# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
+# This value will be inherited in the toolchain below.
+concurrent_links = exec_script("get_concurrent_links.py", [], "value")
+
# This template defines a toolchain for something that works like gcc
# (including clang).
#
solink_libs_section_postfix = ""
}
- # Make these apply to all tools below.
- lib_prefix = "-l"
- lib_dir_prefix="-L"
+ # These library switches can apply to all tools below.
+ lib_switch = "-l"
+ lib_dir_switch = "-L"
tool("cc") {
- # cflags_pch_c
- command = "$cc -MMD -MF \$out.d \$defines \$includes \$cflags \$cflags_c -c \$in -o \$out"
- description = "CC \$out"
- depfile = "\$out.d"
+ depfile = "{{output}}.d"
+ command = "$cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
depsformat = "gcc"
+ description = "CC {{output}}"
+ outputs = [
+ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
+ ]
}
+
tool("cxx") {
- # cflags_pch_cc
- command = "$cxx -MMD -MF \$out.d \$defines \$includes \$cflags \$cflags_cc -c \$in -o \$out"
- description = "CXX \$out"
- depfile = "\$out.d"
+ depfile = "{{output}}.d"
+ command = "$cxx -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} -c {{source}} -o {{output}}"
+ depsformat = "gcc"
+ description = "CXX {{output}}"
+ outputs = [
+ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
+ ]
+ }
+
+ tool("asm") {
+ # For GCC we can just use the C compiler to compile assembly.
+ depfile = "{{output}}.d"
+ command = "$cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
depsformat = "gcc"
+ description = "ASM {{output}}"
+ outputs = [
+ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
+ ]
}
+
tool("alink") {
- command = "rm -f \$out && $ar rcs \$out @\$rspfile"
- description = "AR \$out"
- rspfile = "\$out.rsp"
- rspfile_content = "\$in"
+ rspfile = "{{output}}.rsp"
+ command = "rm -f {{output}} && $ar rcs {{output}} @$rspfile"
+ description = "AR {{output}}"
+ rspfile_content = "{{inputs}}"
+ outputs = [
+ "{{target_out_dir}}/{{target_output_name}}{{output_extension}}"
+ ]
+ default_output_extension = ".a"
+ output_prefix = "lib"
}
+
tool("solink") {
- rspfile = "\$out.rsp"
- rspfile_content = "-Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive $solink_libs_section_prefix \$libs $solink_libs_section_postfix"
+ soname = "{{target_output_name}}{{output_extension}}" # e.g. "libfoo.so".
+ sofile = "{{root_out_dir}}/$soname" # Possibly including toolchain dir.
+ rspfile = sofile + ".rsp"
- # TODO(cjhopman): There needs to be a way for gn to correctly figure out
- # the outputs of a solink command.
+ # These variables are not built into GN but are helpers that implement
+ # (1) linking to produce a .so, (2) extracting the symbols from that file
+ # to a temporary file, (3) if the temporary file has differences from the
+ # existing .TOC file, overwrite it, otherwise, don't change it.
+ tocfile = sofile + ".TOC"
+ temporary_tocname = sofile + ".tmp"
+ link_command = "$ld -shared {{ldflags}} -o $sofile -Wl,-soname=$soname @$rspfile"
+ toc_command = "{ readelf -d $sofile | grep SONAME ; nm -gD -f p $soname | cut -f1-2 -d' '; } > $temporary_tocname"
+ replace_command = "if ! cmp -s $temporary_tocname $tocfile; then mv $temporary_tocname $tocfile; fi"
- link_command = "$ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname @\$rspfile"
- toc_command = "{ readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.tmp"
- replace_command = "if ! cmp -s \${lib}.tmp \${lib}.TOC; then mv \${lib}.tmp \${lib}.TOC; fi"
command = "$link_command && $toc_command && $replace_command"
-
if (defined(invoker.postsolink)) {
command += " && " + invoker.postsolink
}
+ rspfile_content = "-Wl,--whole-archive {{inputs}} {{solibs}} -Wl,--no-whole-archive $solink_libs_section_prefix {{libs}} $solink_libs_section_postfix"
+
+ description = "SOLINK $sofile"
- description = "SOLINK \$lib"
- #pool = "link_pool"
- restat = "1"
+ # Use this for {{output_extension}} expansions unless a target manually
+ # overrides it (in which case {{output_extension}} will be what the target
+ # specifies).
+ default_output_extension = ".so"
+
+ output_prefix = "lib"
+
+ # Since the above commands only updates the .TOC file when it changes, ask
+ # Ninja to check if the timestamp actually changed to know if downstream
+ # dependencies should be recompiled.
+ restat = true
+
+ # Tell GN about the output files. It will link to the sofile but use the
+ # tocfile for dependency management.
+ outputs = [
+ sofile,
+ tocfile,
+ ]
+ if (defined(invoker.solink_outputs)) {
+ outputs += invoker.solink_outputs
+ }
+ link_output = sofile
+ depend_output = tocfile
}
+
tool("link") {
- command = "$ld \$ldflags -o \$out -Wl,--start-group @\$rspfile \$solibs -Wl,--end-group $libs_section_prefix \$libs $libs_section_postfix"
- description = "LINK \$out"
- rspfile = "\$out.rsp"
- rspfile_content = "\$in"
- #pool = "link_pool"
+ outfile = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}"
+ rspfile = "$outfile.rsp"
+ command = "$ld {{ldflags}} -o $outfile -Wl,--start-group @$rspfile {{solibs}} -Wl,--end-group $libs_section_prefix {{libs}} $libs_section_postfix"
+ if (defined(invoker.postlink)) {
+ command += " && " + invoker.postlink
+ }
+ description = "LINK $outfile"
+ rspfile_content = "{{inputs}}"
+ outputs = [ outfile ]
+ if (defined(invoker.link_outputs)) {
+ outputs += invoker.link_outputs
+ }
}
+
tool("stamp") {
- command = "\${postbuilds}touch \$out"
- description = "STAMP \$out"
+ command = "touch {{output}}"
+ description = "STAMP {{output}}"
}
+
tool("copy") {
- command = "ln -f \$in \$out 2>/dev/null || (rm -rf \$out && cp -af \$in \$out)"
- description = "COPY \$in \$out"
+ command = "ln -f {{source}} {{output}} 2>/dev/null || (rm -rf {{output}} && cp -af {{source}} {{output}})"
+ description = "COPY {{source}} {{output}}"
}
# When invoking this toolchain not as the default one, these args will be
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