For reference.
---------- Forwarded message ----------
From: Giulio Paci <giuliop...@gmail.com>
Date: Thu, Mar 14, 2013 at 3:04 AM
Subject: Re: f2c and autotools
To: Mathieu Malaterre <ma...@debian.org>
Cc: Debian Mentors List <debian-ment...@lists.debian.org>
Il 13/03/2013 16:01, Mathieu Malaterre ha scritto:
> Hi there,
>
> I am trying to work on #702882
>
> Upstream is basically doing:
>
> if test "$internal_f2c" = "no"; then
> AC_CHECK_LIB([f2c], [f77_alloc_], [],
> AC_CHECK_LIB([f2c], [f77_alloc], [],
> AC_CHECK_LIB([f2c], [F77_ALLOC_], [],
> AC_CHECK_LIB([f2c], [F77_ALLOC], [],
> [AC_MSG_RESULT(not found, trying to use -lf2c anyway.)]))))
> LDFLAGS="${LDFLAGS}"
> else AC_DEFINE([INTERNAL_F2C], [1], [Define to 1 if you use the internal
> F2C library])
> fi
>
>
> As explained in #702882#5, this fails on debian system since one
> cannot link to f2c without first defining a MAIN__ symbol. Has anyone
> work on autotools and f2c issue on debian in the past ? How should one
> use the autotools *F77* macros to handle this case ?
As far as I can see there is no fortran code in the igraph package and
as far as I know all the *F77* *FC* macros are useful only to detect
proper setup for a specific
fortran compiler.
I do not think the check above is properly done. However to make it
pass, you should (see the attached patch):
1) use C compiler in AC_CHECK_LIB (an AC_LANG_POP(C++) was missing)
2) force the AC_CHECK_LIB to create a MAIN__ function instead of main
(the -Dmain=MAIN__ flags is used for that)
3) check for a function that is in libf2c (e.g., f_open)
4) use the -Dmain=MAIN__ flags wherever you are issuing checks that
involves linking libf2c
This however is only part of the problem: you still have to solve the
issue of providing the correct flags/the correct source at compile
time.
I do not know what is the best way to deal with this kind of problems in Debian.
Bests,
Giulio.
--- a/configure.ac
+++ b/configure.ac
@@ -169,7 +169,7 @@
])
])
fi
-AC_LANG_PUSH([C++])
+AC_LANG_POP([C++])
tls_support=no
HAVE_TLS=0
@@ -211,40 +211,57 @@
[internal_glpk=no],
[internal_glpk=yes])
+F2C_CPPFLAGS=""
if test "$internal_f2c" = "no"; then
AC_CHECK_LIB([f2c], [f77_alloc_], [],
AC_CHECK_LIB([f2c], [f77_alloc], [],
AC_CHECK_LIB([f2c], [F77_ALLOC_], [],
AC_CHECK_LIB([f2c], [F77_ALLOC], [],
- [AC_MSG_RESULT(not found, trying to use -lf2c anyway.)]))))
+ [
+
+ CPPFLAGS_TMP="$CPPFLAGS"
+ CPPFLAGS="-Dmain=MAIN__"
+ AC_CHECK_LIB([f2c], [f_open], [],
+ [AC_MSG_RESULT(not found, trying to use -lf2c anyway.)])
+ CPPFLAGS="$CPPFLAGS_TMP"
+ F2C_CPPFLAGS="-Dmain=MAIN__"
+]))))
LDFLAGS="${LDFLAGS}"
else
AC_DEFINE([INTERNAL_F2C], [1], [Define to 1 if you use the internal F2C library])
fi
if test "$internal_blas" = "no"; then
+ CPPFLAGS_TMP="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS $F2C_CPPFLAGS"
AC_CHECK_LIB([blas], [daxpy_], [],
AC_CHECK_LIB([blas], [daxpy], [],
AC_CHECK_LIB([blas], [DAXPY_], [],
AC_CHECK_LIB([blas], [DAXPY], [],
[AC_MSG_RESULT(not found, trying to use -lblas anyway.)]))))
LDFLAGS="${LDFLAGS} -lblas"
+ CPPFLAGS="$CPPFLAGS_TMP"
else
AC_DEFINE([INTERNAL_BLAS], [1], [Define to 1 if you use the internal BLAS library])
fi
if test "$internal_lapack" = "no"; then
+ CPPFLAGS_TMP="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS $F2C_CPPFLAGS"
AC_CHECK_LIB([lapack], [dlarnv_], [],
AC_CHECK_LIB([lapack], [dlarnv], [],
AC_CHECK_LIB([lapack], [DLARNV_], [],
AC_CHECK_LIB([lapack], [DLARNV], [],
[AC_MSG_RESULT(not found, trying to use -llapack anyway.)]))))
LDFLAGS="${LDFLAGS} -llapack"
+ CPPFLAGS="$CPPFLAGS_TMP"
else
AC_DEFINE([INTERNAL_LAPACK], [1], [Define to 1 if you use the internal LAPACK library])
fi
if test "$internal_arpack" = "no"; then
+ CPPFLAGS_TMP="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS $F2C_CPPFLAGS"
if test "$tls_support" = "yes"; then
AC_MSG_ERROR([Thread-local storage only supported with internal ARPACK library])
fi
@@ -254,12 +271,15 @@
AC_CHECK_LIB([arpack], [DSAUPD], [],
[AC_MSG_RESULT(not found, trying to use -larpack anyway.)]))))
LDFLAGS="${LDFLAGS} -larpack"
+ CPPFLAGS="$CPPFLAGS_TMP"
else
AC_DEFINE([INTERNAL_ARPACK], [1], [Define to 1 if you use the internal ARPACK library])
fi
glpk_support=no
if test "$internal_glpk" = "no"; then
+ CPPFLAGS_TMP="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS $F2C_CPPFLAGS"
AC_CHECK_LIB([glpk], [glp_read_mps], [
AC_CHECK_HEADER([glpk.h], [
AC_EGREP_CPP(yes, [
@@ -274,6 +294,7 @@
])
])
])
+ CPPFLAGS="$CPPFLAGS_TMP"
else
AC_DEFINE([HAVE_GLPK], [1], [Define to 1 if you have the GLPK library])
AC_DEFINE([INTERNAL_GLPK], [1], [Define to 1 if you use the internal GLPK library])
