dev-libs/rocr-runtime: NDEBUG by default; add debug use flag

The rocr-runtime relies on -DNDEBUG cxxflag to build without debug code.
Previously debug codes are turned on and issues are observed by users.

Reference: https://github.com/RadeonOpenCompute/ROCm/issues/1880#issuecomment-1416759759
Signed-off-by: Yiyang Wu <xgreenlandforwyy@gmail.com>
Closes: https://github.com/gentoo/gentoo/pull/29297
Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/rocr-runtime/rocr-runtime-5.3.3-r1.ebuild

@@ -3,7 +3,7 @@
 
 EAPI=8
 
-inherit cmake llvm
+inherit cmake flag-o-matic llvm
 
 LLVM_MAX_SLOT=15
 
@@ -25,6 +25,7 @@ PATCHES=(
 
 LICENSE="MIT"
 SLOT="0/$(ver_cut 1-2)"
+IUSE="debug"
 
 COMMON_DEPEND="dev-libs/elfutils"
 RDEPEND="${COMMON_DEPEND}"
@@ -36,8 +37,6 @@ DEPEND="${COMMON_DEPEND}
 BDEPEND="app-editors/vim-core"
 	# vim-core is needed for "xxd"
 
-CMAKE_BUILD_TYPE=Release
-
 src_prepare() {
 	# ... otherwise system llvm/clang is used ...
 	sed -e "/find_package(Clang REQUIRED HINTS /s:\${CMAKE_INSTALL_PREFIX}/llvm \${CMAKE_PREFIX_PATH}/llvm PATHS /opt/rocm/llvm:$(get_llvm_prefix ${LLVM_MAX_SLOT}):" -i image/blit_src/CMakeLists.txt || die
@@ -49,6 +48,7 @@ src_prepare() {
 }
 
 src_configure() {
+	use debug || append-cxxflags "-DNDEBUG"
 	local mycmakeargs=( -DINCLUDE_PATH_COMPATIBILITY=OFF )
 	cmake_src_configure
 }