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git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@12817 af4574ff-66df-0310-9fd7-8a98e5e911e0
38 lines
1.4 KiB
XML
38 lines
1.4 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE note PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<!-- $LastChangedBy: $
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$Date: $ -->
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<sect3>
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<title>Choosing Qt Program Versions</title>
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<para>If you install both Qt4 and Qt5, you can use some simple
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scripts to select the currently active set of Qt programs. As the
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<systemitem class="username">root</systemitem> user, create
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the following scripts:</para>
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<screen role="root"><userinput>cat > /usr/bin/setqt4 << 'EOF'
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<literal>if [ "x$QT5DIR" != "x/usr" ]; then pathremove $QT5DIR/bin; fi
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if [ "x$QT4DIR" != "x/usr" ]; then pathprepend $QT4DIR/bin; fi
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echo $PATH</literal>
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EOF</userinput></screen>
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<screen role="root"><userinput>cat > /usr/bin/setqt5 << 'EOF'
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<literal>if [ "x$QT4DIR" != "x/usr" ]; then pathremove $QT4DIR/bin; fi
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if [ "x$QT5DIR" != "x/usr" ]; then pathprepend $QT5DIR/bin; fi
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echo $PATH</literal>
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EOF</userinput></screen>
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<para>You should now be able to use the appropriate Qt version by running
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<command>source setqt4</command> or <command>source setqt5</command> as
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desired. (Setting the PATH wont work in a subshell.) Another technique that
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can be used is to create appropriate alias additions to your ~/.bashrc like
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<command>alias setqt4='source setqt4'</command>.</para>
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</sect3>
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