buildroot/_buildroot/engine0040/_external-toolchain/toolchain/toolchain-external/pkg-toolchain-external.mk

   1 ################################################################################
   2 # External toolchain package infrastructure
   3 #
   4 # This package infrastructure implements the support for external
   5 # toolchains, i.e toolchains that are available pre-built, ready to
   6 # use. Such toolchain may either be readily available on the Web
   7 # (Linaro, Sourcery CodeBench, from processor vendors) or may be built
   8 # with tools like Crosstool-NG or Buildroot itself. So far, we have
   9 # tested this with:
  10 #
  11 #  * Toolchains generated by Crosstool-NG
  12 #  * Toolchains generated by Buildroot
  13 #  * Toolchains provided by Linaro for the ARM and AArch64
  14 #    architectures
  15 #  * Sourcery CodeBench toolchains (from Mentor Graphics) for the ARM,
  16 #    MIPS, PowerPC, x86, x86_64 and NIOS 2 architectures. For the MIPS
  17 #    toolchain, the -muclibc variant isn't supported yet, only the
  18 #    default glibc-based variant is.
  19 #  * Xilinx toolchains for the Microblaze architecture
  20 #  * Synopsys DesignWare toolchains for ARC cores
  21 #
  22 # The basic principle is the following
  23 #
  24 #  1. If the toolchain is not pre-installed, download and extract it
  25 #  in $(TOOLCHAIN_EXTERNAL_INSTALL_DIR). Otherwise,
  26 #  $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) points to were the toolchain has
  27 #  already been installed by the user.
  28 #
  29 #  2. For all external toolchains, perform some checks on the
  30 #  conformity between the toolchain configuration described in the
  31 #  Buildroot menuconfig system, and the real configuration of the
  32 #  external toolchain. This is for example important to make sure that
  33 #  the Buildroot configuration system knows whether the toolchain
  34 #  supports RPC, IPv6, locales, large files, etc. Unfortunately, these
  35 #  things cannot be detected automatically, since the value of these
  36 #  options (such as BR2_TOOLCHAIN_HAS_NATIVE_RPC) are needed at
  37 #  configuration time because these options are used as dependencies
  38 #  for other options. And at configuration time, we are not able to
  39 #  retrieve the external toolchain configuration.
  40 #
  41 #  3. Copy the libraries needed at runtime to the target directory,
  42 #  $(TARGET_DIR). Obviously, things such as the C library, the dynamic
  43 #  loader and a few other utility libraries are needed if dynamic
  44 #  applications are to be executed on the target system.
  45 #
  46 #  4. Copy the libraries and headers to the staging directory. This
  47 #  will allow all further calls to gcc to be made using --sysroot
  48 #  $(STAGING_DIR), which greatly simplifies the compilation of the
  49 #  packages when using external toolchains. So in the end, only the
  50 #  cross-compiler binaries remains external, all libraries and headers
  51 #  are imported into the Buildroot tree.
  52 #
  53 #  5. Build a toolchain wrapper which executes the external toolchain
  54 #  with a number of arguments (sysroot/march/mtune/..) hardcoded,
  55 #  so we're sure the correct configuration is always used and the
  56 #  toolchain behaves similar to an internal toolchain.
  57 #  This toolchain wrapper and symlinks are installed into
  58 #  $(HOST_DIR)/usr/bin like for the internal toolchains, and the rest
  59 #  of Buildroot is handled identical for the 2 toolchain types.
  60 ################################################################################
  61
  62 #
  63 # Definitions of where the toolchain can be found
  64 #
  65
  66 TOOLCHAIN_EXTERNAL_PREFIX = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))
  67 TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR = $(HOST_DIR)/opt/ext-toolchain
  68
  69 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
  70 TOOLCHAIN_EXTERNAL_INSTALL_DIR = $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)
  71 else
  72 TOOLCHAIN_EXTERNAL_INSTALL_DIR = $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PATH))
  73 endif
  74
  75 ifeq ($(TOOLCHAIN_EXTERNAL_INSTALL_DIR),)
  76 ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
  77 # if no path set, figure it out from path
  78 TOOLCHAIN_EXTERNAL_BIN := $(shell dirname $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
  79 endif
  80 else
  81 TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/bin
  82 endif
  83
  84 # If this is a buildroot toolchain, it already has a wrapper which we want to
  85 # bypass. Since this is only evaluated after it has been extracted, we can use
  86 # $(wildcard ...) here.
