trxcon: configure.ac: add --enable-werror

Change-Id: Id9b561f59599e5eb0267e3baaa33bf9cdde22ea3
---
M src/host/trxcon/configure.ac
1 file changed, 22 insertions(+), 0 deletions(-)


git pull ssh://gerrit.osmocom.org:29418/osmocom-bb refs/changes/12/30012/1

diff --git a/src/host/trxcon/configure.ac b/src/host/trxcon/configure.ac
index 46991a2..554caab 100644
--- a/src/host/trxcon/configure.ac
+++ b/src/host/trxcon/configure.ac
@@ -32,6 +32,28 @@
 	CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
 fi
 
+AC_ARG_ENABLE(werror,
+	[AS_HELP_STRING(
+		[--enable-werror],
+		[Turn all compiler warnings into errors, with exceptions:
+		 a) deprecation (allow upstream to mark deprecation without breaking builds);
+		 b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds)
+		]
+	)],
+	[werror=$enableval], [werror="no"])
+if test x"$werror" = x"yes"
+then
+	WERROR_FLAGS="-Werror"
+	WERROR_FLAGS+=" -Werror=implicit-int -Werror=int-conversion -Werror=old-style-definition"
+	WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
+	WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
+	CFLAGS="$CFLAGS $WERROR_FLAGS"
+	CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
+fi
+
+AC_MSG_RESULT([CFLAGS="$CFLAGS"])
+AC_MSG_RESULT([CPPFLAGS="$CPPFLAGS"])
+
 dnl Checks for typedefs, structures and compiler characteristics
 
 AC_CONFIG_MACRO_DIRS([m4])

