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c, c++: avoid implicit fall-throw

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Reported by Derek Clegg.
http://lists.gnu.org/archive/html/bug-bison/2019-01/msg00004.html

* configure.ac (warn_common): Add -Wimplicit-fallthrough.
This does trigger failures in the test suite.
* data/skeletons/glr.c, data/skeletons/lalr1.cc,
* data/skeletons/yacc.c, tests/c++.at:
Make fall-throws explicit.
This commit is contained in:
Akim Demaille
2019-01-15 07:43:16 +01:00
parent a049509d04
commit ad326ada91
6 changed files with 38 additions and 5 deletions
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3
configure.ac
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@@ -96,7 +96,8 @@ AM_CONDITIONAL([ENABLE_GCC_WARNINGS], [test "$enable_gcc_warnings" = yes])
if test "$enable_gcc_warnings" = yes; then
warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
-fparse-all-comments -Wdocumentation
-Wformat -Wnull-dereference -Wpointer-arith -Wshadow
-Wformat -Wimplicit-fallthrough -Wnull-dereference
-Wpointer-arith -Wshadow
-Wundefined-func-template -Wwrite-strings'
warn_c='-Wbad-function-cast -Wstrict-prototypes'
warn_cxx='-Wextra-semi -Wnoexcept'