On 12/17/2011 9:24 AM, Ozkan Sezer wrote:
> On Sat, Dec 17, 2011 at 4:49 PM, David Cleaver wrote:
>> Hello Everyone,
>>
>> I seem to have run into an issue with printf with my native toolchain that
>> someone else with the cross-compiler does not have. I was hoping someone
>> here
>> could help us track down what might be the difference between our two builds.
>>
>> We ran tests based off of the following test program:
>> #include<stdio.h>
>> #include<inttypes.h>
>>
>> int main(void) {
>> uintmax_t x = 1125899906842749LL;
>> printf("%llu\n", x);
>
> %ll isn't supported by printf family from msvcrt.dll, so try
> defining __USE_MINGW_ANSI_STDIO=1 and recompile so
> that your code uses __mingw_printf()& co.
I know that putting
#define __USE_MINGW_ANSI_STDIO 1
at the top of the code will allow my build to be able to use %llu to print the
64-bit variable. However, I'm wondering why his compiler warns about the
unknown llu modifier, but still prints the full 64-bit value. How can we track
down why it works for him, but not for me?
>
>> return 0;
>> }
>> -------------------------------------------------------------------
>>
>> When he compiles with -Wall and runs the program he gets:
>> C:\> x86_64-w64-mingw32-gcc -o try.exe try.c -Wall
>> try.c: In function 'main':
>> try.c:7:2: warning: unknown conversion type character 'l' in format
>> [-Wformat]
>> try.c:7:2: warning: too many arguments for format [-Wformat-extra-args]
>>
>> C:\> try
>> 1125899906842749
>>
>> -------------------------------------------------------------------
>>
>> When I compile with -Wall and run the program I get:
>> $ gcc -o try.exe try.c -Wall
>> try.c: In function 'main':
>> try.c:6: warning: unknown conversion type character 'l' in format
>> try.c:6: warning: too many arguments for format
>>
>> $ try
>> 125
>>
>> -------------------------------------------------------------------
>>
>> When he runs gcc -v he gets:
>> C:\>x86_64-w64-mingw32-gcc -v
>> Using built-in specs.
>> COLLECT_GCC=x86_64-w64-mingw32-gcc
>> COLLECT_LTO_WRAPPER=c:/_64/alt/bin/../libexec/gcc/x86_64-w64-mingw32/4.7.0/lto-wrapper.exe
>> Target: x86_64-w64-mingw32
>> Configured with: ../../../build/gcc/src/configure
>> --target=x86_64-w64-mingw32 --
>> prefix=/c/bb/vista64-mingw32/mingw-x86-x86_64/build/build/root
>> --with-sysroot=/c
>> /bb/vista64-mingw32/mingw-x86-x86_64/build/build/root
>> --enable-languages=all,obj
>> -c++ --enable-fully-dynamic-string --disable-multilib
>> Thread model: win32
>> gcc version 4.7.0 20110410 (experimental) (GCC)
>>
>> -------------------------------------------------------------------
>>
>> When I run 'gcc -v', I get:
>> $ gcc -v
>> Using built-in specs.
>> Target: x86_64-w64-mingw32
>> Configured with: ../gcc44-svn/configure --host=x86_64-w64-mingw32
>> --target=x86_64-w64-mingw32 --disable-multilib --enable-checking=release
>> --prefix=/mingw64 --with-sysroot=/mingw64
>> --enable-languages=c,c++,fortran,objc,obj-c++ --enable-libgomp
>> --with-gmp=/mingw64 --with-mpfr=/mingw64 --disable-nls
>> --disable-win32-registry
>> Thread model: win32
>> gcc version 4.4.5 20101001 (release) [svn/rev.164871 - mingw-w64/oz] (GCC)
>>
>> -------------------------------------------------------------------
>>
>> He has informed me that he is not in a cygwin environment. However, I
>> forgot to
>> ask what OS he was using. He should be watching this thread so if anyone has
>> questions for him he can answer them on-list. He said he was using:
>> "I'm using one of the "Automated Builds" provided by the mingw64.sf team.
>> It's
>> version 4.7.0. (MinGW, no Cygwin btw.)"
>>
>> I am using an old sezero personal build from 2010-10-03, and I am on Windows
>> XP
>> x64. I compiled/ran inside of an Msys shell.
>>
>> Can someone help us track down why his binary prints out the full 64-bit
>> number
>> and my binary prints out only the lower 32-bits of the 64-bit number? Thank
>> you
>> for your time.
>>
>> -David C.
>
> --
> O.S.
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