Re: [Mingw-users] Linking with version.dll (libversion.a) fails

[Jose F. <j_r...@ya...>]

Hi,

The order of the libraries is important. Since the gnu ld generaly onle
makes one pass it must know in advance which symbols are needed from
each library. That means that all libraries must come after the objects
files. This is also why is very common on Makefile to put the libraries
in a separate variable and not on LDFLAGS, e.g.:

LD=$(CXX) $(CXXFLAGS)
LDFLAGS=-mwindows -mno-cygwin -Wl,--verbose
LIBS=-lversion

target:
	$(LD) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)


Regards,
Jose Fonseca

On Thu, 2001-11-29 at 17:11, Polley Christopher W wrote:
> Hi, all:
> 
> I'm having a curious problem linking with version.dll:
> 
> linking (LDFLAGS=-Wall -mwindows -lversion -mno-cygwin -Wl,--verbose) fails
> with:
> >winmain.o(.text+0xd0):winmain.c: undefined reference to
> `GetFileVersionInfoSizeA@8'
> >winmain.o(.text+0x11b):winmain.c: undefined reference to
> `GetFileVersionInfoA@16'
> >winmain.o(.text+0x16f):winmain.c: undefined reference to
> `VerQueryValueA@16'
> >winmain.o(.text+0x226):winmain.c: undefined reference to
> `VerQueryValueA@16'
> >winmain.o(.text+0x278):winmain.c: undefined reference to
> `VerQueryValueA@16'
> >winmain.o(.text+0x2d6):winmain.c: undefined reference to
> `VerQueryValueA@16'
> >winmain.o(.text+0xf8b):winmain.c: undefined reference to
> `GetFileVersionInfoSizeA@8'
> >winmain.o(.text+0xfe2):winmain.c: undefined reference to
> `GetFileVersionInfoA@16'
> >winmain.o(.text+0x1040):winmain.c: undefined reference to
> `VerQueryValueA@16'
> >winmain.o(.text+0x10d5):winmain.c: undefined reference to
> `VerQueryValueA@16'
> 
> but win32api/libversion.a is found
> >attempt to open /usr/lib/w32api/libversion.a succeeded
> 
> and contains the symbols in question:
> (trimmed output of nm -g /usr/lib/w32api/libversion.a)
> >ds00010.o:
> >00000000 T _VerQueryValueA@16
> >ds00001.o:
> >00000000 T _GetFileVersionInfoSizeA@8
> >ds00000.o:
> >00000000 T _GetFileVersionInfoA@16
> 
> (trimmed output of nm -u winmain.o)
> >_GetFileVersionInfoA@16
> >_GetFileVersionInfoSizeA@8
> >_VerQueryValueA@16
> 
> I'm using a very recent install of cygwin, with the exception that I'm using
> cygwin-1.3.2-1 and bash-2.05-8 (due to the null handle dup problem mentioned
> in my posts to the cygwin ml last week)
> 
> If I remove the sections of code in winmain.c that refer to these functions,
> the code compiles and runs (but doesn't pull the version info out of the
> resources, of course)
> 
> Any ideas why this won't link?
> 
> Warm Regards,
> Chris
> 
> 
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