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# Copyright (c) 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# This template defines a GCC toolchain.
#
# It requires the following variables specifying the executables to run:
# - cc
# - cxx
# - ar
# - ld
# and the following which is used in the toolchain_args
# - toolchain_cpu_arch (What "cpu_arch" should be set to when invoking a
# build using this toolchain.)
# - toolchain_os (What "os" should be set to when invoking a build using this
# toolchain.)
#
# Optional parameters:
# - libs_section_prefix
# - libs_section_postfix
# The contents of these strings, if specified, will be placed around
# the libs section of the linker line. It allows one to inject libraries
# at the beginning and end for all targets in a toolchain.
# - deps
# Just fowarded to the toolchain definition.
template("gcc_toolchain") {
toolchain(target_name) {
assert(defined(invoker.cc), "gcc_toolchain() must specify a \"cc\" value")
assert(defined(invoker.cxx), "gcc_toolchain() must specify a \"cxx\" value")
assert(defined(invoker.ar), "gcc_toolchain() must specify a \"ar\" value")
assert(defined(invoker.ld), "gcc_toolchain() must specify a \"ld\" value")
assert(defined(invoker.toolchain_cpu_arch),
"gcc_toolchain() must specify a \"toolchain_cpu_arch\"")
assert(defined(invoker.toolchain_os),
"gcc_toolchain() must specify a \"toolchain_os\"")
# We can't do string interpolation ($ in strings) on things with dots in
# them. To allow us to use $cc below, for example, we create copies of
# these values in our scope.
cc = invoker.cc
cxx = invoker.cxx
ar = invoker.ar
ld = invoker.ld
# Bring these into our scope for string interpolation with default values.
if (defined(invoker.libs_section_prefix)) {
libs_section_prefix = invoker.libs_section_prefix
} else {
libs_section_prefix = ""
}
if (defined(invoker.libs_section_postfix)) {
libs_section_postfix = invoker.libs_section_postfix
} else {
libs_section_postfix = ""
}
# Make these apply to all tools below.
lib_prefix = "-l"
lib_dir_prefix="-L"
tool("cc") {
# cflags_pch_c
command = "$cc -MMD -MF \$out.d \$defines \$includes \$cflags \$cflags_c -c \$in -o \$out"
description = "CC \$out"
depfile = "\$out.d"
depsformat = "gcc"
}
tool("cxx") {
# cflags_pch_cc
command = "$cxx -MMD -MF \$out.d \$defines \$includes \$cflags \$cflags_cc -c \$in -o \$out"
description = "CXX \$out"
depfile = "\$out.d"
depsformat = "gcc"
}
tool("alink") {
command = "rm -f \$out && $ar rcs \$out @\$rspfile"
description = "AR \$out"
rspfile = "\$out.rsp"
rspfile_content = "\$in"
}
tool("solink") {
command = "if [ ! -e \$lib -o ! -e \${lib}.TOC ]; then $ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname @\$rspfile && { readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.TOC; else $ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname -Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive $libs_section_prefix \$libs $libs_section_postfix && { readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.tmp && if ! cmp -s \${lib}.tmp \${lib}.TOC; then mv \${lib}.tmp \${lib}.TOC ; fi; fi"
description = "SOLINK \$lib"
rspfile = "\$out.rsp"
rspfile_content = "-Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive \$libs"
#pool = "link_pool"
restat = "1"
}
tool("link") {
command = "$ld \$ldflags -o \$out -Wl,--start-group @\$rspfile \$solibs -Wl,--end-group $libs_section_prefix \$libs $libs_section_postfix"
description = "LINK \$out"
rspfile = "\$out.rsp"
rspfile_content = "\$in"
#pool = "link_pool"
}
tool("stamp") {
command = "\${postbuilds}touch \$out"
description = "STAMP \$out"
}
tool("copy") {
command = "ln -f \$in \$out 2>/dev/null || (rm -rf \$out && cp -af \$in \$out)"
description = "COPY \$in \$out"
}
# When invoking this toolchain not as the default one, these args will be
# passed to the build. They are ignored when this is the default toolchain.
toolchain_args() {
cpu_arch = invoker.toolchain_cpu_arch
os = invoker.toolchain_os
}
if (defined(invoker.deps)) {
deps = invoker.deps
}
}
}
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