3 files changed, 33 insertions, 0 deletions
diff --git a/sys-devel/mold/mold-1.0.3.ebuild b/sys-devel/mold/mold-1.0.3.ebuild
index 7948bbc23805..5536efda5951 100644
--- a/sys-devel/mold/mold-1.0.3.ebuild
+++ b/sys-devel/mold/mold-1.0.3.ebuild
@@ -31,6 +31,17 @@ RDEPEND=">=dev-cpp/tbb-2021.4.0:=
 	)"
 DEPEND="${RDEPEND}"
 
+pkg_pretend() {
+	# Requires a c++20 compiler, see #831437
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		if tc-is-gcc && [[ $(gcc-major-version) -lt 10 ]]; then
+			die "${PN} needs at least gcc 10"
+		elif tc-is-clang && [[ $(clang-major-version) -lt 12 ]]; then
+			die "${PN} needs at least clang 12"
+		fi
+	fi
+}
+
 src_prepare() {
 	default
 
diff --git a/sys-devel/mold/mold-1.1.ebuild b/sys-devel/mold/mold-1.1.ebuild
index caa630e22c18..351ef38c6b51 100644
--- a/sys-devel/mold/mold-1.1.ebuild
+++ b/sys-devel/mold/mold-1.1.ebuild
@@ -32,6 +32,17 @@ RDEPEND=">=dev-cpp/tbb-2021.4.0:=
 # TODO: restore SYSTEM_XXHASH upstream?
 DEPEND="${RDEPEND}"
 
+pkg_pretend() {
+	# Requires a c++20 compiler, see #831473
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		if tc-is-gcc && [[ $(gcc-major-version) -lt 10 ]]; then
+			die "${PN} needs at least gcc 10"
+		elif tc-is-clang && [[ $(clang-major-version) -lt 12 ]]; then
+			die "${PN} needs at least clang 12"
+		fi
+	fi
+}
+
 src_prepare() {
 	default
 
diff --git a/sys-devel/mold/mold-9999.ebuild b/sys-devel/mold/mold-9999.ebuild
index caa630e22c18..351ef38c6b51 100644
--- a/sys-devel/mold/mold-9999.ebuild
+++ b/sys-devel/mold/mold-9999.ebuild
@@ -32,6 +32,17 @@ RDEPEND=">=dev-cpp/tbb-2021.4.0:=
 # TODO: restore SYSTEM_XXHASH upstream?
 DEPEND="${RDEPEND}"
 
+pkg_pretend() {
+	# Requires a c++20 compiler, see #831473
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		if tc-is-gcc && [[ $(gcc-major-version) -lt 10 ]]; then
+			die "${PN} needs at least gcc 10"
+		elif tc-is-clang && [[ $(clang-major-version) -lt 12 ]]; then
+			die "${PN} needs at least clang 12"
+		fi
+	fi
+}
+
 src_prepare() {
 	default