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| author | Fangrui Song <maskray@google.com> | 2021-08-30 13:59:33 -0700 |
|---|---|---|
| committer | Fangrui Song <maskray@google.com> | 2021-08-31 20:23:34 -0700 |
| commit | 224edada607ebc6aaa1aadaae423128fae7880df (patch) | |
| tree | 95f5da42b7f141f21bb460049257a6f34a2a7ce0 /configure.ac | |
| parent | 60dfb30976761c9b20a22f18356e0c3e581f5394 (diff) | |
| download | glibc-224edada607ebc6aaa1aadaae423128fae7880df.zip glibc-224edada607ebc6aaa1aadaae423128fae7880df.tar.gz glibc-224edada607ebc6aaa1aadaae423128fae7880df.tar.bz2 | |
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).
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index e250f0e..d923241 100644 --- a/configure.ac +++ b/configure.ac @@ -995,18 +995,31 @@ AC_CHECK_PROG_VER(AS, $AS, --version, [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], AS=: critic_missing="$critic_missing as") -if test -n "`$LD --version | sed -n 's/^GNU \(gold\).*$/\1/p'`"; then +libc_cv_with_lld=no +case $($LD --version) in + "GNU gold"*) # Accept gold 1.14 or higher - AC_CHECK_PROG_VER(LD, $LD, --version, + AC_CHECK_PROG_VER(LD, $LD, --version, [GNU gold.* \([0-9][0-9]*\.[0-9.]*\)], [1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing GNU gold") -else - AC_CHECK_PROG_VER(LD, $LD, --version, + ;; + "LLD"*) + # Accept LLD 13.0.0 or higher + AC_CHECK_PROG_VER(LD, $LD, --version, + [LLD.* \([0-9][0-9]*\.[0-9.]*\)], + [1[3-9].*|[2-9][0-9].*], + LD=: critic_missing="$critic_missing LLD") + libc_cv_with_lld=yes + ;; + *) + AC_CHECK_PROG_VER(LD, $LD, --version, [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)], [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], LD=: critic_missing="$critic_missing GNU ld") -fi + ;; +esac +LIBC_CONFIG_VAR([with-lld], [$libc_cv_with_lld]) # These programs are version sensitive. AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version, |