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1 From: Jakub Jelinek <jakub@redhat.com>

2 Subject: [PATCH] Use --push-state --as-needed and --pop-state instead of --as-needed and --no-as-needed for libgcc

3

4 As discussed, using --as-needed and --no-as-needed is dangerous, because

5 it results in --no-as-needed even for libraries after -lgcc_s, even when the

6 default is --as-needed or --as-needed has been specified earlier on the

7 command line.

8

9 If the linker supports --push-state/--pop-state, we should IMHO use it.

10

11 2018-04-11 Jakub Jelinek <jakub@redhat.com>

12

13 * configure.ac (LD_AS_NEEDED_OPTION, LD_NO_AS_NEEDED_OPTION): Use

14 --push-state --as-needed and --pop-state instead of --as-needed and

15 --no-as-needed if ld supports it.

16 * configure: Regenerated.

17

18 Index: b/gcc/configure.ac

19 ===================================================================

20 --- a/gcc/configure.ac

21 +++ b/gcc/configure.ac

22 @@ -5518,11 +5518,21 @@ if test $in_tree_ld = yes ; then

23 if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \

24 && test $in_tree_ld_is_elf = yes; then

25 gcc_cv_ld_as_needed=yes

26 + if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 28; then

27 + gcc_cv_ld_as_needed_option='--push-state --as-needed'

28 + gcc_cv_ld_no_as_needed_option='--pop-state'

29 + fi

30 fi

31 elif test x$gcc_cv_ld != x; then

32 # Check if linker supports --as-needed and --no-as-needed options

33 if $gcc_cv_ld --help 2>&1 | grep as-needed > /dev/null; then

34 gcc_cv_ld_as_needed=yes

35 + if $gcc_cv_ld --help 2>&1 | grep push-state > /dev/null; then

36 + if $gcc_cv_ld --help 2>&1 | grep pop-state > /dev/null; then

37 + gcc_cv_ld_as_needed_option='--push-state --as-needed'

38 + gcc_cv_ld_no_as_needed_option='--pop-state'

39 + fi

40 + fi

41 fi

42 case "$target:$gnu_ld" in

43 *-*-solaris2*:no)