http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60817
Bug ID: 60817
Summary: gcc configure script misdetects TLS support on
x86_64-pc-solaris* with gnu as
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: redlizard at redlizard dot nl
Created attachment 32584
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32584&action=edit
Proposed patch.
When building gcc >= 4.7 on x86_64-pc-solaris2.11 --with-gnu-as, the
gcc/configure script incorrectly decides that gnu as does not support real TLS,
and so unnecessarily decides to activate emutls instead.
The solaris-specific test checks this support by trying to assemble a piece of
TLS-using assembly code, and it uses the same 32-bit code for this test both on
32-bit and 64-bit platforms. The solaris assembler will accept this, but gnu as
fails on the 32 bit code when targeting x86_64-pc-solaris*, thus causing the
detection to fail.
Attached patch for 4.9 fixes the problem, and is trivially backported to 4.8
and 4.7.