  87 TOOLCHAIN_EXTERNAL_SUFFIX = \
  88         $(if $(wildcard $(TOOLCHAIN_EXTERNAL_BIN)/*.br_real),.br_real)
  89
  90 TOOLCHAIN_EXTERNAL_CROSS = $(TOOLCHAIN_EXTERNAL_BIN)/$(TOOLCHAIN_EXTERNAL_PREFIX)-
  91 TOOLCHAIN_EXTERNAL_CC = $(TOOLCHAIN_EXTERNAL_CROSS)gcc$(TOOLCHAIN_EXTERNAL_SUFFIX)
  92 TOOLCHAIN_EXTERNAL_CXX = $(TOOLCHAIN_EXTERNAL_CROSS)g++$(TOOLCHAIN_EXTERNAL_SUFFIX)
  93 TOOLCHAIN_EXTERNAL_FC = $(TOOLCHAIN_EXTERNAL_CROSS)gfortran$(TOOLCHAIN_EXTERNAL_SUFFIX)
  94 TOOLCHAIN_EXTERNAL_READELF = $(TOOLCHAIN_EXTERNAL_CROSS)readelf
  95
  96 # Normal handling of downloaded toolchain tarball extraction.
  97 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
  98 # As a regular package, the toolchain gets extracted in $(@D), but
  99 # since it's actually a fairly special package, we need it to be moved
 100 # into TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR.
 101 define TOOLCHAIN_EXTERNAL_MOVE
 102         rm -rf $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)
 103         mkdir -p $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)
 104         mv $(@D)/* $(TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR)/
 105 endef
 106 endif
 107
 108 #
 109 # Definitions of the list of libraries that should be copied to the target.
 110 #
 111 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC)$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC),y)
 112 TOOLCHAIN_EXTERNAL_LIBS += libatomic.so.* libc.so.* libcrypt.so.* libdl.so.* libgcc_s.so.* libm.so.* libnsl.so.* libresolv.so.* librt.so.* libutil.so.*
 113 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC)$(BR2_ARM_EABIHF),yy)
 114 TOOLCHAIN_EXTERNAL_LIBS += ld-linux-armhf.so.*
 115 else
 116 TOOLCHAIN_EXTERNAL_LIBS += ld*.so.*
 117 endif
 118 ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
 119 TOOLCHAIN_EXTERNAL_LIBS += libpthread.so.*
 120 ifneq ($(BR2_PACKAGE_GDB)$(BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY),)
 121 TOOLCHAIN_EXTERNAL_LIBS += libthread_db.so.*
 122 endif # gdbserver
 123 endif # ! no threads
 124 endif
 125
 126 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC),y)
 127 TOOLCHAIN_EXTERNAL_LIBS += libnss_files.so.* libnss_dns.so.* libmvec.so.* libanl.so.*
 128 endif
 129
 130 ifeq ($(BR2_TOOLCHAIN_EXTERNAL_MUSL),y)
 131 TOOLCHAIN_EXTERNAL_LIBS += libc.so libgcc_s.so.*
 132 endif
 133
 134 ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
 135 TOOLCHAIN_EXTERNAL_LIBS += libstdc++.so.*
 136 endif
 137
 138 ifeq ($(BR2_TOOLCHAIN_HAS_FORTRAN),y)
 139 TOOLCHAIN_EXTERNAL_LIBS += libgfortran.so.*
 140 # fortran needs quadmath on x86 and x86_64
 141 ifeq ($(BR2_TOOLCHAIN_HAS_LIBQUADMATH),y)
 142 TOOLCHAIN_EXTERNAL_LIBS += libquadmath.so*
 143 endif
 144 endif
 145
 146
 147 #
 148 # Definition of the CFLAGS to use with the external toolchain, as well as the
 149 # common toolchain wrapper build arguments
 150 #
 151 ifeq ($(call qstrip,$(BR2_GCC_TARGET_CPU_REVISION)),)
 152 CC_TARGET_CPU_ := $(call qstrip,$(BR2_GCC_TARGET_CPU))
