expat @2.2.2: compilation fails on Mac OS X 10.6 / lib/xmlparse.c high quality entropy

[rossduncan]

Trying to update expat -- or rather, something else that requires expat -- but it repeatedly fails while building expat. Looking in the log, the following looks like the most likely culprit:

:info:build lib/xmlparse.c:56:3: error: #error You do not have support for any sources of high quality entropy enabled. For end user security, that is probably not what you want. Your options include: * Linux + glibc >=2.25 (getrandom): HAVE_GETRANDOM, * Linux + glibc <2.25 (syscall SYS_getrandom): HAVE_SYSCALL_GETRANDOM, * BSD / macOS (arc4random_buf): HAVE_ARC4RANDOM_BUF, * libbsd (arc4random_buf): HAVE_ARC4RANDOM_BUF + HAVE_LIBBSD, * Windows (RtlGenRandom): _WIN32. If insist on not using any of these, bypass this error by defining XML_POOR_ENTROPY; you have been warned. For CMake, one way to pass the define is: cmake -DCMAKE_C_FLAGS="-pipe -O2 -DHAVE_SYSCALL_GETRANDOM" . If you have reaso
ns to patch this detection code away or need changes to the build system, please open a bug. Thank you!

I don't care about having high quality entropy. I just want to build the (other) thing I want to build. (Why does an XML Parser care about this anyway?!)

[rossduncan]

log

[ryandesign (Ryan Carsten Schmidt)]

This should have already been dealt with a couple days ago by [b2b6b1e03b126df77195029670197b7ce1396f32/macports-ports]. See #54474. Please verify that you've run sudo port selfupdate.

[ryandesign (Ryan Carsten Schmidt)]

It looks like the files on our rsync server are stale and did not include this expat fix. I've kicked off the process that should refresh them again. It takes a couple hours to run. Please try sudo port selfupdate again after that.

[gnw3]

To check that you have the updated Portfile, run "less $(port file expat)" and look for the block:

if {${os.platform} eq "darwin" && [vercmp ${macosx_deployment_target} 10.7] < 0 && [vercmp ${version} 2.2.2] == 0} {
    # expat 2.2.2 complains if arc4random_buf, introduced in OS X 10.7, is not available.
    # https://github.com/libexpat/libexpat/issues/81
    # Silence the complaint:
    configure.cppflags-append -DXML_POOR_ENTROPY
}

[rossduncan]

Thanks for dealing with this so quickly. Unfortunately it still doesn't work.

I have updated ports, and checked the block you asked for is there. Then I cleaned expat, but when I try to install -- either using "install" or "upgrade outdated", it fails at the configuration stage for expat.

In the log (attached) there are lot of (syntax?) errors for conftest.c, I don't know which of these is the real problem.

[rossduncan]

log file from failure during configuration.

[kencu (Ken)]

This gawk issue is a bit of a PITA, see comment:ticket:54321:1 and ProblemHotlist#ncurses6