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34 lines
1.3 KiB
XML
34 lines
1.3 KiB
XML
<sect2>
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<title>Command explanations</title>
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<para>
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<userinput>sed: </userinput> The sed command here searches for the
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string "$(CC) $(CFLAGS) -o" and replaces it by "$(CC) $(CFLAGS)
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$(LDFLAGS) -o" in the Makefile file. We make that modification so it
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will be easier to link bzip2 statically.
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</para>
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<para>
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<userinput>...Makefile | make -f -:</userinput> Makefile
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is the last parameter of the sed command which indicates the file to
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search and replace in. Sed normally sends the modified file to stdout
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(standard output), which will be the console. With the construction we
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use, sed's output will be piped to the make program. Normally, when make
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is started, it tries to find a number of files like Makefile. But we have
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modified the Makefile file so we don't want make to use it. The "-f -"
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parameter tells make to read it's input from another file, or from stdin
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(standard input) which the dash (-) implies. This is one way to do it.
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Another way would be to have sed write the output to a different file
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and tell make with the -f parameter to read that alternate file.
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</para>
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<para>
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<userinput>LDFLAGS=-static:</userinput> This is the second way we use to
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link a package statically. This is also the most common way.
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The -all-static value is only used with the binutils and the gettext
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packages and won't be used throughout the rest of this book.
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</para>
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</sect2>
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