 153 else
 154 CC_TARGET_CPU_ := $(call qstrip,$(BR2_GCC_TARGET_CPU)-$(BR2_GCC_TARGET_CPU_REVISION))
 155 endif
 156 CC_TARGET_ARCH_ := $(call qstrip,$(BR2_GCC_TARGET_ARCH))
 157 CC_TARGET_ABI_ := $(call qstrip,$(BR2_GCC_TARGET_ABI))
 158 CC_TARGET_FPU_ := $(call qstrip,$(BR2_GCC_TARGET_FPU))
 159 CC_TARGET_FLOAT_ABI_ := $(call qstrip,$(BR2_GCC_TARGET_FLOAT_ABI))
 160 CC_TARGET_MODE_ := $(call qstrip,$(BR2_GCC_TARGET_MODE))
 161
 162 # march/mtune/floating point mode needs to be passed to the external toolchain
 163 # to select the right multilib variant
 164 ifeq ($(BR2_x86_64),y)
 165 TOOLCHAIN_EXTERNAL_CFLAGS += -m64
 166 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_64
 167 endif
 168 ifneq ($(CC_TARGET_ARCH_),)
 169 TOOLCHAIN_EXTERNAL_CFLAGS += -march=$(CC_TARGET_ARCH_)
 170 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_ARCH='"$(CC_TARGET_ARCH_)"'
 171 endif
 172 ifneq ($(CC_TARGET_CPU_),)
 173 TOOLCHAIN_EXTERNAL_CFLAGS += -mcpu=$(CC_TARGET_CPU_)
 174 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_CPU='"$(CC_TARGET_CPU_)"'
 175 endif
 176 ifneq ($(CC_TARGET_ABI_),)
 177 TOOLCHAIN_EXTERNAL_CFLAGS += -mabi=$(CC_TARGET_ABI_)
 178 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_ABI='"$(CC_TARGET_ABI_)"'
 179 endif
 180 ifneq ($(CC_TARGET_FPU_),)
 181 TOOLCHAIN_EXTERNAL_CFLAGS += -mfpu=$(CC_TARGET_FPU_)
 182 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_FPU='"$(CC_TARGET_FPU_)"'
 183 endif
 184 ifneq ($(CC_TARGET_FLOAT_ABI_),)
 185 TOOLCHAIN_EXTERNAL_CFLAGS += -mfloat-abi=$(CC_TARGET_FLOAT_ABI_)
 186 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_FLOAT_ABI='"$(CC_TARGET_FLOAT_ABI_)"'
 187 endif
 188 ifneq ($(CC_TARGET_MODE_),)
 189 TOOLCHAIN_EXTERNAL_CFLAGS += -m$(CC_TARGET_MODE_)
 190 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_MODE='"$(CC_TARGET_MODE_)"'
 191 endif
 192 ifeq ($(BR2_BINFMT_FLAT),y)
 193 TOOLCHAIN_EXTERNAL_CFLAGS += -Wl,-elf2flt
 194 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_BINFMT_FLAT
 195 endif
 196 ifeq ($(BR2_mipsel)$(BR2_mips64el),y)
 197 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_MIPS_TARGET_LITTLE_ENDIAN
 198 TOOLCHAIN_EXTERNAL_CFLAGS += -EL
 199 endif
 200 ifeq ($(BR2_mips)$(BR2_mips64),y)
 201 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_MIPS_TARGET_BIG_ENDIAN
 202 TOOLCHAIN_EXTERNAL_CFLAGS += -EB
 203 endif
 204 ifeq ($(BR2_arceb),y)
 205 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_ARC_TARGET_BIG_ENDIAN
 206 TOOLCHAIN_EXTERNAL_CFLAGS += -EB
 207 endif
 208
 209 TOOLCHAIN_EXTERNAL_CFLAGS += $(call qstrip,$(BR2_TARGET_OPTIMIZATION))
 210
 211 ifeq ($(BR2_SOFT_FLOAT),y)
 212 TOOLCHAIN_EXTERNAL_CFLAGS += -msoft-float
 213 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += -DBR_SOFTFLOAT=1
 214 endif
 215
 216 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += \
 217         -DBR_CROSS_PATH_SUFFIX='"$(TOOLCHAIN_EXTERNAL_SUFFIX)"'
 218
 219 ifeq ($(filter $(HOST_DIR)/%,$(TOOLCHAIN_EXTERNAL_BIN)),)
 220 # TOOLCHAIN_EXTERNAL_BIN points outside HOST_DIR => absolute path
 221 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += \
 222         -DBR_CROSS_PATH_ABS='"$(TOOLCHAIN_EXTERNAL_BIN)"'
 223 else
 224 # TOOLCHAIN_EXTERNAL_BIN points inside HOST_DIR => relative path
 225 TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS += \
 226         -DBR_CROSS_PATH_REL='"$(TOOLCHAIN_EXTERNAL_BIN:$(HOST_DIR)/%=%)"'
 227 endif
 228
 229
 230 #
 231 # The following functions creates the symbolic links needed to get the
 232 # cross-compilation tools visible in $(HOST_DIR)/usr/bin. Some of
 233 # links are done directly to the corresponding tool in the external
 234 # toolchain installation directory, while some other links are done to
 235 # the toolchain wrapper (preprocessor, C, C++ and Fortran compiler)
 236 #
 237 # We skip gdb symlink when we are building our own gdb to prevent two
 238 # gdb's in $(HOST_DIR)/usr/bin.
 239 #
 240 # The LTO support in gcc creates wrappers for ar, ranlib and nm which load
 241 # the lto plugin. These wrappers are called *-gcc-ar, *-gcc-ranlib, and
 242 # *-gcc-nm and should be used instead of the real programs when -flto is
 243 # used. However, we should not add the toolchain wrapper for them, and they
 244 # match the *cc-* pattern. Therefore, an additional case is added for *-ar,
 245 # *-ranlib and *-nm.
 246 define TOOLCHAIN_EXTERNAL_INSTALL_WRAPPER
 247         $(Q)cd $(HOST_DIR)/usr/bin; \
 248         for i in $(TOOLCHAIN_EXTERNAL_CROSS)*; do \
 249                 base=$${i##*/}; \
 250                 case "$$base" in \
 251                 *-ar|*-ranlib|*-nm) \
 252                         ln -sf $$(echo $$i | sed 's%^$(HOST_DIR)%../..%') .; \
 253                         ;; \
 254                 *cc|*cc-*|*++|*++-*|*cpp|*-gfortran) \
 255                         ln -sf toolchain-wrapper $$base; \
 256                         ;; \
 257                 *gdb|*gdbtui) \
 258                         if test "$(BR2_PACKAGE_HOST_GDB)" != "y"; then \
 259                                 ln -sf $$(echo $$i | sed 's%^$(HOST_DIR)%../..%') .; \
 260                         fi \
 261                         ;; \
 262                 *) \
 263                         ln -sf $$(echo $$i | sed 's%^$(HOST_DIR)%../..%') .; \
 264                         ;; \
 265                 esac; \
 266         done
 267 endef
 268
 269
 270 # Various utility functions used by the external toolchain package
 271 # infrastructure. Those functions are mainly responsible for:
 272 #
 273 #   - installation the toolchain libraries to $(TARGET_DIR)
 274 #   - copying the toolchain sysroot to $(STAGING_DIR)
 275 #   - installing a gdbinit file
 276 #
 277 # Details about sysroot directory selection.
 278 #
 279 # To find the sysroot directory, we use the trick of looking for the
 280 # 'libc.a' file with the -print-file-name gcc option, and then
 281 # mangling the path to find the base directory of the sysroot.
