git: f12e86a205c8 - stable/13 - tools/build/make.py: fix cross build on Fedora Linux

The branch stable/13 has been updated by alfredo:

URL: https://cgit.FreeBSD.org/src/commit/?id=f12e86a205c8577a8f8bd9f9955fed78f658c004

commit f12e86a205c8577a8f8bd9f9955fed78f658c004
Author:     Alfredo Dal'Ava Junior <alfredo@FreeBSD.org>
AuthorDate: 2022-11-01 23:59:58 +0000
Commit:     Alfredo Dal'Ava Junior <alfredo@FreeBSD.org>
CommitDate: 2022-11-08 03:29:58 +0000

    tools/build/make.py: fix cross build on Fedora Linux
    
    Fedora defines shell functions for some commands used by FreeBSD build
    scripts. Unortunatelly it makes them behave incorrectly for our purposes.
    
    For instance 'which which' returns something like:
    
    which ()
    {
        ( alias;
        eval ${which_declare} ) | /usr/bin/which --tty-only --read-alias ...
    }
    
    instead of
    
    /usr/bin/which
    
    This patch unsets those functions to restore original/expected behavior
    
    Reviewed by:    emaste, imp
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D36900
    
    (cherry picked from commit b7ac17b48bdfc688b54b29aa4feacb535c91aec2)
---
 tools/build/make.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/build/make.py b/tools/build/make.py
index 799ea89b74b3..cede0c99e316 100755
--- a/tools/build/make.py
+++ b/tools/build/make.py
@@ -267,5 +267,13 @@ if __name__ == "__main__":
         shlex.quote(s) for s in [str(bmake_binary)] + bmake_args)
     debug("Running `env ", env_cmd_str, " ", make_cmd_str, "`", sep="")
     os.environ.update(new_env_vars)
+
+    # Fedora defines bash function wrapper for some shell commands and this
+    # makes 'which <command>' return the function's source code instead of
+    # the binary path. Undefine it to restore the original behavior.
+    os.unsetenv("BASH_FUNC_which%%")
+    os.unsetenv("BASH_FUNC_ml%%")
+    os.unsetenv("BASH_FUNC_module%%")
+
     os.chdir(str(source_root))
     os.execv(str(bmake_binary), [str(bmake_binary)] + bmake_args)