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Diffstat (limited to 'doc/numbench.1')
| -rw-r--r-- | doc/numbench.1 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/doc/numbench.1 b/doc/numbench.1 index f7c3905..e429c8b 100644 --- a/doc/numbench.1 +++ b/doc/numbench.1 @@ -88,6 +88,22 @@ atlas-gcc-4.6.1 sci-libs/atlas-3.9.46 CC=gcc-4.6.1 CFLAGS="-O3 -march=native" .PP Variables that affect the emerge process, such as USE, can be used and are effective. +Another possibility to set the environment used during the emerge process is +writing a bash script that uses the export directives. These files have to be +specified added to the line with a leading @ mark. More files can be specified; +in this case the latter files override the variables in case of collisions; +the environment variables that are specified on the configuration line override +the variables set through files in case of collisions. The files can be +specified with both a relative path or an absolute one. The following examples +show this feature: + +.RS +atlas-gcc sci-libs/atlas-3.9.46 @envforatlas.sh @envforgcc + +atlas-gcc sci-libs/atlas-3.9.46 @envforatlas.sh CC=gcc-4.6.1 CFLAGS="-O3" +.RE + +.PP More configuration options are available. As each package can install many implementations of the same library (for instance, the sci-libs/atlas package installs the serial version and the |