 282 #
 283 # Note that we do not use the -print-sysroot option, because it is
 284 # only available since gcc 4.4.x, and we only recently dropped support
 285 # for 4.2.x and 4.3.x.
 286 #
 287 # When doing this, we don't pass any option to gcc that could select a
 288 # multilib variant (such as -march) as we want the "main" sysroot,
 289 # which contains all variants of the C library in the case of multilib
 290 # toolchains. We use the TARGET_CC_NO_SYSROOT variable, which is the
 291 # path of the cross-compiler, without the --sysroot=$(STAGING_DIR),
 292 # since what we want to find is the location of the original toolchain
 293 # sysroot. This "main" sysroot directory is stored in SYSROOT_DIR.
 294 #
 295 # Then, multilib toolchains are a little bit more complicated, since
 296 # they in fact have multiple sysroots, one for each variant supported
 297 # by the toolchain. So we need to find the particular sysroot we're
 298 # interested in.
 299 #
 300 # To do so, we ask the compiler where its sysroot is by passing all
 301 # flags (including -march and al.), except the --sysroot flag since we
 302 # want to the compiler to tell us where its original sysroot
 303 # is. ARCH_SUBDIR will contain the subdirectory, in the main
 304 # SYSROOT_DIR, that corresponds to the selected architecture
 305 # variant. ARCH_SYSROOT_DIR will contain the full path to this
 306 # location.
 307 #
 308 # One might wonder why we don't just bother with ARCH_SYSROOT_DIR. The
 309 # fact is that in multilib toolchains, the header files are often only
 310 # present in the main sysroot, and only the libraries are available in
 311 # each variant-specific sysroot directory.
 312
 313
 314 # toolchain_find_sysroot returns the sysroot location for the given
 315 # compiler + flags. We need to handle cases where libc.a is in:
 316 #
 317 #  - lib/
 318 #  - usr/lib/
 319 #  - lib32/
 320 #  - lib64/
 321 #  - lib32-fp/ (Cavium toolchain)
 322 #  - lib64-fp/ (Cavium toolchain)
 323 #  - usr/lib/<tuple>/ (Linaro toolchain)
 324 #
 325 # And variations on these.
 326 define toolchain_find_sysroot
 327 $$(printf $(call toolchain_find_libc_a,$(1)) | sed -r -e 's:(usr/)?lib(32|64)?([^/]*)?/([^/]*/)?libc\.a::')
 328 endef
 329
 330 # Returns the lib subdirectory for the given compiler + flags (i.e
 331 # typically lib32 or lib64 for some toolchains)
 332 define toolchain_find_libdir
 333 $$(printf $(call toolchain_find_libc_a,$(1)) | sed -r -e 's:.*/(usr/)?(lib(32|64)?([^/]*)?(/[^/]*)?)/libc.a:\2:')
 334 endef
 335
 336 # Returns the location of the libc.a file for the given compiler + flags
 337 define toolchain_find_libc_a
 338 $$(readlink -f $$(LANG=C $(1) -print-file-name=libc.a))
 339 endef
 340
 341 # Integration of the toolchain into Buildroot: find the main sysroot
 342 # and the variant-specific sysroot, then copy the needed libraries to
 343 # the $(TARGET_DIR) and copy the whole sysroot (libraries and headers)
 344 # to $(STAGING_DIR).
 345 #
 346 # Variables are defined as follows:
 347 #
 348 # SYSROOT_DIR:          the main sysroot directory, deduced from the location of
 349 #                       the libc.a file in the default multilib variant, by
 350 #                       removing the usr/lib[32|64]/libc.a part of the path.
 351 #                       Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/
 352 #
 353 # ARCH_SYSROOT_DIR:     the sysroot of the selected multilib variant,
 354 #                       deduced from the location of the libc.a file in the
 355 #                       selected multilib variant (taking into account the
 356 #                       CFLAGS), by removing usr/lib[32|64]/libc.a at the end
 357 #                       of the path.
 358 #                       Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/mips16/soft-float/el/
 359 #
 360 # ARCH_LIB_DIR:         'lib', 'lib32' or 'lib64' depending on where libraries
 361 #                       are stored. Deduced from the location of the libc.a file
 362 #                       in the selected multilib variant, by looking at
 363 #                       usr/lib??/libc.a.
