lfs/chapter05/diffutils-exp.xml
Marc Heerdink 8ac7439477 Bug 235
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@1368 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
2001-12-10 13:42:42 +00:00

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<sect2>
<title>Command explanations</title>
<para><userinput>CPPFLAGS=-Dre_max_failures=re_max_failures2:</userinput> The
CPPFLAGS variable is a variable that's read by the cpp program (C
PreProcessor). The value of this variable tells the preprocessor to
replace every instance of re_max_failures it finds by re_max_failures2
before handing the source file to the compiler itself for compilation. This
package has problems linking statically on systems that run an older
Glibc version and this construction fixes that problem.</para>
<para><userinput>PR_PROGRAM=/usr/bin/pr:</userinput> When 'diff' is called
with the '-i' flag, it tries to find 'pr' at the location specified with the
PR_PROGRAM variable. By default, this variable points to '/bin/pr', but since
we install 'pr' in /usr/bin, we need to change this.</para>
</sect2>