Package: gcc-4.6,gcc-4.7 Version: 4.6.3-15 Severity: normal Dear Maintainer,
this bug manifest itself on ia64, powerpc and s390x where gcc-4.6 is used and the optmized code (-O2) fails to produce correct math results. This code from libgd2:src/gd.c:clip_1d: *y1 -= m * (*x1 - mindim); where m = (double) -0.050000 *x1 = -200 mindim = 0 *y1 = 15 results in *y1 = 4, which is incorrect value, since it should be 5. Most simple workaround, which allows gcc to produce correct value: *y1 -= (int)(m * (*x1 - mindim)); Assigning to some other variable also works ok: int t; t = m * (*x1 - mindim); *y1 -= t; Compiling with -O0 also produces correct value. gcc-4.7 is unfortunatelly also affected. I just hope we don't compile the nuclear reactor controls with gcc :) O. -- System Information: Debian Release: 7.0 APT prefers unstable APT policy: (500, 'unstable') Architecture: ia64 Kernel: Linux 2.6.32-5-mckinley (SMP w/2 CPU cores) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/dash Versions of packages gcc-4.6 depends on: ii binutils 2.22-8 ii cpp-4.6 4.6.3-15 ii gcc-4.6-base 4.6.3-15 ii libc6.1 2.13-38 ii libgcc1 1:4.7.2-5 ii libgmp10 2:5.0.5+dfsg-2 ii libgomp1 4.7.2-5 ii libmpc2 0.9-4 ii libmpfr4 3.1.1-1 ii libquadmath0 4.7.2-5 ii libunwind7-dev 0.99-0.3 ii zlib1g 1:1.2.7.dfsg-13 Versions of packages gcc-4.6 recommends: ii libc6.1-dev 2.13-38 Versions of packages gcc-4.6 suggests: pn gcc-4.6-doc <none> pn gcc-4.6-locales <none> pn libgcc1-dbg <none> pn libgomp1-dbg <none> pn libmudflap0-4.6-dev <none> pn libmudflap0-dbg <none> pn libquadmath0-dbg <none> -- no debconf information -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130426102753.12895.7039.reportbug@localhost6.localdomain6