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autogen.sh: CFLAGS: Add some -Werror=... flags that will be default soon

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Clang 16 and GCC 14 have upgraded several warnings to errors by default.
Also, there are new warnings that will be requirements of ISO C23.  Add
all of those to our build.

Use Clang's -Wno-unknown-attribute-option, to ignore warnings that are
exclusive of GCC.  Sadly, GCC doesn't have such an option.

Link: <https://wiki.gentoo.org/wiki/Modern_C_porting#What_changed.3F>
Link: <https://github.com/shadow-maint/shadow/issues/922>
Suggested-by: Sam James <sam@gentoo.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
This commit is contained in:
Alejandro Colomar 2024-01-22 22:25:34 +01:00 committed by Iker Pedrosa
parent d452d1b812
commit d74ffd3c29
1 changed files with 4 additions and 0 deletions
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autogen.sh
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@ -6,7 +6,11 @@ CFLAGS="-O2"
CFLAGS="$CFLAGS -Wall"
CFLAGS="$CFLAGS -Wextra"
CFLAGS="$CFLAGS -Werror=implicit-function-declaration"
CFLAGS="$CFLAGS -Werror=implicit-int"
CFLAGS="$CFLAGS -Werror=incompatible-pointer-types"
CFLAGS="$CFLAGS -Werror=int-conversion"
CFLAGS="$CFLAGS -Wno-expansion-to-defined"
CFLAGS="$CFLAGS -Wno-unknown-warning-option"
"$(dirname "$0")"/configure \
CFLAGS="$CFLAGS" \