2004-04-03 21:22:55 +00:00
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dnl $Id: have-pragma-weak.m4,v 1.3.34.1 2004/04/01 07:27:33 joda Exp $
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2000-01-09 20:58:00 +00:00
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dnl
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2004-04-03 21:22:55 +00:00
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AC_DEFUN([AC_HAVE_PRAGMA_WEAK], [
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2000-01-09 20:58:00 +00:00
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if test "${enable_shared}" = "yes"; then
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AC_MSG_CHECKING(for pragma weak)
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AC_CACHE_VAL(ac_have_pragma_weak, [
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ac_have_pragma_weak=no
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cat > conftest_foo.$ac_ext <<'EOF'
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[#]line __oline__ "configure"
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#include "confdefs.h"
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#pragma weak foo = _foo
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int _foo = 17;
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EOF
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cat > conftest_bar.$ac_ext <<'EOF'
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[#]line __oline__ "configure"
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#include "confdefs.h"
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extern int foo;
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int t() {
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return foo;
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}
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int main() {
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return t();
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}
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EOF
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if AC_TRY_EVAL('CC -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest_foo.$ac_ext conftest_bar.$ac_ext 1>&AC_FD_CC'); then
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ac_have_pragma_weak=yes
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fi
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rm -rf conftest*
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])
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if test "$ac_have_pragma_weak" = "yes"; then
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AC_DEFINE(HAVE_PRAGMA_WEAK, 1, [Define this if your compiler supports \`#pragma weak.'])dnl
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fi
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AC_MSG_RESULT($ac_have_pragma_weak)
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fi
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])
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