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ff5be6e810
Add https://www.gnu.org/software/autoconf-archive/ax_check_openssl.html to auto-detect compiler flags, linker flags and libraries to compile OpenSSL extensions. The M4 macro uses pkg-config and falls back to manual detection. Add autoconf magic to detect usable X509_VERIFY_PARAM_set1_host() and related functions. Refactor setup.py to use new config vars to compile _ssl and _hashlib modules. Signed-off-by: Christian Heimes <christian@python.org>
125 lines
4.1 KiB
Plaintext
125 lines
4.1 KiB
Plaintext
# ===========================================================================
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# https://www.gnu.org/software/autoconf-archive/ax_check_openssl.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CHECK_OPENSSL([action-if-found[, action-if-not-found]])
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#
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# DESCRIPTION
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#
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# Look for OpenSSL in a number of default spots, or in a user-selected
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# spot (via --with-openssl). Sets
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#
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# OPENSSL_INCLUDES to the include directives required
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# OPENSSL_LIBS to the -l directives required
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# OPENSSL_LDFLAGS to the -L or -R flags required
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#
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# and calls ACTION-IF-FOUND or ACTION-IF-NOT-FOUND appropriately
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#
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# This macro sets OPENSSL_INCLUDES such that source files should use the
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# openssl/ directory in include directives:
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#
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# #include <openssl/hmac.h>
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#
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# LICENSE
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#
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# Copyright (c) 2009,2010 Zmanda Inc. <http://www.zmanda.com/>
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# Copyright (c) 2009,2010 Dustin J. Mitchell <dustin@zmanda.com>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 10
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AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL])
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AC_DEFUN([AX_CHECK_OPENSSL], [
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found=false
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AC_ARG_WITH([openssl],
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[AS_HELP_STRING([--with-openssl=DIR],
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[root of the OpenSSL directory])],
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[
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case "$withval" in
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"" | y | ye | yes | n | no)
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AC_MSG_ERROR([Invalid --with-openssl value])
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;;
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*) ssldirs="$withval"
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;;
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esac
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], [
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# if pkg-config is installed and openssl has installed a .pc file,
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# then use that information and don't search ssldirs
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AC_CHECK_TOOL([PKG_CONFIG], [pkg-config])
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if test x"$PKG_CONFIG" != x""; then
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OPENSSL_LDFLAGS=`$PKG_CONFIG openssl --libs-only-L 2>/dev/null`
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if test $? = 0; then
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OPENSSL_LIBS=`$PKG_CONFIG openssl --libs-only-l 2>/dev/null`
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OPENSSL_INCLUDES=`$PKG_CONFIG openssl --cflags-only-I 2>/dev/null`
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found=true
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fi
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fi
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# no such luck; use some default ssldirs
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if ! $found; then
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ssldirs="/usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr"
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fi
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]
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)
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# note that we #include <openssl/foo.h>, so the OpenSSL headers have to be in
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# an 'openssl' subdirectory
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if ! $found; then
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OPENSSL_INCLUDES=
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for ssldir in $ssldirs; do
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AC_MSG_CHECKING([for openssl/ssl.h in $ssldir])
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if test -f "$ssldir/include/openssl/ssl.h"; then
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OPENSSL_INCLUDES="-I$ssldir/include"
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OPENSSL_LDFLAGS="-L$ssldir/lib"
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OPENSSL_LIBS="-lssl -lcrypto"
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found=true
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AC_MSG_RESULT([yes])
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break
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else
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AC_MSG_RESULT([no])
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fi
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done
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# if the file wasn't found, well, go ahead and try the link anyway -- maybe
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# it will just work!
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fi
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# try the preprocessor and linker with our new flags,
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# being careful not to pollute the global LIBS, LDFLAGS, and CPPFLAGS
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AC_MSG_CHECKING([whether compiling and linking against OpenSSL works])
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echo "Trying link with OPENSSL_LDFLAGS=$OPENSSL_LDFLAGS;" \
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"OPENSSL_LIBS=$OPENSSL_LIBS; OPENSSL_INCLUDES=$OPENSSL_INCLUDES" >&AS_MESSAGE_LOG_FD
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save_LIBS="$LIBS"
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save_LDFLAGS="$LDFLAGS"
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save_CPPFLAGS="$CPPFLAGS"
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LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"
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LIBS="$OPENSSL_LIBS $LIBS"
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CPPFLAGS="$OPENSSL_INCLUDES $CPPFLAGS"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([#include <openssl/ssl.h>], [SSL_new(NULL)])],
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[
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AC_MSG_RESULT([yes])
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$1
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], [
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AC_MSG_RESULT([no])
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$2
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])
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CPPFLAGS="$save_CPPFLAGS"
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LDFLAGS="$save_LDFLAGS"
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LIBS="$save_LIBS"
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AC_SUBST([OPENSSL_INCLUDES])
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AC_SUBST([OPENSSL_LIBS])
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AC_SUBST([OPENSSL_LDFLAGS])
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])
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