[openwrt/openwrt] build: fix CMake generator for non-Ninja builds

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/4646aa169986036772b9f75393c08508d20ddf8b

commit 4646aa169986036772b9f75393c08508d20ddf8b
Author: Ivan Romanov <drizt72 at zoho.eu>
AuthorDate: Mon Aug 26 12:45:38 2024 +0500

    build: fix CMake generator for non-Ninja builds
    
    OpenWRT by default uses the Ninja generator, but some packages disable
    Ninja and use the default Unix Makefiles generator. This generator can
    be overridden in the user environment with `CMAKE_GENERATOR`. This patch
    explicitly sets the correct generator when `PKG_USE_NINJA:=0`.
    
    In particular, the `mt76` package uses the Makefiles generator.
    
    Signed-off-by: Ivan Romanov <drizt72 at zoho.eu>
    Link: https://github.com/openwrt/openwrt/pull/16263
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 include/cmake.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/cmake.mk b/include/cmake.mk
index c82ba5f809..00ade7fd7d 100644
--- a/include/cmake.mk
+++ b/include/cmake.mk
@@ -68,6 +68,8 @@ ifeq ($(HOST_USE_NINJA),1)
   define Host/Uninstall/Default
 	+$(NINJA) -C $(HOST_CMAKE_BINARY_DIR) uninstall
   endef
+else
+  CMAKE_HOST_OPTIONS += -DCMAKE_GENERATOR="Unix Makefiles"
 endif
 
 ifeq ($(PKG_USE_NINJA),1)
@@ -80,6 +82,8 @@ ifeq ($(PKG_USE_NINJA),1)
   define Build/Install/Default
 	+DESTDIR="$(PKG_INSTALL_DIR)" $(NINJA) -C $(CMAKE_BINARY_DIR) install
   endef
+else
+  CMAKE_OPTIONS += -DCMAKE_GENERATOR="Unix Makefiles"
 endif
 
 define Build/Configure/Default