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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 $host_os | cut -c 1-4`" = "ia64" ; then
if test "`echo $CC | cut -d ' ' -f 1`" = "gcc" ; then
CFLAGS="$CFLAGS -mlp64"
else
CFLAGS="+DD64"
fi
fi
if ! test "`echo $CC | cut -d ' ' -f 1`" = "gcc" ; then
CFLAGS="-g -O2 +Otype_safety=off $CFLAGS $USER_CFLAGS"
fi
CPPFLAGS="$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="$CPPFLAGS"
AC_SUBST([PLATFORM_LDADD], ['-lws2_32 -lbcrypt'])
;;
*solaris*)
HOST_OS=solaris
HOST_ABI=elf
CPPFLAGS="$CPPFLAGS -D__EXTENSIONS__ -D_XOPEN_SOURCE=600 -DBSD_COMP"
AC_SUBST([PLATFORM_LDADD], ['-ldl -lmd -lnsl -lsocket'])
;;
*) ;;
esac
# Check if time_t is sized correctly
AC_CHECK_SIZEOF([time_t], [time.h])
AM_CONDITIONAL([SMALL_TIME_T], [test "$ac_cv_sizeof_time_t" = "4"])
if test "$ac_cv_sizeof_time_t" = "4"; then
AC_DEFINE([SMALL_TIME_T])
echo " ** Warning, this system is unable to represent times past 2038"
echo " ** It will behave incorrectly when handling valid RFC5280 dates"
if test "$host_os" = "mingw32" ; then
echo " **"
echo " ** You can solve this by adjusting the build flags in your"
echo " ** mingw-w64 toolchain. Refer to README.windows for details."
fi
fi
AM_CONDITIONAL([HOST_AIX], [test x$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])
])
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