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llvm-6502/autoconf/m4/link_use_r.m4
Reid Spencer 1ac1d4049e Cache the value of this test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18231 91177308-0d34-0410-b5e6-96231b3b80d8
2004-11-25 04:44:46 +00:00

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#
# Determine if the system can handle the -R option being passed to the linker.
#
# This macro is specific to LLVM.
#
AC_DEFUN([AC_LINK_USE_R],
[AC_CACHE_CHECK([for compiler -Wl,-R<path> option],[llvm_cv_link_use_r],
[ AC_LANG_PUSH([C])
oldcflags="$CFLAGS"
CFLAGS="$CFLAGS -Wl,-R."
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
[llvm_cv_link_use_r=yes],[llvm_cv_link_use_r=no])
CFLAGS="$oldcflags"
AC_LANG_POP([C])
])
if test "$llvm_cv_link_use_r" = yes ; then
AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
fi
])