[PATCH] lib/common.mk: move .POSIX out

[Alyssa Ross <hi@alyssa.is>]

The standard says the following, so I don't think it's specified that
it's allowed to be in an include file:

> If it appears as the first non-comment line in the makefile, make
> shall process the makefile as specified by this section; otherwise,
> the behavior of make is unspecified.

Link: https://pubs.opengroup.org/onlinepubs/9799919799/utilities/make.html#tag_20_76_13_04
Fixes: c3fbeca ("lib/common.mk: init")
Signed-off-by: Alyssa Ross <hi@alyssa.is>
---
 host/initramfs/Makefile | 2 ++
 host/rootfs/Makefile    | 2 ++
 img/app/Makefile        | 2 ++
 lib/common.mk           | 2 --
 release/live/Makefile   | 2 ++
 vm/sys/net/Makefile     | 2 ++
 6 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/host/initramfs/Makefile b/host/initramfs/Makefile
index 06f69b3..8382296 100644
--- a/host/initramfs/Makefile
+++ b/host/initramfs/Makefile
@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: EUPL-1.2+
 # SPDX-FileCopyrightText: 2021-2023 Alyssa Ross <hi@alyssa.is>
 
+.POSIX:
+
 include ../../lib/common.mk
 
 dest = build/initramfs
diff --git a/host/rootfs/Makefile b/host/rootfs/Makefile
index f4fb7a4..2f4445d 100644
--- a/host/rootfs/Makefile
+++ b/host/rootfs/Makefile
@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: EUPL-1.2+
 # SPDX-FileCopyrightText: 2021-2024 Alyssa Ross <hi@alyssa.is>
 
+.POSIX:
+
 include ../../lib/common.mk
 
 dest = build/rootfs.erofs
diff --git a/img/app/Makefile b/img/app/Makefile
index 3adf8c4..79dd22e 100644
--- a/img/app/Makefile
+++ b/img/app/Makefile
@@ -2,6 +2,8 @@
 # SPDX-FileCopyrightText: 2021-2024 Alyssa Ross <hi@alyssa.is>
 # SPDX-FileCopyrightText: 2022 Unikie
 
+.POSIX:
+
 include ../../lib/common.mk
 
 prefix = build/host
diff --git a/lib/common.mk b/lib/common.mk
index 8f11ecc..7733878 100644
--- a/lib/common.mk
+++ b/lib/common.mk
@@ -1,8 +1,6 @@
 # SPDX-License-Identifier: EUPL-1.2+
 # SPDX-FileCopyrightText: 2021, 2023 Alyssa Ross <hi@alyssa.is>
 
-.POSIX:
-
 # qemu-kvm is non-standard, but is present in at least Fedora and
 # Nixpkgs.  If you don't have qemu-kvm, you'll need to set e.g.
 # QEMU_KVM = qemu-system-x86_64 -enable-kvm.
diff --git a/release/live/Makefile b/release/live/Makefile
index f45870d..a8c81c3 100644
--- a/release/live/Makefile
+++ b/release/live/Makefile
@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: EUPL-1.2+
 # SPDX-FileCopyrightText: 2021-2023 Alyssa Ross <hi@alyssa.is>
 
+.POSIX:
+
 include ../../lib/common.mk
 
 dest = build/live.img
diff --git a/vm/sys/net/Makefile b/vm/sys/net/Makefile
index 00757db..2c2f084 100644
--- a/vm/sys/net/Makefile
+++ b/vm/sys/net/Makefile
@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: EUPL-1.2+
 # SPDX-FileCopyrightText: 2021-2024 Alyssa Ross <hi@alyssa.is>
 
+.POSIX:
+
 include ../../../lib/common.mk
 
 prefix = build/svc

base-commit: 0f5cfe23285d31c3f7ea1d0fbca967fa8bae8d59
-- 
2.45.2