Port to IRIX 6.5.

This port requires IRIX cc, as I did not have time to get
undump working with the old GCC on the system I had access to,
but that's better than nothing.
* configure.ac (gl_GCC_VERSION_IFELSE): Remove unused macro
that wouldn't have worked anyway, with IRIX cc.
(emacs_cv_clang, emacs_cv_sanitize_address)
(ns_osx_have_104, ns_osx_have_105):
Don't assume '#error' makes the compiler fail,
as this doesn't work with IRIX cc.
(CFLAGS, LIBS): Don't let the GnuTLS results infect later 'configure'
checks.  This runs afoul of an IRIX configuration where GnuTLS is
in an optional library that also contains getdelim, and causes
a later 'configure' to incorrectly think getdelim is supported.
* src/alloc.c (TAGGABLE_NULL): New constant,
for porting to hosts with nontrivial DATA_SEG_BITS settings.
(next_vector, set_next_vector): Use it.
* src/conf_post.h (INET6) [IRIX6_5]: Define.
(HAVE_GETADDRINFO) [IRIX6_5]: Undef.
* src/data.c (BITS_PER_ULL): Don't assume ULLONG_MAX is defined.
* src/lisp.h (lisp_h_XPNTR): Don't OR in bits that aren't masked out,
for consistency with how TAGGABLE_NULL is computed.

Fixes: debbugs:9684

diff --git a/ChangeLog b/ChangeLog
index 69e03a1..f70e461 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2014-04-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+       Port to IRIX 6.5 (Bug#9684).
+       This port requires IRIX cc, as I did not have time to get
+       undump working with the old GCC on the system I had access to,
+       but that's better than nothing.
+       * configure.ac (gl_GCC_VERSION_IFELSE): Remove unused macro
+       that wouldn't have worked anyway, with IRIX cc.
+       (emacs_cv_clang, emacs_cv_sanitize_address)
+       (ns_osx_have_104, ns_osx_have_105):
+       Don't assume '#error' makes the compiler fail,
+       as this doesn't work with IRIX cc.
+       (CFLAGS, LIBS): Don't let the GnuTLS results infect later 'configure'
+       checks.  This runs afoul of an IRIX configuration where GnuTLS is
+       in an optional library that also contains getdelim, and causes
+       a later 'configure' to incorrectly think getdelim is supported.
+
 2014-04-13  Eli Zaretskii  <eliz@gnu.org>
 
        * configure.ac (LN_S_FILEONLY, LN_S): Use "/bin/ln" on MinGW, to

diff --git a/configure.ac b/configure.ac
index 3113fe0..9d69e26 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -779,30 +779,12 @@ if test "${enableval}" != "no"; then
    fi
 fi)
 
-# gl_GCC_VERSION_IFELSE([major], [minor], [run-if-found], [run-if-not-found])
-# ------------------------------------------------
-# If $CPP is gcc-MAJOR.MINOR or newer, then run RUN-IF-FOUND.
-# Otherwise, run RUN-IF-NOT-FOUND.
-AC_DEFUN([gl_GCC_VERSION_IFELSE],
-  [AC_PREPROC_IFELSE(
-    [AC_LANG_PROGRAM(
-      [[
-#if ($1) < __GNUC__ || (($1) == __GNUC__ && ($2) <= __GNUC_MINOR__)
-/* ok */
-#else
-# error "your version of gcc is older than $1.$2"
-#endif
-      ]]),
-    ], [$3], [$4])
-  ]
-)
-
 # clang is unduly picky about some things.
 AC_CACHE_CHECK([whether the compiler is clang], [emacs_cv_clang],
   [AC_COMPILE_IFELSE(
      [AC_LANG_PROGRAM([[
          #ifndef __clang__
-           #error "not clang"
+           error "not clang";
          #endif
         ]])],
      [emacs_cv_clang=yes],
@@ -1114,7 +1096,7 @@ AC_CACHE_CHECK([whether addresses are sanitized],
          #endif
          #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
          #else
-          #error "Addresses are not sanitized."
+          error "Addresses are not sanitized.";
          #endif
        ]])],
      [emacs_cv_sanitize_address=yes],
@@ -1712,7 +1694,7 @@ fail;
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
  ; /* OK */
 #else
-#error "OSX 10.4 or newer required"
+ error "OSX 10.4 or newer required";
 #endif
 #endif
                    ])],
@@ -1730,7 +1712,7 @@ fail;
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
  ; /* OK */
 #else
-#error "OSX 10.5 not found"
+ error "OSX 10.5 not found";
 #endif
 #endif
                    ])],
@@ -2529,9 +2511,6 @@ if test "${with_gnutls}" = "yes" ; then
   # Windows loads GnuTLS dynamically
   if test "${opsys}" = "mingw32"; then
     LIBGNUTLS_LIBS=
-  else
-    CFLAGS="$CFLAGS $LIBGNUTLS_CFLAGS"
-    LIBS="$LIBGNUTLS_LIBS $LIBS"
   fi
 fi
 

