I've recently tested i386-pc-solaris2.11 bootstrap on Solaris 11/x86
with only the bundled tools (using /usr/gnu/bin/as from binutils 2.30 in
this case). It failed compiling libgo/runtime/proc.c, creating invalid
assembly:
proc.s: Assembler messages:
proc.s:2092: Error: junk at end of line, first unrecognized character is `*'
.globl __emutls_v.*runtime.g
and several more errors. This is completely unexpected since Solaris
does support TLS. It turned out that 32-bit TLS detection in
gcc/configure had failed:
configure:25145: checking assembler for thread-local storage support
configure:25158: /usr/gnu/bin/as --fatal-warnings -o conftest.o conftest.s >&5
conftest.s: Assembler messages:
conftest.s:6: Error: relocated field and relocation type differ in signedness
conftest.s:7: Error: @TLSLDM reloc is not supported with 64-bit output format
conftest.s:7: Error: junk `@tlsldm' after expression
which isn't unexpected given that the bundled gas has been configured
for x86_64-pc-solaris2.11, i.e. 64-bit-default.
This is easily fixed by explicitly passing --32 for the 32-bit case,
matching what is done for the 64-bit test.
Tested on i386-pc-solaris2.11 with 32-bit-default and 64-bit-default gas
as well as with /usr/bin/as, always correctly detecting TLS support.
I'm going to commit this to master shortly. Ok for the gcc-10 branch,
too, given that it fixes a bootstrap failure?
I wonder if it's worth pursuing or even properly reporting the libgo
failure with emutls, though. Ian?
Thanks.
Rainer
--
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University
2020-05-02 Rainer Orth <[email protected]>
* configure.ac <i[34567]86-*-*>: Add --32 to tls_as_opt on Solaris.
* configure: Regenerate.
# HG changeset patch
# Parent 536b6b3f48b6668fa1724b8675b1cceadaab5632
build: Fix 32-bit TLS detection with 64-bit-default gas on Solaris/x86
diff --git a/gcc/configure.ac b/gcc/configure.ac
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -3562,6 +3562,11 @@ changequote(,)dnl
fi
case "$target" in
i[34567]86-*-*)
+ if test x$on_solaris = xyes; then
+ case $gas_flag in
+ yes) tls_as_opt="$tls_as_opt --32" ;;
+ esac
+ fi
conftest_s="$conftest_s
foo: .long 25
.text
