_type_get_by_filename(filename: PChar; stat: Pointer) : PChar; cdecl; external libmime;
+function mime_type_get_actions(mimeType: PChar): PPChar; cdecl; external libmime;
+function mime_type_locate_desktop_file(DirectoryToCheck: PChar; DesktopFileId: PChar): PChar; cdecl; external libmime;
+function mime_get_desktop_entry(DesktopFileName: PChar): TCDesktopFileEntry; cdecl; external libmime;
+function translate_app_exec_to_command_line(const app: PCDesktopFileEntry; file_list: PGList): PChar; cdecl; external libmime;
 
 function GetDesktopEntries(FileNames: TStringList): TList;
 var