[PATCH i-g-t] benchmarks/, overlay/, demos/, tools/, tests/: Add optional Werror.

[Marius Vlad <marius.c.vlad@intel.com>]

v2: Initially added Werror by default. Make it optional so it doesn't
break android build and (potential) distros maintaing the package
(Hinted by Damien Lespiau).

--enable-werror will enable -Werror compiler flag.

Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
---
 benchmarks/Makefile.am |  3 ++-
 configure.ac           | 10 ++++++++++
 demos/Makefile.am      |  3 ++-
 overlay/Makefile.am    |  3 ++-
 tests/Makefile.am      |  2 +-
 tools/Makefile.am      |  4 +++-
 6 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/benchmarks/Makefile.am b/benchmarks/Makefile.am
index 2c2d100..49d2f64 100644
--- a/benchmarks/Makefile.am
+++ b/benchmarks/Makefile.am
@@ -2,7 +2,8 @@
 include Makefile.sources
 
 AM_CPPFLAGS = -I$(top_srcdir) -I$(top_srcdir)/lib
-AM_CFLAGS = $(DRM_CFLAGS) $(CWARNFLAGS) $(CAIRO_CFLAGS) $(LIBUNWIND_CFLAGS)
+AM_CFLAGS = $(DRM_CFLAGS) $(CWARNFLAGS) $(CAIRO_CFLAGS) $(LIBUNWIND_CFLAGS) \
+	    $(WERROR_CFLAGS)
 LDADD = $(top_builddir)/lib/libintel_tools.la
 
 benchmarks_LTLIBRARIES = gem_exec_tracer.la
diff --git a/configure.ac b/configure.ac
index 0589782..11b1d46 100644
--- a/configure.ac
+++ b/configure.ac
@@ -229,6 +229,11 @@ AC_ARG_ENABLE(debug,
 			     [Build tests without debug symbols]),
 	      [], [enable_debug=yes])
 
+AC_ARG_ENABLE(werror,
+	      AS_HELP_STRING([--enable-werror],
+			     [Fail on warnings]),
+	      [], [enable_werror=no])
+
 if test "x$enable_debug" = xyes; then
 	AS_COMPILER_FLAG([-g3], [DEBUG_CFLAGS="-g3"], [DEBUG_CFLAGS="-g"])
 	AS_COMPILER_FLAG([-Og], [DEBUG_CFLAGS+=" -Og -Wno-maybe-uninitialized"], # disable maybe-uninitialized due to false positives
@@ -236,6 +241,10 @@ if test "x$enable_debug" = xyes; then
 	AC_SUBST([DEBUG_CFLAGS])
 fi
 
+if test "x$enable_werror" = xyes; then
+	AS_COMPILER_FLAG([-Werror], [WERROR_CFLAGS="-Werror"])
+fi
+
 # prevent relinking the world on every commit for developers
 AC_ARG_ENABLE(git-hash,
 	      AS_HELP_STRING([--disable-git-hash],
@@ -313,6 +322,7 @@ echo "       Overlay            : X: ${enable_overlay_xlib}, Xv: ${enable_overla
 echo "       x86-specific tools : ${build_x86}"
 echo ""
 echo " • API-Documentation      : ${enable_gtk_doc}"
+echo " • Fail on warnings:      : ${enable_werror}"
 echo ""
 
 # vim: set ft=config ts=8 sw=8 tw=0 noet :
diff --git a/demos/Makefile.am b/demos/Makefile.am
index e6fbb3b..f5725f4 100644
--- a/demos/Makefile.am
+++ b/demos/Makefile.am
@@ -3,5 +3,6 @@ bin_PROGRAMS = 				\
 	$(NULL)
 
 AM_CPPFLAGS = -I$(top_srcdir) -I$(top_srcdir)/lib
-AM_CFLAGS = $(DRM_CFLAGS) $(PCIACCESS_CFLAGS) $(CWARNFLAGS) $(CAIRO_CFLAGS) $(LIBUNWIND_CFLAGS)
+AM_CFLAGS = $(DRM_CFLAGS) $(PCIACCESS_CFLAGS) $(CWARNFLAGS) \
+	    $(CAIRO_CFLAGS) $(LIBUNWIND_CFLAGS) $(WERROR_CFLAGS)
 LDADD = $(top_builddir)/lib/libintel_tools.la
diff --git a/overlay/Makefile.am b/overlay/Makefile.am
index c648875..c926557 100644
--- a/overlay/Makefile.am
+++ b/overlay/Makefile.am
@@ -3,7 +3,8 @@ bin_PROGRAMS = intel-gpu-overlay
 endif
 
 AM_CPPFLAGS = -I.
-AM_CFLAGS = $(DRM_CFLAGS) $(PCIACCESS_CFLAGS) $(CWARNFLAGS) $(CAIRO_CFLAGS) $(OVERLAY_CFLAGS)
+AM_CFLAGS = $(DRM_CFLAGS) $(PCIACCESS_CFLAGS) $(CWARNFLAGS) \
+	$(CAIRO_CFLAGS) $(OVERLAY_CFLAGS) $(WERROR_CLFAGS)
 LDADD = $(DRM_LIBS) $(PCIACCESS_LIBS) $(CAIRO_LIBS) $(OVERLAY_LIBS)
 
 intel_gpu_overlay_SOURCES = \
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 45e3359..32b9115 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -59,7 +59,7 @@ AM_CFLAGS = $(DRM_CFLAGS) $(CWARNFLAGS) $(DEBUG_CFLAGS)\
 	-include "$(srcdir)/../lib/check-ndebug.h" \
 	-DIGT_SRCDIR=\""$(abs_srcdir)"\" \
 	-DIGT_DATADIR=\""$(pkgdatadir)"\" \
-	$(LIBUNWIND_CFLAGS) \
+	$(LIBUNWIND_CFLAGS) $(WERROR_CFLAGS) \
 	$(NULL)
 
 LDADD = ../lib/libintel_tools.la $(GLIB_LIBS)
diff --git a/tools/Makefile.am b/tools/Makefile.am
index df48d94..5f45144 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -3,7 +3,9 @@ include Makefile.sources
 SUBDIRS = null_state_gen registers
 
 AM_CPPFLAGS = -I$(top_srcdir) -I$(top_srcdir)/lib
-AM_CFLAGS = $(DEBUG_CFLAGS) $(DRM_CFLAGS) $(PCIACCESS_CFLAGS) $(CWARNFLAGS) $(CAIRO_CFLAGS) $(LIBUNWIND_CFLAGS) -DPKGDATADIR=\"$(pkgdatadir)\"
+AM_CFLAGS = $(DEBUG_CFLAGS) $(DRM_CFLAGS) $(PCIACCESS_CFLAGS) $(CWARNFLAGS) \
+	    $(CAIRO_CFLAGS) $(LIBUNWIND_CFLAGS) -DPKGDATADIR=\"$(pkgdatadir)\" \
+	    $(WERROR_CFLAGS)
 LDADD = $(top_builddir)/lib/libintel_tools.la
 AM_LDFLAGS = -Wl,--as-needed
 
-- 
2.8.0.rc3

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