firebird3: fix build on ppc*-musl

[ci skip]

srcpkgs/firebird3/template

@@ -42,6 +42,13 @@ CFLAGS="-fno-strict-aliasing"
 CXXFLAGS="-fno-delete-null-pointer-checks"
 
 pre_configure() {
+	# musl does not have gcrt1.o needed for -p
+	case "$XBPS_TARGET_MACHINE" in
+		ppc*-musl)
+			sed -i '/FLAGS=/s/ \-p / /g' builds/posix/prefix.linux_powerpc*
+			;;
+	esac
+
 	# Avoid errors telling we are not 'root' and
 	# do not change ownership to root:root and
 	# do not change permissions to read-only