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libssh2/configure.ac
yann-morin-1998 fc5d77881e
buildsystem: drop custom buildconf script, rely on autoreconf (#224)
Notes:
The buildconf script is currently required, because we need to copy a
header around, because it is used both from the library and the examples
sources.

However, having a custom 'buildconf'-like script is not needed if we can
ensure that the header exists by the time it is needed. For that, we can
just append the src/ directory to the headers search path for the
examples.

And then it means we no longer need to generate the same header twice,
so we remove the second one from configure.ac.

Now, we can just call "autoreconf -fi" to generate the autotools files,
instead of relying on the canned sequence in "buildconf", since
autoreconf has now long known what to do at the correct moment (future
versions of autotools, automake, autopoint, autoheader etc... may
require an other ordering, or other intermediate steps, etc...).

Eventually, get rid of buildconf now it is no longer needed. In fact, we
really keep it for legacy, but have it just call autoreconf (and print a
nice user-friendly warning). Don't include it in the release tarballs,
though.

Update doc, gitignore, and travis-CI jobs accordingly.

Credit:
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Sam Voss <sam.voss@rockwellcollins.com>
2020-07-01 11:44:08 -07:00

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# AC_PREREQ(2.57)
AC_INIT(libssh2, [-], libssh2-devel@cool.haxx.se)
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_SRCDIR([src])
AC_CONFIG_HEADERS([src/libssh2_config.h])
AM_MAINTAINER_MODE
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
dnl SED is needed by some of the tools
AC_PATH_PROG( SED, sed, sed-was-not-found-by-configure,
$PATH:/usr/bin:/usr/local/bin)
AC_SUBST(SED)
if test "x$SED" = "xsed-was-not-found-by-configure"; then
AC_MSG_WARN([sed was not found, this may ruin your chances to build fine])
fi
dnl figure out the libssh2 version
LIBSSH2VER=`$SED -ne 's/^#define LIBSSH2_VERSION *"\(.*\)"/\1/p' ${srcdir}/include/libssh2.h`
AM_INIT_AUTOMAKE
AC_MSG_CHECKING([libssh2 version])
AC_MSG_RESULT($LIBSSH2VER)
AC_SUBST(LIBSSH2VER)
AB_VERSION=$LIBSSH2VER
AB_INIT
# Check for the OS.
# Daniel's note: this should not be necessary and we need to work to
# get this removed.
AC_CANONICAL_HOST
case "$host" in
*-mingw*)
CFLAGS="$CFLAGS -DLIBSSH2_WIN32"
LIBS="$LIBS -lws2_32"
;;
*-cygwin)
CFLAGS="$CFLAGS -DLIBSSH2_WIN32"
;;
*darwin*)
CFLAGS="$CFLAGS -DLIBSSH2_DARWIN"
;;
*hpux*)
;;
*osf*)
CFLAGS="$CFLAGS -D_POSIX_PII_SOCKET"
;;
*)
;;
esac
AC_CHECK_TYPE(long long,
[AC_DEFINE(HAVE_LONGLONG, 1,
[Define to 1 if the compiler supports the 'long long' data type.])]
longlong="yes"
)
dnl Our configure and build reentrant settings
CURL_CONFIGURE_REENTRANT
# Some systems (Solaris?) have socket() in -lsocket.
AC_SEARCH_LIBS(socket, socket)
# Solaris has inet_addr() in -lnsl.
AC_SEARCH_LIBS(inet_addr, nsl)
AC_SUBST(LIBS)
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PATH_PROGS(SSHD, [sshd], [],
[$PATH$PATH_SEPARATOR/usr/libexec$PATH_SEPARATOR]dnl
[/usr/sbin$PATH_SEPARATOR/usr/etc$PATH_SEPARATOR/etc])
AM_CONDITIONAL(SSHD, test -n "$SSHD")
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL
AC_C_BIGENDIAN
dnl check for how to do large files
AC_SYS_LARGEFILE
# Crypto backends
found_crypto=none
found_crypto_str=""
support_clear_memory=no
crypto_errors=""
m4_set_add([crypto_backends], [openssl])
m4_set_add([crypto_backends], [libgcrypt])
m4_set_add([crypto_backends], [mbedtls])
m4_set_add([crypto_backends], [wincng])
AC_ARG_WITH([crypto],
AC_HELP_STRING([--with-crypto=auto|]m4_set_contents([crypto_backends], [|]),
[Select crypto backend (default: auto)]),
use_crypto=$withval,
use_crypto=auto
)
case "${use_crypto}" in
auto|m4_set_contents([crypto_backends], [|]))
m4_set_map([crypto_backends], [LIBSSH2_CHECK_CRYPTO])
