[pypy-issue] Issue #2811: ropenssl.py incorrectly assumes presence of comp.h (pypy/pypy)

Dominyk Tiller issues-reply at bitbucket.org
Thu Apr 26 14:04:07 EDT 2018

New issue 2811: ropenssl.py incorrectly assumes presence of comp.h

Dominyk Tiller:

There's an erroneous assumption in `ropenssl.py` that the OpenSSL header `comp.h` will always be available, and consequently when that header isn't available the build can fail:

 File "/private/tmp/pypy-20180426-89170-ltfanb/pypy2-v6.0.0-src/rpython/rtyper/tool/rffi_platform.py", line 844, in configure_external_library
    raise last_error
[translation:ERROR] CompilationError: CompilationError(err="""
	/private/tmp/pypy-20180426-89170-ltfanb/pypy2-v6.0.0-src/usession-release-pypy2.7-v6.0.0-0/platcheck_77.c:87:10: fatal error: 'openssl/comp.h' file not found
	#include <openssl/comp.h>
	1 error generated.

Whilst it is *usually* available, it is perfectly legitimate to build openssl with `no-comp` passed during compile, which apparently disables installing that header entirely. Homebrew, the macOS package manager, has recently switched its OpenSSL formula to build with `no-comp`, which has revealed this issue.

Normally in C you could wrap the header inclusion in something like `#ifndef OPENSSL_NO_COMP` but I'm not sure how to achieve that in Python.

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