git: 8c9e45503fe4 - main - tools/build: Improve host-symlinks failure mode

[Jessica Clarke]

The branch main has been updated by jrtc27:

URL: https://cgit.FreeBSD.org/src/commit/?id=8c9e45503fe41732f72e1a4cc9a231e63b4289ba

commit 8c9e45503fe41732f72e1a4cc9a231e63b4289ba
Author:     Jessica Clarke <jrtc27 at FreeBSD.org>
AuthorDate: 2021-03-20 13:00:34 +0000
Commit:     Jessica Clarke <jrtc27 at FreeBSD.org>
CommitDate: 2021-03-20 13:00:34 +0000

    tools/build: Improve host-symlinks failure mode
    
    Since set -e is enabled by sys.mk, if the tool cannot be found in PATH
    then the entire shell command line fails, causing us to not print the
    error message below and instead silently (due to the @) fail, only
    getting the usual "Error code 1" print from bmake. Thus, provide a dummy
    default that will never exist (the same as is used by meta2deps.sh) if
    which fails so that we get the error message as intended.
    
    MFC after:      1 week
---
 tools/build/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/build/Makefile b/tools/build/Makefile
index effe8b9cb31d..31d027f75ce2 100644
--- a/tools/build/Makefile
+++ b/tools/build/Makefile
@@ -301,7 +301,8 @@ _host_tools_to_symlink:=${_host_tools_to_symlink:Nsh}
 host-symlinks:
 	@echo "Linking host tools into ${DESTDIR}/bin"
 .for _tool in ${_host_tools_to_symlink}
-	@export PATH=$${PATH}:/usr/local/bin; source_path=`which ${_tool}`; \
+	@export PATH=$${PATH}:/usr/local/bin; \
+	source_path=`which ${_tool} || echo /dev/null/no/such`; \
 	if [ ! -e "$${source_path}" ] ; then \
 		echo "Cannot find host tool '${_tool}' in PATH ($$PATH)." >&2; false; \
 	fi; \