configure.ac: added warning to CXXFLAGS: -Wsign-conversion

diff --git a/re2c/configure.ac b/re2c/configure.ac
index be8db2247c6b266e00abb98e618dd594f7082f1e..7e26fa34bca9486800122fc22217ae5e2039bedd 100644 (file)
--- a/re2c/configure.ac
+++ b/re2c/configure.ac
@@ -62,6 +62,7 @@ TRY_CXXFLAG([-Wformat=2])
 TRY_CXXFLAG([-Wredundant-decls])
 TRY_CXXFLAG([-Wsuggest-attribute=format])
 TRY_CXXFLAG([-Wconversion])
+TRY_CXXFLAG([-Wsign-conversion])
 TRY_CXXFLAG([-O2])
 TRY_CXXFLAG([-Weverything])