about summary refs log tree commit diff
path: root/m4/check-os-options.m4
blob: 691379041ca5ec513ffb441f27d81f2f8ef8c7c0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
AC_DEFUN([CHECK_OS_OPTIONS], [

CFLAGS="$CFLAGS -Wall -std=gnu99 -fno-strict-aliasing"
BUILD_NC=yes

case $host_os in
	*aix*)
		HOST_OS=aix
		if test "`echo $CC | cut -d ' ' -f 1`" != "gcc" ; then
			CFLAGS="-qnoansialias $USER_CFLAGS"
		fi
		AC_SUBST([PLATFORM_LDADD], ['-lperfstat'])
		;;
	*cygwin*)
		HOST_OS=cygwin
		CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
		;;
	*darwin*)
		HOST_OS=darwin
		HOST_ABI=macosx
		#
		# Don't use arc4random on systems before 10.12 because of
		# weak seed on failure to open /dev/random, based on latest
		# public source:
		# http://www.opensource.apple.com/source/Libc/Libc-997.90.3/gen/FreeBSD/arc4random.c
		#
		# We use the presence of getentropy() to detect 10.12. The
		# following check take into account that:
 		#
		#   - iOS <= 10.1 fails because of missing getentropy and
		#     hence they miss sys/random.h
		#
		#   - in macOS 10.12 getentropy is not tagged as introduced in
		#     10.12 so we cannot use it for target < 10.12
		#
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <AvailabilityMacros.h>
#include <unistd.h>
#include <sys/random.h>  /* Systems without getentropy() should die here */

/* Based on: https://gitweb.torproject.org/tor.git/commit/?id=16fcbd21 */
#ifndef MAC_OS_X_VERSION_10_12
#  define MAC_OS_X_VERSION_10_12 101200
#endif
#if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
#  if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
#    error "Running on Mac OSX 10.11 or earlier"
#  endif
#endif
                       ]], [[
char buf[1]; getentropy(buf, 1);
					   ]])],
                       [ USE_BUILTIN_ARC4RANDOM=no ],
                       [ USE_BUILTIN_ARC4RANDOM=yes ]
		)
		AC_MSG_CHECKING([whether to use builtin arc4random])
		AC_MSG_RESULT([$USE_BUILTIN_ARC4RANDOM])
		# Not available on iOS
		AC_CHECK_HEADER([arpa/telnet.h], [], [BUILD_NC=no])
		;;
	*freebsd*)
		HOST_OS=freebsd
		HOST_ABI=elf
		# fork detection missing, weak seed on failure
		# https://svnweb.freebsd.org/base/head/lib/libc/gen/arc4random.c?revision=268642&view=markup
		USE_BUILTIN_ARC4RANDOM=yes
		AC_SUBST([PROG_LDADD], ['-lthr'])
		;;
	*hpux*)
		HOST_OS=hpux;
		if test "`echo $CC | cut -d ' ' -f 1`" = "gcc" ; then
			CFLAGS="$CFLAGS -mlp64"
		else
			CFLAGS="-g -O2 +DD64 +Otype_safety=off $USER_CFLAGS"
		fi
		CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=600 -D__STRICT_ALIGNMENT"
		;;
	*linux*)
		HOST_OS=linux
		HOST_ABI=elf
		CPPFLAGS="$CPPFLAGS -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_SOURCE -D_GNU_SOURCE"
		;;
	*midipix*)
		HOST_OS=midipix
		CPPFLAGS="$CPPFLAGS -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_SOURCE -D_GNU_SOURCE"
		;;
	*netbsd*)
		HOST_OS=netbsd
		HOST_ABI=elf
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/param.h>
#if __NetBSD_Version__ < 700000001
        undefined
#endif
                       ]], [[]])],
                       [ USE_BUILTIN_ARC4RANDOM=no ],
                       [ USE_BUILTIN_ARC4RANDOM=yes ]
		)
		CPPFLAGS="$CPPFLAGS -D_OPENBSD_SOURCE"
		;;
	*openbsd* | *bitrig*)
		HOST_OS=openbsd
		HOST_ABI=elf
		AC_DEFINE([HAVE_ATTRIBUTE__BOUNDED__], [1], [OpenBSD gcc has bounded])
		AC_DEFINE([HAVE_ATTRIBUTE__DEAD], [1], [OpenBSD gcc has __dead])
		;;
	*mingw*)
		HOST_OS=win
		HOST_ABI=mingw64
		BUILD_NC=no
		CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE -D_POSIX -D_POSIX_SOURCE -D__USE_MINGW_ANSI_STDIO"
		CPPFLAGS="$CPPFLAGS -D_REENTRANT -D_POSIX_THREAD_SAFE_FUNCTIONS"
		CPPFLAGS="$CPPFLAGS -DWIN32_LEAN_AND_MEAN -D_WIN32_WINNT=0x0600"
		CPPFLAGS="$CPPFLAGS"
		AC_SUBST([PLATFORM_LDADD], ['-lws2_32'])
		;;
	*solaris*)
		HOST_OS=solaris
		HOST_ABI=elf
		CPPFLAGS="$CPPFLAGS -D__EXTENSIONS__ -D_XOPEN_SOURCE=600 -DBSD_COMP"
		AC_SUBST([PLATFORM_LDADD], ['-ldl -lnsl -lsocket'])
		;;
	*) ;;
esac

AM_CONDITIONAL([HOST_AIX],     [test x$HOST_OS = xaix])
AM_CONDITIONAL([HOST_CYGWIN],  [test x$HOST_OS = xcygwin])
AM_CONDITIONAL([HOST_DARWIN],  [test x$HOST_OS = xdarwin])
AM_CONDITIONAL([HOST_FREEBSD], [test x$HOST_OS = xfreebsd])
AM_CONDITIONAL([HOST_HPUX],    [test x$HOST_OS = xhpux])
AM_CONDITIONAL([HOST_LINUX],   [test x$HOST_OS = xlinux])
AM_CONDITIONAL([HOST_MIDIPIX], [test x$HOST_OS = xmidipix])
AM_CONDITIONAL([HOST_NETBSD],  [test x$HOST_OS = xnetbsd])
AM_CONDITIONAL([HOST_OPENBSD], [test x$HOST_OS = xopenbsd])
AM_CONDITIONAL([HOST_SOLARIS], [test x$HOST_OS = xsolaris])
AM_CONDITIONAL([HOST_WIN],     [test x$HOST_OS = xwin])
])