diff options
| author | Vladimir Serbinenko <phcoder@gmail.com> | 2017-01-30 14:38:50 +0100 |
|---|---|---|
| committer | Vladimir Serbinenko <phcoder@gmail.com> | 2017-01-30 19:38:55 +0100 |
| commit | b53f595b3ed989335d7cd1618a5502270cdb26de (patch) | |
| tree | d13c66011f3f6aed72751e612fbf151e5593df72 /acinclude.m4 | |
| parent | 6371e9c10433578bb236a8284ddb9ce9e201eb59 (diff) | |
Fix -nopie/-nopie check.
We don't use lgcc_s but missing lgcc_s or another library cause test to fail.
So use -nostdlib.
We need to use -Werror to avoid warning-generated case to be accepted.
Clang uses -nopie rather than -no-pie. Check both and use whichever one works.
Additionally android clang passes -pie to the linker even though it doesn't
define __PIE__. So if compilation without no-pie logic fails add -nopie/-no-pie
even if __PIE__ is not defined.
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 7884c1bb5..78cdf6e1d 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -390,12 +390,29 @@ else [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]) @@ -408,6 +425,23 @@ if test "x$grub_cv_cc_ld_no_pie" = xyes ; then fi ]) +AC_DEFUN([grub_CHECK_NO_PIE_ONEWORD], +[AC_MSG_CHECKING([whether linker accepts -nopie]) +AC_CACHE_VAL(grub_cv_cc_ld_no_pie_oneword, +[save_LDFLAGS="$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. |