Fehler Gebäude WxWidgets DLLs mit GCC Link-Time Optimization unter Windows

Question

Beim Versuch, die wxWidgets 3.1.0 Bibliothek mit der folgenden Befehlszeile zu erstellen:

mingw32-make -f makefile.gcc BUILD = Release GEMEINSAM = 1 CFLAGS = "- O2 -flto" CXXFLAGS = "- O2 -flto" LDFLAGS = "- O2 -flto"

ich erhalte diese Warnung (31 Fälle)

lto1.exe: warning: -fPIC ignored for target (all code is position independent) 

Gefolgt von:

C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x13c4): undefined reference to `wx_regfree' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x1418): undefined reference to `wx_regfree' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x3792): undefined reference to `wx_regerror' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x37c1): undefined reference to `wx_regerror' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x3a7d): undefined reference to `wx_re_exec' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x47de): undefined reference to `wx_re_comp' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x4cf4): undefined reference to `wx_regfree' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans6.ltrans.o:<artificial>:(.text+0x4f94): undefined reference to `wx_regfree' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans12.ltrans.o:<artificial>:(.text+0x57c): undefined reference to `deflateEnd' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans12.ltrans.o:<artificial>:(.text+0x88d): undefined reference to `deflateSetDictionary' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans12.ltrans.o:<artificial>:(.text+0x8ba): undefined reference to `deflateSetDictionary' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans12.ltrans.o:<artificial>:(.text+0x947): undefined reference to `deflate' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans12.ltrans.o:<artificial>:(.text+0x4830): undefined reference to `deflate' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans12.ltrans.o:<artificial>:(.text+0x59f4): undefined reference to `deflateInit2_' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans14.ltrans.o:<artificial>:(.text+0x3354): undefined reference to `deflateReset' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans14.ltrans.o:<artificial>:(.text+0x38db): undefined reference to `inflateReset' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x21d): undefined reference to `inflateSetDictionary' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x24a): undefined reference to `inflateSetDictionary' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x266): undefined reference to `zlibVersion' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x27d): undefined reference to `zlibVersion' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x2d0): undefined reference to `zlibVersion' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x121c): undefined reference to `inflate' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x1924): undefined reference to `inflateEnd' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x20b7): undefined reference to `inflateInit2_' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x3694): undefined reference to `crc32' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x5534): undefined reference to `crc32' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x5813): undefined reference to `crc32' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x773e): undefined reference to `crc32' 
C:\Users\Marc\AppData\Local\Temp\ccEDEhIg.ltrans16.ltrans.o:<artificial>:(.text+0x7c5b): undefined reference to `crc32' 
collect2.exe: error: ld returned 1 exit status 
makefile.gcc:5299: recipe for target '..\..\lib\gcc_dll\wxbase310u_gcc_custom.dll' failed 
mingw32-make: *** [..\..\lib\gcc_dll\wxbase310u_gcc_custom.dll] Error 1 

letzten Zeilen durch den Compiler und Linker ausgestrahlte, die in all diesen Fehlern führt, sind wie folgt:

g++ -c -o gcc_mswudll\basedll_main.o -O2 -mthreads -DHAVE_W32API_H -D__WXMSW__ -DNDEBUG -D_UNICODE -I..\..\lib\gcc_dll\mswu -I..\..\include -W -Wall -DWXBUILDING -I..\..\src\tiff\libtiff -I..\..\src\jpeg -I..\..\src\png -I..\..\src\zlib -I..\..\src\regex -I..\..\src\expat\lib -DwxUSE_GUI=0 -DWXMAKINGDLL_BASE -DwxUSE_BASE=1 -Wno-ctor-dtor-privacy -O2 -flto -MTgcc_mswudll\basedll_main.o -MFgcc_mswudll\basedll_main.o.d -MD -MP ../../src/msw/main.cpp 
g++ -c -o gcc_mswudll\basedll_volume.o -O2 -mthreads -DHAVE_W32API_H -D__WXMSW__ -DNDEBUG -D_UNICODE -I..\..\lib\gcc_dll\mswu -I..\..\include -W -Wall -DWXBUILDING -I..\..\src\tiff\libtiff -I..\..\src\jpeg -I..\..\src\png -I..\..\src\zlib -I..\..\src\regex -I..\..\src\expat\lib -DwxUSE_GUI=0 -DWXMAKINGDLL_BASE -DwxUSE_BASE=1 -Wno-ctor-dtor-privacy -O2 -flto -MTgcc_mswudll\basedll_volume.o -MFgcc_mswudll\basedll_volume.o.d -MD -MP ../../src/msw/volume.cpp 
g++ -shared -fPIC -o ..\..\lib\gcc_dll\wxbase310u_gcc_custom.dll gcc_mswudll\basedll_dummy.o gcc_mswudll\basedll_version_rc.o gcc_mswudll\basedll_any.o gcc_mswudll\basedll_appbase.o gcc_mswudll\basedll_arcall.o gcc_mswudll\basedll_arcfind.o gcc_mswudll\basedll_archive.o gcc_mswudll\basedll_arrstr.o gcc_mswudll\basedll_base64.o gcc_mswudll\basedll_clntdata.o gcc_mswudll\basedll_cmdline.o gcc_mswudll\basedll_config.o gcc_mswudll\basedll_convauto.o gcc_mswudll\basedll_datetime.o gcc_mswudll\basedll_datetimefmt.o gcc_mswudll\basedll_datstrm.o gcc_mswudll\basedll_dircmn.o gcc_mswudll\basedll_dynarray.o gcc_mswudll\basedll_dynlib.o gcc_mswudll\basedll_dynload.o gcc_mswudll\basedll_encconv.o gcc_mswudll\basedll_evtloopcmn.o gcc_mswudll\basedll_extended.o gcc_mswudll\basedll_ffile.o gcc_mswudll\basedll_file.o gcc_mswudll\basedll_fileback.o gcc_mswudll\basedll_fileconf.o gcc_mswudll\basedll_filefn.o gcc_mswudll\basedll_filename.o gcc_mswudll\basedll_filesys.o gcc_mswudll\basedll_filtall.o gcc_mswudll\basedll_filtfind.o gcc_mswudll\basedll_fmapbase.o gcc_mswudll\basedll_fs_arc.o gcc_mswudll\basedll_fs_filter.o gcc_mswudll\basedll_hash.o gcc_mswudll\basedll_hashmap.o gcc_mswudll\basedll_init.o gcc_mswudll\basedll_intl.o gcc_mswudll\basedll_ipcbase.o gcc_mswudll\basedll_languageinfo.o gcc_mswudll\basedll_list.o gcc_mswudll\basedll_log.o gcc_mswudll\basedll_longlong.o gcc_mswudll\basedll_memory.o gcc_mswudll\basedll_mimecmn.o gcc_mswudll\basedll_module.o gcc_mswudll\basedll_mstream.o gcc_mswudll\basedll_numformatter.o gcc_mswudll\basedll_object.o gcc_mswudll\basedll_platinfo.o gcc_mswudll\basedll_powercmn.o gcc_mswudll\basedll_process.o gcc_mswudll\basedll_regex.o gcc_mswudll\basedll_stdpbase.o gcc_mswudll\basedll_sstream.o gcc_mswudll\basedll_stdstream.o gcc_mswudll\basedll_stopwatch.o gcc_mswudll\basedll_strconv.o gcc_mswudll\basedll_stream.o gcc_mswudll\basedll_string.o gcc_mswudll\basedll_stringimpl.o gcc_mswudll\basedll_stringops.o gcc_mswudll\basedll_strvararg.o gcc_mswudll\basedll_sysopt.o gcc_mswudll\basedll_tarstrm.o gcc_mswudll\basedll_textbuf.o gcc_mswudll\basedll_textfile.o gcc_mswudll\basedll_threadinfo.o gcc_mswudll\basedll_time.o gcc_mswudll\basedll_timercmn.o gcc_mswudll\basedll_timerimpl.o gcc_mswudll\basedll_tokenzr.o gcc_mswudll\basedll_translation.o gcc_mswudll\basedll_txtstrm.o gcc_mswudll\basedll_unichar.o gcc_mswudll\basedll_uri.o gcc_mswudll\basedll_ustring.o gcc_mswudll\basedll_variant.o gcc_mswudll\basedll_wfstream.o gcc_mswudll\basedll_wxcrt.o gcc_mswudll\basedll_wxprintf.o gcc_mswudll\basedll_xlocale.o gcc_mswudll\basedll_xti.o gcc_mswudll\basedll_xtistrm.o gcc_mswudll\basedll_zipstrm.o gcc_mswudll\basedll_zstream.o gcc_mswudll\basedll_fswatchercmn.o gcc_mswudll\basedll_fswatcherg.o gcc_mswudll\basedll_basemsw.o gcc_mswudll\basedll_crashrpt.o gcc_mswudll\basedll_debughlp.o gcc_mswudll\basedll_dde.o gcc_mswudll\basedll_dir.o gcc_mswudll\basedll_dlmsw.o gcc_mswudll\basedll_evtloopconsole.o gcc_mswudll\basedll_mimetype.o gcc_mswudll\basedll_power.o gcc_mswudll\basedll_regconf.o gcc_mswudll\basedll_registry.o gcc_mswudll\basedll_snglinst.o gcc_mswudll\basedll_stackwalk.o gcc_mswudll\basedll_stdpaths.o gcc_mswudll\basedll_thread.o gcc_mswudll\basedll_timer.o gcc_mswudll\basedll_utils.o gcc_mswudll\basedll_utilsexc.o gcc_mswudll\basedll_fswatcher.o gcc_mswudll\basedll_event.o gcc_mswudll\basedll_fs_mem.o gcc_mswudll\basedll_msgout.o gcc_mswudll\basedll_utilscmn.o gcc_mswudll\basedll_main.o gcc_mswudll\basedll_volume.o -mthreads -L..\..\lib\gcc_dll -Wl,--out-implib=..\..\lib\gcc_dll\libwxbase31u.a -O2 -flto -lwxzlib -lwxregexu -lwxexpat -lkernel32 -luser32 -lgdi32 -lcomdlg32 -lwinspool -lwinmm -lshell32 -lshlwapi -lcomctl32 -lole32 -loleaut32 -luuid -lrpcrt4 -ladvapi32 -lversion -lwsock32 -lwininet 

Was ich habe versucht, so weit:

• Hinzugefügt -fPIC zu CFLAGS und CXXFLAGS, vergeblich.

