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authorNeels Hofmeyr <neels@hofmeyr.de>2018-03-05 19:46:44 +0100
committerNeels Hofmeyr <neels@hofmeyr.de>2018-03-05 20:40:21 +0100
commit6e152f258226ddc5233fbb8c4f9e222fc90a161d (patch)
tree5a4b56e307cd888e968878125ff861bfc3fcea31
parentbd2173796d90db181c22034e4acbe391d2cb57ce (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: Ibcc8238584a585434b39a046cd2d7e18ddaf7f8c
-rw-r--r--configure.ac21
1 files changed, 21 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 4d65c2f..1610973 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,6 +29,24 @@ 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 $WERROR_FLAGS"
+fi
+
# The following test is taken from WebKit's webkit.m4
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fvisibility=hidden "
@@ -44,6 +62,9 @@ AC_ARG_ENABLE([debug], [AS_HELP_STRING([--enable-debug], [Buld the library with
[build_debug="$enableval"], [build_debug="no"])
AM_CONDITIONAL(BUILD_DEBUG, test "x$build_debug" = "xyes")
+AC_MSG_RESULT([CFLAGS="$CFLAGS"])
+AC_MSG_RESULT([CPPFLAGS="$CPPFLAGS"])
+
AC_OUTPUT(
libasn1c.pc
src/Makefile