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