Better support of LLP64 systems with gcc (and clang).

* builds/unix/configure.raw: Call `AC_TYPE_LONG_LONG_INT'.

* builds/unix/ftconfig.in (FT_LONG64): Enable for LLP64 systems (and
suppress warnings) even without `FT_CONFIG_OPTION_FORCE_INT64'.

ChangeLog

@@ -1,3 +1,12 @@
+2016-11-17  Werner Lemberg  <wl@gnu.org>
+
+	Better support of LLP64 systems with gcc (and clang).
+
+	* builds/unix/configure.raw: Call `AC_TYPE_LONG_LONG_INT'.
+
+	* builds/unix/ftconfig.in (FT_LONG64): Enable for LLP64 systems (and
+	suppress warnings) even without `FT_CONFIG_OPTION_FORCE_INT64'.
+
 2016-11-10  Werner Lemberg  <wl@gnu.org>
 
 	Fix `lcd_weights' array size.

builds/unix/configure.raw

@@ -105,6 +105,7 @@ AC_CHECK_HEADERS([fcntl.h unistd.h])
 AC_C_CONST
 AC_CHECK_SIZEOF([int])
 AC_CHECK_SIZEOF([long])
+AC_TYPE_LONG_LONG_INT
 
 
 # check whether cpp computation of size of int and long in ftconfig.in works

builds/unix/ftconfig.in

@@ -287,8 +287,8 @@ FT_BEGIN_HEADER
 #endif
 
 
-  /* determine whether we have a 64-bit int type for platforms without */
-  /* Autoconf                                                          */
+  /* determine whether we have a 64-bit int type  */
+  /* (mostly for environments without `autoconf') */
 #if FT_SIZEOF_LONG == 8
 
   /* FT_LONG64 must be defined if a 64-bit type is available */
@@ -296,6 +296,16 @@ FT_BEGIN_HEADER
 #define FT_INT64   long
 #define FT_UINT64  unsigned long
 
+  /* we handle the LLP64 scheme separately for GCC and clang, */
+  /* suppressing the `long long' warning                      */
+#elif ( FT_SIZEOF_LONG == 4 )       && \
+      defined( HAVE_LONG_LONG_INT ) && \
+      defined( __GNUC__ )
+#pragma GCC diagnostic ignored "-Wlong-long"
+#define FT_LONG64
+#define FT_INT64   long long int
+#define FT_UINT64  unsigned long long int
+
   /*************************************************************************/
   /*                                                                       */
   /* A 64-bit data type may create compilation problems if you compile     */