| Summary: | /usr/include/math.h has macros that are incompatible with icc 8.1. | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | Henrik Grubbström <grubba> |
| Component: | [OLD] Development | Assignee: | Karl Trygve Kalleberg (RETIRED) <karltk> |
| Status: | RESOLVED UPSTREAM | ||
| Severity: | major | CC: | nikolaymetchev, tove, xtv |
| Priority: | High | ||
| Version: | unspecified | ||
| Hardware: | IA64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
This is really an upstream bug. The label on the tin says icc should be compatible with gcc. In as much as it isn't (what a stupid sentence!), it's an bug with icc. That being said, I do agree we may want to come up with a workaround. Do you know how many packages your suggested workaround will break? Obsolete bug, current stable glibc is 2.3.6 or 2.4. |
/usr/include/math.h from sys-libs/glibc-2.3.4.20041102 contains the following segment: #if __USE_ISOC99 && __GNUC_PREREQ(2,97) /* ISO C99 defines some macros to compare number while taking care for unordered numbers. Many FPUs provide special instructions to support these operations. Generic support in GCC for these as builtins went in before 3.0.0, but not all cpus added their patterns. We define versions that use the builtins here, and <bits/mathinline.h> will undef/redefine as appropriate for the specific GCC version in use. */ # define isgreater(x, y) __builtin_isgreater(x, y) # define isgreaterequal(x, y) __builtin_isgreaterequal(x, y) # define isless(x, y) __builtin_isless(x, y) # define islessequal(x, y) __builtin_islessequal(x, y) # define islessgreater(x, y) __builtin_islessgreater(x, y) # define isunordered(u, v) __builtin_isunordered(u, v) #endif which appears to be enabled for icc when compiling with _GNU_SOURCE: $ cat fp_test.c #define _GNU_SOURCE #include <math.h> int main(int argc, char **argv) { return isless(0.1, 0.0); } $ icc -E fp_test.c | tail -n 5 # 3 "fp_test.c" int main(int argc, char **argv) { return __builtin_isless(0.1, 0.0); } $ icc -o fp_test fp_test.c /tmp/iccKdN1lv.o(.text+0x32): In function `main': : undefined reference to `__builtin_isless' Reproducible: Always Steps to Reproduce: 1. See above. Actual Results: The binary failed to link. Expected Results: It should have succeeded in linking the binary. # emerge info Portage 2.0.51-r8 (default-linux/ia64/2004.3, gcc-3.4.3, glibc-2.3.4.20041102-r0, 2.6.8-gentoo-r3 ia64) ================================================================= System uname: 2.6.8-gentoo-r3 ia64 Gentoo Base System version 1.6.7 Python: dev-lang/python-2.3.4 [2.3.4 (#1, Nov 29 2004, 11:29:43)] ccache version 2.3 [enabled] dev-lang/python: 2.3.4 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.5, 1.6.3, 1.8.5-r2, 1.7.9, 1.4_p6, 1.9.3 sys-devel/binutils: 2.14.90.0.8-r1, 2.15.92.0.2-r1 sys-devel/libtool: 1.5.2-r7 virtual/os-headers: 2.6.8.1, 2.6.8.1-r1 ACCEPT_KEYWORDS="ia64" AUTOCLEAN="yes" CFLAGS="-O2 -pipe" CHOST="ia64-unknown-linux-gnu" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/portage_overlay" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X acpi berkdb bitmap-fonts bzlib canna cjk crypt cups emacs encode f77 foomaticdb fortran freetds gdbm gif gmp gnutls gpm gtk gtk2 ia64 imlib ipv6 jpeg libg++ libwww maildir mbox mhash mikmod mime motif mule multilib mysql mysqli ncurses nis nls nptl odbc offensive oggvorbis opengl oss pam pcre pdflib perl pic pie png posix python qt quicktime readline recode samba sdl spell sqlite ssl tcpd tiff truetype unicode xml2 xmms xpm xv zlib" $ qpkg -I -v -f `type -path icc` dev-lang/icc-8.1.021 * Suggested work-around: Add a /opt/intel/intel_cc_80/include/math.h with content similar to the following: #ifndef __INTEL_MATH_H #define __INTEL_MATH_H 1 #include_next <math.h> #include <mathimf.h> #endif /* __INTEL_MATH_H */