GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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#!/bin/sh -ex
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TMP="$1".tmp
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DST="$1"
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# Determine build version and date
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GAP_BUILD_VERSION="4.8.10, 15-Jan-2018, build"
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if command -v git >/dev/null 2>&1 ; then
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  if test -d .git ; then
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    GAP_BUILD_VERSION=`git describe --tags --dirty || echo`
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  fi
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fi
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GAP_BUILD_DATE=`date +"%Y-%m-%d %H:%M:%S (%Z)"`
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# Generate the file
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cat > "$TMP" <<EOF
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#ifndef GAP_BUILD_VERSION
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#define GAP_BUILD_VERSION  "$GAP_BUILD_VERSION"
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#define GAP_BUILD_DATETIME "$GAP_BUILD_DATE"
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#endif
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EOF
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# Only copy the header over if there were any changes, to
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# avoid pointless recompiles.
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if ! cmp -s $TMP $DST ; then
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  cp "$TMP" "$DST"
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fi;
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rm $TMP
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