Bug 87841 – pam-login fails to emerge with -mfpmath=sse in CFLAGS

• Product: Gentoo Linux
• Status: RESOLVED INVALID

[Description Tomas Doran 2005-04-03 14:09:26 UTC]

CFLAGS="-O3 -march=i686 -fomit-frame-pointer -fmove-all-movables -mfpmath=sse -funroll-loops -fforce-addr -falign-functions=4 -ffast-math -frerun-cse-after-loop -frerun-loop-opt -fshort-enums -fshared-data -mno-push-args -fmerge-all-constants -pipe"

Making all in src
make[2]: Entering directory `/var/tmp/portage/pam-login-3.14/work/pam_login-3.14/src'
if i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -DLOCALEDIR=\"/usr/share/locale\" -I. -I. -I.. -I. -DLOCALEDIR=\"/usr/share/locale\"   -W -Wall -Wbad-function-cast -Wcast-align -Wcast-qual -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef -Werror -O3 -march=i686 -fomit-frame-pointer -fmove-all-movables -mfpmath=sse -funroll-loops -fforce-addr -falign-functions=4 -ffast-math -frerun-cse-after-loop -frerun-loop-opt -fshort-enums -fshared-data -mno-push-args -fmerge-all-constants -pipe -O3 -march=i686 -fomit-frame-pointer -fmove-all-movables -mfpmath=sse -funroll-loops -fforce-addr -falign-functions=4 -ffast-math -frerun-cse-after-loop -frerun-loop-opt -fshort-enums -fshared-data -mno-push-args -fmerge-all-constants -pipe -MT failure.o -MD -MP -MF ".deps/failure.Tpo" \
  -c -o failure.o `test -f 'failure.c' || echo './'`failure.c; \
then mv -f ".deps/failure.Tpo" ".deps/failure.Po"; \
else rm -f ".deps/failure.Tpo"; exit 1; \
fi
cc1: warning: SSE instruction set disabled, using 387 arithmetics
make[2]: *** [failure.o] Error 1
make[2]: Leaving directory `/var/tmp/portage/pam-login-3.14/work/pam_login-3.14/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/pam-login-3.14/work/pam_login-3.14'
make: *** [all] Error 2

!!! ERROR: sys-apps/pam-login-3.14 failed.
!!! Function src_compile, Line 53, Exitcode 2




Reproducible: Always
Steps to Reproduce:
1. My CFLAGS are above. -mfpmath=sse is needed to produce the problem, other flags may not be.
2. emerge pam-login


Actual Results:  
Compile broke.

Expected Results:  
Package should have merged. Removing -mfpmath=sse produced correct results.


Reading specs from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5/specs
Configured with: /var/tmp/portage/gcc-3.3.5-r1/work/gcc-3.3.5/configure
--enable-version-specific-runtime-libs --prefix=/usr
--bindir=/usr/i686-pc-linux-gnu/gcc-bin/3.3.5
--includedir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5/include
--datadir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3.5
--mandir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3.5/man
--infodir=/usr/share/gcc-data/i686-pc-linux-gnu/3.3.5/info
--with-gxx-include-dir=/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.5/include/g++-v3
--host=i686-pc-linux-gnu --disable-altivec --enable-nls
--without-included-gettext --with-system-zlib --disable-checking
--disable-werror --disable-libunwind-exceptions --disable-multilib
--enable-languages=c,c++,java,f77 --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 3.3.5  (Gentoo Linux 3.3.5-r1, ssp-3.3.2-3, pie-8.7.7.1)

Portage 2.0.51.19 (default-linux/x86/2004.0, gcc-3.3.5, glibc-2.3.4.20041102-r1,
2.6.7-gentoo-r11 i686)
=================================================================
System uname: 2.6.7-gentoo-r11 i686 Intel(R) Pentium(R) 4 CPU 1.60GHz
Gentoo Base System version 1.4.16
Python:              dev-lang/python-2.3.4-r1 [2.3.4 (#1, Apr  3 2005, 17:07:04)]
distcc 2.16 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled]
ccache version 2.3 [enabled]
dev-lang/python:     2.3.4-r1
sys-devel/autoconf:  2.59-r6, 2.13
sys-devel/automake:  1.7.9-r1, 1.8.5-r3, 1.5, 1.4_p6, 1.6.3, 1.9.4
sys-devel/binutils:  2.15.92.0.2-r1
sys-devel/libtool:   1.5.10-r4
virtual/os-headers:  2.6.8.1-r2
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CFLAGS="-O3 -march=i686 -fomit-frame-pointer -fmove-all-movables -mfpmath=sse
-funroll-loops -fforce-addr -falign-functions=4 -ffast-math
-frerun-cse-after-loop -frerun-loop-opt -fshort-enums -fshared-data
-mno-push-args -fmerge-all-constants -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/NX/etc /usr/kde/2/share/config /usr/kde/3/share/config
/usr/share/config /var/bind /var/qmail/alias /var/qmail/control
/var/vpopmail/domains /var/vpopmail/etc"
CONFIG_PROTECT_MASK="/etc/gconf /etc/phppgadmin/config.inc.php /etc/terminfo
/usr/X11R6/lib/X11/xkb /etc/env.d"
CXXFLAGS="-O3 -march=i686 -fomit-frame-pointer -fmove-all-movables -mfpmath=sse
-funroll-loops -fforce-addr -falign-functions=4 -ffast-math
-frerun-cse-after-loop -frerun-loop-opt -fshort-enums -fshared-data
-mno-push-args -fmerge-all-constants -pipe -fvtable-gc -ffunction-sections
-finline-functions"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms"
GENTOO_MIRRORS="ftp://ftp.easynet.nl/mirror/gentoo/
ftp://ftp.snt.utwente.nl/pub/os/linux/gentoo
ftp://linux.rz.ruhr-uni-bochum.de/gentoo-mirror/"
MAKEOPTS="-j1"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.uk.gentoo.org/gentoo-portage"
USE="x86 acl apache2 apm arts avi berkdb bitmap-fonts caps cdr crypt cups curl
emboss encode ethereal fam flac font-server foomaticdb fortran gcj gd gdbm gif
gpm imagemagick imap imlib ipv6 jabber java jpeg junit kde ldap libg++ libwww
mad maildir mikmod motif mp3 mpeg msn ncurses nls offensive oggvorbis oss pam
pdflib perl php png postgres prd python quicktime readline sdl slang spell ssl
tcltk tcpd tiff truetype truetype-fonts type1-fonts usb vhosts xml2 zlib"
Unset:  ASFLAGS, CBUILD, CTARGET, LANG, LC_ALL, LDFLAGS, PORTDIR_OVERLAY

[Comment 1 Carsten Lohrke (RETIRED) 2005-04-03 17:06:59 UTC]

Tomas: May be a valid bug, but please don't use such an insane combination of compiler flags. It doesn't make your box faster and every developer is absolutely correct to resolve any of your bug reports as invalid.

[Comment 2 Diego Elio Pettenò (RETIRED) 2005-05-20 06:24:26 UTC]

The problem is due by the -Werror which makes the compiler fails with warnings  
(useful when something is critical so that a warning can be a problem).  
Passing -mfpmath=sse throws warning because it can't be used and make the  
package fail.  
I think the best solution is simply not use that flag at all, I don't think  
it's the case of removing -Werror because this is a critical package. Also,  
the warning is probably caused by the CFLAGS combination itself.  
 

[Comment 3 Diego Elio Pettenò (RETIRED) 2005-06-05 13:06:00 UTC]

Instruction already given.