Re: [Bug-glpk] glpk-4.12 build failure on GNU/Linux

[Andrew Makhorin]

Thank you for your bug report.

> I got multiple undefined references to math functions
> trying to build glpk-4.12 on GNU/Linux x86, gcc 3.3.4,
> binutils 2.15.92, make 3.80.
> Maybe a missing -lm ?

That is right. There is a bug in configure.in which appears if the
configure script detects the GMP library and due to which -lm is not
included in the option list.

There are two ways to fix the bug.

1. Patch configure.in and then run autoconf/automake.
   Thanks to Davide Madrisan <address@hidden> who
   provided the patch:

--- configure.in.orig   2006-11-09 09:43:01.000000000 +0100
+++ configure.in        2006-11-09 09:43:15.000000000 +0100
@@ -21,7 +21,7 @@
 sed -e 's/#undef GLP_USE_GMP/#define GLP_USE_GMP/' \
        ./include/glpcfg.hin > ./include/glpcfg.h
 rm -f ./include/glpcfg.hin
-LIBS="-lgmp"
+LIBS="-lgmp -lm"
 else
 echo "*** WARNING ***"
 echo "To attain a much better performance on using exact arithmetic"

2. After configuring but before running make replace line 1367:

LIBS="-lgmp"

by the following line:

LIBS="-lgmp -lm"

directly in configure script, not in configure.in. This way can be
used if autoconf/automake are not installed.