build: add --enable-werror option
This turns some compiler warnings into errors. Useful for c-i.
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205830a37b
2 changed files with 18 additions and 1 deletions
17
configure.ac
17
configure.ac
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@ -192,6 +192,13 @@ AC_ARG_ENABLE([debug],
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[enable_debug=$enableval],
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[enable_debug=no])
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# Turn warnings into errors
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AC_ARG_ENABLE([werror],
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[AS_HELP_STRING([--enable-werror],
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[Treat certain compiler warnings as errors (default is no)])],
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[enable_werror=$enableval],
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[enable_werror=no])
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AC_LANG_PUSH([C++])
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AX_CHECK_COMPILE_FLAG([-Werror],[CXXFLAG_WERROR="-Werror"],[CXXFLAG_WERROR=""])
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@ -206,6 +213,14 @@ if test "x$enable_debug" = xyes; then
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fi
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fi
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ERROR_CXXFLAGS=
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if test "x$enable_werror" = "xyes"; then
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if test "x$CXXFLAG_WERROR" = "x"; then
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AC_MSG_ERROR("enable-werror set but -Werror is not usable")
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fi
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AX_CHECK_COMPILE_FLAG([-Werror=vla],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=vla"],,[[$CXXFLAG_WERROR]])
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fi
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if test "x$CXXFLAGS_overridden" = "xno"; then
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AX_CHECK_COMPILE_FLAG([-Wall],[CXXFLAGS="$CXXFLAGS -Wall"],,[[$CXXFLAG_WERROR]])
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AX_CHECK_COMPILE_FLAG([-Wextra],[CXXFLAGS="$CXXFLAGS -Wextra"],,[[$CXXFLAG_WERROR]])
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@ -1067,6 +1082,7 @@ AC_SUBST(BITCOIN_CLI_NAME)
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AC_SUBST(BITCOIN_TX_NAME)
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AC_SUBST(RELDFLAGS)
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AC_SUBST(ERROR_CXXFLAGS)
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AC_SUBST(HARDENED_CXXFLAGS)
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AC_SUBST(HARDENED_CPPFLAGS)
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AC_SUBST(HARDENED_LDFLAGS)
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@ -1156,6 +1172,7 @@ echo " with test = $use_tests"
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echo " with bench = $use_bench"
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echo " with upnp = $use_upnp"
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echo " debug enabled = $enable_debug"
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echo " werror = $enable_werror"
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echo
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echo " target os = $TARGET_OS"
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echo " build os = $BUILD_OS"
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@ -5,7 +5,7 @@
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DIST_SUBDIRS = secp256k1 univalue
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AM_LDFLAGS = $(PTHREAD_CFLAGS) $(LIBTOOL_LDFLAGS) $(HARDENED_LDFLAGS)
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AM_CXXFLAGS = $(HARDENED_CXXFLAGS)
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AM_CXXFLAGS = $(HARDENED_CXXFLAGS) $(ERROR_CXXFLAGS)
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AM_CPPFLAGS = $(HARDENED_CPPFLAGS)
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EXTRA_LIBRARIES =
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