[gentoo-dev] [PATCH 4/4] ninja-utils.eclass: Warn if NINJAOPTS diable jobserver support

[Michał Górny]

Warn if NINJAOPTS specifies "-j" option and a jobserver is available,
since it will implicitly disable the jobserver support.

Bug: https://bugs.gentoo.org/692576
Signed-off-by: Michał Górny <mgo...@gentoo.org>
---
 eclass/ninja-utils.eclass | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/eclass/ninja-utils.eclass b/eclass/ninja-utils.eclass
index 0899d9cd41e95..7142cc8cd9da9 100644
--- a/eclass/ninja-utils.eclass
+++ b/eclass/ninja-utils.eclass
@@ -116,6 +116,9 @@ get_NINJAOPTS() {
                        # ninja only uses jobserver if -j is not passed
                        NINJAOPTS+=" -j$(get_makeopts_jobs 999)"
                fi
+       elif _ninja_uses_jobserver && [[ ${NINJAOPTS} == *-j* ]]; then
+               ewarn "Jobserver detected, but NINJAOPTS specifies -j option."
+               ewarn "To enable ninja jobserver support, remove -j from 
NINJAOPTS."
        fi
        echo "${NINJAOPTS}"
 }