On 7/18/05, Janusz Piwowarski <jpiw@go2.pl> wrote:
Vladimir Prus wrote:
Two questions: 1. What does the flag do? 2. Somebody else reported successfull built with mingw. Do you know if this problem is specific to some version of mingw?
I cannot find any documentation on the flag; the page where I found this fix is here: http://www.ogre3d.org/phpBB2/viewtopic.php?p=62249& There were several more references to this flag at: http://sourceforge.net/mailarchive/forum.php?thread_id=7643187&forum_id=5121 http://permalink.gmane.org/gmane.os.cygwin.patches/441 (cygwin-related) This issue seems to be specific to mingw 3.4+ versions - just few days ago there was an older mingw in the regression-test tables, and that one reported working fine (A 3.3-based version IIRC, but I can't be sure). A look into few days old regression-test tables could provide the exact mingw version which still worked. Here's a test / proof with mingw 3.4.2, boost CVS (few days old), on Win 2003 SP1: C:\boostcvs-src\libs\program_options\test>g++ -I c:\boostcvs\include\boost-1_33 -L c:\boostcvs\lib variable_map_test.cpp c:\boostcvs\lib\libboost_test_exec_monitor-mgw.lib -lboost_program_options-mgw-d -o test Info: resolving vtable for boost::program_options::variables_mapby linking to __imp___ZTVN5boost15program_options13variables_mapE (auto-import) Info: resolving vtable for boost::program_options::untyped_valueby linking to __imp___ZTVN5boost15program_options13untyped_valueE (auto-import) Info: resolving vtable for boost::program_options::value_semantic_codecvt_helper<char>by linking to __imp___ZTVN5boost15program_options29value_semantic_codecvt_helperIcEE (auto-import) Info: resolving boost::program_options::arg by linking to __imp___ZN5boost15program_options3argE (auto-import) Info: resolving vtable for boost::program_options::validation_errorby linking to __imp___ZTVN5boost15program_options16validation_errorE (auto-import) C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options13variables_mapD1Ev[boost::program_options::variables_map::~variables_map()]+0x3a):variable_map_test.cpp: variable 'vtable for boost::program_options::variables_map' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details. C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options13untyped_valueC1Eb[boost::program_options::untyped_value::untyped_value(bool)]+0x1c):variable_map_test.cpp: variable 'vtable for boost::program_options::untyped_value' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details. C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options29value_semantic_codecvt_helperIcEC2Ev[boost::program_options::value_semantic_codecvt_helper<char>::value_semantic_codecvt_helper()]+0x16):variable_map_test.cpp: variable 'vtable for boost::program_options::value_semantic_codecvt_helper<char>' can't be auto-imported. Please read the documentation forld's --enable-auto-import for details. C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options29value_semantic_codecvt_helperIcED2Ev[boost::program_options::value_semantic_codecvt_helper<char>::~value_semantic_codecvt_helper()]+0xb):variable_map_test.cpp: variable 'vtable for boost::program_options::value_semantic_codecvt_helper<char>' can't be auto-imported. Please read the documentation forld's --enable-auto-import for details. C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options16validation_errorD2Ev[boost::program_options::validation_error::~validation_error()]+0x3a):variable_map_test.cpp: variable 'vtable for boost::program_options::validation_error' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details. C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options16validation_errorC2ERKS1_[boost::program_options::validation_error::validation_error(boost::program_options::validation_error const&)]+0x53):variable_map_test.cpp: variable 'vtable for boost::program_options::validation_error' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details. C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options16validation_errorD1Ev[boost::program_options::validation_error::~validation_error()]+0x3a):variable_map_test.cpp: variable 'vtable for boost::program_options::validation_error' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details. C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp/ccYncaaa.o(.text$_ZN5boost15program_options16validation_errorC1ERKSs[boost::program_options::validation_error::validation_error(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)]+0x53):variable_map_test.cpp: variable 'vtable for boost::program_options::validation_error' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details. collect2: ld returned 1 exit status C:\boostcvs-src\libs\program_options\test>g++ -I c:\boostcvs\include\boost-1_33 -L c:\boostcvs\lib variable_map_test.cpp c:\boostcvs\lib\libboost_test_exec_monitor-mgw.lib -lboost_program_options-mgw-d -o test -Wl,--enable-runtime-pseudo-reloc Info: resolving vtable for boost::program_options::variables_mapby linking to __imp___ZTVN5boost15program_options13variables_mapE (auto-import) Info: resolving vtable for boost::program_options::untyped_valueby linking to __imp___ZTVN5boost15program_options13untyped_valueE (auto-import) Info: resolving vtable for boost::program_options::value_semantic_codecvt_helper<char>by linking to __imp___ZTVN5boost15program_options29value_semantic_codecvt_helperIcEE (auto-import) Info: resolving boost::program_options::arg by linking to __imp___ZN5boost15program_options3argE (auto-import) Info: resolving vtable for boost::program_options::validation_errorby linking to __imp___ZTVN5boost15program_options16validation_errorE (auto-import) C:\boostcvs-src\libs\program_options\test>test Running 1 test case... *** No errors detected C:\boostcvs-src\libs\program_options\test>g++ -v Reading specs from c:/mingw/bin/../lib/gcc/mingw32/3.4.2/specs Configured with: ../gcc/configure --with-gcc --with-gnu-ld --with-gnu-as --host=mingw32 --target=mingw32 --prefix=/mingw --enable-threads --disable-nls --enable-languages=c,c++,f77,ada,objc,java --disable-win32-registry --disable-shared --enable-sjlj-exceptions --enable-libgcj --disable-java-awt --without-x --enable-java-gc=boehm --disable-libgcj-debug --enable-interpreter --enable-hash-synchronization --enable-libstdcxx-debug Thread model: win32 gcc version 3.4.2 (mingw-special) Hope this helps, Alo