Re: Xpdf and linking problems

[Sebastian Reitenbach]

On Saturday, June 2, 2012 00:13 CEST, Riccardo Mottola 
<riccardo.mottola@libero.it> wrote: 
 
> Hi,
> 
> I fixed several details in the PDFKit/xpdf build system (currently 
> available in GAP and used for example by GWorkspace by its inspector).
> 
> It contained several hacks which made it compile on linux+gcc, but not 
> well on other systems or compilers.
> I fixed some places which forced the "C" compiler to be g++ (I suppose 
> for linking purposes) which prevented building with clang and cleaned up 
> some of the cflags and ldflags.
> 
> I still can build fine and use it on linux/x86 and on freebsd8/gcc. With 
> freeBSD9 it builds (but displays white pages). On NetBSD and OpenBSD 
> however it builds, but it fails to be used by the gworkspace configure 
> script. I think that either some option is not working or that 
> gnustep-make has problems when linking objective-c and C++ file?
> I suppose that when OBJC, CC files are mixed, our make system will do 
> the right thing...
> 
> The symbols appear to be C++ symbols, or not?

shortly after sending my mail, I've seen this in the GNUmakefile.in of
PDFKit:

# Use C++ to link library (this won't work if g++ is not the obj-c compiler!)
#CC=@CXX@

Don't know what the problem is, what the comment describes, and
why the following line is commented out...

Sebastian



> 
> Ideas/suggestions/patches welcome.
> 
> Riccardo
> 
> 
>  From NetBSD:
> 
> configure:3536: checking for PDFKit
> configure:3552: gcc -o conftest -xobjective-c -MMD -MP -DGNUSTEP 
> -DGNUSTEP_BASE_LIBRARY=1 -DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 
> -DGNUSTEP_BASE_LIBRARY=1 -fno-strict-aliasing -fexceptions 
> -fobjc-exceptions -D_NATIVE_OBJC_EXCEPTIONS -pthread -fPIC -Wall 
> -DGSWARN -DGSDIAGNOSE -Wno-import -g -O2 -fgnu-runtime 
> -fconstant-string-class=NSConstantString 
> -I/Local/Library/Headers/ObjectiveC2 -fexec-charset=UTF-8 
> -I/usr/pkg/include -I. -I/usr/pkg/include 
> -I/home/multix/GNUstep/Library/Headers -I/Local/Library/Headers 
> -I/System/Library/Headers   -rdynamic -Wl,-R/usr/pkg/lib -L/usr/pkg/lib 
> -Wl,-R/usr/X11R6/lib -L/usr/X11R6/lib -pthread -shared-libgcc 
> -fexceptions -fgnu-runtime -L/home/multix/GNUstep/Library/Libraries 
> -L/Local/Library/Libraries -L/System/Library/Libraries 
> -Wl,-R/usr/pkg/lib -L/usr/pkg/lib -lgnustep-gui -lgnustep-base -lpthread 
> -lobjc -lm conftest.c  -lPDFKit >&5
> /Local/Library/Libraries/libPDFKit.so: warning: warning: tmpnam() 
> possibly used unsafely, use mkstemp() or mkdtemp()
> /Local/Library/Libraries/libPDFKit.so: undefined reference to `operator 
> new[](unsigned int)'
> /Local/Library/Libraries/libPDFKit.so: undefined reference to `operator 
> delete[](void*)'
> /Local/Library/Libraries/libPDFKit.so: undefined reference to `operator 
> delete(void*)'
> /Local/Library/Libraries/libPDFKit.so: undefined reference to 
> `__cxa_pure_virtual'
> /Local/Library/Libraries/libPDFKit.so: undefined reference to 
> `__gxx_personality_v0'
> /Local/Library/Libraries/libPDFKit.so: undefined reference to `vtable 
> for __cxxabiv1::__class_type_info'
> /Local/Library/Libraries/libPDFKit.so: undefined reference to `operator 
> new(unsigned int)'
> /Local/Library/Libraries/libPDFKit.so: undefined reference to `vtable 
> for __cxxabiv1::__si_class_type_info'
> c
> 
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