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[svn] Improve OpenSSL autodetection.
Published in <sxsitbcon7w.fsf@florida.arsdigita.de>.
This commit is contained in:
hniksic
parent
aa76fd748c
commit
b0ab325703
@ -1,3 +1,7 @@
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2001-12-12 Hrvoje Niksic <hniksic@arsdigita.com>
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* configure.in: Autodetect SSL. Check for SSL includes too.
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2001-12-11 Hrvoje Niksic <hniksic@arsdigita.com>
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* config.sub: Ditto.
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170
configure.in
170
configure.in
@ -46,7 +46,8 @@ AC_ARG_WITH(socks,
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[AC_DEFINE(HAVE_SOCKS)])
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AC_ARG_WITH(ssl,
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[ --with-ssl[=SSL_ROOT] link with libssl [in SSL_ROOT/lib] for https: support])
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[ --with-ssl[=SSL-ROOT] link with SSL support [default=auto]
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--without-ssl disable SSL autodetection])
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AC_ARG_ENABLE(opie,
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[ --disable-opie disable support for opie or s/key FTP login],
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@ -215,25 +216,53 @@ then
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AC_CHECK_LIB(socks, Rconnect)
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fi
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dnl If --with-ssl was specified, make sure we can link with the
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dnl OpenSSL libs. We should probably auto-detect this by default.
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dnl $with_ssl can be one of:
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dnl - empty string or "auto", meaning autodetect SSL and use it if found.
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dnl - "yes", meaning link with SSL or bail out.
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dnl - "no", meaning don't link with SSL.
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dnl - anything else, meaning use that as the SSL root, and bail out
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dnl if it fails.
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if test x"$with_ssl" != x -a x"$with_ssl" != x"no"; then
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if test x"$with_ssl" = x; then
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dnl Canonicalize unspecified with-ssl setting to "auto". This
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dnl implements the "auto-detect by default" feature. If you want to
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dnl change this to "ignore SSL by default", change "auto" to "no".
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with_ssl=auto
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fi
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dnl Detection of OpenSSL is much hairier than the detection of other
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dnl libraries because OpenSSL can be compiled as a third-party
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dnl library, which means it will not be found without additional
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dnl linker magic. It would be really nice to rework this check into
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dnl an AC_DEFUN so that we can reuse it for other third-party
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dnl libraries.
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if test x"$with_ssl" != x"no"; then
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wget_force_ssl=no
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if test x"$with_ssl" = x"yes"; then
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dnl OpenSSL's default install location is "/usr/local/ssl". We also
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dnl allow /usr/local for regular-style install, and /usr for Linux
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dnl stuff.
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ssl_all_roots="default /usr/local/ssl /usr/local /opt"
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else
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dnl Root has been kindly provided by the user.
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ssl_all_roots=$with_ssl
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wget_force_ssl=yes
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fi
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if test x"$with_ssl" = x"yes" || test x"$with_ssl" = x"auto"; then
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dnl OpenSSL's root was not specified, so we have to guess. First
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dnl try the system default location, then "/usr/local/ssl" (where
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dnl OpenSSL installs by default), then "/usr/local" (traditional
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dnl choice for installation root), then "/opt".
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ssl_all_roots="system-default /usr/local/ssl /usr/local /opt"
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else
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dnl Root has been specified by the user.
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ssl_all_roots=$with_ssl
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wget_force_ssl=yes
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fi
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wget_save_CC=$CC
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wget_save_LIBS=$LIBS
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wget_save_LDFLAGS=$LDFLAGS
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wget_save_CC=$CC
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wget_save_CPPFLAGS=$CPPFLAGS
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dnl Use libtool for OpenSSL tests to handle the "-R<rpath>" option.
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dnl Use libtool for OpenSSL tests so we can specify "-R<rpath>"
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dnl without having to know how the linker handles it.
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CC="$SHELL ./libtool $CC"
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dnl Unfortunately, as of this writing (OpenSSL 0.9.6), the libcrypto
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@ -244,13 +273,13 @@ if test x"$with_ssl" != x -a x"$with_ssl" != x"no"; then
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AC_CHECK_LIB(dl,dlopen)
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AC_CHECK_LIB(dl,shl_load)
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ssl_linked=no
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ssl_success=no
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dnl Now try to find SSL libraries in each of the likely SSL roots.
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for ssl_root in $ssl_all_roots
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do
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if test x"$ssl_root" = xdefault; then
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dnl Try the default library locations.
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if test x"$ssl_root" = x"system-default"; then
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dnl Try the default include and library locations.
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SSL_INCLUDES=
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else
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dnl Try this specific root.
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@ -260,10 +289,30 @@ if test x"$with_ssl" != x -a x"$with_ssl" != x"no"; then
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LDFLAGS="-L$ssl_root/lib -R$ssl_root/lib $wget_save_LDFLAGS"
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fi
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ssl_link_failure=no
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AC_MSG_RESULT(["Looking for SSL libraries in $ssl_root"])
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dnl Check whether the compiler can find the include files. On
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dnl some systems Gcc finds libraries in /usr/local/lib, but fails
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dnl to find the includes in /usr/local/include.
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ssl_found_includes=no
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CPPFLAGS="$SSL_INCLUDES $wget_save_CPPFLAGS"
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AC_MSG_CHECKING(["for includes"])
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AC_TRY_CPP([#include <openssl/ssl.h>
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#include <openssl/rsa.h>
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],
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AC_MSG_RESULT("found"); ssl_found_includes=yes,
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AC_MSG_RESULT("not found")
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)
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if test x"$ssl_found_includes" = xno; then
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continue
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fi
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ssl_link_failure=no
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dnl Make sure that the checks don't run afoul of the cache. It
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dnl would be nicer to temporarily turn off the cache, but
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dnl apparently Autoconf doesn't allow that.