diff --git a/src/ChangeLog b/src/ChangeLog
index d885863..be4ce13 100644 (file)
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,15 @@
+2014-04-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+       Port to IRIX 6.5 (Bug#9684).
+       * alloc.c (TAGGABLE_NULL): New constant,
+       for porting to hosts with nontrivial DATA_SEG_BITS settings.
+       (next_vector, set_next_vector): Use it.
+       * conf_post.h (INET6) [IRIX6_5]: Define.
+       (HAVE_GETADDRINFO) [IRIX6_5]: Undef.
+       * data.c (BITS_PER_ULL): Don't assume ULLONG_MAX is defined.
+       * lisp.h (lisp_h_XPNTR): Don't OR in bits that aren't masked out,
+       for consistency with how TAGGABLE_NULL is computed.
+
 2014-04-13  Eli Zaretskii  <eliz@gnu.org>
 
        * keyboard.c (Fopen_dribble_file): Encode the dribble file-name

diff --git a/src/alloc.c b/src/alloc.c
index d4e24b6..ccb955a 100644 (file)
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -2647,18 +2647,24 @@ DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0,
  ***********************************************************************/
 
 /* Sometimes a vector's contents are merely a pointer internally used
-   in vector allocation code.  Usually you don't want to touch this.  */
+   in vector allocation code.  On the rare platforms where a null
+   pointer cannot be tagged, represent it with a Lisp 0.
+   Usually you don't want to touch this.  */
+
+enum { TAGGABLE_NULL = (DATA_SEG_BITS & ~VALMASK) == 0 };
 
 static struct Lisp_Vector *
 next_vector (struct Lisp_Vector *v)
 {
+  if (! TAGGABLE_NULL && EQ (v->contents[0], make_number (0)))
+    return 0;
   return XUNTAG (v->contents[0], 0);
 }
 
 static void
 set_next_vector (struct Lisp_Vector *v, struct Lisp_Vector *p)
 {
-  v->contents[0] = make_lisp_ptr (p, 0);
+  v->contents[0] = TAGGABLE_NULL || p ? make_lisp_ptr (p, 0) : make_number (0);
 }
 
 /* This value is balanced well enough to avoid too much internal overhead

diff --git a/src/conf_post.h b/src/conf_post.h
index 80d5610..bb3be1b 100644 (file)
--- a/src/conf_post.h
+++ b/src/conf_post.h
@@ -99,7 +99,8 @@ typedef bool bool_bf;
 #ifdef emacs
 char *_getpty();
 #endif
-
+#define INET6 /* Needed for struct sockaddr_in6.  */
+#undef HAVE_GETADDRINFO /* IRIX has getaddrinfo but not struct addrinfo.  */
 #endif /* IRIX6_5 */
 
 #ifdef MSDOS

diff --git a/src/data.c b/src/data.c
index 4ef81f2..33dd619 100644 (file)
--- a/src/data.c
+++ b/src/data.c
@@ -2982,7 +2982,7 @@ bool_vector_spare_mask (EMACS_INT nr_bits)
 /* Info about unsigned long long, falling back on unsigned long
    if unsigned long long is not available.  */
 
-#if HAVE_UNSIGNED_LONG_LONG_INT
+#if HAVE_UNSIGNED_LONG_LONG_INT && defined ULLONG_MAX
 enum { BITS_PER_ULL = CHAR_BIT * sizeof (unsigned long long) };
 # define ULL_MAX ULLONG_MAX
 #else

diff --git a/src/lisp.h b/src/lisp.h
index ea294f8..6232c32 100644 (file)
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -344,7 +344,7 @@ enum enum_USE_LSB_TAG { USE_LSB_TAG = false };
    (eassert (CONSP (a)), (struct Lisp_Cons *) XUNTAG (a, Lisp_Cons))
 #define lisp_h_XHASH(a) XUINT (a)
 #define lisp_h_XPNTR(a) \
-   ((void *) (intptr_t) ((XLI (a) & VALMASK) | DATA_SEG_BITS))
+   ((void *) (intptr_t) ((XLI (a) & VALMASK) | (DATA_SEG_BITS & ~VALMASK)))
 #define lisp_h_XSYMBOL(a) \
    (eassert (SYMBOLP (a)), (struct Lisp_Symbol *) XUNTAG (a, Lisp_Symbol))
 #ifndef GC_CHECK_CONS_LIST