prereq-build: add check for true and false

Some uses cases, like with autotools, need a path for 'true'
if we use them to force something to skip.

This will work by default on Linux hosts,
and require MacOS hosts to get coreutils,
which is currently installed in the CI
for 'macos-latest' host.

In the future, prereq stage can be reworked
to search for the actual binary
instead of relying on env.

Signed-off-by: Michael Pratt <mcpratt@pm.me>

1 files changed, 8 insertions, 0 deletions

diff --git a/rules.mk b/rules.mk
index 57d7995d4f..cc7904ac72 100644
--- a/rules.mk
+++ b/rules.mk
@@ -268,6 +268,14 @@ FIND:=find
 PATCH:=patch
 PYTHON:=python3
 
+ifeq ($(HOST_OS),Darwin)
+  TRUE:=/usr/bin/env gtrue
+  FALSE:=/usr/bin/env gfalse
+else
+  TRUE:=/usr/bin/env true
+  FALSE:=/usr/bin/env false
+endif
+
 INSTALL_BIN:=install -m0755
 INSTALL_SUID:=install -m4755
 INSTALL_DIR:=install -d -m0755