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| author | fanquake <fanquake@gmail.com> | 2019-12-21 21:00:52 -0500 |
|---|---|---|
| committer | fanquake <fanquake@gmail.com> | 2020-01-06 09:02:01 +0800 |
| commit | b0a254019c3bc8a353c1304ee65a55cfb3d4ecac (patch) | |
| tree | ea52dc3bc4da0c9bf1aecd16b29b6a128e0b48fb | |
| parent | b949ac9697a6cfe087f60a16c063ab9c5bf1e81f (diff) | |
build: add Wdate-time to Werror flags
-Wdate-time
Warn when macros __TIME__, __DATE__ or __TIMESTAMP__ are encountered as
they might prevent bit-wise-identical reproducible compilations.
This is supported by GCC and Clang.
https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
https://clang.llvm.org/docs/DiagnosticsReference.html#wdate-time
| -rw-r--r-- | configure.ac | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 875491fb99..888f67cc87 100644 --- a/configure.ac +++ b/configure.ac @@ -329,6 +329,7 @@ if test "x$enable_werror" = "xyes"; then AX_CHECK_COMPILE_FLAG([-Werror=switch],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=switch"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Werror=thread-safety-analysis],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=thread-safety-analysis"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Werror=unused-variable],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=unused-variable"],,[[$CXXFLAG_WERROR]]) + AX_CHECK_COMPILE_FLAG([-Werror=date-time],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=date-time"],,[[$CXXFLAG_WERROR]]) fi if test "x$CXXFLAGS_overridden" = "xno"; then @@ -342,6 +343,7 @@ if test "x$CXXFLAGS_overridden" = "xno"; then AX_CHECK_COMPILE_FLAG([-Wrange-loop-analysis],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wrange-loop-analysis"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Wredundant-decls],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wredundant-decls"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Wunused-variable],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wunused-variable"],,[[$CXXFLAG_WERROR]]) + AX_CHECK_COMPILE_FLAG([-Wdate-time],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wdate-time"],,[[$CXXFLAG_WERROR]]) dnl Some compilers (gcc) ignore unknown -Wno-* options, but warn about all dnl unknown options if any other warning is produced. Test the -Wfoo case, and |