libopenal: fix armv6*

Inlining of gcc6 arm_neon.h functions fails because they are called
indirectly, which isn't allowed for always_inline functions.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63220

As a workaround, make the arm_neon.h detection fail for armv6*

srcpkgs/libopenal/template

@@ -1,7 +1,7 @@
 # Template file for 'libopenal'
 pkgname=libopenal
 version=1.17.2
-revision=3
+revision=4
 build_style=cmake
 wrksrc="openal-soft-${version}"
 hostmakedepends="pkg-config"
@@ -13,6 +13,14 @@ homepage="http://kcat.strangesoft.net/openal.html"
 distfiles="http://kcat.strangesoft.net/openal-releases/openal-soft-${version}.tar.bz2"
 checksum=a341f8542f1f0b8c65241a17da13d073f18ec06658e1a1606a8ecc8bbc2b3314
 
+pre_configure() {
+	case "$XBPS_TARGET_MACHINE" in
+	armv6*)	# Hack to not compile (broken) arm_neon.h inlining of indirect function calls
+		sed -i CMakeLists.txt -e"s;arm_neon.h;arm_neon.xxx;"
+		;;
+	esac
+}
+
 post_install() {
 	rm -f ${DESTDIR}/usr/share/openal/alsoftrc.sample
 	vsconf alsoftrc.sample