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sim: use -Werror when probing for supported warning flags

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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.
This commit is contained in:
Simon Marchi
2021-04-21 14:51:10 -04:00
committed by Mike Frysinger
parent 7e7a35fbca
commit 1f195bc327
64 changed files with 161 additions and 32 deletions
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4
sim/example-synacor/ChangeLog
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@ -1,3 +1,7 @@
2021-04-21 Simon Marchi <simon.marchi@polymtl.ca>
* configure: Regenerate.
2021-04-18 Mike Frysinger <vapier@gentoo.org>
* configure: Regenerate.

2
sim/example-synacor/configure vendored
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@ -12073,7 +12073,7 @@ $as_echo_n "checking compiler warning flags... " >&6; }
-Werr*) WERROR_CFLAGS=-Werror ;;
*) # Check that GCC accepts it
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $w"
CFLAGS="$CFLAGS -Werror $w"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */