nut-debian/m4/nut_check_libopenssl.m4
2022-07-10 09:23:45 +02:00

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2.6 KiB
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dnl Check for OpenSSL (LIBOPENSSL) compiler flags. On success, set
dnl nut_have_openssl="yes" and nut_ssl_lib="OpenSSL", and define WITH_SSL,
dnl WITH_OPENSSL, LIBSSL_CFLAGS and LIBSSL_LIBS. On failure, set
dnl nut_have_libssl="no".
dnl This macro can be run multiple times, but will do the checking only once.
AC_DEFUN([NUT_CHECK_LIBOPENSSL],
[
if test -z "${nut_have_libopenssl_seen}"; then
nut_have_libopenssl_seen=yes
NUT_CHECK_PKGCONFIG
dnl save CFLAGS and LIBS
CFLAGS_ORIG="${CFLAGS}"
LIBS_ORIG="${LIBS}"
REQUIRES_ORIG="${REQUIRES}"
AS_IF([test x"$have_PKG_CONFIG" = xyes],
[AC_MSG_CHECKING(for OpenSSL version via pkg-config)
OPENSSL_VERSION="`$PKG_CONFIG --silence-errors --modversion openssl 2>/dev/null`"
if test "$?" != "0" -o -z "${OPENSSL_VERSION}"; then
OPENSSL_VERSION="none"
fi
AC_MSG_RESULT(${OPENSSL_VERSION} found)
],
[OPENSSL_VERSION="none"
AC_MSG_NOTICE([can not check OpenSSL settings via pkg-config])
]
)
AS_IF([test x"$OPENSSL_VERSION" != xnone],
[CFLAGS="`$PKG_CONFIG --silence-errors --cflags openssl 2>/dev/null`"
LIBS="`$PKG_CONFIG --silence-errors --libs openssl 2>/dev/null`"
REQUIRES="openssl"
],
[CFLAGS=""
LIBS="-lssl -lcrypto"
REQUIRES="openssl"
]
)
dnl allow overriding OpenSSL settings if the user knows best
AC_MSG_CHECKING(for OpenSSL cflags)
AC_ARG_WITH(openssl-includes,
AS_HELP_STRING([@<:@--with-openssl-includes=CFLAGS@:>@], [include flags for the OpenSSL library]),
[
case "${withval}" in
yes|no)
AC_MSG_ERROR(invalid option --with(out)-openssl-includes - see docs/configure.txt)
;;
*)
CFLAGS="${withval}"
;;
esac
], [])
AC_MSG_RESULT([${CFLAGS}])
AC_MSG_CHECKING(for OpenSSL ldflags)
AC_ARG_WITH(openssl-libs,
AS_HELP_STRING([@<:@--with-openssl-libs=LIBS@:>@], [linker flags for the OpenSSL library]),
[
case "${withval}" in
yes|no)
AC_MSG_ERROR(invalid option --with(out)-openssl-libs - see docs/configure.txt)
;;
*)
LIBS="${withval}"
;;
esac
], [])
AC_MSG_RESULT([${LIBS}])
dnl check if openssl is usable
AC_CHECK_HEADERS(openssl/ssl.h, [nut_have_openssl=yes], [nut_have_openssl=no], [AC_INCLUDES_DEFAULT])
AC_CHECK_FUNCS(SSL_CTX_new, [], [nut_have_openssl=no])
if test "${nut_have_openssl}" = "yes"; then
nut_with_ssl="yes"
nut_ssl_lib="(OpenSSL)"
AC_DEFINE(WITH_SSL, 1, [Define to enable SSL support])
AC_DEFINE(WITH_OPENSSL, 1, [Define to enable SSL support using OpenSSL])
LIBSSL_CFLAGS="${CFLAGS}"
LIBSSL_LIBS="${LIBS}"
LIBSSL_REQUIRES="${REQUIRES}"
fi
dnl restore original CFLAGS and LIBS
CFLAGS="${CFLAGS_ORIG}"
LIBS="${LIBS_ORIG}"
REQUIRES="${REQUIRES_ORIG}"
fi
])