/[classpath]/classpath/m4/acinclude.m4
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revision 1.6 by tromey, Sat Aug 27 20:12:55 2005 UTC revision 1.7 by mark, Sun Sep 11 23:20:18 2005 UTC
# Line 63  AC_DEFUN([CLASSPATH_CHECK_GCJ], Line 63  AC_DEFUN([CLASSPATH_CHECK_GCJ],
63    else    else
64      AC_PATH_PROG(GCJ, "gcj")      AC_PATH_PROG(GCJ, "gcj")
65    fi      fi  
66      dnl Test the given GCJ, but use it as C (!) compiler to check version
67    if test "x$GCJ" != x; then    if test "x$GCJ" != x; then
68      ## GCC version 2 puts out version messages that looked like:      AC_MSG_CHECKING([gcj version 4.0])
69      ##   2.95      AC_LANG_PUSH([C])
70        AC_LANG_CONFTEST(
71      ## GCC version 3 puts out version messages like:      [[#if __GNUC__ <= 3
72      ##   gcj (GCC) 3.3.3      #error GCJ 4.0.0 or higher is required
73      ##   Copyright (C) 2003 Free Software Foundation, Inc.      #endif
74      ##   This is free software; see the source for copying conditions.  There is NO      ]])
75      ##   warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.      $GCJ -E conftest.c > /dev/null
76      AC_MSG_CHECKING(gcj version)      gcj_4_result=$?
77      ## Take the output from gcj --version and extract just the version number      if test "x$gcj_4_result" = "x0"; then
78      ## into GCJ_VERSION.        AC_MSG_RESULT([4.0 or higher found])
     ## (we need to do this to be compatible with both GCC 2 and GCC 3 version  
     ##  numbers)  
     ##  
     ## First, we get rid of everything before the first number on that line.  
     ## Assume that the first number on that line is the start of the  
     ## version.  
     ##  
     ## Second, while we're at it, go ahead and get rid of the first character  
     ## that is not part of a version number (i.e., is neither a digit nor  
     ## a dot).  
     ##  
     ## Third, quit, so that we won't process the second and subsequent lines.  
     GCJ_VERSION=`$GCJ --version | sed -e 's/^@<:@^0-9@:>@*//' -e 's/@<:@^.0-9@:>@@<:@^.0-9@:>@*//' -e 'q'`  
     GCJ_VERSION_MAJOR=`echo "$GCJ_VERSION" | cut -d '.' -f 1`  
     GCJ_VERSION_MINOR=`echo "$GCJ_VERSION" | cut -d '.' -f 2`  
   
     if expr "$GCJ_VERSION_MAJOR" \< 3 > /dev/null; then  
       GCJ=""  
     fi  
     if expr "$GCJ_VERSION_MAJOR" = 3 > /dev/null; then  
       if expr "$GCJ_VERSION_MINOR" \< 3; then  
         GCJ=""  
       fi  
     fi  
     if test "x$GCJ" != x; then  
       AC_MSG_RESULT($GCJ_VERSION)  
79      else      else
80        AC_MSG_WARN($GCJ_VERSION: gcj 3.3 or higher required)        AC_MSG_WARN([4.0 or higher required])
81      fi      fi
82        AC_LANG_POP
83    fi    fi
84  ])  ])
85    

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