sys-devel/llvm: filter LTO for GCC again

These failures aren't GCC specific but only GCC has these warnings implemented
and it's less likely that LLVM will miscompile itself because people will test
it more, even if the issue is UB in LLVM.

Filter to avoid people hitting roadblocks on a common package when using
safe LTO flags (-Werror=...).

Closes: https://bugs.gentoo.org/917536
Closes: https://bugs.gentoo.org/926529
Signed-off-by: Sam James <sam@gentoo.org>

5 files changed, 30 insertions, 5 deletions

diff --git a/sys-devel/llvm/llvm-17.0.6.ebuild b/sys-devel/llvm/llvm-17.0.6.ebuild
index c5159086d72c..bb3bd996f1e3 100644
--- a/sys-devel/llvm/llvm-17.0.6.ebuild
+++ b/sys-devel/llvm/llvm-17.0.6.ebuild
@@ -5,7 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..12} )
 
-inherit cmake llvm.org multilib-minimal pax-utils python-any-r1
+inherit cmake flag-o-matic llvm.org multilib-minimal pax-utils python-any-r1
 inherit toolchain-funcs
 
 DESCRIPTION="Low Level Virtual Machine"
@@ -338,6 +338,11 @@ get_distribution_components() {
 }
 
 multilib_src_configure() {
+	# ODR violations (bug #917536, bug #926529). Just do it for GCC for now
+	# to avoid people grumbling. GCC is, anecdotally, more likely to miscompile
+	# LLVM with LTO anyway (which is not necessarily its fault).
+	tc-is-gcc && filter-lto
+
 	local ffi_cflags ffi_ldflags
 	if use libffi; then
 		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
diff --git a/sys-devel/llvm/llvm-18.1.0.ebuild b/sys-devel/llvm/llvm-18.1.0.ebuild
index 4c955a46c3e0..af10d82f811a 100644
--- a/sys-devel/llvm/llvm-18.1.0.ebuild
+++ b/sys-devel/llvm/llvm-18.1.0.ebuild
@@ -5,7 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..12} )
 
-inherit cmake llvm.org multilib-minimal pax-utils python-any-r1
+inherit cmake flag-o-matic llvm.org multilib-minimal pax-utils python-any-r1
 inherit toolchain-funcs
 
 DESCRIPTION="Low Level Virtual Machine"
@@ -346,6 +346,11 @@ get_distribution_components() {
 }
 
 multilib_src_configure() {
+	# ODR violations (bug #917536, bug #926529). Just do it for GCC for now
+	# to avoid people grumbling. GCC is, anecdotally, more likely to miscompile
+	# LLVM with LTO anyway (which is not necessarily its fault).
+	tc-is-gcc && filter-lto
+
 	local ffi_cflags ffi_ldflags
 	if use libffi; then
 		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
diff --git a/sys-devel/llvm/llvm-19.0.0.9999.ebuild b/sys-devel/llvm/llvm-19.0.0.9999.ebuild
index 5031f93dd455..b4633658a186 100644
--- a/sys-devel/llvm/llvm-19.0.0.9999.ebuild
+++ b/sys-devel/llvm/llvm-19.0.0.9999.ebuild
@@ -5,7 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..12} )
 
-inherit cmake llvm.org multilib-minimal pax-utils python-any-r1
+inherit cmake flag-o-matic llvm.org multilib-minimal pax-utils python-any-r1
 inherit toolchain-funcs
 
 DESCRIPTION="Low Level Virtual Machine"
@@ -345,6 +345,11 @@ get_distribution_components() {
 }
 
 multilib_src_configure() {
+	# ODR violations (bug #917536, bug #926529). Just do it for GCC for now
+	# to avoid people grumbling. GCC is, anecdotally, more likely to miscompile
+	# LLVM with LTO anyway (which is not necessarily its fault).
+	tc-is-gcc && filter-lto
+
 	local ffi_cflags ffi_ldflags
 	if use libffi; then
 		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
diff --git a/sys-devel/llvm/llvm-19.0.0_pre20240302.ebuild b/sys-devel/llvm/llvm-19.0.0_pre20240302.ebuild
index 5031f93dd455..b4633658a186 100644
--- a/sys-devel/llvm/llvm-19.0.0_pre20240302.ebuild
+++ b/sys-devel/llvm/llvm-19.0.0_pre20240302.ebuild
@@ -5,7 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..12} )
 
-inherit cmake llvm.org multilib-minimal pax-utils python-any-r1
+inherit cmake flag-o-matic llvm.org multilib-minimal pax-utils python-any-r1
 inherit toolchain-funcs
 
 DESCRIPTION="Low Level Virtual Machine"
@@ -345,6 +345,11 @@ get_distribution_components() {
 }
 
 multilib_src_configure() {
+	# ODR violations (bug #917536, bug #926529). Just do it for GCC for now
+	# to avoid people grumbling. GCC is, anecdotally, more likely to miscompile
+	# LLVM with LTO anyway (which is not necessarily its fault).
+	tc-is-gcc && filter-lto
+
 	local ffi_cflags ffi_ldflags
 	if use libffi; then
 		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)
diff --git a/sys-devel/llvm/llvm-19.0.0_pre20240309.ebuild b/sys-devel/llvm/llvm-19.0.0_pre20240309.ebuild
index 5031f93dd455..b4633658a186 100644
--- a/sys-devel/llvm/llvm-19.0.0_pre20240309.ebuild
+++ b/sys-devel/llvm/llvm-19.0.0_pre20240309.ebuild
@@ -5,7 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{10..12} )
 
-inherit cmake llvm.org multilib-minimal pax-utils python-any-r1
+inherit cmake flag-o-matic llvm.org multilib-minimal pax-utils python-any-r1
 inherit toolchain-funcs
 
 DESCRIPTION="Low Level Virtual Machine"
@@ -345,6 +345,11 @@ get_distribution_components() {
 }
 
 multilib_src_configure() {
+	# ODR violations (bug #917536, bug #926529). Just do it for GCC for now
+	# to avoid people grumbling. GCC is, anecdotally, more likely to miscompile
+	# LLVM with LTO anyway (which is not necessarily its fault).
+	tc-is-gcc && filter-lto
+
 	local ffi_cflags ffi_ldflags
 	if use libffi; then
 		ffi_cflags=$($(tc-getPKG_CONFIG) --cflags-only-I libffi)