q

1 files changed, 81 insertions, 69 deletions

diff --git a/chapter02/hostreqs.xml b/chapter02/hostreqs.xml
index 52ccc97ed..d8e6f06d2 100644
--- a/chapter02/hostreqs.xml
+++ b/chapter02/hostreqs.xml
@@ -165,78 +165,90 @@
   the ability to compile programs, run the following commands:</para>
 
 <screen role="nodump"><userinput>cat &gt; version-check.sh &lt;&lt; "EOF"
-<literal>#!/bin/bash
-# Simple script to list version numbers of critical development tools
-export LC_ALL=C
-bash --version | head -n1 | cut -d" " -f2-4
-MYSH=$(readlink -f /bin/sh)
-echo "/bin/sh -&gt; $MYSH"
-echo $MYSH | grep -q bash || echo "ERROR: /bin/sh does not point to bash"
-unset MYSH
-
-echo -n "Binutils: "; ld --version | head -n1 | cut -d" " -f3-
-bison --version | head -n1
-
-if [ -h /usr/bin/yacc ]; then
-  echo "/usr/bin/yacc -> `readlink -f /usr/bin/yacc`";
-elif [ -x /usr/bin/yacc ]; then
-  echo yacc is `/usr/bin/yacc --version | head -n1`
-else
-  echo "yacc not found"
-fi
-
-echo -n "Coreutils: "; chown --version | head -n1 | cut -d")" -f2
-diff --version | head -n1
-find --version | head -n1
-gawk --version | head -n1
-
-if [ -h /usr/bin/awk ]; then
-  echo "/usr/bin/awk -&gt; `readlink -f /usr/bin/awk`";
-elif [ -x /usr/bin/awk ]; then
-  echo awk is `/usr/bin/awk --version | head -n1`
-else
-  echo "awk not found"
-fi
-
-gcc --version | head -n1
-g++ --version | head -n1
-grep --version | head -n1
-gzip --version | head -n1
-cat /proc/version
-m4 --version | head -n1
-make --version | head -n1
-patch --version | head -n1
-echo Perl `perl -V:version`
-python3 --version
-sed --version | head -n1
-tar --version | head -n1
-makeinfo --version | head -n1  # texinfo version
-xz --version | head -n1
-
-echo 'int main(){}' &gt; dummy.c &amp;&amp; g++ -o dummy dummy.c
-if [ -x dummy ]
-  then echo "g++ compilation OK";
-  else echo "g++ compilation failed"; fi
-rm -f dummy.c dummy</literal>
+<literal> #!/bin/bash
+# A script to list version numbers of critical development tools
+
+# If you have tools installed in other directories, adjust PATH here AND
+# in ~lfs/.bashrc (section 4.4) as well.
+
+LC_ALL=C 
+PATH=/usr/bin:/bin
+
+bail() { echo "FATAL: $1"; exit 1; }
+grep --version > /dev/null 2> /dev/null || bail "grep does not work"
+sed '' /dev/null || bail "sed does not work"
+sort   /dev/null || bail "sort does not work"
+
+ver_check()
+{
+   if ! type -p $2 &amp;>/dev/null
+   then 
+     echo "ERROR: Cannot find $2 ($1)"; return 1; 
+   fi
+   v=$($2 --version 2>&amp;1 | grep -E -o '[0-9]+\.[0-9\.]+' | head -n1)
+   if printf '%s\n' $3 $v | sort --version-sort --check &amp;>/dev/null
+   then 
+     printf "OK:    %-9s %-6s >= $3\n" "$1" "$v"; return 0;
+   else 
+     printf "ERROR: %-9s is TOO OLD ($3 or later required)\n" "$1"; 
+     return 1; 
+   fi
+}
+
+ver_kernel()
+{
+   kver=$(uname -r | sed -E 's/^([0-9\.]+).*/\1/') 
+   if printf '%s\n' $1 $kver | sort --version-sort --check &amp;>/dev/null
+   then 
+     printf "OK:    Linux Kernel $kver >= $1\n"; return 0;
+   else 
+     printf "ERROR: Linux Kernel ($kver) is TOO OLD ($1 or later required)\n" "$kver"; 
+     return 1; 
+   fi
+}
+
+# Coreutils first because-sort needs Coreutils >= 7.0
+ver_check Coreutils      sort     7.0 || bail "--version-sort unsupported"
+ver_check Bash           bash     3.2
+ver_check Binutils       ld       2.13.1
+ver_check Bison          bison    2.7
+ver_check Diffutils      diff     2.8.1
+ver_check Findutils      find     4.2.31
+ver_check Gawk           gawk     4.0.1
+ver_check GCC            gcc      5.1
+ver_check "GCC (C++)"    g++      5.1
+ver_check Grep           grep     2.6.1
+ver_check Gzip           gzip     1.3.12
+ver_check M4             m4       1.4.10
+ver_check Make           make     4.0
+ver_check Patch          patch    2.5.4
+ver_check Perl           perl     5.8.8
+ver_check Python         python3  3.4
+ver_check Sed            sed      4.1.5
+ver_check Tar            tar      1.22
+ver_check Texinfo        texi2any 4.7
+ver_check Xz             xz       5.0.0
+#ver_check "Linux Kernel" "" 3.2 'cat /proc/version' 
+ver_kernel 3.2
+
+alias_check() {
+   if $1 --version 2>&amp;1 | grep -qi $2
+   then printf "OK:    %-4s is $2\n" "$1";
+   else printf "ERROR: %-4s is NOT $2\n" "$1"; fi
+}
+echo "Aliases:"
+alias_check awk GNU
+alias_check yacc Bison
+alias_check sh Bash
+
+echo "Compiler check"
+if printf "int main(){}" | g++ -x c++ -
+then echo "OK:    g++ works";
+else echo "ERROR: g++ does NOT work"; fi
+rm -f a.out</literal>
 EOF
 
 bash version-check.sh</userinput></screen>
-<!--
-  <para>Also check for some library consistency:</para>
-
-<screen role="nodump"><userinput>cat &gt; library-check.sh &lt;&lt; "EOF"
-<literal>#!/bin/bash
-for lib in lib{gmp,mpfr,mpc}.la; do
-  echo $lib: $(if find /usr/lib* -name $lib|
-               grep -q $lib;then :;else echo not;fi) found
-done
-unset lib</literal>
-EOF
-
-bash library-check.sh</userinput></screen>
 
-<para>The files identified by this script should be all present
-or all absent, but not only one or two present.</para>
--->
  </sect2>
 </sect1>