Package: mingw32
Version: 3.4.2.20040916.1-2
Severity: normal
Hi,
there is a problem with the binaries created by the cross-compiler; if
they use the standard C++ library to access big files, seeking beyond
4GB does not appear to work.
For a loong time, this was an upstream problem, but it was fixed with
mingw.org's 3.4.0 release. Unfortunately, it still happens with
binaries that I cross-compile from Debian. :-(
The small program below prints the correct value "63" when compiled
under Windows XP using mingw.org's binaries, but prints "-1
strerror: no error" (i.e. EOF) when cross-compiled.
Working configurations on Windows were all the post-3.4.0 ones that I
tried. Today, I specifically re-checked that the following results in
working binaries:
gcc-core-3.4.1-20040711-1.tar.gz
gcc-g++-3.4.1-20040711-1.tar.gz
w32api-2.5.tar.gz
mingw-runtime-3.3.tar.gz
gcc-core-3.4.2-20040916-1.tar.gz
gcc-g++-3.4.2-20040916-1.tar.gz
w32api-2.5.tar.gz (sorry, forgot upgrading that)
mingw-runtime-3.7.tar.gz
"g++ -v" prints this:
Reading specs from C:/msys/1.0/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)
A fix for this would be very much appreciated!! - Compiling on Windows
with MSYS is such a PITA! :-/
----------------------------------------------------------------------
#include <fstream>
#include <iostream>
#include <string.h>
using namespace std;
int main() {
fstream f("testfile", ios::binary|ios::in|ios::out|ios::trunc);
#ifdef __MINGW32__
unsigned long long left = 0x100001000ULL;
char buf[4096];
memset(buf, 0, 4096);
f.write(buf, 4096);
f.write("[EMAIL PROTECTED]", 10); // 64 aka '@' at 0x1004
f.write(buf, 4096 - 10);
left -= 8192;
while (left > 0) {
f.write(buf, 4096);
left -= 4096;
}
#else
f.seekp(0x100001000ULL);
#endif
f.write("YADA?YADA!", 10);
f.seekg(0x100001004ULL);
cout << f.get() << endl; // Should print 63 for the '?' at 0x100001004
cout << "strerror: " << strerror(errno) << endl;
}
----------------------------------------------------------------------
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (990, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.4.27
Locale: LANG=C, LC_CTYPE=de_DE (charmap=ISO-8859-15)
Versions of packages mingw32 depends on:
ii libc6 2.3.2.ds1-20 GNU C Library: Shared libraries an
ii mingw32-binutils 2.15.94-20050118.1-1 Minimalist GNU win32 (cross) binut
ii mingw32-runtime 3.7-1 Minimalist GNU win32 (cross) runti
-- no debconf information
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