x86_64-w64-mingw32 test FAIL t-scanf.c:1477: GNU MP assertion failed: ret == (-1)
Paul.Zimmermann at inria.fr
Sat Apr 1 17:36:02 UTC 2017
> Should we pass this option for mingw on GMP's configure.ac?
> Or do people expect broken libc on this platform...?
note we have this in MPFR INSTALL file:
3 - To avoid using the Microsoft runtime (which might not be conform to ISO C),
you can use the MinGW runtime package (which is an integral part of MinGW).
For example, with MinGW versions 3.15 and later you can get an
ISO-compliant printf() if you compile your application with either
'-ansi', '-posix' or '-D__USE_MINGW_ANSI_STDIO'. In order to have the
MPFR formatted output functions based on ISO-compliant printf(), you
need to compile GMP (not MPFR) with CC="gcc -D__USE_MINGW_ANSI_STDIO"
(since the standard printf modifiers %e, %Ld and %td are passed to GMP).
Not doing so may result in failures of some of the printf-related tests.
For instance, the following error on some Windows machine has been
Error in mpfr_vsprintf (s, "%e", ...);
FAIL tsprintf.exe (exit status: 1)
The cause is that here the C functions vsnprintf and vsprintf used
internally in GMP do not produce the same output:
Building MPFR with -D__USE_MINGW_ANSI_STDIO is currently useless except
for some error messages in the test suite.
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