[PATCH] mesa: Disble TLS for musl

[PATCH] mesa: Disble TLS for musl

[Khem Raj]

See https://bugs.freedesktop.org/show_bug.cgi?id=35268
mesa should infact stop using __attribute__((tls_model("initial-exec")))
until then we disale TLS in glx for musl
The problem could happen even on glibc if static TLS sizes are large enough
which would mean that additional space the glibc leaves for such rogue libraries
get consumed and then same problems show up there as well

Fixes errors seen in xorg logs e.g.

(EE) Failed to load /usr/lib/xorg/modules/extensions/libglx.so: Error relocating /usr/lib/libGL.so.1: _ITM_deregisterTMCloneTable: initial-exec TLS resolves to dynamic definition in /usr/lib/libGL.so.1

enable readonly text segment on x86 for musl

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 meta/recipes-graphics/mesa/mesa.inc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-graphics/mesa/mesa.inc b/meta/recipes-graphics/mesa/mesa.inc
index 860a2d94cc..3a723b59a6 100644
--- a/meta/recipes-graphics/mesa/mesa.inc
+++ b/meta/recipes-graphics/mesa/mesa.inc
@@ -105,11 +105,15 @@ PACKAGECONFIG[osmesa] = "--enable-${OSMESA},--disable-${OSMESA}"
 
 PACKAGECONFIG[unwind] = "--enable-libunwind,--disable-libunwind,libunwind"
 
+EXTRA_OECONF_remove_libc-musl = "--enable-glx-tls"
+EXTRA_OECONF_append_libc-musl = " --disable-glx-tls"
+
 # llvmpipe is slow if compiled with -fomit-frame-pointer (e.g. -O2)
 FULL_OPTIMIZATION_append = " -fno-omit-frame-pointer"
 
 CFLAGS_append_armv5 = " -DMISSING_64BIT_ATOMICS"
-
+CFLAGS_append_x86_libc-musl = " -DGLX_X86_READONLY_TEXT"
+CFLAGS_append_x86-64_libc-musl = " -DGLX_X86_READONLY_TEXT"
 EXTRA_OEMAKE += "WAYLAND_PROTOCOLS_DATADIR=${STAGING_DATADIR}/wayland-protocols"
 
 # Remove the mesa dependency on mesa-dev, as mesa is empty
-- 
2.18.0