Bug #1297 » lttng-tools-remove_hardcoding_compiler_warning_flags.patch
| configure.ac~ 2021-02-23 03:14:29.000000000 +0000 → configure.ac 2021-02-24 01:06:07.269505219 +0000 | ||
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RW_PROG_CXX_WORKS
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AM_CONDITIONAL([CXX_WORKS], [test "x$rw_cv_prog_cxx_works" = "xyes"])
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# Detect warning flags supported by the compiler, append them to WARN_CFLAGS.
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#
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# Pass -Werror as an extra flag during the test: this is needed to make the
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# -Wunknown-warning-option diagnostic fatal with clang.
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AX_APPEND_COMPILE_FLAGS([ dnl
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-Wall dnl
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dnl We currently get this warning when building with Clang:
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dnl
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dnl /usr/include/setjmp.h:54:12: error: declaration of built-in function '__sigsetjmp' requires the declaration of the 'jmp_buf' type, commonly provided in the header <setjmp.h>. [-Werror,-Wincomplete-setjmp-declaration]
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dnl extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) __THROWNL;
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dnl ^
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-Wno-incomplete-setjmp-declaration dnl
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-Wdiscarded-qualifiers dnl
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-Wmissing-declarations dnl
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-Wmissing-prototypes dnl
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-Wmissing-parameter-type dnl
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-Wold-style-definition dnl
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-Wstrict-prototypes dnl
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],
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[WARN_CFLAGS],
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[-Werror])
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# When given, add -Werror to WARN_CFLAGS.
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AC_ARG_ENABLE([Werror],
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[AS_HELP_STRING([--enable-Werror], [Treat compiler warnings as errors.])]
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