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configure: disable OpenSSL deprecation warnings with OpenSSL >= 3

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We can't do this in the C headers, since by the time we include
`opensslv.h` in order to check the openssl version number, we will
have included `openssl/macros.h`, which is the thing that checks
whether we disabled deprecation warnings.
This commit is contained in:
Nick Mathewson 2020-10-28 10:30:24 -04:00
parent d9221968ce
commit e399d32cdf
1 changed files with 18 additions and 1 deletions
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19
configure.ac
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@ -937,13 +937,30 @@ LIBS="$TOR_OPENSSL_LIBS $LIBS"
LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
dnl Tor currently uses a number of APIs that are deprecated in OpenSSL 3.0.0
dnl and later. We want to migrate away from them, but that will be a lot of
dnl work. (See ticket tor#40166.) For now, we disable the deprecation
dnl warnings.
AC_MSG_CHECKING([for OpenSSL >= 3.0.0])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER <= 0x30000000L
#error "you_have_version_3"
#endif
]], [[]])],
[ AC_MSG_RESULT([no]) ],
[ AC_MSG_RESULT([yes]);
AC_DEFINE(OPENSSL_SUPPRESS_DEPRECATED, 1, [disable openssl deprecated-function warnings]) ])
AC_MSG_CHECKING([for OpenSSL < 1.0.1])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
#error "too old"
#endif
]], [[]])],
[ : ],
[ AC_MSG_RESULT([no]) ],
[ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[