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e05f609b61
use of that option with it. This eliminates an imprecise "Linux" test, and should help support old versions of gold. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101560 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
2.6 KiB
Plaintext
85 lines
2.6 KiB
Plaintext
#
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# Determine if the system can handle the -R option being passed to the linker.
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#
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# This macro is specific to LLVM.
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#
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AC_DEFUN([AC_LINK_USE_R],
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[AC_CACHE_CHECK([for compiler -Wl,-R<path> option],[llvm_cv_link_use_r],
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[ AC_LANG_PUSH([C])
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oldcflags="$CFLAGS"
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CFLAGS="$CFLAGS -Wl,-R."
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
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[llvm_cv_link_use_r=yes],[llvm_cv_link_use_r=no])
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CFLAGS="$oldcflags"
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AC_LANG_POP([C])
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])
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if test "$llvm_cv_link_use_r" = yes ; then
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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.])
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fi
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])
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#
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# Determine if the system can handle the -R option being passed to the linker.
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#
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# This macro is specific to LLVM.
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#
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AC_DEFUN([AC_LINK_EXPORT_DYNAMIC],
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[AC_CACHE_CHECK([for compiler -Wl,-export-dynamic option],
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[llvm_cv_link_use_export_dynamic],
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[ AC_LANG_PUSH([C])
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oldcflags="$CFLAGS"
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CFLAGS="$CFLAGS -Wl,-export-dynamic"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
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[llvm_cv_link_use_export_dynamic=yes],[llvm_cv_link_use_export_dynamic=no])
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CFLAGS="$oldcflags"
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AC_LANG_POP([C])
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])
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if test "$llvm_cv_link_use_export_dynamic" = yes ; then
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AC_DEFINE([HAVE_LINK_EXPORT_DYNAMIC],[1],[Define if you can use -Wl,-export-dynamic.])
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fi
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])
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#
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# Determine if the system can handle the -retain-symbols-file option being
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# passed to the linker.
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#
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# This macro is specific to LLVM.
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#
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AC_DEFUN([AC_LINK_RETAIN_SYMBOLS_FILE],
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[AC_CACHE_CHECK([for compiler -Wl,-retain-symbols-file option],
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[llvm_cv_link_use_retain_symbols_file],
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[ AC_LANG_PUSH([C])
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oldcflags="$CFLAGS"
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# The following code is from the autoconf manual,
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# "11.13: Limitations of Usual Tools".
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# Create a temporary directory $tmp in $TMPDIR (default /tmp).
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# Use mktemp if possible; otherwise fall back on mkdir,
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# with $RANDOM to make collisions less likely.
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: ${TMPDIR=/tmp}
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{
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tmp=`
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(umask 077 && mktemp -d "$TMPDIR/fooXXXXXX") 2>/dev/null
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` &&
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test -n "$tmp" && test -d "$tmp"
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} || {
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tmp=$TMPDIR/foo$$-$RANDOM
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(umask 077 && mkdir "$tmp")
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} || exit $?
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echo "main" > "$tmp/exports"
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CFLAGS="$CFLAGS -Wl,-retain-symbols-file=$tmp/exports"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
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[llvm_cv_link_use_retain_symbols_file=yes],[llvm_cv_link_use_retain_symbols_file=no])
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rm "$tmp/exports"
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rmdir "$tmp"
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CFLAGS="$oldcflags"
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AC_LANG_POP([C])
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])
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if test "$llvm_cv_link_use_retain_symbols_file" = yes ; then
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AC_SUBST(HAVE_LINK_RETAIN_SYMBOLS_FILE,1)
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fi
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])
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