When setting CXXFLAGS, don't override what could be set already by a

user, just add to it.


git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@718 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter05/grep-inst.xml

@@ -6,7 +6,7 @@ Install Grep by running the following commands:
 </para>
 
 <blockquote><literallayout>
-	<userinput>export CPPFLAGS=-Dre_max_failures=re_max_failures2 
+	<userinput>export CPPFLAGS=-Dre_max_failures=re_max_failures2
 		&amp;&amp;</userinput>
 	<userinput>./configure --prefix=$LFS/usr --disable-nls
 		 &amp;&amp;</userinput>

chapter06/groff-inst.xml

@@ -6,8 +6,8 @@ Install Groff by running the following commands:
 </para>
 
 <blockquote><literallayout>
-	<userinput>CXXFLAGS=-Dstrerror=strerror ./configure --prefix=/usr
-		&amp;&amp;</userinput>
+	<userinput>CXXFLAGS="-Dstrerror=strerror $CXXFLAGS" ./configure
+		--prefix=/usr &amp;&amp;</userinput>
 	<userinput>make &amp;&amp;</userinput>
 	<userinput>make install</userinput>
 </literallayout></blockquote>