sci-physics/hepmc: cmake4 patches

Closes: https://bugs.gentoo.org/968135
Part-of: https://github.com/gentoo/gentoo/pull/45488
Closes: https://github.com/gentoo/gentoo/pull/45488
Signed-off-by: Alexander Puck Neuwirth <apn-pucky@gentoo.org>

sci-physics/hepmc/files/hepmc-2.06.11-cmake4.patch

@@ -0,0 +1,31 @@
+https://gitlab.cern.ch/hepmc/HepMC/-/merge_requests/16
+From 1bb90ccda81187c71c1e234e3d55390684ce1041 Mon Sep 17 00:00:00 2001
+From: Giulio Eulisse <10544+ktf@users.noreply.github.com>
+Date: Tue, 6 Jan 2026 13:39:58 +0100
+Subject: [PATCH] Add support for CMake 4
+
+Upstream deprecated support for CMake <= 3.5.
+
+See https://cmake.org/cmake/help/latest/release/4.0.html#deprecated-and-removed-features
+---
+ CMakeLists.txt | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 7b2dd93..6d7e807 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -13,8 +13,8 @@
+ # which matches the default HepMC autoconf flags
+ #------------------------------------------------------------------------------
+ 
+-# use cmake 2.6 or later
+-cmake_minimum_required (VERSION 2.6)
++# use cmake 3.16 or later
++cmake_minimum_required (VERSION 3.16)
+
+ # project name and version
+ project(HepMC)
+-- 
+GitLab
+

sci-physics/hepmc/files/hepmc-2.06.11-cmp0153.patch

@@ -0,0 +1,49 @@
+https://gitlab.cern.ch/hepmc/HepMC/-/merge_requests/17
+From 3b1f6ebfa2af3e56013c8f9f771baa978bfe426d Mon Sep 17 00:00:00 2001
+From: Alexander Puck Neuwirth <alexander@neuwirth-informatik.de>
+Date: Thu, 22 Jan 2026 11:26:12 +0100
+Subject: [PATCH] fix: Policy CMP0153: The exec_program command should not be
+ called.
+
+---
+ cmake/Modules/HepMCUseCpack.cmake  | 5 +++--
+ cmake/Modules/HepMCVariables.cmake | 5 +++--
+ 2 files changed, 6 insertions(+), 4 deletions(-)
+
+diff --git a/cmake/Modules/HepMCUseCpack.cmake b/cmake/Modules/HepMCUseCpack.cmake
+index 49040b7..298cff0 100644
+--- a/cmake/Modules/HepMCUseCpack.cmake
++++ b/cmake/Modules/HepMCUseCpack.cmake
+@@ -8,9 +8,10 @@
+ #
+ FUNCTION(_My_COMPILER_DUMPVERSION _OUTPUT_VERSION)
+ 
+-  EXEC_PROGRAM(${CMAKE_CXX_COMPILER}
+-    ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
++  execute_process(
++    COMMAND ${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
+     OUTPUT_VARIABLE _my_COMPILER_VERSION
++    OUTPUT_STRIP_TRAILING_WHITESPACE
+   )
+   set( COMPILER_VERSION ${_my_COMPILER_VERSION} PARENT_SCOPE)
+   STRING(REGEX REPLACE "([0-9])\\.([0-9])(\\.[0-9])?" "\\1\\2"
+diff --git a/cmake/Modules/HepMCVariables.cmake b/cmake/Modules/HepMCVariables.cmake
+index bd8b713..475310b 100644
+--- a/cmake/Modules/HepMCVariables.cmake
++++ b/cmake/Modules/HepMCVariables.cmake
+@@ -10,9 +10,10 @@
+ # so we need this for the example makefile
+ macro( _hepmc_fortran_compiler )
+ 
+-  EXEC_PROGRAM(${CMAKE_CXX_COMPILER}
+-    ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
++  execute_process(
++    COMMAND ${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
+     OUTPUT_VARIABLE _my_COMPILER_VERSION
++    OUTPUT_STRIP_TRAILING_WHITESPACE
+   )
+   STRING(REGEX REPLACE "([0-9])\\.([0-9])(\\.[0-9])?" "\\1"
+     _my_COMPILER_BASE_VERSION ${_my_COMPILER_VERSION})
+-- 
+GitLab
+

sci-physics/hepmc/hepmc-2.06.11-r1.ebuild

@@ -0,0 +1,104 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake flag-o-matic
+
+MYP=HepMC-${PV}
+
+DESCRIPTION="Event Record for Monte Carlo Generators"
+HOMEPAGE="
+	https://hepmc.web.cern.ch/hepmc/
+	https://gitlab.cern.ch/hepmc/HepMC/
+"
+SRC_URI="https://hepmc.web.cern.ch/hepmc/releases/hepmc${PV}.tgz"
+S="${WORKDIR}/${MYP}"
+
+LICENSE="GPL-2"
+SLOT="2"
+KEYWORDS="~amd64 ~x86"
+IUSE="cm doc examples gev test"
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	doc? (
+		app-text/doxygen[dot]
+		dev-texlive/texlive-latex
+		dev-texlive/texlive-latexextra
+		dev-texlive/texlive-latexrecommended
+	)
+"
+
+PATCHES=(
+	"${FILESDIR}"/${P}-cmake4.patch
+	"${FILESDIR}"/${P}-cmp0153.patch
+)
+
+src_prepare() {
+	cmake_src_prepare
+
+	sed -i -e '/add_subdirectory(doc)/d' CMakeLists.txt || die
+	# CMake doc building broken
+	# gentoo doc directory
+	#sed -i \
+	#	-e "s:share/HepMC/doc:share/doc/${PF}:" \
+	#	doc/CMakeLists.txt || die
+
+	# gentoo examples directory
+	sed -i \
+		-e "s:share/HepMC:share/doc/${PF}:" \
+		$(find examples -name CMakeLists.txt) || die
+
+	# respect user's flags
+	sed -i \
+		-e "s/-O -ansi -pedantic -Wall//g" \
+		cmake/Modules/HepMCVariables.cmake || die
+
+	# gentoo libdir love
+	sed -i \
+		-e '/DESTINATION/s/lib/lib${LIB_SUFFIX}/g' \
+		{src,fio}/CMakeLists.txt || die
+
+	# remove targets if use flags not set
+	if ! use examples; then
+		sed -i -e '/add_subdirectory(examples)/d' CMakeLists.txt || die
+	fi
+	if ! use test; then
+		sed -i -e '/add_subdirectory(test)/d' CMakeLists.txt || die
+	fi
+
+	# remove static libs
+	sed -i \
+		-e '/(HepMC\(fio\|\)S/d' \
+		-e '/TARGETS/s/HepMC\(fio\|\)S//' \
+		{src,fio}/CMakeLists.txt || die
+}
+
+src_configure() {
+	# error: 'hepevt_' violates the C++ One Definition Rule [-Werror=odr]
+	# Bug 863284
+	filter-lto
+	# use MeV over GeV and mm over cm
+	local mycmakeargs=(
+		-Dlength=$(usex cm CM MM)
+		-Dmomentum=$(usex gev GEV MEV)
+	)
+	cmake_src_configure
+}
+
+src_compile() {
+	cmake_src_compile
+
+	if use doc; then
+		cd doc || die
+		./buildDoc.sh || die
+		./buildDoxygen.sh || die
+		HTML_DOCS=( doc/html/. )
+	fi
+}
+
+src_install() {
+	cmake_src_install
+	use doc && dodoc doc/*.pdf
+}