Bug 1278456 - Bump glibc requirement to 2.12. r?froydnj
The requirement for glibc has been set to version 2.7 for a long while.
Spidermonkey uses the pthread_setname_np symbol, which is only available
since glibc 2.12. So far, we've been fortunate that the symbol doesn't
end up in libxul, or tests that link to js directly, because the symbol
is eliminated as being called by effectively dead code.
There are multiple reasons why this is going to change, one of which
being changes to the way things are linked, that will make the linker
not eliminate that code in some cases. Another is that eventually, the
separation of build systems between js and top-level is going to fade,
and the glibc checks, which apply to all gecko binaries, will also apply
to js binaries. They currently are not happening, and would fail because
of pthread_setname_np if they were.
Taking a step back, as of version 46, the mozilla.org builds require at
least Gtk+3 3.4. Which means the requirements for the underlying system
have received a dramatic bump, and it's time to revisit the requirements
for binary compatibility.
I went through all my notes from all the recent times binary compatibility
has been considered, and put together a compatibility matrix on MDN from
that data as well as more recent data that I could find here and there,
about the major non-rolling-release distros (RHEL, Fedora, SuSE, Debian,
Ubuntu)
https://developer.mozilla.org/en-US/Firefox/Linux_compatibility_matrix
Considering the data there, none of the distros that have at least Gtk+3
3.4 have a glibc older than 2.13. The list of symbols that 2.13 provides
that 2.12 doesn't have is not large enough, though, to really care about
depending on 2.13.
--- a/config/config.mk
+++ b/config/config.mk
@@ -551,17 +551,17 @@ END { \
if (found) { \
exit(1) \
} \
}'
endef
ifneq (,$(MOZ_LIBSTDCXX_TARGET_VERSION)$(MOZ_LIBSTDCXX_HOST_VERSION))
CHECK_STDCXX = $(call CHECK_SYMBOLS,$(1),GLIBCXX,libstdc++,v[1] > 3 || (v[1] == 3 && v[2] == 4 && v[3] > 10))
-CHECK_GLIBC = $(call CHECK_SYMBOLS,$(1),GLIBC,libc,v[1] > 2 || (v[1] == 2 && v[2] > 7))
+CHECK_GLIBC = $(call CHECK_SYMBOLS,$(1),GLIBC,libc,v[1] > 2 || (v[1] == 2 && v[2] > 12))
endif
ifeq (,$(filter $(OS_TARGET),WINNT Darwin))
CHECK_TEXTREL = @$(TOOLCHAIN_PREFIX)readelf -d $(1) | grep TEXTREL > /dev/null && echo 'TEST-UNEXPECTED-FAIL | check_textrel | We do not want text relocations in libraries and programs' || true
endif
ifeq ($(MOZ_WIDGET_TOOLKIT),android)
# While this is very unlikely (libc being added by the compiler at the end