dev-cpp/muParser: Remove USE=wchar

Unfortunately, this innocent looking USE flag incurs a silent ABI change
that let's all its reverse dependencies fail. A number of the reverse
dependencies of muParser already set muParser[-wchar] explicitly and the
rest is probably also not compiling.

Thus, remove the use flag.

If someone wants to have wchar_t support in muParser then a proper
solution would be to slot the package and install both ABI variants
simultaneously.

Closes: https://bugs.gentoo.org/880133
Signed-off-by: Matthias Maier <tamiko@gentoo.org>

dev-cpp/muParser/metadata.xml

@@ -14,7 +14,4 @@
 		<remote-id type="sourceforge">muparser</remote-id>
 		<remote-id type="github">beltoforion/muparser</remote-id>
 	</upstream>
-	<use>
-		<flag name="wchar">Add support for wide character (wchar_t)</flag>
-	</use>
 </pkgmetadata>

dev-cpp/muParser/muParser-2.3.3-r2.ebuild

@@ -16,7 +16,7 @@ S="${WORKDIR}"/muparser-${PV}
 LICENSE="MIT"
 SLOT="0"
 KEYWORDS="amd64 ~arm arm64 ~loong ~ppc ~ppc64 ~riscv x86 ~amd64-linux ~x86-linux ~ppc-macos"
-IUSE="doc openmp test wchar"
+IUSE="doc openmp test"
 RESTRICT="!test? ( test )"
 
 S="${S}${suffix}"
@@ -24,7 +24,6 @@ S="${S}${suffix}"
 src_configure() {
 	local mycmakeargs=(
 		-DENABLE_OPENMP=$(usex openmp)
-		-DENABLE_WIDE_CHAR=$(usex wchar)
 	)
 	cmake_src_configure
 }

dev-cpp/muParser/muParser-2.3.4-r1.ebuild

@@ -13,13 +13,12 @@ S="${WORKDIR}"/muparser-${PV}
 LICENSE="MIT"
 SLOT="0"
 KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86 ~amd64-linux ~x86-linux ~ppc-macos"
-IUSE="doc openmp test wchar"
+IUSE="doc openmp test"
 RESTRICT="!test? ( test )"
 
 src_configure() {
 	local mycmakeargs=(
 		-DENABLE_OPENMP=$(usex openmp)
-		-DENABLE_WIDE_CHAR=$(usex wchar)
 	)
 	cmake_src_configure
 }