Fix libvgz build error on gcc7

This adds -Wno-implicit-fallthrough for libvgz to satisfy gcc7. The -Wno-unknown-warning-option is there to satisfy older gcc/clang that don't recognize -Wno-implicit-fallthrough.

Fix libvgz build error on gcc7
This adds -Wno-implicit-fallthrough for libvgz to satisfy gcc7. The -Wno-unknown-warning-option is there to satisfy older gcc/clang that don't recognize -Wno-implicit-fallthrough.
505373ad · Dag Haavi Finstad · Dridi Boukelmoune · 3ada3052 · 505373ad
Commit 505373ad authored Sep 24, 2018 by Dag Haavi Finstad Committed by Dridi Boukelmoune Oct 16, 2018
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configure.ac configure.ac +5 -0

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--- a/configure.ac
+++ b/configure.ac
@@ -261,6 +261,11 @@ if test "$ac_cv_have_viz" = no; then
 fi
 CFLAGS="${save_CFLAGS}"

+if test "x$GCC" = "xyes"; then
+	libvgz_extra_cflags="${libvgz_extra_cflags} -Wno-unknown-warning-option -Wno-implicit-fallthrough"
+	AC_SUBST(libvgz_extra_cflags)
+fi
+
 SAN_CFLAGS=
 SAN_LDFLAGS=
 UBSAN_CFLAGS=