dev-libs/json-c: Sync with Gentoo

It's from Gentoo commit 87dd721dfc5e069f58725070880c226464ede5de.

sdk_container/src/third_party/portage-stable/dev-libs/json-c/Manifest

@@ -1 +1,2 @@
 DIST json-c-0.17.tar.gz 390045 BLAKE2B 26be25141447f2b652fa09d7096141a8bf7992469bcc53b275c1bc0108fc36a8898a8185c381218d3146d00fa03bdd0b837be073410fc93af943b5f083dbaa69 SHA512 4cbedd559502bf9014cfcd1d0bb8bb80d2abac4e969d95d4170123cd9cbafb0756b913fdbb83f666d14f674d6539a60ed1c5d0eb03c36b8037a2e00dc1636e19
+DIST json-c-0.18.tar.gz 401788 BLAKE2B d39bab289976cb2f76bcf3ad8254f7f5b4d11e2aa4dedebd60dc7d131a3f6ec57beacdc575aeeb191cf449d16c549d424172e78464731eeb66305f47f72371c2 SHA512 4763f2352414dac3599bc2183b4fa57dbfaac0ca24de890097bd7d0bdda93c91efa280f6566e949e6d94212ef39a63fc76c5f9d0c54ff3d04b13c859717dba5a

sdk_container/src/third_party/portage-stable/dev-libs/json-c/json-c-0.18.ebuild

@@ -0,0 +1,68 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake-multilib
+
+DESCRIPTION="A JSON implementation in C"
+HOMEPAGE="https://github.com/json-c/json-c/wiki"
+
+if [[ ${PV} == 9999 ]] ; then
+	EGIT_REPO_URI="https://github.com/json-c/json-c.git"
+	inherit git-r3
+else
+	SRC_URI="https://s3.amazonaws.com/json-c_releases/releases/${P}.tar.gz"
+
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos"
+fi
+
+LICENSE="MIT"
+# .1 is a fudge factor for 0.18 fixing compat w/ 0.16, drop on next
+# SONAME change.
+SLOT="0/5.1"
+IUSE="cpu_flags_x86_rdrand doc static-libs threads"
+
+BDEPEND="doc? ( >=app-text/doxygen-1.8.13 )"
+
+MULTILIB_WRAPPED_HEADERS=(
+	/usr/include/json-c/config.h
+)
+
+multilib_src_configure() {
+	# Tests use Valgrind automagically otherwise (bug #927027)
+	export USE_VALGRIND=0
+
+	local mycmakeargs=(
+		# apps are not installed, so disable unconditionally.
+		# https://github.com/json-c/json-c/blob/json-c-0.17-20230812/apps/CMakeLists.txt#L119...L121
+		-DBUILD_APPS=OFF
+		-DBUILD_STATIC_LIBS=$(usex static-libs)
+		-DDISABLE_EXTRA_LIBS=ON
+		-DDISABLE_WERROR=ON
+		-DENABLE_RDRAND=$(usex cpu_flags_x86_rdrand)
+		-DENABLE_THREADING=$(usex threads)
+	)
+
+	cmake_src_configure
+}
+
+multilib_src_compile() {
+	cmake_src_compile
+	if use doc && multilib_is_native_abi; then
+		cmake_build doc
+	fi
+}
+
+multilib_src_test() {
+	multilib_is_native_abi && cmake_src_test
+}
+
+multilib_src_install() {
+	cmake_src_install
+
+	if multilib_is_native_abi; then
+		use doc && HTML_DOCS=( "${BUILD_DIR}"/doc/html/. )
+		einstalldocs
+	fi
+}

sdk_container/src/third_party/portage-stable/dev-libs/json-c/json-c-9999.ebuild

@@ -3,14 +3,24 @@
 
 EAPI=8
 
-inherit cmake-multilib git-r3 multibuild
+inherit cmake-multilib
 
 DESCRIPTION="A JSON implementation in C"
 HOMEPAGE="https://github.com/json-c/json-c/wiki"
-EGIT_REPO_URI="https://github.com/json-c/json-c.git"
+
+if [[ ${PV} == 9999 ]] ; then
+	EGIT_REPO_URI="https://github.com/json-c/json-c.git"
+	inherit git-r3
+else
+	SRC_URI="https://s3.amazonaws.com/json-c_releases/releases/${P}.tar.gz"
+
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos"
+fi
 
 LICENSE="MIT"
-SLOT="0/5"
+# .1 is a fudge factor for 0.18 fixing compat w/ 0.16, drop on next
+# SONAME change.
+SLOT="0/5.1"
 IUSE="cpu_flags_x86_rdrand doc static-libs threads"
 
 BDEPEND="doc? ( >=app-text/doxygen-1.8.13 )"
@@ -49,6 +59,8 @@ multilib_src_test() {
 }
 
 multilib_src_install() {
+	cmake_src_install
+
 	if multilib_is_native_abi; then
 		use doc && HTML_DOCS=( "${BUILD_DIR}"/doc/html/. )
 		einstalldocs