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configure: fix -Wimplicit-fallthrough check

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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2018-09-28 13:29:58 +02:00
parent 56e28f9258
commit c73fbad129
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2 changed files with 3 additions and 5 deletions
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2
configure.ac
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@ -684,7 +684,7 @@ AC_PROG_SED
LXC_CHECK_TLS
AX_CHECK_COMPILE_FLAG([-fdiagnostics-color], [CFLAGS="$CFLAGS -fdiagnostics-color"],,[-Werror])
AX_CHECK_COMPILE_FLAG([-implicit-fallthrough], [CFLAGS="$CFLAGS -Wimplicit-fallthrough"],,[-Werror])
AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough], [CFLAGS="$CFLAGS -Wimplicit-fallthrough"],,[-Werror])
AX_CHECK_COMPILE_FLAG([-Wcast-align], [CFLAGS="$CFLAGS -Wcast-align"],,[-Werror])
AX_CHECK_COMPILE_FLAG([-Wstrict-prototypes], [CFLAGS="$CFLAGS -Wstrict-prototypes"],,[-Werror])

6
src/lxc/compiler.h
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@ -37,10 +37,8 @@
#endif
#endif
#if defined(__GNUC__) && __GNUC__ >= 7 || defined(__clang__)
#define __fallthrough __attribute__((fallthrough))
#else
#define __fallthrough
#ifndef __fallthrough
#define __fallthrough /* fall through */
#endif
#ifndef __noreturn