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openwrt/include/cmake.mk
Eneas U de Queiroz e495645135 cmake: set CMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER 
According to CMake documentation[1]:

  [CMAKE_FIND_ROOT_PATH] is a list of directories that contain the
  target environment.

  [CMAKE_FIND_ROOT_PATH_MODE_PROGRAM] sets the default behavior for the
  find_program command.

  In most cases, find_program is used to search for an executable which
  will then be executed, e.g. using execute_process or
  add_custom_command. So in most cases an executable from the build host
  is required, so setting CMAKE_FIND_ROOT_PATH_MODE_PROGRAM to NEVER is
  normally preferred.

Since CMAKE_FIND_ROOT_PATH is set to the target staging dir, and the
toolchain root dir, it will find target programs before the host ones.

An example of this problem is if you try to build antiblock from the
packages feed after llvm from the video feeds is built.  Antiblock will
search for clang-format, pickup the target version, and fail to build.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

[1] https://cmake.org/cmake/help/book/mastering-cmake/chapter/Cross%20Compiling%20With%20CMake.html
Link: https://github.com/openwrt/openwrt/pull/20656

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
2025-11-05 16:57:51 +01:00

186 lines
6.3 KiB
Makefile
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cmake_bool = $(patsubst %,-D%:BOOL=$(if $($(1)),ON,OFF),$(2))
PKG_USE_NINJA ?= 1
HOST_USE_NINJA ?= 1
ifeq ($(PKG_USE_NINJA),1)
PKG_BUILD_PARALLEL ?= 1
endif
ifeq ($(HOST_USE_NINJA),1)
HOST_BUILD_PARALLEL ?= 1
endif
PKG_INSTALL:=1
ifneq ($(findstring c,$(OPENWRT_VERBOSE)),)
MAKE_FLAGS+=VERBOSE=1
HOST_MAKE_FLAGS+=VERBOSE=1
endif
CMAKE_BINARY_DIR = $(PKG_BUILD_DIR)$(if $(CMAKE_BINARY_SUBDIR),/$(CMAKE_BINARY_SUBDIR))
CMAKE_SOURCE_DIR = $(PKG_BUILD_DIR)$(if $(CMAKE_SOURCE_SUBDIR),/$(CMAKE_SOURCE_SUBDIR))
HOST_CMAKE_SOURCE_DIR = $(HOST_BUILD_DIR)$(if $(CMAKE_SOURCE_SUBDIR),/$(CMAKE_SOURCE_SUBDIR))
HOST_CMAKE_BINARY_DIR = $(HOST_BUILD_DIR)$(if $(CMAKE_BINARY_SUBDIR),/$(CMAKE_BINARY_SUBDIR))
MAKE_PATH = $(firstword $(CMAKE_BINARY_SUBDIR) .)
ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
cmake_tool=$(firstword $(TOOLCHAIN_BIN_DIRS))/$(1)
else
cmake_tool=$(shell command -v $(1))
endif
ifeq ($(CONFIG_CCACHE),)
CMAKE_C_COMPILER_LAUNCHER:=
CMAKE_CXX_COMPILER_LAUNCHER:=
CMAKE_C_COMPILER:=$(call cmake_tool,$(TARGET_CC))
CMAKE_CXX_COMPILER:=$(call cmake_tool,$(TARGET_CXX))
CMAKE_HOST_C_COMPILER:=$(HOSTCC)
CMAKE_HOST_CXX_COMPILER:=$(HOSTCXX)
else
CCACHE:=$(STAGING_DIR_HOST)/bin/ccache
