sci-electronics/yosys: fix flags, CMake 4 and S=WORKDIR QA

Strip the hardcoded -O3, -ggdb and -fPIE so user flags win, bump the
bundled cxxopts and abc cmake minimums, and unpack into a subdirectory.

Closes: https://bugs.gentoo.org/979741
Closes: https://bugs.gentoo.org/979742
Closes: https://bugs.gentoo.org/979747
Signed-off-by: Huang Rui <vowstar@gmail.com>

sci-electronics/yosys/files/yosys-0.67-cmake4-compat.patch

@@ -0,0 +1,24 @@
+--- a/libs/cxxopts/test/add-subdirectory-test/CMakeLists.txt	2026-07-24 02:58:37.615590179 -0700
++++ b/libs/cxxopts/test/add-subdirectory-test/CMakeLists.txt	2026-07-24 02:58:58.775346667 -0700
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 3.1)
++cmake_minimum_required(VERSION 3.10)
+ 
+ project(cxxopts-test)
+ 
+--- a/libs/cxxopts/test/find-package-test/CMakeLists.txt	2026-07-24 02:58:37.616579140 -0700
++++ b/libs/cxxopts/test/find-package-test/CMakeLists.txt	2026-07-24 02:58:58.775391796 -0700
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 3.1)
++cmake_minimum_required(VERSION 3.10)
+ 
+ project(cxxopts-test)
+ 
+--- a/abc/CMakeLists.txt	2026-07-24 02:58:37.614680285 -0700
++++ b/abc/CMakeLists.txt	2026-07-24 02:58:58.776166078 -0700
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 3.5.0)
++cmake_minimum_required(VERSION 3.10)
+ 
+ include(CMakeParseArguments)
+ include(CheckCCompilerFlag)

sci-electronics/yosys/files/yosys-0.67-respect-flags.patch

@@ -0,0 +1,23 @@
+--- a/CMakeLists.txt	2026-07-24 02:58:37.612840968 -0700
++++ b/CMakeLists.txt	2026-07-24 02:58:45.716817612 -0700
+@@ -92,8 +92,8 @@
+ 
+ if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
+ 	set(CMAKE_CXX_FLAGS_DEBUG "-Og -ggdb")
+-	set(CMAKE_CXX_FLAGS_RELEASE "-O3")
+-	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -ggdb")
++	set(CMAKE_CXX_FLAGS_RELEASE "")
++	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "")
+ 	set(CMAKE_CXX_FLAGS_MINSIZEREL "-Os")
+ 	set(CMAKE_CXX_FLAGS_SANITIZE "-O1 -fno-omit-frame-pointer -fno-optimize-sibling-calls")
+ 	if ("${SANITIZE}" MATCHES "memory")
+--- a/cmake/YosysLinkTarget.cmake	2026-07-24 02:58:37.613755421 -0700
++++ b/cmake/YosysLinkTarget.cmake	2026-07-24 02:58:52.735004882 -0700
+@@ -50,6 +50,7 @@
+ 		PREFIX "${YOSYS_PROGRAM_PREFIX}"
+ 		OUTPUT_NAME "${arg_OUTPUT_NAME}"
+ 		RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}
++		POSITION_INDEPENDENT_CODE OFF
+ 	)
+ 	if (${arg_INSTALL_IF})
+ 		install(TARGETS ${arg_TARGET} DESTINATION ${YOSYS_INSTALL_BINDIR})

sci-electronics/yosys/yosys-0.67-r1.ebuild

@@ -13,7 +13,7 @@ HOMEPAGE="https://yosyshq.net/yosys/"
 SRC_URI="
 	https://github.com/YosysHQ/${PN}/releases/download/v${PV}/yosys.tar.gz -> ${P}.tar.gz
 "
-S="${WORKDIR}"
+S="${WORKDIR}/${P}"
 
 LICENSE="ISC"
 SLOT="0"
@@ -40,6 +40,11 @@ BDEPEND="
 	virtual/pkgconfig
 "
 
+PATCHES=(
+	"${FILESDIR}"/${P}-respect-flags.patch
+	"${FILESDIR}"/${P}-cmake4-compat.patch
+)
+
 pkg_setup() {
 	# llvm-r2 and python-any-r1 both export pkg_setup and llvm-r2 wins,
 	# leaving PYTHON unset, so call python_setup ourselves.
@@ -47,12 +52,19 @@ pkg_setup() {
 	python_setup
 }
 
+src_unpack() {
+	mkdir "${S}" || die
+	cd "${S}" || die
+	unpack ${A}
+}
+
 src_configure() {
 	local mycmakeargs=(
 		-DYOSYS_WITHOUT_SLANG=ON
 		-DYOSYS_WITH_PYTHON=OFF
 		-DYOSYS_INSTALL_DRIVER=ON
 		-DPython3_EXECUTABLE="${PYTHON}"
+		-DCMAKE_DISABLE_FIND_PACKAGE_GTest=ON
 	)
 	cmake_src_configure
 }