[complib:mpfr] Fix building MPFR in some weird cases

The tmul test uses a compiled-in input file in $(srcdir).
The problem is that the Makefile passes it unquoted. The C code
tries to stringify it using clever macros, which may *usually* work.

In my case the source directory was named:
.../toolchain-powerpc-e500v2-linux-gnuspe-1.0-2.fc10/.../tests
And guess what? During testing I found out the program fails because
it tries to open:
.../toolchain-powerpc-e500v2-1-gnuspe-1.0-2.fc10/.../tests

Yes, CPP tokenized the macro before stringifying it and not surprisingly
the 'linux' part was converted to 1.
[on Fedora-10: cpp (GCC) 4.3.2 20081105 (Red Hat 4.3.2-7)]

So the attached patch simplify the macros and pass the path as string
from the Makefile.

Manually backported from 1449:8ad2773e7ae3

patches/mpfr/2.4.1/150-test-tmul.patch

@@ -0,0 +1,41 @@
+diff -up ./tests/Makefile.am.orig ./tests/Makefile.am
+--- ./tests/Makefile.am.orig	2009-07-28 16:28:55.377059021 +0300
++++ ./tests/Makefile.am	2009-07-28 16:31:01.136810734 +0300
+@@ -20,7 +20,7 @@ check_PROGRAMS = tversion tinternals tin
+ 
+ EXTRA_DIST = tgeneric.c tgeneric_ui.c mpf_compat.h inp_str.data tmul.dat
+ 
+-tmul_CPPFLAGS = -DMPFR_SRCDIR=$(srcdir)
++tmul_CPPFLAGS = -DMPFR_SRCDIR=\"$(srcdir)\"
+ 
+ LDADD = libfrtests.la $(MPFR_LIBM) $(top_builddir)/libmpfr.la
+ INCLUDES = -I$(top_srcdir) -I$(top_builddir)
+diff -up ./tests/tmul.c.orig ./tests/tmul.c
+--- ./tests/tmul.c.orig	2009-07-28 16:29:03.761058919 +0300
++++ ./tests/tmul.c	2009-07-28 16:30:46.369812215 +0300
+@@ -26,10 +26,8 @@ MA 02110-1301, USA. */
+ #include "mpfr-test.h"
+ 
+ #ifndef MPFR_SRCDIR
+-#define MPFR_SRCDIR .
++#define MPFR_SRCDIR "."
+ #endif
+-#define QUOTE(X) NAME(X)
+-#define NAME(X) #X
+ 
+ #ifdef CHECK_EXTERNAL
+ static int
+@@ -482,10 +480,10 @@ check_regression (void)
+   mpfr_inits2 (6177, x, y, z, (mpfr_ptr) 0);
+   /* we read long strings from a file since ISO C90 does not support strings of
+      length > 509 */
+-  fp = fopen (QUOTE (MPFR_SRCDIR)"/tmul.dat", "r");
++  fp = fopen (MPFR_SRCDIR "/tmul.dat", "r");
+   if (fp == NULL)
+     {
+-      fprintf (stderr, "Error, cannot open "QUOTE (MPFR_SRCDIR)"/tmul.dat\n");
++      fprintf (stderr, "Error, cannot open " MPFR_SRCDIR "/tmul.dat\n");
+       exit (1);
+     }
+   get_string (s, fp);
+

scripts/build/mpfr.sh

@@ -30,6 +30,15 @@ do_mpfr_extract() {
     # do that in the future...
     # It seems that MPFR >= 2.4.0 do not need this...
     case "${CT_MPFR_VERSION}" in
+        2.4.1)
+            CT_Pushd "${CT_SRC_DIR}/mpfr-${CT_MPFR_VERSION}"
+            if [ ! -f .autoreconf.ct-ng ]; then
+                CT_DoLog DEBUG "Running autoreconf"
+                CT_DoExecLog ALL autoreconf
+                touch .autoreconf.ct-ng
+            fi
+            CT_Popd
+            ;;
         1.*|2.0.*|2.1.*|2.2.*|2.3.*)
             CT_Pushd "${CT_SRC_DIR}/mpfr-${CT_MPFR_VERSION}"
             if [ ! -f .autotools.ct-ng ]; then