CMAKE_C_COMPILER_LAUNCHER:=$(CCACHE)
CMAKE_CXX_COMPILER_LAUNCHER:=$(CCACHE)
CMAKE_C_COMPILER:=$(TARGET_CC_NOCACHE)
CMAKE_CXX_COMPILER:=$(TARGET_CXX_NOCACHE)
CMAKE_HOST_C_COMPILER:=$(HOSTCC_NOCACHE)
CMAKE_HOST_CXX_COMPILER:=$(HOSTCXX_NOCACHE)
endif
CMAKE_AR:=$(call cmake_tool,$(TARGET_AR))
CMAKE_NM:=$(call cmake_tool,$(TARGET_NM))
CMAKE_RANLIB:=$(call cmake_tool,$(TARGET_RANLIB))
CMAKE_FIND_ROOT_PATH:=$(STAGING_DIR)/usr;$(TOOLCHAIN_ROOT_DIR)
CMAKE_HOST_FIND_ROOT_PATH:=$(STAGING_DIR)/host;$(STAGING_DIR_HOSTPKG);$(STAGING_DIR_HOST)
CMAKE_SHARED_LDFLAGS:=-Wl,-Bsymbolic-functions
CMAKE_HOST_INSTALL_PREFIX = $(HOST_BUILD_PREFIX)
ifeq ($(HOST_USE_NINJA),1)
CMAKE_HOST_OPTIONS += -DCMAKE_GENERATOR="Ninja"
define Host/Compile/Default
+$(NINJA) -C $(HOST_CMAKE_BINARY_DIR) $(1)
endef
define Host/Install/Default
+$(NINJA) -C $(HOST_CMAKE_BINARY_DIR) install
endef
define Host/Uninstall/Default
+$(NINJA) -C $(HOST_CMAKE_BINARY_DIR) uninstall
endef
else
CMAKE_HOST_OPTIONS += -DCMAKE_GENERATOR="Unix Makefiles"
endif
ifeq ($(PKG_USE_NINJA),1)
CMAKE_OPTIONS += -DCMAKE_GENERATOR="Ninja"
define Build/Compile/Default
+$(NINJA) -C $(CMAKE_BINARY_DIR) $(1)
endef
define Build/Install/Default
+DESTDIR="$(PKG_INSTALL_DIR)" $(NINJA) -C $(CMAKE_BINARY_DIR) install
endef
else
CMAKE_OPTIONS += -DCMAKE_GENERATOR="Unix Makefiles"
endif
define Build/Configure/Default
mkdir -p $(CMAKE_BINARY_DIR)
(cd $(CMAKE_BINARY_DIR); \
CFLAGS="$(TARGET_CFLAGS) $(EXTRA_CFLAGS)" \
CXXFLAGS="$(TARGET_CXXFLAGS) $(EXTRA_CXXFLAGS)" \
LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS)" \
cmake \
--no-warn-unused-cli \
-DCMAKE_SYSTEM_NAME=Linux \
-DCMAKE_SYSTEM_VERSION=1 \
-DCMAKE_SYSTEM_PROCESSOR=$(ARCH) \
-DCMAKE_BUILD_TYPE=$(if $(CONFIG_DEBUG),RelWithDebInfo,Release) \
-DCMAKE_C_FLAGS_RELEASE="-DNDEBUG" \
-DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG" \
-DCMAKE_C_COMPILER_LAUNCHER="$(CMAKE_C_COMPILER_LAUNCHER)" \
-DCMAKE_C_COMPILER="$(CMAKE_C_COMPILER)" \
-DCMAKE_CXX_COMPILER_LAUNCHER="$(CMAKE_CXX_COMPILER_LAUNCHER)" \
-DCMAKE_CXX_COMPILER="$(CMAKE_CXX_COMPILER)" \
-DCMAKE_ASM_COMPILER_LAUNCHER="$(CMAKE_C_COMPILER_LAUNCHER)" \
-DCMAKE_ASM_COMPILER="$(CMAKE_C_COMPILER)" \
-DCMAKE_EXE_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS)" \
-DCMAKE_MODULE_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS) $(CMAKE_SHARED_LDFLAGS)" \
-DCMAKE_SHARED_LINKER_FLAGS:STRING="$(TARGET_LDFLAGS) $(CMAKE_SHARED_LDFLAGS)" \
-DCMAKE_AR="$(CMAKE_AR)" \
-DCMAKE_NM="$(CMAKE_NM)" \
-DCMAKE_RANLIB="$(CMAKE_RANLIB)" \
-DCMAKE_FIND_ROOT_PATH="$(CMAKE_FIND_ROOT_PATH)" \
-DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER \
-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY \
-DCMAKE_STRIP=: \
-DCMAKE_INSTALL_PREFIX=/usr \
-DDL_LIBRARY=$(STAGING_DIR) \
-DCMAKE_PREFIX_PATH=$(STAGING_DIR) \
-DCMAKE_SKIP_RPATH=TRUE \
-DCMAKE_EXPORT_PACKAGE_REGISTRY=FALSE \
-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=TRUE \
-DCMAKE_FIND_USE_PACKAGE_REGISTRY=FALSE \
-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=TRUE \
-DCMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY=FALSE \
-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=TRUE \
$(CMAKE_OPTIONS) \
$(CMAKE_SOURCE_DIR) \
)
endef
define Build/InstallDev/cmake
$(INSTALL_DIR) $(1)
$(CP) $(PKG_INSTALL_DIR)/* $(1)/
endef
Build/InstallDev = $(if $(CMAKE_INSTALL),$(Build/InstallDev/cmake))
define Host/Configure/Default
mkdir -p "$(HOST_CMAKE_BINARY_DIR)"
(cd $(HOST_CMAKE_BINARY_DIR); \
CFLAGS="$(HOST_CFLAGS)" \
CXXFLAGS="$(HOST_CFLAGS)" \
LDFLAGS="$(HOST_LDFLAGS)" \
cmake \
--no-warn-unused-cli \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_C_COMPILER_LAUNCHER="$(CMAKE_C_COMPILER_LAUNCHER)" \
-DCMAKE_C_COMPILER="$(CMAKE_HOST_C_COMPILER)" \
-DCMAKE_CXX_COMPILER_LAUNCHER="$(CMAKE_CXX_COMPILER_LAUNCHER)" \
-DCMAKE_CXX_COMPILER="$(CMAKE_HOST_CXX_COMPILER)" \
-DCMAKE_ASM_COMPILER_LAUNCHER="$(CMAKE_C_COMPILER_LAUNCHER)" \
-DCMAKE_ASM_COMPILER="$(CMAKE_HOST_C_COMPILER)" \
-DCMAKE_C_FLAGS_RELEASE="-DNDEBUG" \
-DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG" \
-DCMAKE_EXE_LINKER_FLAGS:STRING="$(HOST_LDFLAGS)" \
-DCMAKE_MODULE_LINKER_FLAGS:STRING="$(HOST_LDFLAGS)" \
-DCMAKE_SHARED_LINKER_FLAGS:STRING="$(HOST_LDFLAGS)" \
-DCMAKE_FIND_ROOT_PATH="$(CMAKE_HOST_FIND_ROOT_PATH)" \
-DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=BOTH \
-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY \
-DCMAKE_STRIP=: \
-DCMAKE_INSTALL_PREFIX=$(CMAKE_HOST_INSTALL_PREFIX) \
-DCMAKE_PREFIX_PATH=$(HOST_BUILD_PREFIX) \
-DCMAKE_SKIP_RPATH=TRUE \
-DCMAKE_INSTALL_LIBDIR=lib \
-DCMAKE_EXPORT_PACKAGE_REGISTRY=FALSE \
-DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=TRUE \
-DCMAKE_FIND_USE_PACKAGE_REGISTRY=FALSE \
-DCMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY=TRUE \
-DCMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY=FALSE \
-DCMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY=TRUE \
-DBUILD_SHARED_LIBS=OFF \
$(CMAKE_HOST_OPTIONS) \
$(HOST_CMAKE_SOURCE_DIR) \
)
endef
MAKE_FLAGS += \
CMAKE_COMMAND='$$(if $$(CMAKE_DISABLE_$$@),:,$(STAGING_DIR_HOST)/bin/cmake)' \
CMAKE_DISABLE_cmake_check_build_system=1
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