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Autoconf Macro: check_ssl
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<hr>
<h1>
check_ssl
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>CHECK_SSL</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
This macro will check various standard spots for OpenSSL including a
user-supplied directory. The user uses '--with-ssl' or
'--with-ssl=/path/to/ssl' as arguments to configure.
</p>
<p>
If OpenSSL is found the include directory gets added to CFLAGS and CXXFLAGS
as well as '-DHAVE_SSL', '-lssl' & '-lcrypto' get added to LIBS, and
the libraries location gets added to LDFLAGS. Finally 'HAVE_SSL' gets set
to 'yes' for use in your Makefile.in I use it like so (valid for gmake):
</p>
<pre>
HAVE_SSL = @HAVE_SSL@
ifeq ($(HAVE_SSL),yes)
SRCS+= @srcdir@/my_file_that_needs_ssl.c
endif
</pre>
<p>
For bsd 'bmake' use:
</p>
<pre>
.if ${HAVE_SSL} == "yes"
SRCS+= @srcdir@/my_file_that_needs_ssl.c
.endif
</pre>
</div>
<h2>
Author
</h2>
<p class="indent">
Mark Ethan Trostler <trostler@juniper.net>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2003-01-28
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([CHECK_SSL],
[AC_MSG_CHECKING(if ssl is wanted)
AC_ARG_WITH(ssl,
[ --with-ssl enable ssl [will check /usr/local/ssl
/usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr ]
],
[ AC_MSG_RESULT(yes)
for dir in $withval /usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr; do
ssldir="$dir"
if test -f "$dir/include/openssl/ssl.h"; then
found_ssl="yes";
CFLAGS="$CFLAGS -I$ssldir/include/openssl -DHAVE_SSL";
CXXFLAGS="$CXXFLAGS -I$ssldir/include/openssl -DHAVE_SSL";
break;
fi
if test -f "$dir/include/ssl.h"; then
found_ssl="yes";
CFLAGS="$CFLAGS -I$ssldir/include/ -DHAVE_SSL";
CXXFLAGS="$CXXFLAGS -I$ssldir/include/ -DHAVE_SSL";
break
fi
done
if test x_$found_ssl != x_yes; then
AC_MSG_ERROR(Cannot find ssl libraries)
else
printf "OpenSSL found in $ssldir\n";
LIBS="$LIBS -lssl -lcrypto";
LDFLAGS="$LDFLAGS -L$ssldir/lib";
HAVE_SSL=yes
fi
AC_SUBST(HAVE_SSL)
],
[
AC_MSG_RESULT(no)
])
])dnl
</pre>
</div>
<h2>
License
</h2>
<div class="indent">
<span style="white-space:nowrap;">Copyright © 2003 Mark Ethan Trostler
<trostler@juniper.net></span>
<p>
Copying and distribution of this file, with or without modification, are
permitted in any medium without royalty provided the copyright notice and
this notice are preserved.
</p>
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