From 229c4c6a71ce6540917cbc10629d8f51c98c7e7b Mon Sep 17 00:00:00 2001 From: "R. Diez" Date: Thu, 13 May 2021 14:19:13 +0200 Subject: [PATCH] Warn on undefined preprocessor symbols Preprocessor directives like "#if SYMBOL" silently replace undefined or misspelt symbols with 0, which makes configuration bugs hard to spot. Compiler flag "-Wundef" prevents such errors. Change-Id: I91b7ba2db02ef0c3c452d334601c53aebda4660e Signed-off-by: R. Diez Reviewed-on: http://openocd.zylin.com/6238 Tested-by: jenkins Reviewed-by: Antonio Borneo --- configure.ac | 2 ++ 1 file changed, 2 insertions(+) diff --git a/configure.ac b/configure.ac index e343875d8..139598e15 100644 --- a/configure.ac +++ b/configure.ac @@ -637,6 +637,7 @@ m4_define([PROCESS_ADAPTERS], [ AC_MSG_ERROR([$3 is required for the ADAPTER_DESC([adapter])]) ]) ADAPTER_VAR([adapter])=no + AC_DEFINE([BUILD_]ADAPTER_SYM([adapter]), [0], [0 if you do not want the ]ADAPTER_DESC([adapter]).) ]) AM_CONDITIONAL(ADAPTER_SYM([adapter]), [test "x$ADAPTER_VAR([adapter])" != "xno"]) ]) @@ -756,6 +757,7 @@ AS_IF([test "x${gcc_wextra}" = "xyes"], [ GCC_WARNINGS="${GCC_WARNINGS} -Wcast-align" GCC_WARNINGS="${GCC_WARNINGS} -Wredundant-decls" GCC_WARNINGS="${GCC_WARNINGS} -Wpointer-arith" + GCC_WARNINGS="${GCC_WARNINGS} -Wundef" ]) AS_IF([test "x${gcc_werror}" = "xyes"], [ GCC_WARNINGS="${GCC_WARNINGS} -Werror" -- 2.39.5