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

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch openwrt-23.05:
https://git.openwrt.org/6179b450fb0bd2e3b9e11fc467263da43bc9a703

commit 6179b450fb0bd2e3b9e11fc467263da43bc9a703
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
    (cherry picked from commit 4646aa169986036772b9f75393c08508d20ddf8b)
    Link: https://github.com/openwrt/openwrt/pull/19525
    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 9b169b0693..278d6e29e0 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