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Date: Fri, 30 May 2008 17:49:41 -0500
From: "C S" <usmgoldeneagle AT gmail DOT com>
To: cygwin <cygwin AT cygwin DOT com>
Subject: Cygwin - linker errors - __assert, __itob and __ftol
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hi all - i am trying to compile a C++ native library using the
shapelibrary. the one for linux is built but in cygwin i seem to be
having some linker error problems and i have to assume it has to do
with something regarding MSVC. i am including Java because i am using
JNI to talk back and forth to Java. libShapeData.dll is my own native
library that i want to build for windows.

at the cygwin prompt:

gcc -D__int64="long long" -shared -I\C:\Apps\Java\jdk1.6.0_05\include
-I\C:\Apps\Java\jdk1.6.0_05\include\win32 -I\c:\Users\usmsci\My
Documents\shapefiles\shapelib128_bin_win -L\c:\Users\usmsci\My
Documents\shapefiles\shapelib128_bin_win myFile.cpp -o
libShapeData.dll c:\Users\usmsci\My
Documents\shapefiles\shapelib128_bin_win\shpopen.obj
c:\Users\usmsci\My
Documents\shapefiles\shapelib128_bin_win\dbfopen.obj

the errors i get are:

Warning: .drectve '-defaultlib:LIBC' - unrecognized
Warning: .drectve '-defaultlib:OLDNAMES' - unrecognized
Warning: .drectve '-defaultlib:LIBC' - unrecognized
Warning: .drectve '-defaultlib:OLDNAMES' - unrecognized

c:\Users\usmsci\My Documents\shapefiles\shapelib128_bin_win\shpopen.o:shpopen.c
(.text+0x1485):undefined reference to __assert

the same thing happens for dbfopen.c. other undefined references
include __ftol and __itob. those are the only 3.

is there a compiler option that i can use or is there a way to somehow
rebuild the shapefile library somehow? i am really not sure what is
going on here - so it is kind of hard what to specifically ask. thanks
all for the help in advance!

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