Preliminary support for cross-compilation.

Setting BUILD=, or HOST=, or TARGET= will pass --build=, ... to the
configure process.

If cross compiling you need to set

ENDIAN - either big or little
SIZEOF_LONG_INT
SIZEOF_INT
SIZEOF_SHORT_INT
SIZEOF_LONG_DOUBLE
SIZEOF_DOUBLE
SIZEOF_SHORT
SIZEOF_POINTER

otherwise you'll get an error.

You may also set

NULL_DEVICE

to tell it the location of the null device.  If you don't set this you'll
just get a warning, and it will default to /dev/null.

This is weakly tested, as I am limited in what I can cross compile for.


Fixed semantics for DEBUG to be as in previous commit, except DEBUG=DEFINES
define CCTK_DEBUG and not DEBUG in the header files.

Partially dealt with PR  340 -- -g -O2 no longer automatically appear as
the compilation flags.

Tom


git-svn-id: http://svn.cactuscode.org/flesh/trunk@1652 17b73243-c579-4c4c-a9d2-2d5706c11dac

1 files changed, 29 insertions, 0 deletions

diff --git a/lib/make/aclocal.m4 b/lib/make/aclocal.m4
index 82f2b805..8e03db08 100644
--- a/lib/make/aclocal.m4
+++ b/lib/make/aclocal.m4
@@ -147,3 +147,32 @@ fi
 fi
 )dnl
 
+AC_DEFUN(CCTK_PROG_CC_WORKS,
+[AC_MSG_CHECKING([whether the C compiler ($CC $CFLAGS $LDFLAGS) works])
+AC_LANG_SAVE
+AC_LANG_C
+AC_TRY_COMPILER([main(){return(0);} PilotMain(){return(0);}], ac_cv_prog_cc_works, ac_cv_prog_cc_cross)
+AC_LANG_RESTORE
+AC_MSG_RESULT($ac_cv_prog_cc_works)
+if test $ac_cv_prog_cc_works = no; then
+  AC_MSG_ERROR([installation or configuration problem: C compiler cannot create executables.])
+fi
+AC_MSG_CHECKING([whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler])
+AC_MSG_RESULT($ac_cv_prog_cc_cross)
+cross_compiling=$ac_cv_prog_cc_cross
+])
+
+AC_DEFUN(CCTK_PROG_CXX_WORKS,
+[AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $LDFLAGS) works])
+AC_LANG_SAVE
+AC_LANG_CPLUSPLUS
+AC_TRY_COMPILER([int main(){return(0);} extern "C" int PilotMain(){return(0);}], ac_cv_prog_cxx_works, ac_cv_prog_cxx_cross)
+AC_LANG_RESTORE
+AC_MSG_RESULT($ac_cv_prog_cxx_works)
+if test $ac_cv_prog_cxx_works = no; then
+  AC_MSG_ERROR([installation or configuration problem: C++ compiler cannot create executables.])
+fi
+AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $LDFLAGS) is a cross-compiler])
+AC_MSG_RESULT($ac_cv_prog_cxx_cross)
+cross_compiling=$ac_cv_prog_cxx_cross
+])