From 1f195bc327c5760d34fa571a758496900b48456c Mon Sep 17 00:00:00 2001 From: Simon Marchi Date: Wed, 21 Apr 2021 14:51:10 -0400 Subject: sim: use -Werror when probing for supported warning flags When building with clang, we get: error: unknown warning option '-Wmissing-parameter-type' [-Werror,-Wunknown-warning-option] This is because clang only warns by default when encountering an unknown warning option, and the probe for supported warning flags is done without -Werror. All flags are therefore accepted by configure, but then it breaks when actually compiling a source file with -Werror. This is equivalent to this commit in gdb: 3e019bdc20eb81b91ab5bc774386201b874c0bac gdb: Use -Werror when checking for (un)supported warning flags We then see some other compilation errors when building with clang and -Werror, they can be dealt with later. --- sim/m4/sim_ac_option_warnings.m4 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sim/m4') diff --git a/sim/m4/sim_ac_option_warnings.m4 b/sim/m4/sim_ac_option_warnings.m4 index dc98370..c831fa8 100644 --- a/sim/m4/sim_ac_option_warnings.m4 +++ b/sim/m4/sim_ac_option_warnings.m4 @@ -91,7 +91,7 @@ then -Werr*) WERROR_CFLAGS=-Werror ;; *) # Check that GCC accepts it saved_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $w" + CFLAGS="$CFLAGS -Werror $w" AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",) CFLAGS="$saved_CFLAGS" esac -- cgit v1.1