Make fc-arch stuff cross-compiling-safe

[fontconfig.git] / src / fcarch.h

diff --git a/src/fcarch.h b/src/fcarch.h
new file mode 100644 (file)
index 0000000..0c8cd05
--- /dev/null
+++ b/src/fcarch.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright © 2006 Keith Packard
+ * Copyright © 2010 Behdad Esfahbod
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the author(s) not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  The authors make no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifndef _FCARCH_H_
+#define _FCARCH_H_
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+/*
+ * Each unique machine architecture needs an entry in this file
+ * So far the differences boil down to: endianness, 32 vs 64 bit pointers,
+ * and on 32bit ones, whether double is aligned to one word or two words.
+ * Those result in the 6 formats listed below.
+ *
+ * If any of the assertion errors in fccache.c fail, you need to add a new
+ * architecture.  Contact the fontconfig mailing list in that case.
+ *
+ * name                endianness      pointer-size    double-alignment
+ *
+ * le32d4      4321            4               4
+ * le32d8      4321            4               8
+ * le64                4321            8               8
+ * be32d4      1234            4               4
+ * be32d8      1234            4               8
+ * be64                1234            8               8
+ */
+
+#if defined(WORDS_BIGENDIAN) && WORDS_BIGENDIAN
+# define FC_ARCH_ENDIAN "be"
+#else /* !WORDS_BIGENDIAN */
+# define FC_ARCH_ENDIAN "le"
+#endif
+
+#if SIZEOF_VOID_P == 4
+# if ALIGNOF_DOUBLE == 4
+#  define FC_ARCH_SIZE_ALIGN "32d4"
+# else /* ALIGNOF_DOUBLE != 4 */
+#  define FC_ARCH_SIZE_ALIGN "32d8"
+# endif
+#else /* SIZEOF_VOID_P != 4 */
+# define FC_ARCH_SIZE_ALIGN "64"
+#endif
+
+#ifdef ARCHITECTURE
+# define ARCHITECTURE FC_ARCHITECTURE
+#else
+# define FC_ARCHITECTURE FC_ARCH_ENDIAN FC_ARCH_SIZE_ALIGN
+#endif
+
+#endif /* _FCARCH_H_ */