• Verwenden -fwhopr statt -flto, wie sie in der MinGW-w64 Wiki vorgeschlagen, aber es wird nicht von beiden gcc.exe erkannt und g ++. Exe. Nach dem Lesen dieses Artikels: Linktime optimization in GCC, part 1 - brief history, nehme ich an, die -fwhopr Option existiert nicht mehr und ist jetzt der Standardmodus für den -flto Schalter.

• Erstellen Sie die statische Konfiguration (SHARED=0). Es baut erfolgreich auf, ist aber unbrauchbar. Siehe Referenz # 1.

• -flto aus LDFLAGS auslassen - d. H. -flto nur in CFLAGS und CXXFLAGS verwenden. Auch ohne Erfolg.

Wie Vergangenheit diese Fehler zu bekommen, und wxWidgets mit GCC Link-Time Optimization bauen?
Ich baue mit MinGW-w64; Gewindemodell Win32; Ausnahmebehandlung DWARF; GCC-Version 5.3.0.

---

Referenz # 1: Ergebnis aus dem "Minimal Sample" Befehlszeile

H:\temp\wxwidgets-3.1.0\samples\minimal>mingw32-make -f makefile.gcc BUILD=release SHARED=0 CFLAGS="-O2 -flto" CXXFLAGS="-O2 -flto" LDFLAGS="-O2 -flto" 
windres --use-temp-file -i../../samples/sample.rc -ogcc_mswu\minimal_sample_rc.o --define __WXMSW__ --define NDEBUG --define _UNICODE --include-dir .\..\..\lib\gcc_lib\mswu --include-dir ./../../include --include-dir . --include-dir ./../../samples --define NOPCH 
g++ -c -o gcc_mswu\minimal_minimal.o -O2 -mthreads -DHAVE_W32API_H -D__WXMSW__ -DNDEBUG -D_UNICODE -I.\..\..\lib\gcc_lib\mswu -I.\..\..\include -W -Wall -I. -I.\..\..\samples -DNOPCH -Wno-ctor-dtor-privacy -O2 -flto -MTgcc_mswu\minimal_minimal.o -MFgcc_mswu\minimal_minimal.o.d -MD -MP minimal.cpp 
g++ -o gcc_mswu\minimal.exe gcc_mswu\minimal_sample_rc.o gcc_mswu\minimal_minimal.o -mthreads -L.\..\..\lib\gcc_lib -Wl,--subsystem,windows -mwindows -O2 -flto -lwxmsw31u_core -lwxbase31u -lwxtiff -lwxjpeg -lwxpng -lwxzlib -lwxregexu -lwxexpat -lkernel32 -luser32 -lgdi32 -lcomdlg32 -lwinspool -lwinmm -lshell32 -lshlwapi -lcomctl32 -lole32 -loleaut32 -luuid -lrpcrt4 -ladvapi32 -lversion -lwsock32 -lwininet 
C:\Users\Marc\AppData\Local\Temp\ccY1ZbWs.ltrans0.ltrans.o:<artificial>:(.text+0x191): undefined reference to `wxDefaultPosition' 
C:\Users\Marc\AppData\Local\Temp\ccY1ZbWs.ltrans0.ltrans.o:<artificial>:(.text+0x197): undefined reference to `wxDefaultPosition' 
C:\Users\Marc\AppData\Local\Temp\ccY1ZbWs.ltrans0.ltrans.o:<artificial>:(.text+0x1a8): undefined reference to `wxDefaultSize' 

(Many, many other "undefined reference" errors - probably one for every function the code ever depends on) and then... 

collect2.exe: error: ld returned 1 exit status 
makefile.gcc:221: recipe for target 'gcc_mswu\minimal.exe' failed 
mingw32-make: *** [gcc_mswu\minimal.exe] Error 1 

Answer 1

Ich habe bauen versucht nie zuvor mit DLLs LTO verwenden, aber es gibt offenbar Fehler bei der Durchführung, siehe z this one. Nicht sicher, ob die dort vorgeschlagene Problemumgehung in Ihrem Fall helfen kann.

Was ich denke, sollte auf jeden Fall Arbeit würde Ihre Anwendung Quellen und wxWidgets zusammen auf einmal kompiliert, wäre dies ähnlich sein, eine statische Bibliothek zu bauen, soll aber nicht optimiert weg Dinge ungenutzt in der Bibliothek - aber in dem verwendeten Anwendungscode.

Schließlich bin ich mir wirklich nicht sicher, ob Sie im WxWidgets-Fall viel mit LTO erreichen werden. Es gibt nicht so viel "langsamen" Code in der Bibliothek zu optimieren ...