Re: [gentoo-amd64] GCC 4 CFLAGS

[David Fellows]

Peter Humphrey wrote:
> I've started a new thread because the old one had drifted.
>
> While trying Duncan's CFLAGS I found I couldn't emerge imagemagick because
> it didn't recognise -combine or -ftree-pre. So I removed those
> from /etc/make.conf and reran emerge imagemagick. Weirdness. Here are some
> extracts from the compilation log:
snip...
> x86_64-pc-linux-gnu-gcc -c  -I../ -I.. -I/usr/include/freetype2 -I/usr/includ
> e/libxml2 -D_REENTRANT -D_GNU_SOURC
> E -DTHREADS_HAVE_PIDS -fno-strict-aliasing -pipe -Wdeclaration-after-statemen
> t -D_LARGEFILE_SOURCE -D_FILE_OFFSE
> T_BITS=64 -march=k8 -Os -pipe -frename-registers -fweb -freorder-blocks -freo
> rder-blocks-and-partition -funit-at
> -a-time -fgcse-sm -fgcse-las -fgcse-after-reload -fmerge-all-constants -Wall
> -pthread -march=k8 -O2 -pipe -frena
> me-registers -fweb -freorder-blocks -freorder-blocks-and-partition -combine -
> funit-at-a-time -ftree-pre -fgcse-s
> m -fgcse-las -fgcse-after-reload -fmerge-all-constants   -DVERSION=\"6.2.9\"
> -DXS_VERSION=\"6.2.9\" -fPIC "-I/us
> r/lib64/perl5/5.8.8/x86_64-linux-thread-multi/CORE"  -DHAVE_CONFIG_H
> Magick.c
> x86_64-pc-linux-gnu-gcc: unrecognized option `-combine'
> cc1: error: unrecognized command line option "-ftree-pre"
snip...
>
> So I removed -rf  /var/tmp/portage/imagemagick-6.2.9.5-r1 and got exactly
> the same result!
>
> Can anyone see what I'm doing wrong? Perhaps another C flag is pulling those
> two in.

Well -combine is a gcc 4.1.1 option, it is not a gcc 3.x option.
I would guess you are not compileing using gcc 4.1.1. Why you aren't is
another question....

Use gcc-select 
to see what is set for your default gcc and reset it if need be.

Dave F

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