games-emulation/pcsx2: fix wxwidgets detection, ignore /usr/lib64

PCSX2 tries to force a wx-config path while FindwxWidgets.cmake
would otherwise use the eclass' WX_CONFIG. Results in a build
failure if the wx-config-3.0 symlink points to the gtk2 version.

This previously worked by accident when cmake is in cross-compilation
mode given wx-config32-3.0 doesn't exist and fell back to WX_CONFIG.

Dirty fix but also force-ignore /usr/lib64 like the toolchain file
used to for now, many checks are fragile (e.g. GLU). Ultimately
these workarounds shouldn't be needed next release (64bit).

Thanks-to: Yuri Konotopov <[email protected]>
Bug: https://bugs.gentoo.org/833100
Signed-off-by: Ionen Wolkens <[email protected]>

games-emulation/pcsx2/files/pcsx2-1.6.0-wx-config.patch

@@ -0,0 +1,20 @@
+Don't attempt to use /usr/bin/wx-config-3.0 which can point to the
+wrong wx-config depending on eselect'ed wxGTK profile. Furthermore
+that path does not use ESYSROOT.
+
+If unset, FindwxWidgets.cmake will use WX_CONFIG environment
+set by the wxwidgets eclass.
+--- a/cmake/SearchForStuff.cmake
++++ b/cmake/SearchForStuff.cmake
+@@ -50,4 +50,5 @@
+ # lib32-wx3.0 => /usr/bin/wx-config32-3.0
+ # FindwxWidgets only searches for wx-config.
++#[[
+ if(CMAKE_CROSSCOMPILING)
+     # May need to fix the filenames for lib32-wx3.0.
+@@ -71,4 +72,5 @@
+     endif()
+ endif()
++#]]
+
+ find_package(wxWidgets COMPONENTS base core adv)

games-emulation/pcsx2/pcsx2-1.6.0-r3.ebuild

@@ -46,6 +46,7 @@ FILECAPS=(
 
 PATCHES=(
 	"${FILESDIR}/${P}-disable-setcap.patch"
+	"${FILESDIR}/${P}-wx-config.patch"
 )
 
 pkg_setup() {
@@ -87,6 +88,9 @@ src_configure() {
 		# wxGTK must be built against same sdl version
 		-DSDL2_API=TRUE
 		-DUSE_VTUNE=FALSE
+
+		# mimic old toolchain file behavior (bug #833100 comment #20)
+		-DCMAKE_SYSTEM_IGNORE_PATH="${ESYSROOT}"/usr/lib64
 	)
 
 	setup-wxwidgets