Re: openssh build failure on High Sierra (10.13.2)

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On Fri, 19 Jan 2018, Zube wrote:

> Back in January/March of 2017, it was the case that building openssh
> with the latest openssl on MacOS 10.12.x (Sierra) was a bit of
> a bother.
> 
> I could build everything with Xcode, but the resulting sshd segfaulted
> upon invocation (see the archives).  So I built gcc 6.3 and used that
> to build openssh 7.x on Sierra.  As long as machines stayed on 10.12.x,
> all was fine.
> 
> Under High Sierra, the Xcode behavior is the same, but the old gcc
> 6.3 compiler or a newly-built-under-High-Sierra gcc 6.4 fails to
> build openssh 7.6p1 (or the latest SNAP) with:
> 
> /usr/local/gcc-6.3.0/bin/gcc -g -O2 -pipe -Wall
> -Wpointer-arith -Wuninitialized -Wsign-compare -Wformat-security
> -Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result
> -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -ftrapv -fno-builtin-memset
> -fstack-protector-strong   -I. -I. -I/usr/local/sshssl102n/include
> -DSSHDIR=\"/usr/local/ssh/etc\"
> -D_PATH_SSH_PROGRAM=\"/usr/local/ssh/bin/ssh\"
> -D_PATH_SSH_ASKPASS_DEFAULT=\"/usr/local/ssh/libexec/ssh-askpass\"
> -D_PATH_SFTP_SERVER=\"/usr/local/ssh/libexec/sftp-server\"
> -D_PATH_SSH_KEY_SIGN=\"/usr/local/ssh/libexec/ssh-keysign\"
> -D_PATH_SSH_PKCS11_HELPER=\"/usr/local/ssh/libexec/ssh-pkcs11-helper\"
> -D_PATH_SSH_PIDDIR=\"/var/run\"
> -D_PATH_PRIVSEP_CHROOT_DIR=\"/var/empty\" -DHAVE_CONFIG_H -c log.c
> -o log.o In file included from /usr/include/sys/cdefs.h:587:0,
>                  from /usr/include/sys/types.h:75, from includes.h:25,
>                  from log.c:37:
> /usr/include/sys/syslog.h:227:124: error: expected ',' or ';' before
> '__asm'
>  void syslog(int, const char *, ...) __printflike(2, 3)
>  __not_tail_called __DARWIN_ALIAS_STARTING(__MAC_10_13, __IPHONE_NA,
>  __DARWIN_EXTSN(syslog));
> 
> The corresponding bits from syslog.h are [lines wrapped]
> 
> #if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) &&
> __DARWIN_C_LEVEL >= __DARWIN_C_FULL
> 
> void    syslog(int, const char *, ...) __printflike(2, 3)
> __not_tail_called __DARWIN_ALIAS_STARTING(__MAC_10_13, __IPHONE_NA,
> __DARWIN_EXTSN(syslog));
> 
> #else
> void    syslog(int, const char *, ...) __printflike(2, 3) __not_tail_called;
> #endif

It looks like sys/types.h isn't pulling in some Apple-private
preprocessor defines that it expects and is consequently choking.
This could be a bad installation of the build tools or a bug in
Apple's headers themselves.

You could try grepping /usr/include for the definition of
__DARWIN_ALIAS_STARTING to see where that is and seeing if including
the file where it lives near the top on includes.h fixes it.

(I don't have a High Sierra host, so can't help directly - sorry)

-d
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