don't presume availability of gmp.pc

This suggests moving the conditional that determines if mini-gmp is used
into scmconfig.h.

* configure.ac: replace PKG_CHECK_MODULES for gmp with AC_LIB_HAVE_LINKFLAGS
    Remove ENABLE_MINI_GMP define.  Also don't run mpz_inits test for
    --enable-mini-gmp.
* libguile/gen-scmconfig.c (main) [ENABLE_MINI_GMP]: replace ENABLE_MINI_GMP
    with SCM_I_GSC_ENABLE_MINI_GMP
* libguile/bytevectors.c [ENABLE_MINI_GMP]: replace ENABLE_MINI_GMP
    with SCM_ENABLE_MINI_GMP
* libguile/init.c [ENABLE_MINI_GMP]: replace ENABLE_MINI_GMP
    with SCM_ENABLE_MINI_GMP
* libguile/numbers.c: include scm.h
    [SCM_ENABLE_MINI_GMP]: provide mpz_inits and mpz_clears
    [ENABLE_MINI_GMP]: prefer SCM_ENABLE_MINI_GMP to ENABLE_MINI_GMP
* libguile/numbers.h: include scm.h
* libguile/random.c [ENABLE_MINI_GMP]: replace ENABLE_MINI_GMP
    with SCM_ENABLE_MINI_GMP
* libguile/socket.c [ENABLE_MINI_GMP]: replace ENABLE_MINI_GMP
    with SCM_ENABLE_MINI_GMP

configure.ac

@@ -647,33 +647,26 @@ AC_CACHE_SAVE
 
 dnl GMP tests
 
-PKG_CHECK_MODULES([GMP],[gmp],
-  [],
-  [$enable_mini_gmp=yes])
-
 SCM_I_GSC_ENABLE_MINI_GMP=0
 AC_ARG_ENABLE(mini-gmp,
   [AS_HELP_STRING([--enable-mini-gmp],
                   [use mini-gmp instead of the full GMP library])])
 
-if test "$enable_mini_gmp" = yes || test "$enable_mini_gmp" = y; then
+if test "x$enable_mini_gmp" = xyes || test "x$enable_mini_gmp" = xy; then
   SCM_I_GSC_ENABLE_MINI_GMP=1
-  AC_DEFINE([ENABLE_MINI_GMP], 1,
-      [Define this if you want to use mini-gmp.])
 else
-  LIBS="$GMP_LIBS $LIBS"
-  CFLAGS="$GMP_CFLAGS $CFLAGS"
+  AC_LIB_HAVE_LINKFLAGS([gmp],[],[#include <gmp.h>], [mpz_import (0,0,0,0,0,0,0);])
+  if test "x$HAVE_LIBGMP" != "xyes"; then
+    AC_MSG_ERROR([GNU MP 4.1 or greater not found])
+  fi
+  if test "x$LIBGMP_PREFIX" != "x"; then
+    CPPFLAGS="-I$LIBGMP_PREFIX $CPPFLAGS"
+  fi
+  AC_CHECK_DECLS([mpz_inits], [], [], [[#include <gmp.h>]])
 fi
 AC_SUBST([SCM_I_GSC_ENABLE_MINI_GMP])
 AM_CONDITIONAL([USE_MINI_GMP], [test "x$enable_mini_gmp" = "xyes"])
 
-AC_CHECK_DECLS([mpz_inits], [], [],
-  [[#if ENABLE_MINI_GMP
-    #include "libguile/mini-gmp.h"
-    #else
-    #include <gmp.h>
-    #endif]])
-
 dnl GNU libunistring is checked for by Gnulib's `libunistring' module.
 if test "x$LTLIBUNISTRING" = "x"; then
   AC_MSG_ERROR([GNU libunistring is required, please install it.])

libguile/bytevectors.c

@@ -35,7 +35,9 @@
 #include <alloca.h>
 #include <assert.h>
 
-#if ENABLE_MINI_GMP
+#include "scm.h"
+
+#if SCM_ENABLE_MINI_GMP
 #include "mini-gmp.h"
 #else
 #include <gmp.h>

libguile/gen-scmconfig.c

@@ -379,7 +379,7 @@ main (int argc, char *argv[])
 
   pf ("\n");
   pf ("/* Define to 1 to use mini GMP.  */\n");
-#ifdef ENABLE_MINI_GMP
+#if SCM_I_GSC_ENABLE_MINI_GMP == 1
   pf ("#define SCM_ENABLE_MINI_GMP 1\n");
 #else
   pf ("#undef SCM_ENABLE_MINI_GMP\n");

libguile/init.c

@@ -31,7 +31,9 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-#if ENABLE_MINI_GMP
+#include "scm.h"
+
+#if SCM_ENABLE_MINI_GMP
 #include "mini-gmp.h"
 #else
 #include <gmp.h>

libguile/numbers.c

@@ -110,9 +110,10 @@ verify (SCM_MOST_POSITIVE_FIXNUM <= (mp_limb_t) -1);
   (SCM_I_FIXNUM_BIT-1 <= DBL_MANT_DIG                                   \
    || ((n) ^ ((n) >> (SCM_I_FIXNUM_BIT-1))) < (1L << DBL_MANT_DIG))
 
-#if ! HAVE_DECL_MPZ_INITS
+#if (! HAVE_DECL_MPZ_INITS) || SCM_ENABLE_MINI_GMP
 
-/* GMP < 5.0.0 lacks `mpz_inits' and `mpz_clears'.  Provide them.  */
+/* GMP < 5.0.0 and mini-gmp lack `mpz_inits' and `mpz_clears'.  Provide
+   them.  */
 
 #define VARARG_MPZ_ITERATOR(func)		\
   static void					\
@@ -399,7 +400,7 @@ scm_i_big2dbl_2exp (SCM b, long *expon_p)
   {
     long expon;
     double signif;
-#if ENABLE_MINI_GMP
+#if SCM_ENABLE_MINI_GMP
     int iexpon;
     signif = mpz_get_d (SCM_I_BIG_MPZ (b));
     signif = frexp (signif, &iexpon);

libguile/numbers.h

@@ -22,16 +22,17 @@
 
 
 
-#include "libguile/scmconfig.h"
-#include "libguile/error.h"
-#include "libguile/gc.h"
-#include "libguile/print.h"
+#include "libguile/scm.h"
 #if SCM_ENABLE_MINI_GMP
 #include "libguile/mini-gmp.h"
 #else
 #include <gmp.h>
 #endif
 
+#include "libguile/error.h"
+#include "libguile/gc.h"
+#include "libguile/print.h"
+
 
 
 /* Immediate Numbers, also known as fixnums

libguile/random.c

@@ -30,17 +30,19 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include "scm.h"
+#if SCM_ENABLE_MINI_GMP
+#include "mini-gmp.h"
+#else
+#include <gmp.h>
+#endif
+
 #include "arrays.h"
 #include "feature.h"
 #include "generalized-arrays.h"
 #include "generalized-vectors.h"
 #include "gsubr.h"
 #include "list.h"
-#if ENABLE_MINI_GMP
-#include "mini-gmp.h"
-#else
-#include <gmp.h>
-#endif
 #include "modules.h"
 #include "numbers.h"
 #include "numbers.h"

libguile/socket.c

@@ -44,7 +44,8 @@
 #include <netdb.h>
 #include <arpa/inet.h>
 
-#if ENABLE_MINI_GMP
+#include "scm.h"
+#if SCM_ENABLE_MINI_GMP
 #include "mini-gmp.h"
 #else
 #include <gmp.h>