internal-sqlite=1    => {Don't use the internal SQLite, use the system one}
    static=0             => {Link a static executable}
    fusefs=1             => {Disable the Fuse Filesystem}
    fossil-debug=0       => {Build with fossil debugging enabled}
    no-opt=0             => {Build without optimization}
    json=0               => {Build with fossil JSON API enabled}
    with-emsdk:path      => {Directory containing the Emscripten SDK}
    no-compile-commands=0 =>
      "Disable compile_commands.json support even if detected (possibly incorrectly)."
}

# Update the minimum required SQLite version number here, and also
# in src/main.c near the sqlite3_libversion_number() call.  Take care
# that both places agree!
define MINIMUM_SQLITE_VERSION "3.43.0"

  } elseif {[cc-check-function-in-lib fuse_mount fuse]} {
     define-append EXTRA_CFLAGS -DFOSSIL_HAVE_FUSEFS
     define FOSSIL_HAVE_FUSEFS 1
     define-append LIBS -lfuse
     msg-result "FuseFS support enabled"
  }
}

########################################################################
# Checks the compiler for compile_commands.json support. If passed an
# argument it is assumed to be the name of an autosetup boolean config
# option to explicitly DISABLE the compile_commands.json support.
#
# Returns 1 if supported, else 0. Defines MAKE_COMPILATION_DB to "yes"
# if supported, "no" if not.
proc check-compile-commands {{configOpt no-compile-commands}} {
    msg-checking "compile_commands.json support... "
    if {"" ne $configOpt && [opt-bool $configOpt]} {
        msg-result "explicitly disabled"
        define MAKE_COMPILATION_DB no
        return 0
    } else {
        if {[cctest -lang c -cflags {/dev/null -MJ} -source {}]} {
            # This test reportedly incorrectly succeeds on one of
            # Martin G.'s older systems.
            msg-result "compiler supports compile_commands.json"
            define MAKE_COMPILATION_DB yes
            return 1
        } else {
            msg-result "compiler does not support compile_commands.json"
            define MAKE_COMPILATION_DB no
            return 0
        }
    }
}

check-compile-commands

# 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