configure: Allow LD to be LLD 13.0.0 or above [BZ #26558]
When using LLD (LLVM linker) as the linker, configure prints a confusing
message.
*** These critical programs are missing or too old: GNU ld
LLD>=13.0.0 can build glibc --enable-static-pie. (8.0.0 needs one
workaround for -Wl,-defsym=_begin=0. 9.0.0 works with
--disable-static-pie).
XFAIL two tests sysdeps/x86/tst-ifunc-isa-* which have the BZ #28154
issue (LLD follows the PowerPC port of GNU ld for ifunc by placing
IRELATIVE relocations in .rela.dyn, triggering a glibc ifunc fragility).
The set of dynamic symbols is the same with GNU ld and LLD,
modulo unused SHN_ABS version node symbols.
For comparison, gold does not support --enable-static-pie
yet (--no-dynamic-linker is unsupported BZ #22221), yet
has 6 failures more than LLD. gold linked libc.so has
larger .dynsym differences with GNU ld and LLD
(non-default version symbols are changed to default versions
by a version script BZ #28196).
This commit is contained in:
Fangrui Song
parent
60dfb30976
commit
224edada60
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@ -4664,9 +4664,11 @@ if test $ac_verc_fail = yes; then
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fi
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if test -n "`$LD --version | sed -n 's/^GNU \(gold\).*$/\1/p'`"; then
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libc_cv_with_lld=no
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case $($LD --version) in
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"GNU gold"*)
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# Accept gold 1.14 or higher
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for ac_prog in $LD
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for ac_prog in $LD
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do
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# Extract the first word of "$ac_prog", so it can be a program name with args.
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set dummy $ac_prog; ac_word=$2
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@ -4729,8 +4731,76 @@ if test $ac_verc_fail = yes; then
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LD=: critic_missing="$critic_missing GNU gold"
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fi
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;;
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"LLD"*)
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# Accept LLD 13.0.0 or higher
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for ac_prog in $LD
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do
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# Extract the first word of "$ac_prog", so it can be a program name with args.
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set dummy $ac_prog; ac_word=$2
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
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$as_echo_n "checking for $ac_word... " >&6; }
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if ${ac_cv_prog_LD+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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for ac_prog in $LD
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if test -n "$LD"; then
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ac_cv_prog_LD="$LD" # Let the user override the test.
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else
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_exec_ext in '' $ac_executable_extensions; do
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if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
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ac_cv_prog_LD="$ac_prog"
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$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
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break 2
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fi
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done
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done
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IFS=$as_save_IFS
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fi
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fi
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LD=$ac_cv_prog_LD
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if test -n "$LD"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
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$as_echo "$LD" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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test -n "$LD" && break
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done
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if test -z "$LD"; then
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ac_verc_fail=yes
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else
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# Found it, now check the version.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
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$as_echo_n "checking version of $LD... " >&6; }
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ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*LLD.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
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case $ac_prog_version in
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'') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
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1[3-9].*|[2-9][0-9].*)
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ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
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*) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
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esac
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
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$as_echo "$ac_prog_version" >&6; }
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fi
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if test $ac_verc_fail = yes; then
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LD=: critic_missing="$critic_missing LLD"
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fi
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libc_cv_with_lld=yes
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;;
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*)
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for ac_prog in $LD
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do
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# Extract the first word of "$ac_prog", so it can be a program name with args.
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set dummy $ac_prog; ac_word=$2
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@ -4793,7 +4863,10 @@ if test $ac_verc_fail = yes; then
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LD=: critic_missing="$critic_missing GNU ld"
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fi
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fi
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;;
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esac
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config_vars="$config_vars
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with-lld = $libc_cv_with_lld"
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# These programs are version sensitive.
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for ac_prog in gnumake gmake make
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23
configure.ac
23
configure.ac
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@ -995,18 +995,31 @@ AC_CHECK_PROG_VER(AS, $AS, --version,
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[2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
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AS=: critic_missing="$critic_missing as")
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if test -n "`$LD --version | sed -n 's/^GNU \(gold\).*$/\1/p'`"; then
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libc_cv_with_lld=no
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case $($LD --version) in
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"GNU gold"*)
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# Accept gold 1.14 or higher
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AC_CHECK_PROG_VER(LD, $LD, --version,
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AC_CHECK_PROG_VER(LD, $LD, --version,
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[GNU gold.* \([0-9][0-9]*\.[0-9.]*\)],
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[1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*],
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LD=: critic_missing="$critic_missing GNU gold")
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else
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AC_CHECK_PROG_VER(LD, $LD, --version,
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;;
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"LLD"*)
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# Accept LLD 13.0.0 or higher
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AC_CHECK_PROG_VER(LD, $LD, --version,
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[LLD.* \([0-9][0-9]*\.[0-9.]*\)],
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[1[3-9].*|[2-9][0-9].*],
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LD=: critic_missing="$critic_missing LLD")
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libc_cv_with_lld=yes
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;;
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*)
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AC_CHECK_PROG_VER(LD, $LD, --version,
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[GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
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[2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
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LD=: critic_missing="$critic_missing GNU ld")
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fi
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;;
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esac
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LIBC_CONFIG_VAR([with-lld], [$libc_cv_with_lld])
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# These programs are version sensitive.
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AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
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@ -22,12 +22,16 @@ tests += \
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tst-ifunc-isa-1-static
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tests-static += \
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tst-ifunc-isa-1-static
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test-xfail-tst-ifunc-isa-1 = $(with-lld)
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test-xfail-tst-ifunc-isa-1-static = $(with-lld)
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ifneq ($(have-tunables),no)
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tests += \
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tst-ifunc-isa-2 \
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tst-ifunc-isa-2-static
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tests-static += \
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tst-ifunc-isa-2-static
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test-xfail-tst-ifunc-isa-2 = $(with-lld)
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test-xfail-tst-ifunc-isa-2-static = $(with-lld)
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endif
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endif
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endif
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