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Add abilty to use static vcruntime

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Add a config option to selectively enable disable static vcruntime
linkage (default disabled, implying dynamic vcruntime linkage)

Fixes #12210

Reviewed-by: Norbert Pocs <norbertp@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
MergeDate: Tue Feb 17 09:43:37 2026
(Merged from https://github.com/openssl/openssl/pull/29995)
This commit is contained in:
Neil Horman 2026-02-12 19:38:36 -05:00 • committed by Tomas Mraz
parent bfd7c10f57
commit 9431cc20be
4 changed files with 15 additions and 3 deletions
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8
CHANGES.md
View file

@ -37,6 +37,14 @@ OpenSSL 4.0
*Simo Sorce*
* Windows targets support static/dynamic vcruntime linkage
Using the `enable-static-vcruntime` option OpenSSL can now be configured
to use the static or dynamic vcruntime.dll linkage. The multithreaded or
single threaded static vcruntime is selected based on the enable-threads option.
*Neil Horman*
* OPENSSL_cleanup() now runs in a global destructor, or not at all by default.
OpenSSL_cleanup() will no longer by default free global objects when run from

6
Configurations/10-main.conf
View file

@ -1566,11 +1566,11 @@ my %targets = (
cflags => add(picker(default => '/Gs0 /GF /Gy',
debug =>
sub {
($disabled{shared} ? "" : "/MDd");
($disabled{shared} ? "" : ($disabled{"static-vcruntime"} ? "/MDd" : ($disabled{threads} ? "" : "/MT")));
},
release =>
sub {
($disabled{shared} ? "" : "/MD");
($disabled{shared} ? "" : ($disabled{"static-vcruntime"} ? "/MD": ($disabled{threads} ? "" : "/MT")));
})),
defines => add(picker(default => [], # works as type cast
debug => [ "DEBUG", "_DEBUG" ])),
@ -1655,7 +1655,7 @@ my %targets = (
combine('/GF /Gy',
sub { vc_wince_info()->{cflags}; },
sub { `cl 2>&1` =~ /Version ([0-9]+)\./ && $1>=14
? ($disabled{shared} ? " /MT" : " /MD")
? ($disabled{shared} ? " /MT" : ($disabled{"static-vcruntime"} ? " /MD" : ""))
: " /MC"; }),
cppflags => sub { vc_wince_info()->{cppflags}; },
lib_defines => add("NO_CHMOD", "OPENSSL_SMALL_FOOTPRINT"),

2
Configure
View file

@ -539,6 +539,7 @@ my @disablables = (
"sshkdf",
"sskdf",
"ssl-trace",
"static-vcruntime",
"stdio",
"sslkeylog",
"tests",
@ -627,6 +628,7 @@ our %disabled = ( # "what" => "comment"
"rc5" => "default",
"sctp" => "default",
"sslkeylog" => "default",
"static-vcruntime" => "default",
"tfo" => "default",
"tls-deprecated-ec" => "default",
"trace" => "default",

2
NEWS.md
View file

@ -27,6 +27,8 @@ OpenSSL 4.0
### Major changes between OpenSSL 3.6 and OpenSSL 4.0 [under development]
* Windows supports the use of staic or dynamic vcruntime linkage
* The `OPENSSL_sk_set_cmp_thunks()` call was added to the `STACK_OF` api
* The script tool `c_rehash` was removed. Use `openssl rehash` instead.