;;
yes|"")
crypto_errors="No crypto backend specified!"
;;
*)
crypto_errors="Unknown crypto backend '${use_crypto}' specified!"
;;
esac
if test "$found_crypto" = "none"; then
crypto_errors="${crypto_errors}
Specify --with-crypto=\$backend and/or the neccessary library search prefix.
Known crypto backends: auto, m4_set_contents([crypto_backends], [, ])"
AS_MESSAGE([ERROR: ${crypto_errors}])
else
test "$found_crypto_str" = "" && found_crypto_str="$found_crypto"
fi
m4_set_foreach([crypto_backends], [backend],
[AM_CONDITIONAL(m4_toupper(backend), test "$found_crypto" = "backend")]
)
m4_undefine([backend])
# libz
AC_ARG_WITH([libz],
AC_HELP_STRING([--with-libz],[Use libz for compression]),
use_libz=$withval,
use_libz=auto)
found_libz=no
libz_errors=""
if test "$use_libz" != no; then
AC_LIB_HAVE_LINKFLAGS([z], [], [#include <zlib.h>])
if test "$ac_cv_libz" != yes; then
if test "$use_libz" = auto; then
AC_MSG_NOTICE([Cannot find libz, disabling compression])
found_libz="disabled; no libz found"
else
libz_errors="No libz found!
Try --with-libz-prefix=PATH if you know that you have it."
AS_MESSAGE([ERROR: $libz_errors])
fi
else
AC_DEFINE(LIBSSH2_HAVE_ZLIB, 1, [Compile in zlib support])
LIBSREQUIRED="$LIBSREQUIRED${LIBSREQUIRED:+ }zlib"
found_libz="yes"
fi
fi
AC_SUBST(LIBSREQUIRED)
#
# Optional Settings
#
AC_ARG_ENABLE(crypt-none,
AC_HELP_STRING([--enable-crypt-none],[Permit "none" cipher -- NOT RECOMMENDED]),
[AC_DEFINE(LIBSSH2_CRYPT_NONE, 1, [Enable "none" cipher -- NOT RECOMMENDED])])
AC_ARG_ENABLE(mac-none,
AC_HELP_STRING([--enable-mac-none],[Permit "none" MAC -- NOT RECOMMENDED]),
[AC_DEFINE(LIBSSH2_MAC_NONE, 1, [Enable "none" MAC -- NOT RECOMMENDED])])
AC_ARG_ENABLE(gex-new,
AC_HELP_STRING([--disable-gex-new],[Disable "new" diffie-hellman-group-exchange-sha1 method]),
[GEX_NEW=$enableval])
if test "$GEX_NEW" != "no"; then
AC_DEFINE(LIBSSH2_DH_GEX_NEW, 1, [Enable newer diffie-hellman-group-exchange-sha1 syntax])
fi
AC_ARG_ENABLE(clear-memory,
AC_HELP_STRING([--disable-clear-memory],[Disable clearing of memory before being freed]),
[CLEAR_MEMORY=$enableval])
if test "$CLEAR_MEMORY" != "no"; then
if test "$support_clear_memory" = "yes"; then
AC_DEFINE(LIBSSH2_CLEAR_MEMORY, 1, [Enable clearing of memory before being freed])
enable_clear_memory=yes
else
if test "$CLEAR_MEMORY" = "yes"; then
AC_MSG_ERROR([secure clearing/zeroing of memory is not supported by the selected crypto backend])
else
AC_MSG_WARN([secure clearing/zeroing of memory is not supported by the selected crypto backend])
fi
enable_clear_memory=unsupported
fi
else
if test "$support_clear_memory" = "yes"; then
enable_clear_memory=no
else
AC_MSG_WARN([secure clearing/zeroing of memory is not supported by the selected crypto backend])
enable_clear_memory=unsupported
fi
fi
dnl ************************************************************
dnl option to switch on compiler debug options
dnl
AC_MSG_CHECKING([whether to enable pedantic and debug compiler options])
AC_ARG_ENABLE(debug,
AC_HELP_STRING([--enable-debug],[Enable pedantic and debug options])
AC_HELP_STRING([--disable-debug],[Disable debug options]),
[ case "$enable_debug" in
no)
AC_MSG_RESULT(no)
CPPFLAGS="$CPPFLAGS -DNDEBUG"
;;
*) AC_MSG_RESULT(yes)
enable_debug=yes
CPPFLAGS="$CPPFLAGS -DLIBSSH2DEBUG"
CFLAGS="$CFLAGS -g"
dnl set compiler "debug" options to become more picky, and remove
dnl optimize options from CFLAGS
CURL_CC_DEBUG_OPTS
;;
esac
],
enable_debug=no
AC_MSG_RESULT(no)
)
dnl ************************************************************
dnl Enable hiding of internal symbols in library to reduce its size and
dnl speed dynamic linking of applications. This currently is only supported
dnl on gcc >= 4.0 and SunPro C.
dnl
AC_MSG_CHECKING([whether to enable hidden symbols in the library])
AC_ARG_ENABLE(hidden-symbols,
AC_HELP_STRING([--enable-hidden-symbols],[Hide internal symbols in library])
