[pkg-lua-devel] Bug#1057812: luajit2 FTCBFS: passes host flags to build compiler

[Helmut Grohne]

Source: luajit2
Version: 2.1-20230410-1
Tags: patch
User: debian-cross at lists.debian.org
Usertags: ftcbfs

luajit2 fails to cross build from source. Unfortunately, the
nomenclature gets really confusing here, so let me clarify:

Debian | luajit2
-------+--------
build  | host
host   | target
target | -

Hencefore, I am assuming Debian's meaning. So luajit2 passes host flags
to the build compiler. This happen both during clean (as dh_auto_clean
doesn't pass cross tools yet picks up CFLAGS) and during build (because
CFLAGS automatically promote to both kinds of flags). I'm attaching a
patch that fixes both for your convenience.

Helmut
-------------- next part --------------
diff --minimal -Nru luajit2-2.1-20230410/debian/changelog luajit2-2.1-20230410/debian/changelog
--- luajit2-2.1-20230410/debian/changelog	2023-06-18 03:26:28.000000000 +0200
+++ luajit2-2.1-20230410/debian/changelog	2023-12-08 13:49:40.000000000 +0100
@@ -1,3 +1,10 @@
+luajit2 (2.1-20230410-1.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix FTCBFS: Be more precise about build/host/target. (Closes: #-1)
+
+ -- Helmut Grohne <helmut at subdivi.de>  Fri, 08 Dec 2023 13:49:40 +0100
+
 luajit2 (2.1-20230410-1) unstable; urgency=medium
 
   [ Debian Janitor ]
diff --minimal -Nru luajit2-2.1-20230410/debian/rules luajit2-2.1-20230410/debian/rules
--- luajit2-2.1-20230410/debian/rules	2023-02-28 19:24:49.000000000 +0100
+++ luajit2-2.1-20230410/debian/rules	2023-12-08 13:49:40.000000000 +0100
@@ -10,10 +10,16 @@
 %:
 	dh $@
 
+override_dh_auto_clean:
+	dh_auto_clean -- CROSS=$(DEB_HOST_GNU_TYPE)-
+
 override_dh_auto_build:
 	$(MAKE) amalg PREFIX=/usr \
 		MULTILIB=lib/$(DEB_HOST_MULTIARCH) \
 		CROSS=$(DEB_HOST_GNU_TYPE)- \
+		CFLAGS= \
+		HOST_CFLAGS='$(CFLAGS_FOR_BUILD)' \
+		TARGET_CFLAGS='$(CFLAGS)' \
 		Q= E=@:
 
 override_dh_auto_install: