README revision 1.19 
1$NetBSD: README,v 1.19 2021/06/29 10:02:34 cjep Exp $
2
3Special notes for cross-hosting a NetBSD build on certain platforms.  
4Only those platforms which have been tested to complete a "build.sh" run
5are listed.
6
7All hosts must have a POSIX compatible sh. /bin/sh is assumed unless 
8otherwise set. This can be overridden by setting HOST_SH in the environment.
9
10In addition all hosts must provide the following local tools:
11  gzip
12  gcc
13  g++
14  zlib and headers (this requirement may be dropped in future)
15
16FreeBSD
17-------
18
19build.sh was recently tested on:
20* FreeBSD 13 (amd64, aarch64) 
21* FreeBSD 12.2 (amd64, aarch64)
22* FreeBSD 11.4 (amd64)
23* FreeBSD 10.4 (amd64)
24
25Linux
26-----
27
28build.sh has been tested on:
29* Amazon Linux 2 (x86)
30* Debian 10 (x86, aarch64)
31* Red Hat Enterprise Linux 8 (x86, aarch64)
32* SUSE Enterprise Server 15 (x86)
33* Ubuntu Server 20.04 (x86, aarch64)
34* Ubuntu Server 18.04 (x86)
35
36* The gcc and g++ package must be installed, along with the typical system 
37  development packages (glibc-devel, etc.). The g++ package is sometimes 
38  called gcc-c++.
39
40* The ncurses-devel package must be installed (for nbinfo).
41
42* The zlib and zlib-devel packages must be installed (these are
43  called zlib1g and zlib1g-dev on Debian and Ubuntu Linux)
44
45* There is a known build problem on Linux/aarch64 with glibc <2.28
46
47macOS/Darwin
48------------
49
50build.sh was recently tested on:
51* macOS Big Sur (x86)
52* macOS Catalina
53* macOS High Sierra
54
55with up to date Xcode command line tools and APFS filesystems. 
56Previously, there have been issues building on case-insensitive 
57HFS filesystems. build.sh is not working yet on M1-based Macs.
58
59HP-UX
60-----
61
62* zlib must be available.
63
64OpenBSD
65-------
66
67As of -current 20210629, ./build.sh will build src on OpenBSD 6.9
68for some platforms. Known problems:
69* MIPS targets do not currently build. 
70* The LLVM RT library will not build and consequently nor will X on 
71  amd64 and i386.
72
73NetBSD (earlier releases)
74-------------------------
75
76* Tested on NetBSD 1.5.2 (machine-independently).
77* Should need no special setup.
78* _NETBSD_SOURCE is *not* to be defined/pulled in during compat/tools builds.
79  compat_defs.h will error out if it finds it defined. 
80
81Solaris
82-------
83
84(updated instruction for Solaris 11 further below)
85
86* Tested on Solaris/x86 8 (5.8) with gcc 2.95.2 and Solaris/sparc 8 (5.8)
87  with gcc 3.2 (not yet tested with SUNWspro).
88
89* $HOST_CC needs to be set properly (for gcc, it should be set to "gcc",
90  otherwise the improper /usr/ucb/cc may be invoked by accident).
91
92* The SUNWzlib package (or a built version of zlib visible to $HOST_CC,
93  such as SMCzlib from sunfreeware.com) must be installed.  This will be
94  fixed in the future to include zlib in libnbcompat.
95
96* Needs the following paths, in this order, in $PATH:
97
98      /usr/xpg4/bin
99      /usr/ccs/bin
100      <path to host C and C++ compilers>
101      /usr/bin
102
103  /usr/ucb may optionally be placed before /usr/bin, per your preference,
104  but /usr/ucb *MUST NOT* be before /usr/ccs/bin or before the path to
105  the host C and C++ compilers.
106
107Solaris 11:
108
109* Solaris 11.3
110 * Set PATH to /usr/xpg6/bin:/usr/xpg4/bin:/usr/bin
111 * Set HOST_CC to /usr/bin/gcc
112
113* Solaris 11.4
114 * Install gcc-5 since the default installed gcc-7 has issues when compiling 
115   toolchain version of groff (hypot())
116 * Set PATH to /usr/xpg7/bin:/usr/xpg6/bin:/usr/xpg4/bin:/usr/bin
117 * set HOST_CC to /usr/gcc/5/bin/gcc
118 * set HOST_CXX to /usr/gcc/5/bin/g++
119