AC_HELP_STRING([--disable-hidden-symbols],[Leave all symbols with default visibility in library]),
[ case "$enableval" in
no)
AC_MSG_RESULT(no)
;;
*)
AC_MSG_CHECKING([whether $CC supports it])
if test "$GCC" = yes ; then
if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then
AC_MSG_RESULT(yes)
AC_DEFINE(LIBSSH2_API, [__attribute__ ((visibility ("default")))], [to make a symbol visible])
CFLAGS="$CFLAGS -fvisibility=hidden"
else
AC_MSG_RESULT(no)
fi
else
dnl Test for SunPro cc
if $CC 2>&1 | grep flags >/dev/null && $CC -flags | grep xldscope= >/dev/null ; then
AC_MSG_RESULT(yes)
AC_DEFINE(LIBSSH2_API, [__global], [to make a symbol visible])
CFLAGS="$CFLAGS -xldscope=hidden"
else
AC_MSG_RESULT(no)
fi
fi
;;
esac ],
AC_MSG_RESULT(no)
)
# Build example applications?
AC_MSG_CHECKING([whether to build example applications])
AC_ARG_ENABLE([examples-build],
AC_HELP_STRING([--enable-examples-build], [Build example applications (this is the default)])
AC_HELP_STRING([--disable-examples-build], [Do not build example applications]),
[case "$enableval" in
no | false)
build_examples='no'
;;
*)
build_examples='yes'
;;
esac], [build_examples='yes'])
AC_MSG_RESULT($build_examples)
AM_CONDITIONAL([BUILD_EXAMPLES], [test "x$build_examples" != "xno"])
# Checks for header files.
# AC_HEADER_STDC
AC_CHECK_HEADERS([errno.h fcntl.h stdio.h stdlib.h unistd.h sys/uio.h])
AC_CHECK_HEADERS([sys/select.h sys/socket.h sys/ioctl.h sys/time.h])
AC_CHECK_HEADERS([arpa/inet.h netinet/in.h])
AC_CHECK_HEADERS([sys/un.h], [have_sys_un_h=yes], [have_sys_un_h=no])
AM_CONDITIONAL([HAVE_SYS_UN_H], test "x$have_sys_un_h" = xyes)
case $host in
*-*-cygwin* | *-*-cegcc*)
# These are POSIX-like systems using BSD-like sockets API.
;;
*)
AC_CHECK_HEADERS([windows.h winsock2.h ws2tcpip.h])
;;
esac
case $host in
*darwin*|*interix*)
dnl poll() does not work on these platforms
dnl Interix: "does provide poll(), but the implementing developer must
dnl have been in a bad mood, because poll() only works on the /proc
dnl filesystem here"
dnl Mac OS X's poll has funny behaviors, like:
dnl not being able to do poll on no fildescriptors (10.3?)
dnl not being able to poll on some files (like anything in /dev)
dnl not having reliable timeout support
dnl inconsistent return of POLLHUP where other implementations give POLLIN
AC_MSG_NOTICE([poll use is disabled on this platform])
;;
*)
AC_CHECK_FUNCS(poll)
;;
esac
AC_CHECK_FUNCS(gettimeofday select strtoll memset_s)
dnl Check for select() into ws2_32 for Msys/Mingw
if test "$ac_cv_func_select" != "yes"; then
AC_MSG_CHECKING([for select in ws2_32])
AC_TRY_LINK([
#ifdef HAVE_WINSOCK2_H
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <winsock2.h>
#endif
],[
select(0,(fd_set *)NULL,(fd_set *)NULL,(fd_set *)NULL,(struct timeval *)NULL);
],[
AC_MSG_RESULT([yes])
HAVE_SELECT="1"
AC_DEFINE_UNQUOTED(HAVE_SELECT, 1,
[Define to 1 if you have the select function.])
],[
AC_MSG_RESULT([no])
])
fi
AC_FUNC_ALLOCA
# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
CURL_CHECK_NONBLOCKING_SOCKET
missing_required_deps=0
if test "${libz_errors}" != ""; then
AS_MESSAGE([ERROR: ${libz_errors}])
missing_required_deps=1
fi
if test "$found_crypto" = "none"; then
AS_MESSAGE([ERROR: ${crypto_errors}])
missing_required_deps=1
fi
if test $missing_required_deps = 1; then
AC_MSG_ERROR([Required dependencies are missing!])
fi
# Configure parameters
LIBSSH2_CHECK_OPTION_WERROR
AC_CONFIG_FILES([Makefile
src/Makefile
tests/Makefile
example/Makefile
docs/Makefile
libssh2.pc])
AC_OUTPUT
AC_MSG_NOTICE([summary of build options:
version: ${LIBSSH2VER}
Host type: ${host}
Install prefix: ${prefix}
Compiler: ${CC}
Compiler flags: ${CFLAGS}
Library types: Shared=${enable_shared}, Static=${enable_static}
Crypto library: ${found_crypto_str}
Clear memory: $enable_clear_memory
Debug build: $enable_debug
Build examples: $build_examples
Path to sshd: $ac_cv_path_SSHD (only for self-tests)
zlib compression: ${found_libz}
])