From a3fb510ac9d70de059a99ccb35b247962f5bc18e Mon Sep 17 00:00:00 2001
From: Flatcar Buildbot <buildbot@flatcar-linux.org>
Date: Mon, 7 Jul 2025 07:10:24 +0000
Subject: [PATCH] eclass/flag-o-matic: Sync with Gentoo

It's from Gentoo commit 74d25eedd9c327fe91048b06ad81b86eb14d9cb7.
---
 .../portage-stable/eclass/flag-o-matic.eclass | 26 ++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass b/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass
index f22854c646..1c9abe1280 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass
@@ -636,6 +636,11 @@ _test-flag-PROG() {
 
 			cmdline_extra+=(-xc)
 			;;
+		hip)
+			in_ext='hip'
+			in_src='int main(void) { return 0; }'
+			cmdline_extra+=(-xhip -c)
+			;;
 	esac
 	local test_in=${T}/test-flag.${in_ext}
 	local test_out=${T}/test-flag.exe
@@ -707,6 +712,12 @@ test-flag-FC() { _test-flag-PROG FC f95 "$@"; }
 # Returns shell true if <flag> is supported by the C compiler and linker, else returns shell false.
 test-flag-CCLD() { _test-flag-PROG CC c+ld "$@"; }
 
+# @FUNCTION: test-flag-HIPCXX
+# @USAGE: <flag>
+# @DESCRIPTION:
+# Returns shell true if <flag> is supported by the HIP compiler, else returns shell false.
+test-flag-HIPCXX() { _test-flag-PROG HIPCXX hip "$@"; }
+
 # @FUNCTION: test-flags-PROG
 # @USAGE: <compiler> <flag> [more flags...]
 # @INTERNAL
@@ -788,6 +799,12 @@ test-flags-FC() { _test-flags-PROG FC "$@"; }
 # Returns shell true if <flags> are supported by the C compiler and default linker, else returns shell false.
 test-flags-CCLD() { _test-flags-PROG CCLD "$@"; }
 
+# @FUNCTION: test-flags-HIPCXX
+# @USAGE: <flags>
+# @DESCRIPTION:
+# Returns shell true if <flags> are supported by the HIP compiler and default linker, else returns shell false.
+test-flags-HIPCXX() { _test-flags-PROG HIPCXX "$@"; }
+
 # @FUNCTION: test-flags
 # @USAGE: <flags>
 # @DESCRIPTION:
@@ -810,7 +827,7 @@ test_version_info() {
 
 # @FUNCTION: strip-unsupported-flags
 # @DESCRIPTION:
-# Strip {C,CXX,F,FC}FLAGS of any flags not supported by the active toolchain.
+# Strip {C,CXX,F,FC,HIP}FLAGS of any flags not supported by the active toolchain.
 strip-unsupported-flags() {
 	[[ $# -ne 0 ]] && die "strip-unsupported-flags takes no arguments"
 	export CFLAGS=$(test-flags-CC ${CFLAGS})
@@ -818,6 +835,7 @@ strip-unsupported-flags() {
 	export FFLAGS=$(test-flags-F77 ${FFLAGS})
 	export FCFLAGS=$(test-flags-FC ${FCFLAGS})
 	export LDFLAGS=$(test-flags-CCLD ${LDFLAGS})
+	export HIPFLAGS=$(test-flags-HIPCXX ${HIPFLAGS})
 }
 
 # @FUNCTION: get-flag
@@ -1008,6 +1026,12 @@ test-compile() {
 			args+=(${FCFLAGS[@]} ${LDFLAGS[@]} -xf95)
 			libs+=(${LIBS[@]})
 			;;
+		hip)
+			compiler="$(tc-getHIPCXX)"
+			filename_in="${T}/test.hip"
+			filename_out="${T}/test.o"
+			args+=(${CFLAGS[@]} -xhip -c)
+			;;
 		*)
 			die "Unknown compiled language ${lang}"
 			;;