games-emulation/snes9x: Fix broken build system

Closes: https://bugs.gentoo.org/645330
Package-Manager: Portage-2.3.19, Repoman-2.3.6

games-emulation/snes9x/files/snes9x-1.55-build-system.patch

@@ -0,0 +1,63 @@
+--- a/gtk/configure.ac
++++ b/gtk/configure.ac
+@@ -33,7 +33,7 @@
+
+ AM_GLIB_GNU_GETTEXT
+
+-snes9xlocaledir='${prefix}/${DATADIRNAME}/locale'
++snes9xlocaledir='$(localedir)'
+ AC_SUBST(snes9xlocaledir)
+
+ AC_ARG_WITH(debug,
+--- a/unix/configure.ac
++++ b/unix/configure.ac
+@@ -56,49 +56,6 @@
+ # *** Execution begins here ***
+ # *****************************
+
+-# Remove -g and -O2 flags manually.
+-
+-if test "x$CFLAGS" != "x"; then
+-	CFLAGS="`echo \"$CFLAGS\" | sed -e 's/-g//'`"
+-	CFLAGS="`echo \"$CFLAGS\" | sed -e 's/-O2//'`"
+-fi
+-
+-if test "x$CXXFLAGS" != "x"; then
+-	CXXFLAGS="`echo \"$CXXFLAGS\" | sed -e 's/-g//'`"
+-	CXXFLAGS="`echo \"$CXXFLAGS\" | sed -e 's/-O2//'`"
+-fi
+-
+-# Test what compiler flags we should use.
+-
+-AC_ARG_ENABLE([debug],
+-	[AS_HELP_STRING([--enable-debug],
+-		[leave debug information in the final binary (default: no)])],
+-	[], [enable_debug="no"])
+-
+-if test "x$enable_debug" = "xyes"; then
+-	AC_S9X_COMPILER_FLAG([-g],  [g])
+-	AC_S9X_COMPILER_FLAG([-O0], [o0])
+-else
+-	AC_S9X_COMPILER_FLAG([-O3], [o3], [
+-		AC_S9X_COMPILER_FLAG([-O2], [o2], [
+-			AC_S9X_COMPILER_FLAG([-O1], [o1])])])
+-	AC_S9X_COMPILER_FLAG([-fomit-frame-pointer], [omit_frame_pointer])
+-fi
+-
+-AC_ARG_ENABLE([mtune],
+-	[AS_HELP_STRING([--enable-mtune],
+-		[use the specified value for the -mtune/-mcpu flag (default: no)])],
+-	[], [enable_mtune="no"])
+-
+-if test "x$enable_mtune" != "xno"; then
+-	AC_S9X_COMPILER_FLAG([-mtune="$enable_mtune"], [mtune],
+-	[
+-		AC_MSG_WARN([-mtune failed, trying -mcpu...])
+-		AC_S9X_COMPILER_FLAG([-mcpu="$enable_mtune"], [mcpu],
+-			[AC_MSG_ERROR([Please specify a working value for --enable-mtune.])])
+-	])
+-fi
+-
+ AC_S9X_COMPILER_FLAG([-fno-exceptions],       [no_exceptions])
+ AC_S9X_COMPILER_FLAG([-fno-rtti],             [no_rtti])
+ AC_S9X_COMPILER_FLAG([-pedantic],             [pedantic])

games-emulation/snes9x/snes9x-1.55.ebuild

@@ -40,7 +40,10 @@ DEPEND="${RDEPEND}
 
 S="${WORKDIR}/${P}/unix"
 
-PATCHES=( "${FILESDIR}"/${PN}-1.53-cross-compile.patch )
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.53-cross-compile.patch
+	"${FILESDIR}"/${PN}-1.55-build-system.patch
+)
 
 src_prepare() {
 	cd "${WORKDIR}"/${P} || die