kumquat-buildroot/support/misc/toolchainfile.cmake.in
Samuel Martin 47544e43a5 toolchainfile.cmake.in: do not force the CMAKE_{C, CXX}_FLAGS to the cache
Fix #7280 [1]

When the FORCE option is passed to the set command, the variable is
added/updated in the CMake cache every single time CMake processes this
command.

Because the toolchainfile.cmake prepends architecture/toolchain flags
to the CMAKE_{C,CXX}_FLAGS, this makes the CFLAGS being updated in the
generated Makefiles each time one reconfigures its project. So it
forces the compilation of everything, even when nothing has changed.

[1] https://bugs.busybox.net/show_bug.cgi?id=7280

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Tested-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
(tested the SimpleApp reproduction scenario described in the bug report)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-09-28 20:57:26 +02:00

58 lines
2.7 KiB
CMake

#
# Automatically generated file; DO NOT EDIT.
# CMake toolchain file for Buildroot
#
# In order to allow the toolchain to be relocated, we calculate the
# HOST_DIR based on this file's location: $(HOST_DIR)/usr/share/buildroot
# and store it in RELOCATED_HOST_DIR.
# All the other variables that need to refer to HOST_DIR will use the
# RELOCATED_HOST_DIR variable.
string(REPLACE "/usr/share/buildroot" "" RELOCATED_HOST_DIR ${CMAKE_CURRENT_LIST_DIR})
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_C_FLAGS "@@TARGET_CFLAGS@@ ${CMAKE_C_FLAGS}" CACHE STRING "Buildroot CFLAGS")
set(CMAKE_CXX_FLAGS "@@TARGET_CXXFLAGS@@ ${CMAKE_CXX_FLAGS}" CACHE STRING "Buildroot CXXFLAGS")
set(CMAKE_EXE_LINKER_FLAGS "@@TARGET_LDFLAGS@@ ${CMAKE_EXE_LINKER_FLAGS}" CACHE STRING "Buildroot LDFLAGS")
set(CMAKE_INSTALL_SO_NO_EXE 0)
set(CMAKE_PROGRAM_PATH "${RELOCATED_HOST_DIR}/usr/bin")
set(CMAKE_FIND_ROOT_PATH "${RELOCATED_HOST_DIR}/@@STAGING_SUBDIR@@")
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(ENV{PKG_CONFIG_SYSROOT_DIR} "${RELOCATED_HOST_DIR}/@@STAGING_SUBDIR@@")
# This toolchain file can be used both inside and outside Buildroot.
# * When used inside Buildroot, ccache support is explicitly driven using the
# USE_CCACHE variable.
# * When used outside Buildroot (i.e. when USE_CCACHE is not defined), ccache
# support is automatically enabled if the ccache program is available.
if(DEFINED USE_CCACHE)
if(USE_CCACHE)
set(CMAKE_ASM_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CC_NOCCACHE@@")
set(CMAKE_C_COMPILER "${RELOCATED_HOST_DIR}/usr/bin/ccache")
set(CMAKE_CXX_COMPILER "${RELOCATED_HOST_DIR}/usr/bin/ccache")
set(CMAKE_C_COMPILER_ARG1 "${RELOCATED_HOST_DIR}/@@TARGET_CC_NOCCACHE@@")
set(CMAKE_CXX_COMPILER_ARG1 "${RELOCATED_HOST_DIR}/@@TARGET_CXX_NOCCACHE@@")
else()
set(CMAKE_C_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CC_NOCCACHE@@")
set(CMAKE_CXX_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CXX_NOCCACHE@@")
endif()
else()
find_program(CCACHE ccache HINTS "${RELOCATED_HOST_DIR}/usr/bin")
if(CCACHE)
set(CMAKE_ASM_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CC_NOCCACHE@@")
set(CMAKE_C_COMPILER "${CCACHE}")
set(CMAKE_CXX_COMPILER "${CCACHE}")
set(CMAKE_C_COMPILER_ARG1 "${RELOCATED_HOST_DIR}/@@TARGET_CC_NOCCACHE@@")
set(CMAKE_CXX_COMPILER_ARG1 "${RELOCATED_HOST_DIR}/@@TARGET_CXX_NOCCACHE@@")
message(STATUS "ccache program has been found and will be used for the build.")
message(STATUS " To disable ccache, add -DUSE_CCACHE=OFF on the cmake command line.")
else()
set(CMAKE_C_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CC_NOCCACHE@@")
set(CMAKE_CXX_COMPILER "${RELOCATED_HOST_DIR}/@@TARGET_CXX_NOCCACHE@@")
endif()
endif()