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Quellcode

checkGCCVersion()
{
    app=$1; shift
    eval `$app -v 2>&1 | \
        sed -n -e '/[Vv]ersion/s/.* [a-z\-]*\([0-9]*\)\.\([0-9]*\).\([0-9]*\).*/GCCdist=\1;GCCmajor=\2;GCCminor=\3/p'`
    GCCversion="${GCCdist}.${GCCmajor}.${GCCminor}"; export GCCversion
    if [ ${GCCdist} -gt $1 ]; then
        return 0
    fi
    if [ ${GCCdist} -eq $1 ]; then
        if [ ${GCCmajor} -gt $2 ]; then
            return 0
        fi
        if [ ${GCCmajor} -eq $2 -a ${GCCminor} -ge $3 ]; then
            return 0
        fi
    fi
    return 1
}

Quellcode

# gcc -v
gcc version 4.1.2 (Gentoo 4.1.2)

Quellcode

# gcc -v
gcc-Version 4.2.0 (Gentoo 4.2.0 p1.4)

Quellcode

#! /bin/sh
checkGCCVersionDEMO()
{
    echo $* 2>&1 | sed -n -e '/[Vv]ersion/s/.* [a-z\-]*\([0-9]*\)\.\([0-9]*\).\([0-9]*\).*/GCCdist=\1;GCCmajor=\2;GCCminor=\3/p'
    GCCversion="${GCCdist}.${GCCmajor}.${GCCminor}"; export GCCversion
}

# Good version numbers
GCC_GOOD_1="gcc version 4.1.2 (Gentoo 4.1.2)"
GCC_GOOD_2="gcc version 4.1.2"
GCC_GOOD_3="gcc version 4.2.0"

# Bad, very bad version numbers
GCC_BAD_1="gcc-Version 4.2.0 (Gentoo 4.2.0 p1.4)"
GCC_BAD_2="gcc-Version 4.2.0 (built on 02.08.2007)"

# --- test ---
echo "testing string: " "$GCC_GOOD_1"; checkGCCVersionDEMO $GCC_GOOD_1; echo
echo "testing string: " "$GCC_GOOD_2"; checkGCCVersionDEMO $GCC_GOOD_2; echo
echo "testing string: " "$GCC_GOOD_3"; checkGCCVersionDEMO $GCC_GOOD_3; echo

echo "testing string: " "$GCC_BAD_1"; checkGCCVersionDEMO $GCC_BAD_1; echo
echo "testing string: " "$GCC_BAD_2"; checkGCCVersionDEMO $GCC_BAD_2; echo

Quellcode

testing string:  "gcc version 4.1.2 (Gentoo 4.1.2)"
GCCdist=4;GCCmajor=1;GCCminor=2

testing string:  "gcc version 4.1.2"
GCCdist=4;GCCmajor=1;GCCminor=2

testing string:  "gcc version 4.2.0"
GCCdist=4;GCCmajor=2;GCCminor=0

testing string:  "gcc-Version 4.2.0 (Gentoo 4.2.0 p1.4)"
GCCdist=1;GCCmajor=4;GCCminor=

testing string:  "gcc-Version 4.2.0 (built on 02.08.2007)"
GCCdist=02;GCCmajor=08;GCCminor=2007