[gs-code-review] Fix compilation on 64-bit UNIX platforms.

[Alex Cherepanov]

Current Ghostscript assumes that all marked stdio FILE calls are
available when fopen64() is available. In fact, availability of
every call varies between different platforms independently. So
we have to check for every call separately.

BTW, fdopen64() is especially rare and most often mentioned on the
net in connection with Ghostscript build problems.
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Index: gs/src/gp_unifs.c
===================================================================
--- gs/src/gp_unifs.c	(revision 8204)
+++ gs/src/gp_unifs.c	(working copy)
@@ -88,19 +88,27 @@
 
 	/* save the old filename template in case mkstemp fails */
 	memcpy(ofname, fname, gp_file_name_sizeof);
-#if defined(HAVE_FILE64) && !defined(_LARGEFILE64_SOURCE)
-	if (b64)
-	    file = mkstemp64(fname);
-	else
+#ifdef HAVE_MKSTEMP64
+	file = (b64 ? mkstemp64 : mkstemp)(fname);
+#else
+        file = mkstemp(fname);
 #endif
-	    file = mkstemp(fname);
-
-	/* Fixme : what to do with b64 and 32-bit mkstemp? Unimplemented. */
 	if (file < -1) {
 	    eprintf1("**** Could not open temporary file %s\n", ofname);
 	    return NULL;
 	}
+#if defined(O_LARGEFILE) && defined(__hpux)
+        if (b64)
+            fcntl(file, F_SETFD, fcntl(file, F_GETFD) | O_LARGEFILE);
+#else
+	/* Fixme : what to do with b64 and 32-bit mkstemp? Unimplemented. */
+#endif
+
+#ifdef HAVE_FDOPEN64
+        fp = (b64 ? fdopen64 : fdopen)(file, mode);
+#else
 	fp = fdopen(file, mode);
+#endif
 	if (fp == NULL)
 	    close(file);
     }
Index: gs/src/Makefile.in
===================================================================
--- gs/src/Makefile.in	(revision 8204)
+++ gs/src/Makefile.in	(working copy)
@@ -120,8 +120,14 @@
 #
 # -DHAVE_FILE64
 #	use marked versions of the stdio FILE calls, fopen64() et al.
+#
+# -DHAVE_FDOPEN64
+#	use non-standard function fdopen64()
+#
+# -DHAVE_MKSTEMP64
+#	use non-standard function mkstemp64()
 
-CAPOPT= @HAVE_MKSTEMP@ @HAVE_HYPOT@ @HAVE_FILE64@ @HAVE_FONTCONFIG@
+CAPOPT= @HAVE_MKSTEMP@ @HAVE_HYPOT@ @HAVE_FILE64@ @HAVE_FDOPEN64@ @HAVE_MKSTEMP64@ @HAVE_FONTCONFIG@
 
 # Define the name of the executable file.
 
Index: gs/src/configure.ac
===================================================================
--- gs/src/configure.ac	(revision 8204)
+++ gs/src/configure.ac	(working copy)
@@ -924,6 +924,12 @@
 AC_CHECK_FUNCS([fopen64], [HAVE_FILE64=-DHAVE_FILE64])
 AC_SUBST(HAVE_FILE64)
 
+AC_CHECK_FUNCS([fdopen64], [HAVE_FDOPEN64=-DHAVE_FDOPEN64])
+AC_SUBST(HAVE_FDOPEN64)
+
+AC_CHECK_FUNCS([mkstemp64], [HAVE_MKSTEMP64=-DHAVE_MKSTEMP64])
+AC_SUBST(HAVE_MKSTEMP64)
+
 AC_PROG_GCC_TRADITIONAL
 
 dnl NB: We don't actually provide autoconf-switched fallbacks for any
Index: gs/src/gpmisc.c
===================================================================
--- gs/src/gpmisc.c	(revision 8204)
+++ gs/src/gpmisc.c	(working copy)
@@ -93,7 +93,7 @@
      * fdopen as (char *), rather than following the POSIX.1 standard,
      * which defines it as (const char *).  Patch this here.
      */
-#if defined (O_LARGEFILE)
+#if defined (HAVE_FDOPEN64)
     file = (b64 ? fdopen64 : fdopen)(fildes, (char *)mode); /* still really const */
 #else
     file = fdopen(fildes, (char *)mode); /* still really const */