Hello there,
i think the following problem has to do with cygwin, cause libcygwin.a
has an undefined reference.
I get the error message when compiling my little testprogram.
The Programm and complete compiler messages follow:
*************************************************************
// reading a text file
#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <string.h>
using namespace std;
class tryit {
char *FILE_POSTFIX;// = new "myfile.txt"; <- ausserhalb nicht möglich
string posti;
public:
int main (int argc, char** argv) {
FILE_POSTFIX = new char[10]; //"Nodes.txt"; <- erst allocieren dann
zuweisen !
FILE_POSTFIX = "NODES.txt";
char *filename = FILE_POSTFIX;
char *output;
ifstream in (filename) ;
while (in){
in >> output ;
cout << output << endl;
return 0;
}
}
};
*************************************************************
g++ -v -Wall -Wno-deprecated tryme.cpp -o testthings.exe
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/specs
Configured with: /GCC/gcc-3.3.1-3/configure --with-gcc --with-gnu-ld
--with-gnu-as --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc
--libdir=/usr/lib --libexecdir=/usr/sbin --mandir=/usr/share/man
--infodir=/usr/share/info
--enable-languages=c,ada,c++,f77,pascal,java,objc --enable-libgcj
--enable-threads=posix --with-system-zlib --enable-nls
--without-included-gettext --enable-interpreter --enable-sjlj-exceptions
--disable-version-specific-runtime-libs --enable-shared
--disable-win32-registry --enable-java-gc=boehm
--disable-hash-synchronization --verbose --target=i686-pc-cygwin
--host=i686-pc-cygwin --build=i686-pc-cygwin
Thread model: posix
gcc version 3.3.1 (cygming special)
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/cc1plus.exe -quiet -v
-D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=1 -D__CYGWIN32__
-D__CYGWIN__ -Dunix -D__unix__ -D__unix -idirafter
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../include/w32api
-idirafter
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cygwin/lib/../../include/w32api
tryme.cpp -D__GNUG__=3 -quiet -dumpbase tryme.cpp -auxbase tryme -Wall
-Wno-deprecated -version -o /cygdrive/d/TMP/cc55YaOO.s
GNU C++ version 3.3.1 (cygming special) (i686-pc-cygwin)
compiled by GNU C version 3.3.1 (cygming special).
GGC heuristics: --param ggc-min-expand=47 --param ggc-min-heapsize=32700
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/usr/i686-pc-cygwin/include"
ignoring duplicate directory "/usr/i686-pc-cygwin/lib/../../include/w32api"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/3.3.1
/usr/include/c++/3.3.1/i686-pc-cygwin
/usr/include/c++/3.3.1/backward
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/include
/usr/include
/usr/include/w32api
End of search list.
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cygwin/bin/as.exe
--traditional-format -o /cygdrive/d/TMP/ccbPwKZW.o
/cygdrive/d/TMP/cc55YaOO.s
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/collect2.exe -Bdynamic
--dll-search-prefix=cyg -o testthings.exe
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../crt0.o
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtbegin.o
-L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1
-L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../..
/cygdrive/d/TMP/ccbPwKZW.o -lstdc++ -lgcc -lcygwin -luser32 -lkernel32
-ladvapi32 -lshell32 -lgcc /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtend.o
/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../libcygwin.a(libcmain.o)(.text+0x7c):
undefined reference to `_WinMain@16'
collect2: ld returned 1 exit status
make: *** [testthings.exe] Error 1
Compilation exited abnormally with code 2 at Tue May 18 11:05:17
Regards Christian Rudiger
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