autoresolving 'native' in build script

madpenguin · #1 (**permalink**) 10-07-2008

Greets. I have a build system that comprises of one parent script and about 150 children to build Gnome. I have a file that is sourced at the top of every script to gather variables needed for the build. In this variables file, CFLAGS are set.

What I would like to do is do a quick check somewhere for the use of -march=native. If found, I'd like to translate native into a static CPU opt to use for the package name ($ARCH). This is on Slackware BTW. Having a package named "foo-1.2.3-native-1.tgz" doesn't really tell you what $ARCH the package is for.....

Haven't thought of how I'm going to actually implement this yet so all build scripts have it available, but right now, I had a quick C file compilation in mind, supplying gcc with the verbose flag and then grep for the $ARCH? Eh..... I don't know. Sounds a little sloppy maybe. Especially if I had to do that for each child.

Anyone have any cool idea's for this? Thanks all.

madpenguin · #2 (**permalink**) 10-12-2008

Not the prettiest of things but works....

Code:

echo "main(){}" > test.c
gcc -v -march=native -o test test.c 2>cpu
ARCH=$(cat cpu | grep -o "march=.*" | sed -e 's/ .*//' -e 's/march=//')
echo $ARCH

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