PATCH: Intel C++ for Linux ABI update

.ci/azp-linux-extra.yml

@@ -18,3 +18,4 @@ steps:
   - { bash: "./.ci/b2_example.sh example/hello", displayName: "example/hello" }
   - { bash: "./.ci/b2_example.sh example/libraries", displayName: "example/libraries" }
   - { bash: "./.ci/b2_example.sh example/make", displayName: "example/make" }
+  - { bash: "./.ci/b2_example.sh example/icx", displayName: "example/icx" }

.ci/azp-linux-prep-container.yml

@@ -4,6 +4,7 @@ steps:
     target: host
     inputs:
       script: |
+        /usr/bin/docker pull intel/oneapi
         /usr/bin/docker exec -t -u root container mv /etc/sudoers /etc/sudoers.bak
         /usr/bin/docker exec -t -u root container apt-get -qq update
         /usr/bin/docker exec -t -u root container apt-get -qq install sudo

example/icx/hello.cpp

@@ -0,0 +1,15 @@
+//  Copyright (c) 2003 Vladimir Prus
+//  Copyright (c) 2026 Amlal El Mahrouss
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE.txt or copy at
+//  https://www.bfgroup.xyz/b2/LICENSE.txt)
+
+// tag::source[]
+#include <iostream>
+
+int main()
+{
+    std::cout << "Hello ICX!\n";
+}
+// end::source[]

example/icx/jamroot.jam

@@ -0,0 +1,6 @@
+using intel-linux : : icx ;
+
+project : default-build <toolset>intel-linux ;
+
+exe hello : hello.cpp :
+    <cxxflags>-ipo <linkflags>-ipo ;

example/icx/readme.adoc

@@ -0,0 +1,51 @@
+////
+Copyright 2008 Jurko Gospodnetic
+Copyright 2017 Rene Rivera
+Copyright 2026 Amlal El Mahrouss
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.txt or https://www.bfgroup.xyz/b2/LICENSE.txt)
+////
+
+= Note
+
+This is a specific example for the Intel C++ Compiler (icx) for testing purposes.
+
+= Hello
+
+This example shows a very basic Boost Build project set up so it compiles a
+single executable from a single source file:
+
+.`hello.cpp`
+[source,cpp]
+----
+include::../../example/hello/hello.cpp[tag=source]
+----
+
+Our `jamroot.jam` is minimal and only specifies one `exe` target for the
+program:
+
+.`jamroot.jam`
+[source,jam]
+----
+include::jamroot.jam[]
+----
+
+Building the example yields:
+
+[source,bash]
+----
+> cd /example/hello
+> b2
+...found 8 targets...
+...updating 4 targets...
+common.mkdir bin/clang-darwin-4.2.1
+common.mkdir bin/clang-darwin-4.2.1/debug
+clang-darwin.compile.c++ bin/clang-darwin-4.2.1/debug/hello.o
+clang-darwin.link bin/clang-darwin-4.2.1/debug/hello
+...updated 4 targets...
+> bin/clang-darwin-4.2.1/debug/hello
+Hello!
+----
+
+NOTE: The actual paths in the `bin` sub-directory will depend on your
+toolset.

src/tools/intel-linux.jam

@@ -195,23 +195,23 @@ rule init ( version ? :  command * : options * )
         flags intel-linux.compile OPTIONS $(condition)/<inlining>on : "-Ob1" ;
         flags intel-linux.compile OPTIONS $(condition)/<inlining>full : "-Ob2" ;
         flags intel-linux.compile OPTIONS $(condition)/<optimization>space : "-O1" ;
-        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ip" ;
+        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ipo" ;
     }
     else if [ numbers.less $(tool_version[1]) 11 ]
     {
         flags intel-linux.compile OPTIONS $(condition)/<inlining>off : "-inline-level=0" ;
         flags intel-linux.compile OPTIONS $(condition)/<inlining>on : "-inline-level=1" ;
         flags intel-linux.compile OPTIONS $(condition)/<inlining>full : "-inline-level=2" ;
         flags intel-linux.compile OPTIONS $(condition)/<optimization>space : "-O1" ;
-        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ip" ;
+        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ipo" ;
     }
     else # newer version of intel do have -Os (at least 11+, don't know about 10)
     {
         flags intel-linux.compile OPTIONS $(condition)/<inlining>off : "-inline-level=0" ;
         flags intel-linux.compile OPTIONS $(condition)/<inlining>on : "-inline-level=1" ;
         flags intel-linux.compile OPTIONS $(condition)/<inlining>full : "-inline-level=2" ;
         flags intel-linux.compile OPTIONS $(condition)/<optimization>space : "-Os" ;
-        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ip" ;
+        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ipo" ;
     }
     if [ numbers.less $(tool_version[1]) 2020 ]
     {