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authorNeels Hofmeyr <neels@hofmeyr.de>2018-03-05 20:42:45 +0100
committerNeels Hofmeyr <neels@hofmeyr.de>2018-03-05 20:42:45 +0100
commitfc8357a2db96a89c8e12588d370dd7e8b1d14ac8 (patch)
tree84896074ca2744666e654509cbe3e6d882532b84
parent3e443ca502f82b7c2ce453143866e5f2ed82a91f (diff)
configure: add --enable-werror
Provide a sane means of adding the -Werror compiler flag. Currently, some of our jenkins.sh add -Werror by passing 'CFLAGS="-Werror"', but that actually *overwrites* all the other CFLAGS we might want to have set. Maintain these exceptions from -Werror: a) deprecation (allow upstream to mark deprecation without breaking builds); b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds) As a last configure step before generating the output files, print the complete CFLAGS and CPPFLAGS by means of AC_MSG_RESULT. Change-Id: Ifcde5a110cbed0eaa250dd946927e3b0f4f9bd13
-rw-r--r--configure.ac21
1 files changed, 21 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 1193e46..b9073e9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -151,6 +151,27 @@ then
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"$werror" = x"yes"
+then
+ WERROR_FLAGS="-Werror"
+ WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
+ WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
+ CFLAGS="$CFLAGS $WERROR_FLAGS"
+ CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
+fi
+
+AC_MSG_RESULT([CFLAGS="$CFLAGS"])
+AC_MSG_RESULT([CPPFLAGS="$CPPFLAGS"])
+
AC_CONFIG_FILES([Makefile
doc/Makefile
doc/examples/Makefile