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@ -278,18 +327,22 @@ if test x"$with_ssl" != x -a x"$with_ssl" != x"no"; then
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AC_CHECK_LIB(crypto, RSA_new, , ssl_link_failure=yes)
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AC_CHECK_LIB(ssl, SSL_new, , ssl_link_failure=yes)
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dnl If ssl_link_failure is still no, the libraries link. But we
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dnl still need to check if the program linked with those libraries
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dnl under these settings with run. On some systems (Solaris), Gcc
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dnl adds -L/usr/local/lib to the linking line, but fails to add
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dnl -R/usr/local/lib, thus creating executables that link, but
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dnl fail to run.
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if test x"$ssl_link_failure" = xyes; then
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dnl One or both libs failed to link.
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continue
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fi
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dnl The libraries link. But we still need to check if the program
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dnl linked with those libraries under these settings with run. On
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dnl some systems (Solaris), Gcc adds -L/usr/local/lib to the
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dnl linking line, but fails to add -R/usr/local/lib, thus creating
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dnl executables that link, but fail to run.
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dnl If we are cross-compiling, just assume that working linkage
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dnl implies working executable.
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if test x"$ssl_link_failure" = xno; then
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dnl Now try to run the thing.
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ssl_run_failure=no
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AC_MSG_CHECKING("whether SSL libs are resolved at runtime")
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AC_TRY_RUN([
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int RSA_new();
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@ -297,50 +350,51 @@ int SSL_new();
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main(){return 0;}
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],
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AC_MSG_RESULT("yes"),
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AC_MSG_RESULT("no"); ssl_link_failure=yes,
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AC_MSG_RESULT("cross"))
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fi
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AC_MSG_RESULT("no"); ssl_run_failure=yes,
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AC_MSG_RESULT("cross")
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)
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if test x"$ssl_link_failure" = xno; then
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dnl This echo doesn't look right, but I'm not sure what to use
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dnl instead.
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if test x"$ssl_run_failure" = xno; then
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ssl_success=yes
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break
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fi
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done
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if test x"$ssl_success" = xyes; then
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dnl AC_MSG_RESULT doesn't look right here, but I'm not sure what
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dnl to use instead.
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AC_MSG_RESULT("Compiling in support for SSL in $ssl_root")
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AC_DEFINE(HAVE_SSL)
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AC_SUBST(SSL_INCLUDES)
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SSL_OBJ='gen_sslfunc$o'
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AC_SUBST(SSL_OBJ)
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ssl_linked=yes
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break
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fi
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done
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if test x"$ssl_linked" = xno; then
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LD_FLAGS=$wget_save_LDFLAGS
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else
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LDFLAGS=$wget_save_LDFLAGS
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LIBS=$wget_save_LIBS
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dnl Perhaps we should abort here. Dan argues that configure
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dnl scripts shouldn't abort out of principle, but on the other
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dnl hand remember that the user explicitly requested linking with
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dnl SSL.
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dnl IMHO there should be a way to specify whether SSL should be
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dnl avoided, auto-detected, or required, defaulting to
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dnl `autodetect'. Only in the `require' mode the script would
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dnl abort if SSL is not found.
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echo
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echo "WARNING: Failed to link with OpenSSL libraries in $ssl_root/lib."
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echo " Wget will be built without support for https://... URLs."
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echo
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dnl If linking with SSL was forced rather than auto-detected, then
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dnl bail out if SSL failed.
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if test x"$wget_force_ssl" = x"yes"; then
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exec >&2
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echo "ERROR: Failed to find OpenSSL libraries."
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exit 2
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fi
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fi
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dnl Restore the compiler setting.
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CC=$wget_save_CC
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dnl Restore the CPPFLAGS. Do this regardless of whether linking
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dnl with SSL succeeded -- SSL includes will be handled using
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dnl @SSL_INCLUDES@.
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CPPFLAGS=$wget_save_CPPFLAGS
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fi
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dnl
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dnl Find an md5 implementation.
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dnl
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if test x$wget_need_md5 = xyes
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if test x"$wget_need_md5" = xyes
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then
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MD5_OBJ='gen-md5$o'
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@ -350,7 +404,7 @@ then
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dnl something simple like "MD5Update" because there are a number of
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dnl MD5 implementations that use that name. md5_calc is, hopefully,
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dnl specific to the Solaris MD5 library.
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if test x$found_md5 = xno; then
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if test x"$found_md5" = xno; then
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AC_CHECK_LIB(md5, md5_calc, [
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AC_DEFINE(HAVE_SOLARIS_MD5)
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LIBS="-lmd5 $LIBS"
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@ -360,15 +414,15 @@ then
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dnl Then see if we're linking OpenSSL anyway; if yes, use its md5
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dnl implementation.
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if test x$found_md5 = xno; then
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if test x$ssl_linked = xyes; then
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if test x"$found_md5" = xno; then
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if test x"$ssl_success" = xyes; then
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AC_DEFINE(HAVE_OPENSSL_MD5)
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found_md5=yes
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fi
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fi
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dnl If none of the above worked, use the builtin one.
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if test x$found_md5 = xno; then
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dnl If none of the above worked, use the one we ship with Wget.
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if test x"$found_md5" = xno; then
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AC_DEFINE(HAVE_BUILTIN_MD5)
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found_md5=yes
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MD5_OBJ="$MD5_OBJ gnu-md5\$o"
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