* doc/sdccman.lyx: added description of --no-std-crt0 gbz80 command line option

[fw/sdcc] / configure.in

diff --git a/configure.in b/configure.in
index eb39cc15771f0db35891ed6cd282f6414796679b..735fafb17de753f7a845c228645c590eb612850f 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 AC_PREREQ(2.60)
-AC_INIT
+AC_INIT(.version)
 AC_CONFIG_SRCDIR([Makefile.in])
 AC_CONFIG_HEADER(sdccconf.h:sdccconf_in.h)
 
@@ -9,11 +9,14 @@ AC_PROG_AWK
 
 AC_MSG_CHECKING(version of the package)
 if test -f ${srcdir}/.version; then
-  VERSION=`cat ${srcdir}/.version`
+  { read VERSION; } < ${srcdir}/.version
+  AC_MSG_RESULT($VERSION)
 elif test -f ../.version; then
-  VERSION=`cat ../.version`
+  { read VERSION; } < ../.version
+  AC_MSG_RESULT($VERSION)
 else
   VERSION="0.0.0"
+  AC_MSG_RESULT(unknown using 0.0.0)
 fi
 VERSIONHI=`echo $VERSION|$AWK 'BEGIN {FS="."} {print $1}'`
 VERSIONLO=`echo $VERSION|$AWK 'BEGIN {FS="."} {print $2}'`
@@ -383,7 +386,78 @@ AC_DEFINE_UNQUOTED(TYPE_UBYTE,  unsigned $TYPE_CHAR)
 AC_DEFINE_UNQUOTED(TYPE_UWORD,  unsigned $TYPE_WORD)
 AC_DEFINE_UNQUOTED(TYPE_UDWORD, unsigned $TYPE_DWORD)
 
-AC_C_BIGENDIAN
+
+# SDCC_BUILD_BIGENDIAN ([ACTION-IF-TRUE], [ACTION-IF-FALSE], [ACTION-IF-UNKNOWN])
+# -------------------------------------------------------------------------
+AC_DEFUN([SDCC_BUILD_BIGENDIAN],
+[AC_CACHE_CHECK(whether host machine byte ordering is bigendian, sdcc_cv_build_bigendian,
+[# See if sys/param.h defines the BYTE_ORDER macro.
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h>
+#include <sys/param.h>
+],
+[#if  ! (defined BYTE_ORDER && defined BIG_ENDIAN && defined LITTLE_ENDIAN \
+       && BYTE_ORDER && BIG_ENDIAN && LITTLE_ENDIAN)
+ bogus endian macros
+#endif
+])],
+[# It does; now see whether it defined to BIG_ENDIAN or not.
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h>
+#include <sys/param.h>
+], [#if BYTE_ORDER != BIG_ENDIAN
+ not big endian
+#endif
+])], [sdcc_cv_build_bigendian=yes], [sdcc_cv_build_bigendian=no])],
+[# It does not; compile a test program.
+AC_RUN_IFELSE(
+[AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT], [[
+  /* Are we little or big endian?  From Harbison&Steele.  */
+  union
+  {
+    long int l;
+    char c[sizeof (long int)];
+  } u;
+  u.l = 1;
+  return u.c[sizeof (long int) - 1] == 1;
+]])],
+             [sdcc_cv_build_bigendian=no],
+             [sdcc_cv_build_bigendian=yes],
+[# try to guess the endianness by grepping values into an object file
+  sdcc_cv_build_bigendian=unknown
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+[[short int ascii_mm[] = { 0x4249, 0x4765, 0x6E44, 0x6961, 0x6E53, 0x7953, 0 };
+short int ascii_ii[] = { 0x694C, 0x5454, 0x656C, 0x6E45, 0x6944, 0x6E61, 0 };
+void _ascii () { char *s = (char *) ascii_mm; s = (char *) ascii_ii; }
+short int ebcdic_ii[] = { 0x89D3, 0xE3E3, 0x8593, 0x95C5, 0x89C4, 0x9581, 0 };
+short int ebcdic_mm[] = { 0xC2C9, 0xC785, 0x95C4, 0x8981, 0x95E2, 0xA8E2, 0 };
+void _ebcdic () { char *s = (char *) ebcdic_mm; s = (char *) ebcdic_ii; }]],
+[[ _ascii (); _ebcdic (); ]])],
+[if grep BIGenDianSyS conftest.$ac_objext >/dev/null ; then
+  sdcc_cv_build_bigendian=yes
+fi
+if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+  if test "$sdcc_cv_build_bigendian" = unknown; then
+    sdcc_cv_build_bigendian=no
+  else
+    # finding both strings is unlikely to happen, but who knows?
+    sdcc_cv_build_bigendian=unknown
+  fi
+fi])])])])
+case $sdcc_cv_build_bigendian in
+  yes)
+    m4_default([$1],
+      [AC_DEFINE([BUILD_WORDS_BIGENDIAN], 1,
+       [Define to 1 if your processor stores words with the most significant
+        byte first (like Motorola and SPARC, unlike Intel and VAX).])]) ;;
+  no)
+    $2 ;;
+  *)
+    m4_default([$3],
+      [AC_MSG_ERROR([unknown endianness
+presetting sdcc_cv_build_bigendian=no (or yes) will help])]) ;;
+esac
+])# SDCC_BUILD_BIGENDIAN
+
+SDCC_BUILD_BIGENDIAN
 
 # Set standard installation paths
 # ===========================================================================