 364 #                       Ex: lib
 365 #
 366 # ARCH_SUBDIR:          the relative location of the sysroot of the selected
 367 #                       multilib variant compared to the main sysroot.
 368 #                       Ex: mips16/soft-float/el
 369 #
 370 # SUPPORT_LIB_DIR:      some toolchains, such as recent Linaro toolchains,
 371 #                       store GCC support libraries (libstdc++,
 372 #                       libgcc_s, etc.) outside of the sysroot. In
 373 #                       this case, SUPPORT_LIB_DIR is set to a
 374 #                       non-empty value, and points to the directory
 375 #                       where these support libraries are
 376 #                       available. Those libraries will be copied to
 377 #                       our sysroot, and the directory will also be
 378 #                       considered when searching libraries for copy
 379 #                       to the target filesystem.
 380 #
 381 # Please be very careful to check the major toolchain sources:
 382 # Buildroot, Crosstool-NG, CodeSourcery and Linaro
 383 # before doing any modification on the below logic.
 384
 385 ################################################################################
 386 # inner-toolchain-external-package -- defines the generic installation rules
 387 # for external toolchain packages
 388 #
 389 #  argument 1 is the lowercase package name
 390 #  argument 2 is the uppercase package name, including a HOST_ prefix
 391 #             for host packages
 392 #  argument 3 is the uppercase package name, without the HOST_ prefix
 393 #             for host packages
 394 #  argument 4 is the type (target or host)
 395 ################################################################################
 396 define inner-toolchain-external-package
 397
 398 $(2)_INSTALL_STAGING = NO
 399 $(2)_ADD_TOOLCHAIN_DEPENDENCY = NO
 400
 401 # In fact, we don't need to download the toolchain, since it is already
 402 # available on the system, so force the site and source to be empty so
 403 # that nothing will be downloaded/extracted.
 404 ifeq ($$(BR2_TOOLCHAIN_EXTERNAL_PREINSTALLED),y)
 405 $(2)_SITE =
 406 $(2)_SOURCE =
 407 endif
 408
 409
 410 $(2)_TOOLCHAIN_WRAPPER_ARGS += $$(TOOLCHAIN_EXTERNAL_TOOLCHAIN_WRAPPER_ARGS)
 411
 412 $(2)_BUILD_CMDS = $$(TOOLCHAIN_WRAPPER_BUILD)
 413
 414 define $(2)_INSTALL_STAGING_CMDS
 415         $$(TOOLCHAIN_WRAPPER_INSTALL)
 416         $$(TOOLCHAIN_EXTERNAL_INSTALL_WRAPPER)
 417 endef
 418
 419 ifeq ($$(BR2_TOOLCHAIN_EXTERNAL_MUSL),y)
 420 $(2)_POST_INSTALL_STAGING_HOOKS += TOOLCHAIN_EXTERNAL_MUSL_LD_LINK
 421 endif
 422
 423 # Even though we're installing things in both the staging, the host
 424 # and the target directory, we do everything within the
 425 # install-staging step, arbitrarily.
 426 define $(2)_INSTALL_TARGET_CMDS
 427         $$(TOOLCHAIN_EXTERNAL_CREATE_TARGET_LIB_SYMLINK)
 428         $$(TOOLCHAIN_EXTERNAL_INSTALL_TARGET_LIBS)
 429         $$(TOOLCHAIN_EXTERNAL_INSTALL_TARGET_GDBSERVER)
 430         $$(TOOLCHAIN_EXTERNAL_FIXUP_UCLIBCNG_LDSO)
 431 endef
 432
 433 # Call the generic package infrastructure to generate the necessary
 434 # make targets
 435 $(call inner-generic-package,$(1),$(2),$(3),$(4))
 436
 437 endef
 438
 439 toolchain-external-package = $(call inner-toolchain-external-package,$(pkgname),$(call UPPERCASE,$(pkgname)),$(call UPPERCASE,$(pkgname)),target)