From 700d457295ac3ca7d139de8c90cceead03fad696 Mon Sep 17 00:00:00 2001 From: Rainer Orth Date: Tue, 5 May 2020 10:42:23 +0200 Subject: build: Fix 32-bit TLS detection with 64-bit-default gas on Solaris/x86 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. * configure.ac : Add --32 to tls_as_opt on Solaris. * configure: Regenerate. --- gcc/configure.ac | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'gcc/configure.ac') diff --git a/gcc/configure.ac b/gcc/configure.ac index 12297b7369e..0de3b4bf97b 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -3544,6 +3544,11 @@ 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 -- cgit v1.2.3