sim: warnings: add more flags
We already build cleanly with these.
diff --git a/sim/configure b/sim/configure
index be16fb4..53dfa3d 100755
--- a/sim/configure
+++ b/sim/configure
@@ -15836,12 +15836,15 @@
-Wimplicit-int
-Wincompatible-function-pointer-types
-Wincompatible-pointer-types
+-Wint-conversion
-Wmisleading-indentation
-Wmissing-parameter-type
-Wmissing-prototypes
-Wold-style-declaration
-Wold-style-definition
-Wpointer-sign
+-WWreturn-mismatch
+-Wstrict-prototypes
-Wno-enum-conversion
"
diff --git a/sim/m4/sim_ac_option_warnings.m4 b/sim/m4/sim_ac_option_warnings.m4
index 6e6add6..7bcf9af 100644
--- a/sim/m4/sim_ac_option_warnings.m4
+++ b/sim/m4/sim_ac_option_warnings.m4
@@ -58,12 +58,15 @@
-Wimplicit-int
-Wincompatible-function-pointer-types
-Wincompatible-pointer-types
+-Wint-conversion
-Wmisleading-indentation
-Wmissing-parameter-type
-Wmissing-prototypes
-Wold-style-declaration
-Wold-style-definition
-Wpointer-sign
+-WWreturn-mismatch
+-Wstrict-prototypes
dnl The cgen virtual insn logic involves enum conversions.
dnl Disable until we can figure out how to make this work.
-Wno-enum-conversion
