Differences From Artifact [66843eb468]:

• File auto.def — part of check-in [7907b6ffae] at 2019-08-20 01:34:03 on branch configure-updates — Added --with-sanitizer configure-time option for appending -fsanitize=VALUE to CFLAGS and LDFLAGS, plus automatic detection of -lubsan for GCC, which doesn't automatically link to that with -fsanitize=undefined as Clang does. EDIT: This check-in breaks the built on Ubuntu 18.04. (user: wyoung size: 22107)

To Artifact [cd0b3f9a15]:

• File auto.def — part of check-in [66fdab7605] at 2019-08-20 04:24:43 on branch configure-updates — Fixed a couple of Tcl syntax fixes that caused the new --with-sanitizer code to a) run unconditionally irrespective of the option's setting and b) to check for the existence of libubsan whether it was actually needed or not. (user: wyoung size: 22114) [more...]

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  }
}

# Add -fsanitize compile and link options late: we don't want the C
# checks above to run with those sanitizers enabled.  It can not only
# be pointless, it can actually break correct tests.
set fsan [opt-val with-sanitizer]
if {[string length fsan]} {
    define-append  EXTRA_CFLAGS -fsanitize=$fsan
    define-append EXTRA_LDFLAGS -fsanitize=$fsan
    if {[string first "undefined" $fsan]} {
        # We need to link with libubsan if we're compiling under
        # GCC with -fsanitize=undefined.
        cc-check-function-in-lib __ubsan_handle_add_overflow ubsan
    }
}

# Finally, append -ldl to make sure it's the last in the list.

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  }
}

# Add -fsanitize compile and link options late: we don't want the C
# checks above to run with those sanitizers enabled.  It can not only
# be pointless, it can actually break correct tests.
set fsan [opt-val with-sanitizer]
if {[string length $fsan]} {
    define-append  EXTRA_CFLAGS -fsanitize=$fsan
    define-append EXTRA_LDFLAGS -fsanitize=$fsan
    if {[string first "undefined" $fsan] != -1} {
        # We need to link with libubsan if we're compiling under
        # GCC with -fsanitize=undefined.
        cc-check-function-in-lib __ubsan_handle_add_overflow ubsan
    }
}

# Finally, append -ldl to make sure it's the last in the list.