[fi]
])
+AC_DEFUN([grub_CHECK_LINK_PIE],[
+[# Position independent executable.
+link_nopie_needed=no]
+AC_MSG_CHECKING([whether linker needs disabling of PIE to work])
+AC_LANG_CONFTEST([AC_LANG_SOURCE([[]])])
+
+[if eval "$ac_compile -Wl,-r,-d -nostdlib -Werror -o conftest.o" 2> /dev/null; then]
+ AC_MSG_RESULT([no])
+ [# Should we clear up other files as well, having called `AC_LANG_CONFTEST'?
+ rm -f conftest.o
+else
+ link_nopie_needed=yes]
+ AC_MSG_RESULT([yes])
+[fi]
+])
+
+
dnl Check if the Linker supports `-no-pie'.
AC_DEFUN([grub_CHECK_NO_PIE],
[AC_MSG_CHECKING([whether linker accepts -no-pie])
AC_CACHE_VAL(grub_cv_cc_ld_no_pie,
[save_LDFLAGS="$LDFLAGS"
-LDFLAGS="$LDFLAGS -no-pie"
+LDFLAGS="$LDFLAGS -no-pie -nostdlib -Werror"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
[grub_cv_cc_ld_no_pie=yes],
[grub_cv_cc_ld_no_pie=no])
fi
])
+AC_DEFUN([grub_CHECK_NO_PIE_ONEWORD],
+[AC_MSG_CHECKING([whether linker accepts -nopie])
+AC_CACHE_VAL(grub_cv_cc_ld_no_pie_oneword,
+[save_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -nopie -nostdlib -Werror"
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
+ [grub_cv_cc_ld_no_pie_oneword=yes],
+ [grub_cv_cc_ld_no_pie_oneword=no])
+LDFLAGS="$save_LDFLAGS"
+])
+AC_MSG_RESULT([$grub_cv_cc_ld_no_pie_oneword])
+nopie_oneword_possible=no
+if test "x$grub_cv_cc_ld_no_pie_oneword" = xyes ; then
+ nopie_oneword_possible=yes
+fi
+])
+
dnl Check if the C compiler supports `-fPIC'.
AC_DEFUN([grub_CHECK_PIC],[
[# Position independent executable.
# Position independent executable.
grub_CHECK_PIE
grub_CHECK_NO_PIE
+grub_CHECK_NO_PIE_ONEWORD
+grub_CHECK_LINK_PIE
[# Need that, because some distributions ship compilers that include
# `-fPIE' or '-fpie' and '-pie' in the default specs.
if [ x"$pie_possible" = xyes ]; then
TARGET_CFLAGS="$TARGET_CFLAGS -fno-PIE -fno-pie"
fi
-if [ x"$nopie_possible" = xyes ] && [ x"$pie_possible" = xyes ]; then
- TARGET_LDFLAGS="$TARGET_LDFLAGS -no-pie"
+
+if [ x"$link_nopie_needed" = xyes ] || [ x"$pie_possible" = xyes ]; then
+ if [ x"$nopie_possible" = xyes ]; then
+ TARGET_LDFLAGS="$TARGET_LDFLAGS -no-pie"
+ fi
+ if [ x"$nopie_oneword_possible" = xyes ]; then
+ TARGET_LDFLAGS="$TARGET_LDFLAGS -nopie"
+ fi
fi]
CFLAGS="$TARGET_CFLAGS"